Late payment interest
Work out interest and the flat compensation due on an unpaid business invoice.
How it works
Interest = amount × rate × days / 365. The EU statutory B2B rate is the ECB rate + 8 points, published every six months; the minimum flat compensation is €40.
Results are for guidance only and do not replace professional advice.
Worked example
With the default values:
- Invoice amount2400
- Days late45
- Annual rate (%)12
- Flat compensation40
you get:
- Total to claim€2,475.51
- Late interest€35.51
- Flat compensation€40.00
- Interest per day€0.79
Frequently asked questions
How does the “Late payment interest” tool work?
Interest = amount × rate × days / 365. The EU statutory B2B rate is the ECB rate + 8 points, published every six months; the minimum flat compensation is €40.
What do I need to enter?
Just fill in: invoice amount, days late, annual rate, flat compensation. The result updates as you type.
Can you give an example?
Invoice amount: 2400; Days late: 45; Annual rate (%): 12; Flat compensation: 40 → Total to claim: €2,475.51; Late interest: €35.51.
Is this calculator free, and is my data private?
Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.