Overdue Invoice Interest Calculator

Estimate interest for late invoice payments using simple interest or daily compounding. For contract or statutory rates, always verify the applicable rate in your jurisdiction.

When to use this calculator

Use it when an invoice is overdue and you need a quick estimate of the interest accrued between two dates. This is useful for freelancers, agencies, and small businesses.

Tip: If you have a contract rate, use it. Otherwise use a statutory rate for late payment (varies by country).

Results

Days overdue
Interest
Total
How it’s calculated

FAQ

What if I don’t know the correct rate?

Use the contract rate if available. If not, search for the statutory late payment interest rate in your country and apply it here.

Is this legal advice?

No. This tool provides an estimate only.


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