How Much Can I Charge for Late Fees? Limits, Examples and a Free Calculator

How much can I charge for late fees?

A standard late fee on a business invoice is 1% to 2% per month of the overdue balance, or a flat $25 to $50 on smaller invoices, as long as the fee is reasonable and was in your terms before the sale. A 1.5% monthly rate works out to 18% a year, which is roughly what many business credit cards charge, so it is firm enough to motivate payment without looking predatory. For scale, the GOV.UK statutory interest example puts a £1,000 invoice at 8.5% a year at £85 of interest a year, or 23p a day.

There are two ways to structure the fee, and the best businesses use both:

Flat fee. A fixed amount, say $35, added once when an invoice goes overdue. Flat fees are simple and work best on smaller invoices, where a percentage would be too small to notice.

Percentage or interest. A percentage of the overdue amount, usually charged per month so it grows the longer the invoice stays unpaid. Percentage fees scale fairly with the size of the invoice, which makes them the right choice on larger balances.

The single rule that sits above all the numbers is that the fee must be reasonable. A late fee is meant to cover the cost and hassle of following up on payment and to discourage late payment, not to turn a profit. Invoice data shows whether late fees work for getting invoices paid on time. Set it too high and you risk it being unenforceable, challenged as a penalty, or in breach of a usury cap.

The calculator below multiplies the overdue amount by a monthly or annual rate, prorated for the days overdue, or adds a flat fee, and shows the total now due and the annualized rate.

Is it legal to charge late fees?

Yes. In almost every jurisdiction you can legally charge a late payment fee, provided three things are true: the fee is reasonable, it is disclosed in writing before the work or sale, and the customer has agreed to it. Put the late fee in your contract, your engagement terms, or on the invoice itself, and you are on solid ground.

A few limits sit on top of that:

• Usury caps. Most US states set a maximum interest rate. A late fee that pushes past your state's cap is not enforceable. Our usury laws by state guide lists the ceilings.
• Penalty rules. Courts can void a fee that looks punitive rather than compensatory (a so-called penalty clause). Staying near 1% to 2% per month keeps you clearly in compensatory territory.
• Regulated sectors. Consumer lending, healthcare, and residential rent face tighter rules than ordinary B2B invoices, and some industries have their own caps.

If you want the exact wording to make a fee enforceable, our late fee policy wording examples and payment terms and conditions templates give you clauses you can copy.

What is a typical late fee, and is 10% too much?

A typical late fee on a business invoice is 1% to 2% per month, or a flat $25 to $50, and a 10% monthly fee is too much. The 1% to 2% range is common enough that customers recognize it as standard, which makes it easier to enforce and harder to argue with.

So is a 10% late fee too much? Usually, yes, and it depends entirely on how you apply it:

• A one-off 10% fee on a small invoice can be reasonable if it is clearly agreed in advance. On a $200 invoice, a $20 fee is not unusual.
• 10% per month is almost always too high. Over a year that is 120%, which will breach usury caps in most places and is very likely to be treated as a penalty.
• For rent, 10% usually exceeds the legal cap. Many US states limit rent late fees to around 5% of the monthly rent.

Which late fee structure should you use on a business invoice?

On a business invoice, use a flat fee under about $500, where a percentage would be trivial, and a monthly percentage above that, where it scales with the balance. A common setup is a $35 flat fee on small invoices and 1.5% per month on anything larger.

Two things make the difference between a fee on paper and a fee you actually collect. First, the terms have to be in writing and agreed up front. Second, the fee has to be applied consistently, because a fee you only sometimes charge is easy for a customer to dispute. Applying it is the half that accounting software does not solve: Xero's product idea "Add interest to late invoices" has 1,114 votes and Accepted status, was first posted on 29 March 2012, and Xero's last response was on 7 July 2025. Applied by rule rather than by memory, a late fee moves your invoice up the customer's payment queue, and that kind of consistent credit control is what helps Paidnice customers cut their average days sales outstanding by about 50% within 30 days. Paidnice adds late fees and interest to overdue invoices automatically inside Xero and QuickBooks, so the fee is applied the same way every time without you watching the clock.

What mistakes cost you money when you set a late fee?

Three choices turn a late fee into money you do not collect.

• Setting the fee at 10% a month. On a $5,000 invoice two months late, 10% a month is $1,000 ($5,000 × 0.10 × 2). A 1.5% monthly fee is $150 ($5,000 × 0.015 × 2). The $1,000 fee is the one most likely to be challenged as a penalty or to breach a state usury cap.

  Fix: stay at 1% to 2% a month, or use a flat $25 to $50 on small invoices.

