Invoice late fee calculator

This invoice late fee calculator applies a monthly late fee rate to an overdue invoice for the days it is past due, and totals what your overdue invoices owe, fees included.

Enter the invoice

Invoice amount

The balance on the invoice.

Monthly late fee rate

18% a year at this monthly rate. Check your state’s limit.

1.5%

Days past due

Days since the payment was due. Or slide along the ruler.

days

Late feeOn the ruler ↓$37.50

The fee so farIf it stays unpaid+$37.50 every 30 days, not compounded

Slide along the ruler to change the days.

What your overdue invoices owe

Overdue invoices

How many invoices are overdue at about this amount.

invoices

As billed

$12,500.00With fees

$12,687.50

+$187.50 in late fees

5 invoices, one segment each · to scale

Overdue balance (5 invoices): $12,500.00
Late fees owed to you: $187.50
Total owed, fees included: $12,687.50

With 5 overdue invoices of $2,500.00, 30 days past due at 1.5% a month, you are owed $12,687.50 — $187.50 of it in fees.

Questions

Late fees on invoices, answered

Can contractors charge late fees on invoices?

Generally yes, when the customer agreed to the terms in writing before the work began — put the late fee on the estimate or contract and again on the invoice. States set their own limits on late fees and interest, and the rules differ, so check your state’s before you choose a rate.

How is a late fee calculated?

This calculator uses a monthly percentage, prorated by day: invoice amount × monthly rate × (days past due ÷ 30). At 1.5% a month, a $2,500 invoice 30 days late owes $37.50, and a $1,000 invoice owes $15. Some businesses use a flat fee per late invoice instead; either works if it is stated up front and applied the same way every time.

How do I add a late fee to my invoices?

Put one plain line on every invoice and estimate, where the customer will see it: “A late fee of 1.5% per month will be applied to balances not paid within 30 days.” Use your own rate and terms, and keep them the same on every document.

TermsFoot of the invoice

A late fee of 1.5% per month will be applied to balances not paid within 30 days.

At the rate set above.

Put it on the estimate and again on the invoice, and keep it the same on every document.

A sample invoice on its due date, day 0 on the ruler. Left unpaid 30 days at 1.5% a month, its $150.00 would owe $2.25 more.

In Business Genie

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Business Genie invoices carry a button to pay online — by card, Apple Pay, PayPal, Venmo or Cash App — so the customer can settle the bill the day it arrives. Business Genie also syncs with QuickBooks Online.

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