feat(accounting): Skontobedingungen auf Belegen und automatische Skonto-Vorschläge

Ausgangs- und Eingangsbelege erhalten Skontosatz und Frist, mit Vorgaben
bei Kunden und Lieferanten. Das PDF ergänzt automatisch einen Skontohinweis
(oder nutzt neue Textvorlagen-Variablen); bei Schlussrechnungen gilt der
Skonto für die Restforderung. Skontobedingungen werden aus E-Rechnungen
(#SKONTO# und ZUGFeRD) sowie von der KI-Vorbereitung übernommen. Die
Bankzuordnung erkennt Zahlungen abzüglich Skonto innerhalb der Frist und
bietet sie in der Vorschlagsübersicht direkt an. BWA-Erlöse und -Aufwand
berücksichtigen gebuchten Skonto im Zeitraum der Zahlung.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/pages/accounting/bwa.vue

@@ -1,4 +1,5 @@
 <script setup lang="ts">
+import { getCashDiscountNetTotals } from "~/utils/cashDiscount"
 import dayjs from "dayjs"
 import { getBankAllocationAmounts, getBankAllocationTaxBreakdown } from "~/utils/bankAllocationTax"
 import {
@@ -183,8 +184,12 @@ const selectedPeriodBounds = computed(() => {
   return { start, end }
 })
 
+// Skonto wirkt im Zeitraum der Zahlung: gewährter Skonto mindert Erlöse, erhaltener Skonto den Aufwand.
+const cashDiscountTotals = computed(() => getCashDiscountNetTotals(filteredStatementAllocations.value))
+
 const incomeTotal = computed(() => {
-  return Number(filteredDocuments.value.reduce((sum, doc) => sum + computeDocumentNet(doc), 0).toFixed(2))
+  const documents = filteredDocuments.value.reduce((sum, doc) => sum + computeDocumentNet(doc), 0)
+  return Number((documents - cashDiscountTotals.value.grantedNet).toFixed(2))
 })
 
 const expenseNetTotal = computed(() => {
@@ -196,7 +201,7 @@ const expenseNetTotal = computed(() => {
 
   const depreciations = depreciationTotal.value
 
-  return Number((invoiceExpenses + directAccountExpenses + depreciations).toFixed(2))
+  return Number((invoiceExpenses + directAccountExpenses + depreciations - cashDiscountTotals.value.receivedNet).toFixed(2))
 })
 
 const expenseGrossTotal = computed(() => {
@@ -206,7 +211,7 @@ const expenseGrossTotal = computed(() => {
 
   const depreciations = depreciationTotal.value
 
-  return Number((invoiceExpenses + directAccountExpenses + depreciations).toFixed(2))
+  return Number((invoiceExpenses + directAccountExpenses + depreciations - cashDiscountTotals.value.receivedGross).toFixed(2))
 })
 
 const taxSummary = computed(() => {

frontend/pages/banking/index.vue

@@ -1,5 +1,5 @@
 <script setup>
-import { sumSettledAllocations } from "~/utils/cashDiscount"
+import { matchCashDiscountPayment, sumSettledAllocations } from "~/utils/cashDiscount"
 import { parseDate } from "@internationalized/date"
 
 const {$api, $dayjs} = useNuxtApp()
@@ -387,25 +387,52 @@ const getTopEntitySuggestion = (statement) => {
   return suggestions[0] || null
 }
 
+// Zahlung entspricht dem offenen Betrag abzüglich vereinbartem Skonto und liegt in der Frist.
+const getCashDiscountMatch = (statement, kind, entity) => {
+  const paymentDate = getStatementDate(statement) ? $dayjs(getStatementDate(statement)).format("YYYY-MM-DD") : null
+  if (kind === "createddocument") {
+    const days = entity.cashDiscountDays
+    return matchCashDiscountPayment({
+      open: entity.openSum,
+      payment: calculateOpenSum(statement),
+      percent: entity.cashDiscountPercent,
+      dueDate: entity.documentDate && days !== null && days !== undefined && days !== ""
+          ? $dayjs(entity.documentDate).add(Number(days), "day").format("YYYY-MM-DD")
+          : null,
+      paymentDate
+    })
+  }
+  return matchCashDiscountPayment({
+    open: getInvoiceSum(entity, true),
+    payment: calculateOpenSum(statement),
+    percent: entity.cashDiscountPercent,
+    dueDate: entity.cashDiscountDueDate || null,
+    paymentDate
+  })
+}
+
 const getDocumentSuggestionMeta = (statement, document, suggestion) => {
   let score = 0
   const remaining = Math.abs(Number(calculateOpenSum(statement)))
   const openSum = Math.abs(Number(document.openSum))
   const purposeMatches = getMatchingPurposeParts(statement.text, [document.documentNumber, document.title, document.description])
-  const amountLabel = getAmountMatchLabel(openSum, remaining)
-  const withinTolerance = isWithinAmountTolerance(openSum, remaining)
+  const cashDiscountMatch = getCashDiscountMatch(statement, "createddocument", document)
+  const amountLabel = cashDiscountMatch
+      ? `Passt mit ${String(cashDiscountMatch.percent).replace(".", ",")} % Skonto`
+      : getAmountMatchLabel(openSum, remaining)
+  const withinTolerance = cashDiscountMatch || isWithinAmountTolerance(openSum, remaining)
 
   if (!withinTolerance) {
-    return { score: 0, amountLabel: null, purposeMatches: [] }
+    return { score: 0, amountLabel: null, purposeMatches: [], cashDiscountMatch: null }
   }
 
