---
title: "Invoice late fee or statement interest: which to charge?"
description: "An invoice late fee charges each overdue invoice. Statement interest charges the whole balance. How to pick the right model for your ledger, with a calculator."
url: https://www.paidnice.com/blog/invoice-late-fee-vs-statement-interest
---

# Invoice late fee or statement interest: which to charge on overdue accounts

Written by

Denym Bird
Expert verified

Co-founder & CEO of Paidnice

Denym contrasted an invoice late fee with statement interest on the same overdue balance, including a calculator, the admin cost of each, and what the customer sees.

Reviewed by Jack Daffron

Co-founder of Paidnice

Updated Nov 11, 2026 · 11 min

## Summary

An invoice late fee charges each overdue invoice on its own, and statement interest charges a customer's whole overdue balance as one figure. Pick by the shape of the ledger: a few large invoices suit a late fee, many small rolling invoices suit statement interest, and the two can run on different customer groups at once.

- **Invoice late fee:** A flat amount or percentage added to one overdue invoice, simple to explain, and the same charge whether the invoice is 5 or 200 days late.
- **Statement interest:** A daily-accruing charge on the whole overdue balance, raised once a month, that grows every day the account stays unpaid.
- **Paidnice:** Paidnice runs both charge types, each on its own customer group, and works statement interest out on the day the policy runs, so the figure the customer reads is current.

Both charges are leverage: the invoice with a visible, growing cost is the one that moves up the customer's payment run.

## What is the difference between an invoice late fee and statement interest?

An invoice late fee attaches to a single overdue invoice, so ten overdue invoices produce ten fees. Statement interest attaches to the customer, works out the interest accrued across everything they owe, and raises one charge for the period. NetSuite sends statements through a manual run or a scheduled workflow, set out in [NetSuite customer statements](https://www.paidnice.com/blog/netsuite-customer-statements).

**An invoice late fee** attaches to a single overdue invoice. Invoice 1001 is late, so invoice 1001 gets a fee. Ten overdue invoices produce ten fees. It is usually set as a flat percentage of the invoice, or a fixed amount.

**Statement interest** attaches to the customer, not the invoice. It looks at everything they owe you, works out the interest that has accrued across the whole balance, and raises one charge for the period. Ten overdue invoices still produce one charge.

Neither is more legitimate than the other. In the UK the statutory regime actually uses both at once: daily interest on the debt, plus a fixed sum per invoice. Our [UK late payment fees guide](https://www.paidnice.com/blog/late-payment-fees-uk) has those rates in full.

## How we compared an invoice late fee and statement interest

We compared the two charges on five questions. Each question is a section of this post. We give no weights, because the right model depends on how your ledger looks.

- **What each charges on the same balance:** the calculator below. Inputs: three invoices totalling £2,250, a 10% fee, and 18% a year interest accruing daily from each invoice's own due date.
- **How each behaves as an invoice ages:** the daily interest formula in this post, set against a fee fixed on the invoice value.
- **Which ledger each suits:** the table in the choice section. This is our recommendation, based on how the debt arrives.
- **What the customer and your team handle:** whether the charge reaches the customer's payables system, and how many charges you may have to reverse. This is our own assessment.
- **Legal basis by market:** the market table, from the [Late Payment of Commercial Debts (Interest) Act 1998](https://www.legislation.gov.uk/ukpga/1998/20/contents) and [Directive 2011/7/EU](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex%3A32011L0007), and from contract law where the right is contractual.

## How much does each one charge on the same balance?

On three overdue invoices totalling £2,250, a 10% invoice late fee charges £225 across three separate charges, and statement interest at 18% a year charges £53.63 as one charge. Change the numbers in the calculator to match your own ledger.

Invoice late fees or statement interest: the same balance, both ways

Invoice 1 amount (£)
Days overdue
Invoice 2 amount (£)
Days overdue
Invoice 3 amount (£)
Days overdue

Three overdue invoices: **£1,000 at 60 days**, **£500 at 30 days** and **£750 at 45 days**.

**As invoice late fees at 10%**, that is £100, £50 and £75. **£225 in total, across three separate charges.**

**As statement interest at 18% a year**, each invoice accrues daily from its own due date: £29.59 on the first, £7.40 on the second, £16.64 on the third. **£53.63 in total, as one charge.**

Same ledger. Same day. A four-fold difference, and three things to waive instead of one.

## Why does a flat late fee ignore how late the invoice is?

A percentage-based invoice late fee is the same charge on an invoice 5 days late as on one 200 days late, because it is set on the invoice value, not on time. Statement interest grows every day the balance sits there.

On a barely late invoice the flat fee looks punitive. On a very late one it looks like a rounding error, and the customer has no reason to pay this week rather than next.

