How to Calculate Invoice Late Fee
What is Invoice Late Fee?
Calculates acceptable late payment interest to incentivize timely payment without violating usury laws. Compensates for payment delays.
Step-by-Step Guide
- 1Determine invoice amount and due date
- 2Set late fee % or fixed amount
- 3Calculate: invoice × (1 + late fee %)
- 4Define days before fee applies (typically 15-30)
- 5Document in payment terms
Worked Examples
Input
$1000, 2%
Result
$20 fee
Common Mistakes to Avoid
- ✕Exceeding state usury limits (unenforceable and damages relationships)
- ✕Not including late fee in invoice clearly
Frequently Asked Questions
What late fee percentage is standard?
Typically 1-1.5% monthly (12-18% annually); must not exceed state usury limits (often 10-15% annual).
Does a late fee actually improve collections?
Yes; 15-20% improvement in on-time payment; also compensates for financing delay.
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