-  if (openSum === remaining) score += 100
+  if (openSum === remaining || cashDiscountMatch) score += 100
   else score += Math.max(0, 60 - Math.abs(openSum - remaining))
 
   if (suggestion && document.customer?.id === suggestion.id) score += 80
   if (purposeMatches.length > 0) score += 50 + (purposeMatches.length * 10)
 
-  return { score, amountLabel, purposeMatches }
+  return { score, amountLabel, purposeMatches, cashDiscountMatch }
 }
 
 const getIncomingInvoiceSuggestionMeta = (statement, invoice, suggestion) => {
@@ -413,20 +440,23 @@ const getIncomingInvoiceSuggestionMeta = (statement, invoice, suggestion) => {
   const remaining = Math.abs(Number(calculateOpenSum(statement)))
   const openSum = Math.abs(Number(getInvoiceSum(invoice, true)))
   const purposeMatches = getMatchingPurposeParts(statement.text, [invoice.reference, invoice.description])
-  const amountLabel = getAmountMatchLabel(openSum, remaining)
-  const withinTolerance = isWithinAmountTolerance(openSum, remaining)
+  const cashDiscountMatch = getCashDiscountMatch(statement, "incominginvoice", invoice)
+  const amountLabel = cashDiscountMatch
+      ? `Passt mit ${String(cashDiscountMatch.percent).replace(".", ",")} % Skonto`
+      : getAmountMatchLabel(openSum, remaining)
+  const withinTolerance = cashDiscountMatch || isWithinAmountTolerance(openSum, remaining)
 
   if (!withinTolerance) {
-    return { score: 0, amountLabel: null, purposeMatches: [] }
+    return { score: 0, amountLabel: null, purposeMatches: [], cashDiscountMatch: null }
   }
 
-  if (openSum === remaining) score += 100
+  if (openSum === remaining || cashDiscountMatch) score += 100
   else score += Math.max(0, 60 - Math.abs(openSum - remaining))
 
   if (suggestion && invoice.vendor?.id === suggestion.id) score += 80
   if (purposeMatches.length > 0) score += 50 + (purposeMatches.length * 10)
 
-  return { score, amountLabel, purposeMatches }
+  return { score, amountLabel, purposeMatches, cashDiscountMatch }
 }
 
 const getRowSuggestions = (statement) => {
@@ -435,7 +465,7 @@ const getRowSuggestions = (statement) => {
   const topDocument = (entitySuggestion?.type === "customer" ? openDocuments.value.filter(doc => doc.customer?.id === entitySuggestion.id) : openDocuments.value)
       .map(document => {
         const meta = getDocumentSuggestionMeta(statement, document, entitySuggestion?.type === "customer" ? entitySuggestion : null)
-        return { ...document, suggestionScore: meta.score, suggestionAmountLabel: meta.amountLabel, suggestionPurposeMatches: meta.purposeMatches, suggestionKey: `document:${document.id}` }
+        return { ...document, suggestionScore: meta.score, suggestionAmountLabel: meta.amountLabel, suggestionPurposeMatches: meta.purposeMatches, suggestionCashDiscount: meta.cashDiscountMatch, suggestionKey: `document:${document.id}` }
       })
       .filter(document => !isSuggestionDismissed(statement.id, document.suggestionKey))
       .filter(document => document.suggestionScore >= 80 || document.suggestionPurposeMatches?.length > 0)
@@ -444,7 +474,7 @@ const getRowSuggestions = (statement) => {
   const topIncomingInvoice = (entitySuggestion?.type === "vendor" ? openIncomingInvoices.value.filter(invoice => invoice.vendor?.id === entitySuggestion.id) : openIncomingInvoices.value)
       .map(invoice => {
         const meta = getIncomingInvoiceSuggestionMeta(statement, invoice, entitySuggestion?.type === "vendor" ? entitySuggestion : null)
-        return { ...invoice, suggestionScore: meta.score, suggestionAmountLabel: meta.amountLabel, suggestionPurposeMatches: meta.purposeMatches, suggestionKey: `invoice:${invoice.id}` }
+        return { ...invoice, suggestionScore: meta.score, suggestionAmountLabel: meta.amountLabel, suggestionPurposeMatches: meta.purposeMatches, suggestionCashDiscount: meta.cashDiscountMatch, suggestionKey: `invoice:${invoice.id}` }
       })
       .filter(invoice => !isSuggestionDismissed(statement.id, invoice.suggestionKey))
       .filter(invoice => invoice.suggestionScore >= 80 || invoice.suggestionPurposeMatches?.length > 0)
@@ -552,6 +582,24 @@ const handleAssignIncomingInvoice = async (row, invoice, event) => {
   })
 }
 
