Late Payment Interest Calculator
Statutory interest on overdue invoices.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Total now due
- $4,944.17
- Interest accrued
- $74.17
- Daily interest
- $1.58
- Compensation fee
- $70.00
Quick answer
Late payment interest accrues daily on the overdue amount from the day after the due date.
Interest = amount × rate × days ÷ 365
How to use the Late Payment Interest Calculator
- 1Enter the unpaid invoice amount.
- 2Enter the interest rate in your terms or statute.
- 3Enter days past the due date.
Frequently asked questions
Can I charge interest without saying so?
In many jurisdictions statutory interest applies even without a contract clause.
Does interest compound?
Statutory late payment interest is usually simple, not compound.