**Statement interest cares about nothing else.** It grows every day. A customer watching a balance climb has a reason to act today, and a supplier who does nothing still accrues a claim.

> A flat late fee is a one-off penalty for crossing a line. Statement interest is a running cost for staying over it. Only one of those gets more persuasive the longer it is ignored.

That is why a flat fee works best as a sharp early signal on a small number of invoices, and interest works best on an account that has been drifting for months.

## Which should you choose: a late fee or statement interest?

Choose an invoice late fee when customers owe one or two invoices at a time, and statement interest when a customer runs a rolling ledger of many small invoices. Look at how the debt arrives, not at its size.

| Your ledger looks like | Charge | Why |
| --- | --- | --- |
| A handful of large invoices, one or two overdue at a time | **Invoice late fee** | The fee names the invoice. The customer knows exactly which one to pay. |
| Many small invoices, billed weekly or monthly, rolling | **Statement interest** | One monthly charge is explainable. Thirty is an argument. |
| Retainers or subscriptions on the same date each month | **Statement interest** | The balance is the relationship. Charging per invoice fragments it. |
| Project work with milestone invoices | **Invoice late fee** | Each milestone is its own negotiation, so each fee should be too. |
| A long-overdue account you are close to escalating | **Statement interest** | You need one growing number for a letter before action, not thirty small ones. |

The two can run at the same time on different customer groups, and on most ledgers they should: statement interest on accounts with a rolling balance, invoice late fees on accounts that owe you one thing at a time. Splitting by behavior instead is covered in [running different late fee policies for different customers](https://www.paidnice.com/blog/different-late-fee-policies-for-different-customers). Do not apply both to the same invoice, which is the fastest way to turn a routine charge into a dispute.

## How do you charge interest on an overdue invoice?

To charge interest on an overdue invoice, state the rate in your payment terms, calculate it daily from the due date, raise it as a real invoice or a statement charge in your ledger, tell the customer with the figures itemized, and cancel it if the original is paid by a stated date.

1. **Put the rate in the terms** before the invoice is raised. In the UK the statutory rate of Bank of England base rate plus 8% applies without a clause. Everywhere else the clause is the basis of the charge.
2. **Calculate it daily.** Invoice value, times the annual rate, divided by 365, times the days overdue. A £1,000 invoice at 11.75% accrues 32p a day.
3. **Raise it on the ledger**, as a fee invoice or a statement interest charge, so it enters the customer's payables system and their payment run.
4. **Notify the customer** with the interest, any fixed sum, the new balance and the date by which paying the original cancels the charge.
5. **Waive on payment** of the original inside the window, with a credit note against the fee invoice, and keep the record.

## What does the customer see on the other side?

Whichever model you choose, the charge only works if it reaches the customer's accounts payable system. That means it has to be a real invoice on your ledger, not a note on a statement.

A posted invoice lands in their aged payables, their approval queue and their next payment run, and it can be settled through a [customer payment portal](https://www.paidnice.com/blog/what-is-a-customer-payment-portal) like anything else. A number that exists only inside your software lands nowhere, because the person on the other side cannot pay something that was never invoiced.

💡 Paidnice insight

The most common reason a late fee gets ignored is not that the customer refused it. It is that it never entered their system as something payable. If your fee is not an invoice, it is a threat. If it is an invoice, it is a debt.

The two models look different from their side, too. An invoice late fee arrives as a small invoice they can match to an original. Statement interest arrives as a charge against the account, which is cleaner to read but harder for a strict AP process to match to a purchase order. That is the limitation of the statement model, and it is worth knowing before you switch a large customer onto it. What the customer reads when the charge lands is covered in [how to tell a customer you are charging a late fee](https://www.paidnice.com/blog/late-fee-email-to-customer).

## What does each one cost you in admin?

Thirty invoice late fees in a month is thirty charges to explain, thirty to reverse, and thirty credit notes at year end. One statement interest charge is one of each.

Most businesses apply a late fee and then [cancel it once the customer settles](https://www.paidnice.com/blog/waiving-late-payment-fees). That is the right way to run it. It also means every fee you raise is a fee you may have to reverse.

If you are choosing between models and the numbers are close, the admin is the tiebreaker. Either way, what matters in the end is [what it does to your average wait for payment](https://www.paidnice.com/blog/dso-calculation-formula), not what the charge collects.