+// Bucht die Zahlung zusammen mit dem vereinbarten Skonto, wenn Betrag und Frist zu den Skontobedingungen passen.
+const handleAssignWithCashDiscount = async (row, kind, entity, event) => {
+  event.stopPropagation()
+  const match = entity.suggestionCashDiscount
+  if (!match) return
+  try {
+    await saveAllocation({
+      [kind]: entity.id,
+      bankstatement: row.id,
+      amount: Number(calculateOpenSum(row)),
+      cashDiscountAmount: match.discount,
+      description: "Automatischer Vorschlag mit Skonto"
+    })
+  } catch (err) {
+    toast.add({ title: "Skonto konnte nicht gebucht werden", description: err?.data?.error, color: "error" })
+  }
+}
+
 const dismissSuggestion = (row, suggestionKey, event) => {
   event.stopPropagation()
   const bankingSettings = tempStore.settings?.banking || {}
@@ -928,7 +976,15 @@ onMounted(() => {
                   </UBadge>
                 </div>
               </div>
-              <UButton size="sm" color="emerald" @click="handleAssignDocument(selectedSuggestionRow.row, selectedSuggestionRow.suggestions.topDocument, $event)">
+              <UButton
+                  v-if="selectedSuggestionRow.suggestions.topDocument.suggestionCashDiscount"
+                  size="sm"
+                  color="warning"
+                  @click="handleAssignWithCashDiscount(selectedSuggestionRow.row, 'createddocument', selectedSuggestionRow.suggestions.topDocument, $event)"
+              >
+                Mit Skonto zuweisen
+              </UButton>
+              <UButton v-else size="sm" color="emerald" @click="handleAssignDocument(selectedSuggestionRow.row, selectedSuggestionRow.suggestions.topDocument, $event)">
                 Zuweisen
               </UButton>
               <UButton size="sm" color="gray" variant="ghost" @click="dismissSuggestion(selectedSuggestionRow.row, selectedSuggestionRow.suggestions.topDocument.suggestionKey, $event)">
@@ -951,7 +1007,15 @@ onMounted(() => {
                   </UBadge>
                 </div>
               </div>
-              <UButton size="sm" color="error" @click="handleAssignIncomingInvoice(selectedSuggestionRow.row, selectedSuggestionRow.suggestions.topIncomingInvoice, $event)">
+              <UButton
+                  v-if="selectedSuggestionRow.suggestions.topIncomingInvoice.suggestionCashDiscount"
+                  size="sm"
+                  color="warning"
+                  @click="handleAssignWithCashDiscount(selectedSuggestionRow.row, 'incominginvoice', selectedSuggestionRow.suggestions.topIncomingInvoice, $event)"
+              >
+                Mit Skonto zuweisen
+              </UButton>
+              <UButton v-else size="sm" color="error" @click="handleAssignIncomingInvoice(selectedSuggestionRow.row, selectedSuggestionRow.suggestions.topIncomingInvoice, $event)">
                 Zuweisen
               </UButton>
               <UButton size="sm" color="gray" variant="ghost" @click="dismissSuggestion(selectedSuggestionRow.row, selectedSuggestionRow.suggestions.topIncomingInvoice.suggestionKey, $event)">

frontend/pages/banking/statements/[mode]/[[id]].vue

@@ -1,7 +1,7 @@
 <script setup>
 import dayjs from "dayjs";
 import { BANK_ALLOCATION_TAX_ITEMS, getBankAllocationAmounts } from "~/utils/bankAllocationTax"
-import { sumSettledAllocations } from "~/utils/cashDiscount"
+import { matchCashDiscountPayment, sumSettledAllocations } from "~/utils/cashDiscount"
 import {
   DEPRECIATION_METHOD_ITEMS,
   EXPENSE_BOOKING_MODE_ITEMS,
@@ -421,6 +421,30 @@ const isWithinAmountTolerance = (candidateSum, remaining) => {
   return difference / reference <= 0.1
 }
 
