Late Payment Fee Calculator
Estimate simple interest and fees on an overdue invoice. Check your contract and local law before charging.
- Interest
- —
- Total fee
- —
- New balance
- —
Your numbers stay in your browser — this page sends nothing to any server. Results are estimates for planning, not financial or tax advice.
New to this? Read the guide: What to Do When a Client Pays Late — A Calm, Step-by-Step Process.
Want this as a spreadsheet?
Know exactly what came in, what went out, and who still owes you — in one tidy spreadsheet.
Freelance Income & Expense Tracker (Excel / Google Sheets)