Calculate statutory or contractual interest and compensation on a late invoice.
Statutory late payment regimes typically allow interest at a margin above a reference rate plus a fixed compensation sum. On small invoices the fixed sum can exceed the interest itself. The entitlement usually exists automatically without needing a contractual term, which many suppliers do not realise they can claim.
Late Payment Interest
Interest = amount × (base rate + statutory margin) × days ÷ 365, plus fixed compensation
Late payment entitlements vary by jurisdiction and contract, and statutory rates change. This is a general illustration, not legal advice. Confirm the applicable rate and entitlement before claiming, and seek legal advice for disputed debts.
Interest = amount × (base rate + statutory margin) × days ÷ 365, plus fixed compensation Statutory late payment regimes typically allow interest at a margin above a reference rate plus a fixed compensation sum. On small invoices the fixed sum can exceed the interest itself.
The entitlement usually exists automatically without needing a contractual term, which many suppliers do not realise they can claim.
This calculator takes 5 inputs: Invoice amount, Days overdue, Reference base rate, Statutory margin above base, Fixed compensation amount. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.