+// Erkennt Zahlungen, die genau dem offenen Betrag abzüglich vereinbartem Skonto entsprechen und in der Frist liegen.
+const getCashDiscountMatch = (kind, entity) => {
+  const paymentDate = itemInfo.value?.date || itemInfo.value?.valueDate
+  if (kind === "createddocument") {
+    const days = entity.cashDiscountDays
+    return matchCashDiscountPayment({
+      open: entity.openSum,
+      payment: calculateOpenSum.value,
+      percent: entity.cashDiscountPercent,
+      dueDate: entity.documentDate && days !== null && days !== undefined && days !== ""
+          ? dayjs(entity.documentDate).add(Number(days), "day").format("YYYY-MM-DD")
+          : null,
+      paymentDate: paymentDate ? dayjs(paymentDate).format("YYYY-MM-DD") : null
+    })
+  }
+  return matchCashDiscountPayment({
+    open: getInvoiceSum(entity, true),
+    payment: calculateOpenSum.value,
+    percent: entity.cashDiscountPercent,
+    dueDate: entity.cashDiscountDueDate || null,
+    paymentDate: paymentDate ? dayjs(paymentDate).format("YYYY-MM-DD") : null
+  })
+}
+
 const getDocumentSuggestionMeta = (document, suggestion) => {
   let score = 0
   const remaining = Math.abs(Number(calculateOpenSum.value))
@@ -430,18 +454,22 @@ const getDocumentSuggestionMeta = (document, suggestion) => {
     document.title,
     document.description
   ])
-  const amountLabel = getAmountMatchLabel(openSum, remaining)
-  const withinTolerance = isWithinAmountTolerance(openSum, remaining)
+  const cashDiscountMatch = getCashDiscountMatch("createddocument", document)
+  const amountLabel = cashDiscountMatch
+      ? `Passt mit ${String(cashDiscountMatch.percent).replace(".", ",")} % Skonto`
+      : getAmountMatchLabel(openSum, remaining)
+  const withinTolerance = cashDiscountMatch || isWithinAmountTolerance(openSum, remaining)
 
   if (!withinTolerance) {
     return {
       score: 0,
       purposeMatches: [],
-      amountLabel: null
+      amountLabel: null,
+      cashDiscountMatch: null
     }
   }
 
-  if (openSum === remaining) score += 100
+  if (openSum === remaining || cashDiscountMatch) score += 100
   else score += Math.max(0, 60 - Math.abs(openSum - remaining))
 
   if (suggestion && document.customer?.id === suggestion.id) score += 80
@@ -450,7 +478,8 @@ const getDocumentSuggestionMeta = (document, suggestion) => {
   return {
     score,
     purposeMatches,
-    amountLabel
+    amountLabel,
+    cashDiscountMatch
   }
 }
 
@@ -462,18 +491,22 @@ const getInvoiceSuggestionMeta = (invoice, suggestion) => {
     invoice.reference,
     invoice.description
   ])
-  const amountLabel = getAmountMatchLabel(openSum, remaining)
-  const withinTolerance = isWithinAmountTolerance(openSum, remaining)
+  const cashDiscountMatch = getCashDiscountMatch("incominginvoice", invoice)
+  const amountLabel = cashDiscountMatch
+      ? `Passt mit ${String(cashDiscountMatch.percent).replace(".", ",")} % Skonto`
+      : getAmountMatchLabel(openSum, remaining)
+  const withinTolerance = cashDiscountMatch || isWithinAmountTolerance(openSum, remaining)
 
   if (!withinTolerance) {
     return {
       score: 0,
       purposeMatches: [],
-      amountLabel: null
+      amountLabel: null,
+      cashDiscountMatch: null
     }
   }
 
-  if (openSum === remaining) score += 100
+  if (openSum === remaining || cashDiscountMatch) score += 100
   else score += Math.max(0, 60 - Math.abs(openSum - remaining))
 
   if (suggestion && invoice.vendor?.id === suggestion.id) score += 80
@@ -482,7 +515,8 @@ const getInvoiceSuggestionMeta = (invoice, suggestion) => {
   return {
     score,
     purposeMatches,
-    amountLabel
+    amountLabel,
+    cashDiscountMatch
   }
 }
 
