B2B Invoice Late Fee & Interest Calculator
Calculate B2B late payment interest, recovery compensation and the total amount owed. Choose EUR, GBP, USD, PLN or enter a custom currency code and generate a ready to use payment demand letter.
Important: This calculator provides estimates for informational purposes and does not constitute legal advice or determine your legal entitlement to interest, compensation or recovery costs. Late payment rules may depend on the country, transaction type, contract, applicable law, payment terms and relevant dates. Legal rates and requirements may also change over time. Verify the result against current applicable law before relying on it in a payment demand or legal proceeding.
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B2B Late Payment Fee & Interest Calculator
Calculate statutory late interest, fixed recovery compensation (EU / UK), and generate a formal Demand Letter in seconds. 100% private & client-side.
Invoice & Agreement Details
Enter original invoice parameters and payment terms.Total Debt Breakdown
Statutory interest + recovery compensation📄 Generated Demand Letter
What is the B2B Late Payment Calculator?
B2B Late Payment Calculator helps businesses calculate potential interest and recovery costs on overdue commercial invoices.
Enter the invoice amount, relevant dates, applicable jurisdiction or interest rate and other required details to estimate the amount that may be due.
The calculator can also generate a structured Letter of Demand that you can review, edit and copy.
Calculate late payment interest
The applicable interest calculation depends on the legal framework, contract and transaction details.
For qualifying EU commercial transactions, the Late Payment Directive provides for statutory late-payment interest and a minimum fixed €40 recovery cost compensation when the relevant conditions are met. National rules implementing the directive may provide additional or higher amounts.
For qualifying UK B2B commercial debts, statutory interest is generally 8% above the Bank of England base rate, unless the contract provides a different remedy for late payment.
Add recovery cost compensation
The calculator can include applicable fixed recovery compensation alongside late payment interest.
For EU transactions, the underlying directive establishes a minimum fixed compensation of €40, while national legislation can provide higher amounts.
The exact amount should therefore be checked against the applicable national rules rather than assuming that one EU wide figure applies in every situation.
Generate a Letter of Demand
Once the calculation is complete, you can generate a structured Letter of Demand containing the relevant invoice information, overdue amount, calculated interest and applicable recovery costs.
Review the generated letter before sending it, particularly when relying on statutory rights or contractual provisions.
FAQ
Yes. In addition to EUR, GBP, USD and PLN, the calculator includes a Custom Currency option where you can enter a currency code or symbol such as CHF, CAD or NOK.
For supported statutory frameworks, the tool can apply the relevant rules and rates built into the calculator. Because commercial late payment rules can change and may depend on national law, the result should always be treated as an estimate and verified before being used in a formal claim.
You can copy and edit the generated letter, but you should review its contents and verify that the stated interest, compensation and legal basis apply to your specific transaction before sending it.
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