Free calculator
Late Fee Calculator
Enter the invoice amount, due date, and your late-fee policy to calculate the days overdue, the late fee or interest owed, and the new total your client should pay.
Defaults to today.
Days after the due date before a late fee applies. Leave at 0 for none.
Charged once on the overdue balance. Many freelancers use 1.5–5%.
Days overdue
15
past grace period
Late fee
$15.00
New total owed
$1,015.00
invoice amount + late fee
This is an estimate for planning and reminders. Late-fee and interest limits are set by your contract and by local law — some jurisdictions cap the rate you can charge. Confirm your terms and applicable regulations before billing a late fee.
How to charge a late fee the right way
A late fee only holds up if it's agreed in advance. State your payment terms, the grace period, and the late-fee rate in your contract and on every invoice. When an invoice goes overdue, this calculator shows the days past due, the fee owed, and the new total — so your follow-up is accurate and defensible.
Flat fee vs. interest
A flat fee is simple and predictable for small invoices. A monthly or annual interest rate scales with how late and how large the balance is, which is fairer on bigger invoices. Pick whichever your contract specifies.
Know your legal limits
Many jurisdictions cap the interest rate you can charge on overdue invoices. Before applying a fee, check the maximum allowed where you and your client are based, and keep the policy reasonable.
FAQ
Frequently asked questions
It depends on your contract and local law. A common approach is 1.5% per month (about 18% per year) or a one-time percentage of the balance. Some regions cap the maximum interest you can charge, so confirm the legal limit where you operate before billing.
For a one-time percentage, we multiply the invoice amount by your rate. For monthly or annual interest, we prorate the rate by the number of days the invoice is overdue beyond any grace period. A flat fee is added once the invoice becomes overdue.
A grace period is the number of days you allow after the due date before a late fee kicks in — for example, 'net 30 plus a 5-day grace period.' Set it here so the days-overdue count only includes time past the grace window.
Not necessarily. A clear late-fee policy in your contract encourages on-time payment, but you can choose to waive it for good clients. Even sending a reminder that mentions the policy often gets you paid faster.
Yes. Manually tracking due dates is error-prone. Agiled can flag overdue invoices, apply your late-fee rules, and send automatic payment reminders so you don't have to chase clients by hand.
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Stop chasing overdue invoices
Agiled flags overdue invoices, applies your late-fee policy, and sends automatic reminders until you're paid — so you spend less time chasing and more time working. Free plan, no card required.