@@ -498,6 +532,7 @@ const suggestedDocuments = computed(() => {
           suggestionScore: meta.score,
           suggestionPurposeMatches: meta.purposeMatches,
           suggestionAmountLabel: meta.amountLabel,
+          suggestionCashDiscount: meta.cashDiscountMatch,
           suggestionKey: `document:${document.id}`
         }
       })
@@ -518,6 +553,7 @@ const suggestedIncomingInvoices = computed(() => {
           suggestionScore: meta.score,
           suggestionPurposeMatches: meta.purposeMatches,
           suggestionAmountLabel: meta.amountLabel,
+          suggestionCashDiscount: meta.cashDiscountMatch,
           suggestionKey: `invoice:${invoice.id}`
         }
       })
@@ -537,6 +573,7 @@ const fallbackSuggestedDocuments = computed(() => {
           suggestionScore: meta.score,
           suggestionPurposeMatches: meta.purposeMatches,
           suggestionAmountLabel: meta.amountLabel,
+          suggestionCashDiscount: meta.cashDiscountMatch,
           suggestionKey: `document:${document.id}`
         }
       })
@@ -557,6 +594,7 @@ const fallbackSuggestedIncomingInvoices = computed(() => {
           suggestionScore: meta.score,
           suggestionPurposeMatches: meta.purposeMatches,
           suggestionAmountLabel: meta.amountLabel,
+          suggestionCashDiscount: meta.cashDiscountMatch,
           suggestionKey: `invoice:${invoice.id}`
         }
       })
@@ -1084,7 +1122,7 @@ setup()
                       v-if="canBookCashDiscount('createddocument', document)"
                       size="xs"
                       color="warning"
-                      variant="soft"
+                      :variant="document.suggestionCashDiscount ? 'solid' : 'soft'"
                       @click="openCashDiscountModal('createddocument', document)"
                   >
                     Mit Skonto
@@ -1127,7 +1165,7 @@ setup()
                       v-if="canBookCashDiscount('incominginvoice', invoice)"
                       size="xs"
                       color="warning"
-                      variant="soft"
+                      :variant="invoice.suggestionCashDiscount ? 'solid' : 'soft'"
                       @click="openCashDiscountModal('incominginvoice', invoice)"
                   >
                     Mit Skonto
@@ -1182,6 +1220,7 @@ setup()
                     <div class="text-right">
                       <div class="font-mono font-bold text-sm">{{ displayCurrency(document.openSum) }}</div>
                       <div class="text-xs text-gray-400">Offen</div>
+                      <UBadge v-if="getCashDiscountMatch('createddocument', document)" size="xs" color="warning" variant="subtle">Skonto passt</UBadge>
                     </div>
                     <UTooltip text="Zuweisen">
                       <UButton
@@ -1251,6 +1290,7 @@ setup()
                         {{ displayCurrency(getInvoiceSum(item, true)) }}
                       </div>
                       <div class="text-xs text-gray-400">Offen</div>
+                      <UBadge v-if="getCashDiscountMatch('incominginvoice', item)" size="xs" color="warning" variant="subtle">Skonto passt</UBadge>
                     </div>
                     <UTooltip text="Zuweisen">
                       <UButton

frontend/pages/createDocument/edit/[[id]].vue

@@ -6,6 +6,7 @@ import {useFunctions} from "~/composables/useFunctions.js";
 import EntityModalButtons from "~/components/EntityModalButtons.vue";
 import { documentTemplateHandlebars } from "~/utils/handlebars";
 import { getTitleSectionMove, moveTitleSection } from "~/utils/documentTitleSections.js";
+import { appendCashDiscountText, buildCashDiscountTerms, formatCashDiscountText, getCashDiscountTemplateContext } from "~/utils/cashDiscount";
 
 const dataStore = useDataStore()
 const profileStore = useProfileStore()
@@ -57,6 +58,8 @@ const itemInfo = ref({
   deliveryDateType: "Lieferdatum",
   dateOfPerformance: null,
   paymentDays: auth.activeTenantData.standardPaymentDays,
+  cashDiscountPercent: null,
+  cashDiscountDays: null,
   payment_type: "transfer",
   outgoingsepamandate: null,
   availableInPortal: false,
@@ -635,7 +638,11 @@ const setupPage = async () => {
         if (optionsToImport.deliveryDate) itemInfo.value.deliveryDate = linkedDocument.deliveryDate
         if (optionsToImport.deliveryDateEnd) itemInfo.value.deliveryDateEnd = linkedDocument.deliveryDateEnd
         if (optionsToImport.documentDate) itemInfo.value.documentDate = linkedDocument.documentDate
-        if (optionsToImport.paymentDays) itemInfo.value.paymentDays = linkedDocument.paymentDays
+        if (optionsToImport.paymentDays) {
+          itemInfo.value.paymentDays = linkedDocument.paymentDays
+          itemInfo.value.cashDiscountPercent = linkedDocument.cashDiscountPercent ?? null
+          itemInfo.value.cashDiscountDays = linkedDocument.cashDiscountDays ?? null
+        }
         if (optionsToImport.payment_type) itemInfo.value.payment_type = linkedDocument.payment_type
         if (optionsToImport.customSurchargePercentage) itemInfo.value.customSurchargePercentage = linkedDocument.customSurchargePercentage
         if (optionsToImport.contactPerson) itemInfo.value.contactPerson = linkedDocument.contactPerson
@@ -663,6 +670,8 @@ const setupPage = async () => {
         itemInfo.value.deliveryDateEnd = linkedDocument.deliveryDateEnd
         itemInfo.value.documentDate = linkedDocument.documentDate
         itemInfo.value.paymentDays = linkedDocument.paymentDays
+        itemInfo.value.cashDiscountPercent = linkedDocument.cashDiscountPercent ?? null
+        itemInfo.value.cashDiscountDays = linkedDocument.cashDiscountDays ?? null
         itemInfo.value.payment_type = linkedDocument.payment_type
         itemInfo.value.customSurchargePercentage = linkedDocument.customSurchargePercentage
         itemInfo.value.contactPerson = linkedDocument.contactPerson
@@ -833,6 +842,10 @@ const setCustomerData = async (customerId, loadOnlyAdress = false) => {
     itemInfo.value.address.country = customer.infoData.country
 
