What Late Fee Can a Freelancer Charge for Overdue Invoices?

A late fee is not you being difficult. It is the standard, slightly boring mechanism that gives a client a reason to pay you on time instead of last. Almost every professional invoice has one, and yours should too.

If you are wondering what rate is fair to put in your contract, here is the benchmark.

What rate is normal

The figure you will see most often is 1.5% per month on the unpaid balance, which works out to roughly 18% a year. Some freelancers use 1%, some go to 2%. The exact number matters less than having one at all, because a fee that exists changes behaviour and a fee that does not exist changes nothing.

Keep it as a percentage of the outstanding amount rather than a flat "50 late", so the consequence scales with the size of the invoice.

When the fee should kick in

A late fee starts when the invoice is genuinely overdue, which means after the payment term you agreed. If you are on Net 30, the fee begins on day 31, not the moment you hit send. That is why your payment term and your late fee are really one system: the term sets the deadline, the fee enforces it. If you have not pinned down that term yet, start with net 30 vs net 60.

What the law already gives you

Even if your contract is silent, you may not be empty-handed. In the UK, the Late Payment of Commercial Debts rules let you charge statutory interest at the Bank of England base rate plus 8% on overdue business-to-business invoices, plus a fixed recovery fee. That is a genuine floor, not a bluff.

Other places have their own versions and the numbers differ, so treat the UK figure as one example rather than a universal rate. The point holds everywhere: charging interest on a late invoice is a normal, expected part of doing business, not an act of aggression.

The clause that gives your deadline teeth

The trap: the contract has no late-payment clause at all, so a client who pays 60 days late faces exactly the same bill as one who pays on time. There is no reason to hurry, so many will not.

The fair version: "Invoices unpaid after the due date accrue a late fee of 1.5% per month on the outstanding balance."

One sentence turns your due date from a polite suggestion into a real deadline. For the full set of terms worth checking before you sign, see the freelancer's contract benchmark.

None of this is legal advice, and the specifics differ across the US, UK, and EU. But a late fee in the region of 1.5% a month is standard, and including one is expected.