Invoice is not paid: how to calculate default interest from July 2026

The basic rate under section 247 BGB (German Civil Code) has been 1.52% since 2026-07-01; it was previously 1.27%. Statutory default interest is therefore generally 6.52% per year under section 288(1) BGB and 10.52% for payment claims arising from transactions in which no consumer participates under section 288(2) BGB. Contractual arrangements and the actual start of default must be checked separately. For the specific issue “how to calculate default interest from July 2026”, this requirement should be recorded in the review note with its date and supporting evidence.

For “how to calculate default interest from July 2026”, the starting point is not the reminder stage but a verified set of facts. The reviewer records the legal basis of the claim, contracting party, amount, due date, receipt and payments before drawing a legal or operational conclusion. In “how to calculate default interest from July 2026”, this control determines whether the standard workflow applies or an individual review is required.

Under section 286 BGB (German Civil Code), default generally requires a due obligation and a reminder sent after the due date. A reminder is unnecessary, for example, where a calendar date for payment was agreed, the debtor seriously and finally refuses payment, or the statutory 30-day rule applies. For consumers, that 30-day rule requires a specific notice in the invoice or payment statement. Default does not arise where the debtor is not responsible for the delay. For “how to calculate default interest from July 2026”, the workflow should continue only after ownership, deadline and the exception route are clearly set in the system.

The rule should not exist only in a manual. The system should define a trigger, case owner, deadline and escalation path, making it clear why the case was processed, paused or transferred. For “how to calculate default interest from July 2026”, quality control should reconcile the balance and underlying entries once more against the original evidence.

The standard daily formula is principal multiplied by the annual interest rate multiplied by the number of default days, divided by 365. If the German basic rate changes on 1 January or 1 July, the periods must be calculated separately. Interest does not automatically start on the invoice date; it starts on the legally established date of default. The statement should separately show principal, interest period, rate, days and subtotal. Payments and credit notes must be reflected using their actual value date. In “how to calculate default interest from July 2026”, this control determines whether the standard workflow applies or an individual review is required.

For larger portfolios, apply the rule consistently while allowing justified exceptions. Defined thresholds, a documented exception route and sample controls help prevent automation from producing factually incorrect measures. The outcome for “how to calculate default interest from July 2026” should record the current balance, next date, reason for the decision and responsible person. When an invoice remains unpaid, the amount, due date and receipt should be verified before any escalation.

Where a payment is insufficient to discharge the entire debt, section 367 BGB (German Civil Code) generally applies unless an effective different allocation governs: costs first, then interest and finally principal. A partial payment therefore does not necessarily reduce the interest-bearing principal immediately. Each entry should record the date, amount, payment reference and allocation sequence used. A different allocation stated by the debtor should not be rebooked without review; its legal effect depends on the circumstances. For “how to calculate default interest from July 2026”, quality control should reconcile the balance and underlying entries once more against the original evidence.

A common mistake is to infer default directly from an open balance. Corrections, counter-rights and receipt issues must be checked first, and calculations should allow a third party to reconstruct every amount and period. For the specific issue “how to calculate default interest from July 2026”, this requirement should be recorded in the review note with its date and supporting evidence.

Before any reminder or handover, the creditor should reconcile the creditor and debtor identities, contract, performance, invoice amount, due date, payments, credit notes and objections. The company name and legal form must match the actual contracting party. For ongoing contracts, termination, term and billing period must be checked. Only the balance remaining after all payments and credits may be pursued. A short internal approval step prevents non-existent claims, duplicate handling and unnecessary costs. The outcome for “how to calculate default interest from July 2026” should record the current balance, next date, reason for the decision and responsible person.

The article therefore leads to a reviewable decision rather than a blanket measure. Once the claim and evidence are clear, Fortis Inkasso GmbH & Co. KG can take the next out-of-court step; objections should first be assessed legally. For “how to calculate default interest from July 2026”, the workflow should continue only after ownership, deadline and the exception route are clearly set in the system.