     if (!loadOnlyAdress && customer.customPaymentDays) itemInfo.value.paymentDays = customer.customPaymentDays
+    if (!loadOnlyAdress && customer.customCashDiscountPercent) {
+      itemInfo.value.cashDiscountPercent = customer.customCashDiscountPercent
+      itemInfo.value.cashDiscountDays = customer.customCashDiscountDays ?? null
+    }
     if (!loadOnlyAdress && customer.custom_payment_type) itemInfo.value.payment_type = customer.custom_payment_type
     if (!loadOnlyAdress) {
       itemInfo.value.taxType = normalizeTaxTypeValue(customer.customTaxType)
@@ -1357,6 +1370,17 @@ const documentTotal = computed(() => {
   }
 })
 
+// Skonto bezieht sich bei Schlussrechnungen auf die Restforderung nach Abzug der Abschläge.
+const cashDiscountTerms = computed(() => {
+  if (!["invoices", "advanceInvoices", "serialInvoices"].includes(itemInfo.value.type)) return null
+  return buildCashDiscountTerms({
+    percent: itemInfo.value.cashDiscountPercent,
+    days: itemInfo.value.cashDiscountDays,
+    documentDate: itemInfo.value.documentDate ? dayjs(itemInfo.value.documentDate).format("YYYY-MM-DD") : null,
+    amount: itemInfo.value.type === "invoices" ? documentTotal.value.totalSumToPay : documentTotal.value.totalGross
+  })
+})
+
 const documentReport = computed(() => {
 
   let totalProductsPurchasePrice = 0
@@ -1574,7 +1598,8 @@ const getDocumentData = async () => {
       kundenname: customerData && customerData.name,
       zahlungsziel_in_tagen: itemInfo.paymentDays,
       zahlungsart: itemInfo.payment_type === "transfer" ? "Überweisung" : "Lastschrift",
-      diesel_gesamtverbrauch: (itemInfo.agriculture && itemInfo.agriculture.dieselUsageTotal) && itemInfo.agriculture.dieselUsageTotal
+      diesel_gesamtverbrauch: (itemInfo.agriculture && itemInfo.agriculture.dieselUsageTotal) && itemInfo.agriculture.dieselUsageTotal,
+      ...getCashDiscountTemplateContext(cashDiscountTerms.value)
     }
   }
 
@@ -1684,7 +1709,7 @@ const getDocumentData = async () => {
     ],
     title: itemInfo.value.title,
     description: itemInfo.value.description,
-    endText: templateEndText(generateContext(itemInfo.value, contactData)),
+    endText: appendCashDiscountText(templateEndText(generateContext(itemInfo.value, contactData)), itemInfo.value.endText, cashDiscountTerms.value),
     startText: templateStartText(generateContext(itemInfo.value, contactData)),
     rows: rows,
     totalArray: [
@@ -1819,6 +1844,8 @@ const saveSerialInvoice = async () => {
     project: normalizeEntityId(itemInfo.value.project),
     costcentre: itemInfo.value.costcentre,
     paymentDays: itemInfo.value.paymentDays,
+    cashDiscountPercent: itemInfo.value.cashDiscountPercent === "" || itemInfo.value.cashDiscountPercent === null ? null : Number(itemInfo.value.cashDiscountPercent),
+    cashDiscountDays: itemInfo.value.cashDiscountDays === "" || itemInfo.value.cashDiscountDays === null ? null : Number(itemInfo.value.cashDiscountDays),
     payment_type: itemInfo.value.payment_type,
     outgoingsepamandate: normalizeEntityId(itemInfo.value.outgoingsepamandate),
     deliveryDateType: "Leistungszeitraum",
@@ -1935,6 +1962,8 @@ const saveDocument = async (state, resetup = false) => {
     deliveryDate: itemInfo.value.deliveryDate,
     deliveryDateEnd: itemInfo.value.deliveryDateEnd,
     paymentDays: itemInfo.value.paymentDays,
+    cashDiscountPercent: itemInfo.value.cashDiscountPercent === "" || itemInfo.value.cashDiscountPercent === null ? null : Number(itemInfo.value.cashDiscountPercent),
+    cashDiscountDays: itemInfo.value.cashDiscountDays === "" || itemInfo.value.cashDiscountDays === null ? null : Number(itemInfo.value.cashDiscountDays),
     payment_type: itemInfo.value.payment_type,
     outgoingsepamandate: normalizeEntityId(itemInfo.value.outgoingsepamandate),
     deliveryDateType: itemInfo.value.deliveryDateType,
@@ -2690,6 +2719,39 @@ const setRowData = async (row, service = {sellingPriceComposed: {}}, product = {
                       class="w-full"
                   />
                 </UFormField>
+                <UFormField
+                    v-if="['invoices', 'advanceInvoices', 'serialInvoices'].includes(itemInfo.type)"
+                    class="min-w-0 flex-1"
+                    label="Skonto:"
+                    :help="cashDiscountTerms ? formatCashDiscountText(cashDiscountTerms) : undefined"
+                >
+                  <div class="flex gap-1">
+                    <UInput
+                        type="number"
+                        step="0.01"
+                        min="0"
+                        max="10"
+                        placeholder="%"
+                        v-model="itemInfo.cashDiscountPercent"
+                        class="w-full"
+                    >
+                      <template #trailing>
+                        <span class="text-gray-500 dark:text-gray-400 text-xs">%</span>
+                      </template>
+                    </UInput>
+                    <UInput
+                        type="number"
+                        min="0"
+                        placeholder="Tage"
+                        v-model="itemInfo.cashDiscountDays"
+                        class="w-full"
+                    >
+                      <template #trailing>
+                        <span class="text-gray-500 dark:text-gray-400 text-xs">Tage</span>
+                      </template>
+                    </UInput>
+                  </div>
+                </UFormField>
                 <UFormField
                     class="min-w-0 flex-1"
                     label="Individueller Aufschlag:"