• Entering a monthly rate as a yearly one. 1.5% a month is 18% a year. Entered as 1.5% a year, the fee on the same $5,000 for 60 days is about $12 ($5,000 × 0.015 × 60 ÷ 365) instead of $150, about $138 short. Fix: check the period label in the calculator above before you quote the fee.

• Waiving the fee by default. About 1 in 4 late fees is waived, and about 6 in 10 are paid in full. If you issue 20 flat fees of $35 and 1 in 4 is waived, that is about 5 fees, or $175 ($35 × 5), not collected.

  Fix: charge the fee on one rule and waive it on purpose. Source: our analysis of invoice data from over 1,000 Paidnice customers. See our late fee data.

How much can a landlord charge in late fees?

Rent late fees are capped more tightly than invoice fees. Many US states limit them to around 5% of the monthly rent, and most require a grace period, commonly about five days, before a fee can apply. Every state requires the late fee to be written into the lease; a verbal agreement is not enough.

The detail varies by state. Some states set a hard 5% cap, some pair it with a minimum dollar amount, and others simply require the fee to be a reasonable estimate of the landlord's actual costs rather than a fixed percentage. Federally subsidized housing follows its own rule of $50 or 5% of rent with a five-day grace period.

Because the cap and the grace period change from state to state, check your state's rule before setting a rent late fee. Our late fees by US state guide covers business invoices, so for rent check your state's landlord-tenant law. This section is reference only: Paidnice is built for business invoices in Xero and QuickBooks, not rent.

How much can I charge for late fees by US state?

There is no single national rate in the US. How much you can charge is governed by your state's usury cap, and across most states a late fee of 1% to 2% per month on invoices sits comfortably inside the limit. A handful of states are stricter, and a few set specific rules for particular industries.

For invoices, the practical answer is to use the typical 1% to 2% per month unless your state cap is lower. For the exact ceiling in your state, see our late fees by US state guide and the usury laws by state guide.

Outside the US, late fee rules split into two camps: the UK and EU give a statutory right to interest on late B2B payments, which applies automatically once a payment is overdue, while Australia, Canada, New Zealand, Singapore and South Africa leave it to contract, so you set a reasonable rate and write it into your terms. Each country link above goes to its own guide, and the UK statutory interest calculator and EU late payment directive calculator run the statutory figures.

How to set and enforce a late fee that gets paid

A late fee gets paid when it is in writing before the sale, announced by a reminder, applied to every overdue invoice the same way, and run by rule rather than by memory. Four steps:

Put it in writing before you need it. State the late fee in your contract, engagement letter, or invoice terms, with the amount, when it kicks in, and whether interest is simple or compound (see compound or simple interest). A fee that was never agreed is a fee you cannot collect.

Send a reminder first. You are rarely required to warn a customer, but a reminder that names the fee usually gets you paid before it applies, and it keeps the relationship intact. Automated email and SMS reminders make sure the nudge goes out on time, every time.

Apply it consistently. A fee you only charge some of the time is easy to dispute. Charging every overdue account the same way is what makes the policy credible.

Automate the whole loop. Reminders, then the late fee, then a statement, applied by rule rather than by memory. That is what Paidnice does for businesses on Xero and QuickBooks, which is how you turn a late fee policy into actual cash rather than a line in your terms.

Use a grace period. A grace period is a set number of days overdue before the fee applies, so a good customer who is two days late never sees a charge. In Paidnice it is a setting on the late fee policy, alongside the choice between simple and compounding interest.

Keep reading

• Late fees by US state
• Usury laws by state
• Late fee policy wording examples
• Payment terms and conditions templates
• Add late fees and interest with Paidnice
• Late payment interest calculator
• Late payment fees in the UK
• How to add late payment fees to invoices in Xero

Ready to stop following up manually and start charging automatically? Book a free demo with Paidnice and apply late fees, interest, and reminders to overdue invoices without lifting a finger.

This article is general information, not legal advice. Late fee rules change and vary by location and industry. For your specific situation, check the current rules in your jurisdiction or speak with a legal professional.

About the editorial team

Written by Denym Bird Co-founder & CEO of Paidnice

Denym started Paidnice in 2022 after customers paying late left his own business short on payroll. He has led it to $1 billion collected on time across more than 1 million invoices, and writes about credit control, late fees and getting paid on Xero and QuickBooks.

Reviewed by Jack Daffron Co-founder of Paidnice

Jack is a co-founder of Paidnice and has built accounting software for more than 10 years. He builds the product that sends reminders, adds late fees and takes payments for businesses on Xero, QuickBooks and ERPs such as NetSuite and Business Central.