frontend/pages/incomingInvoices/[mode]/[id].vue

@@ -34,6 +34,8 @@ const itemInfo = ref({
   reference: "",
   date:  null,
   dueDate: null,
+  cashDiscountPercent: null,
+  cashDiscountDueDate: null,
   paymentType: "Überweisung",
   description: "",
   state: "Entwurf",
@@ -147,6 +149,28 @@ const setDateFieldToToday = (field) => {
   itemInfo.value[field] = dayjs().toDate()
 }
 
+// Skontofrist als reines Datum speichern, damit der Vergleich mit dem Zahlungsdatum nicht durch Zeitzonen kippt.
+const setCashDiscountDueDate = (value) => {
+  itemInfo.value.cashDiscountDueDate = value ? dayjs(value.toString()).format("YYYY-MM-DD") : null
+}
+
+// Lieferanten-Vorgabe nur bei bewusster Auswahl übernehmen, nicht beim Laden eines Belegs.
+const applyVendorCashDiscount = (vendorId) => {
+  const vendor = vendors.value.find((item) => item.id === vendorId)
+  if (!vendor?.cashDiscountPercent || itemInfo.value.cashDiscountPercent) return
+  itemInfo.value.cashDiscountPercent = vendor.cashDiscountPercent
+  if (itemInfo.value.date && vendor.cashDiscountDays !== null && vendor.cashDiscountDays !== undefined) {
+    itemInfo.value.cashDiscountDueDate = dayjs(itemInfo.value.date).add(vendor.cashDiscountDays, "day").format("YYYY-MM-DD")
+  }
+}
+
+const cashDiscountAmount = computed(() => {
+  const percent = Number(itemInfo.value.cashDiscountPercent || 0)
+  if (!(percent > 0)) return null
+  const gross = (itemInfo.value.accounts || []).reduce((sum, account) => sum + Number(account.amountNet || 0) + Number(account.amountTax || 0), 0)
+  return Number((Math.abs(gross) * percent / 100).toFixed(2))
+})
+
 const getDateButtonLabel = (value, emptyLabel = "Kein Datum") => value ? dayjs(value).format('DD.MM.YYYY') : emptyLabel
 const formatDate = (value) => value ? dayjs(value).format("DD.MM.YYYY") : "-"
 const formatMoney = (value) => `${Number(value || 0).toFixed(2).replace(".", ",")} €`
@@ -333,6 +357,9 @@ const updateIncomingInvoice = async (setBooked = false) => {
 
   let item = { ...itemInfo.value }
   item.accounts = (item.accounts || []).map((account) => ensureDepreciationDefaults({ ...account }, item.date))
+  const cashDiscountPercent = Number(item.cashDiscountPercent)
+  item.cashDiscountPercent = Number.isFinite(cashDiscountPercent) && cashDiscountPercent > 0 ? cashDiscountPercent : null
+  item.cashDiscountDueDate = item.cashDiscountPercent && item.cashDiscountDueDate ? dayjs(item.cashDiscountDueDate).format("YYYY-MM-DD") : null
   delete item.files
   item.state = keepBooked ? "Gebucht" : "Entwurf"
 
@@ -569,6 +596,14 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
                   <dt class="text-gray-500">Fälligkeitsdatum</dt>
                   <dd class="font-medium">{{ formatDate(itemInfo.dueDate) }}</dd>
                 </div>
+                <div v-if="itemInfo.cashDiscountPercent">
+                  <dt class="text-gray-500">Skonto</dt>
+                  <dd class="font-medium">
+                    {{ String(itemInfo.cashDiscountPercent).replace(".", ",") }} %
+                    <span v-if="cashDiscountAmount">({{ formatMoney(cashDiscountAmount) }})</span>
+                    <span v-if="itemInfo.cashDiscountDueDate"> bis {{ formatDate(itemInfo.cashDiscountDueDate) }}</span>
+                  </dd>
+                </div>
                 <div>
                   <dt class="text-gray-500">Bankbuchungsdatum</dt>
                   <dd class="font-medium">{{ bankBookingDateLabel }}</dd>
@@ -637,6 +672,7 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
                       :disabled="mode === 'show'"
                       :filter-fields="['name', 'vendorNumber']"
                       :color="itemInfo.vendor ? 'primary' : 'error'"
+                      @update:model-value="applyVendorCashDiscount"
                   >
                     <template #default>
                       {{ vendors.find(v => v.id === itemInfo.vendor)?.name || 'Bitte wählen' }}
@@ -657,7 +693,7 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
                       v-if="mode !== 'show'"
                       type="vendors"
                       :id="itemInfo.vendor"
-                      @return-data="(data) => itemInfo.vendor = data.id"
+                      @return-data="(data) => { itemInfo.vendor = data.id; applyVendorCashDiscount(data.id) }"
                   />
                 </div>
               </UFormField>
@@ -736,6 +772,47 @@ const hasBlockingIncomingInvoiceErrors = computed(() => blockingIncomingInvoiceE
                 </UPopover>
               </UFormField>
 
+              <UFormField
+                  label="Skonto"
+                  :help="cashDiscountAmount ? `Abzug ${formatMoney(cashDiscountAmount)} bei Zahlung in der Frist` : undefined"
+              >
+                <UInput
+                    type="number"
+                    step="0.01"
+                    min="0"
+                    max="10"
+                    placeholder="z. B. 2"
+                    v-model="itemInfo.cashDiscountPercent"
+                    :disabled="mode === 'show'"
+                    class="w-full"
+                >
+                  <template #trailing><span class="text-gray-500 text-xs">%</span></template>
+                </UInput>
+              </UFormField>
+
+              <UFormField label="Skonto bis">
+                <UPopover class="w-full" :content="{ side: 'bottom', align: 'start' }">
+                  <UButton
+                      block
+                      icon="i-heroicons-calendar"
+                      :label="getDateButtonLabel(itemInfo.cashDiscountDueDate, 'Keine Skontofrist')"
+                      :disabled="mode === 'show' || !itemInfo.cashDiscountPercent"
+                      color="neutral"
+                      variant="outline"
+                      class="w-full justify-start"
+                  />
+                  <template #content>
+                    <div class="p-2">
+                      <UCalendar
+                          :model-value="getCalendarValue(itemInfo.cashDiscountDueDate)"
+                          @update:model-value="setCashDiscountDueDate"
+                          :week-starts-on="1"
+                      />
+                    </div>
+                  </template>
+                </UPopover>
+              </UFormField>
+
               <UFormField label="Beschreibung / Notiz" class="md:col-span-2">
                 <UTextarea class="w-full" v-model="itemInfo.description" :rows="2" autoresize :disabled="mode === 'show'" />
               </UFormField>

frontend/pages/settings/texttemplates.vue

@@ -29,12 +29,18 @@ const variableDefinitions = [
   { key: '{{titel}}', label: 'Titel', desc: 'Titel des Kunden' },
   { key: '{{zahlungsziel_in_tagen}}', label: 'Zahlungsziel', desc: 'In Tagen' },
   { key: '{{lohnkosten}}', label: 'Lohnkosten', desc: 'Ausgewiesene Lohnkosten' },
+  { key: '{{skonto_hinweis}}', label: 'Skonto-Hinweis', desc: 'Kompletter Satz; ohne Skontovariable wird er automatisch vor den Endtext gesetzt' },
+  { key: '{{skonto_prozent}}', label: 'Skonto %', desc: 'Skontosatz' },
+  { key: '{{skonto_datum}}', label: 'Skonto bis', desc: 'Datum der Skontofrist' },
+  { key: '{{skonto_betrag}}', label: 'Skontobetrag', desc: 'Abzugsbetrag in Euro' },
+  { key: '{{zahlbetrag_mit_skonto}}', label: 'Zahlbetrag mit Skonto', desc: 'Rechnungsbetrag abzüglich Skonto' },
 ]
 
 const conditionalExamples = [
   '{{#if vorname}}Hallo {{vorname}},{{/if}}',
   '{{#if (eq zahlungsart "Überweisung")}}Bitte überweisen Sie den Betrag.{{/if}}',
   '{{#if (gt zahlungsziel_in_tagen 14)}}Vielen Dank für Ihre Zahlung innerhalb des erweiterten Zahlungsziels.{{/if}}',
+  '{{#if skonto_prozent}}Bei Zahlung bis {{skonto_datum}} ziehen Sie bitte {{skonto_prozent}} % Skonto ab.{{/if}}',
 ]
 
 // --- Shortcuts ---