## Can you legally charge interest on overdue invoices?

Yes. In the UK and the EU the right to charge interest on overdue business invoices is statutory and automatic. Almost everywhere else it is contractual, so the right is established by your payment terms and tested under contract law if the customer disputes it. In the US, 13 states and DC also set a limit that can reach a business invoice, listed in our [guide to maximum late fees by state](https://www.paidnice.com/blog/late-fee-laws-by-all-us-states).

| Market | Basis | What it means for the model you pick |
| --- | --- | --- |
| **UK** | Statutory, automatic on B2B | Both models are built in: daily interest at base rate plus 8%, plus a fixed sum of £40, £70 or £100 per invoice. |
| **EU** | Statutory ([Directive 2011/7/EU](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex%3A32011L0007)) | ECB reference rate plus at least 8 points, plus €40 minimum per invoice. Same shape as the UK. |
| **US** | State by state, usury caps | Typically 1% to 1.5% a month, which is an interest model by default. |
| **Australia, New Zealand** | Contractual | No statutory B2B rate. Whatever your terms say, so both models are available. |
| **Canada** | Contractual, federal and provincial variation | State the annual equivalent rate in your terms, not just a monthly percentage. |
| **South Africa** | Statutory backstop | Prescribed Rate of Interest Act sets a fallback, 10.50% from July 2026 and 10.75% from November 2026. An interest model fits it naturally. |
| **Singapore** | Common law, and the only one of these markets still applying the older genuine pre-estimate of loss test | The charge must be a genuine pre-estimate of loss, not a punishment. |

Watch the penalty rule

The penalty rule applies wherever you rely on your own contract rather than a statutory right, and that includes the UK. Statutory interest cannot be a penalty because it comes from the Act. A rate you set yourself can be struck down anywhere if it is out of all proportion to your legitimate interest in being paid on time.

That is where the flat-fee model carries more risk than interest. A large flat percentage on an invoice only a few days late is hard to defend as proportionate. Interest, which scales with the delay, is easier to justify.

In every contractual market, the clause has to exist before the invoice does. Our [late fee policy wording examples](https://www.paidnice.com/blog/late-fee-policy-wording-examples) and [payment terms templates](https://www.paidnice.com/blog/payment-terms-and-conditions-templates) cover the wording.

## How Paidnice does this, and how simple it is

Paidnice sits on top of [Xero](https://www.paidnice.com/xero/add-late-fees) or [QuickBooks Online](https://www.paidnice.com/quickbooks/add-late-fees) and offers both charge types on the same customer group, so you are not picking a product to fit a model. Xero has no native interest feature: the request "Add interest to late invoices" has been on Xero's product ideas board since 29 March 2012, has 1,114 votes, and Xero's last response on 7 July 2025 states there are no committed plans.

![A Paidnice statement interest policy at 1.5 percent a month on balances over 30 days overdue, with the charge type, minimum overdue age and the compounding toggle numbered](https://www.paidnice.com/images/blog/late-fee-policy-wording-examples-interest.png)

- **Add an invoice late fee, or a statement interest charge, or both.** They run side by side on different customer groups (never both on one group), and each one is set once rather than per invoice.
- **Set the rate the way your market works.** Turn on the Bank of England base rate toggle and choose whether to lock the rate for each six-month period, as the Act sets it (the rate in force on 30 June or 31 December applies for the next six months), or to follow the base rate as it changes. Outside the UK, set your own annual rate, and add a fixed amount line for a compensation or admin fee.
- **Every fee is raised as a real invoice in your ledger**, as a draft you approve or posted automatically, so it reaches the customer's payables system rather than sitting in a report.
- **Statement interest is worked out when the interest policy runs**. Schedule it just before the statement, and the [automated customer statement](https://www.paidnice.com/automated-customer-statements) the customer opens shows the new charge. An interest invoice raised manually is stale within a week.
- **Waiving is one action, not a reconciliation job**, and if the customer has credit on their account the charge is calculated on the net balance rather than the gross.

Setting it up is one policy on one customer group. Most people start with a single group, watch it for a month, then split it.

Just want the number?

Use the [advanced late payment interest calculator](https://www.paidnice.com/late-payment-interest-calculator) for multiple invoices and several calculation methods, or the [UK statutory interest calculator](https://www.paidnice.com/uk/statutory-interest-calculator) for the current Bank of England figure.

## Common questions

**How much interest should I charge on overdue invoices?** In the UK, the statutory rate: Bank of England base rate plus 8%, which is 11.75% a year for invoices overdue by 31 December 2026 (base 3.75% on 30 June 2026), and do not charge more under the statutory route. Elsewhere 1% to 1.5% a month is typical, stated as an annual rate in the terms, and a court can strike out a rate that is out of all proportion to your interest in being paid.

**Can I charge both an invoice late fee and statement interest?** Yes, on different customers. Not on the same invoice at the same time. UK statutory charges are the exception, because the fixed compensation sum and the daily interest are designed to work together.

**Which one makes more money?** On a short delay, usually the flat invoice fee. On a long one, interest overtakes it and keeps going. But the goal is a paid invoice, not fee income, and the model that gets paid fastest is the one your customer can understand.

**Does statement interest show on a customer statement?** It should. Neither Xero nor QuickBooks can calculate it on a statement by themselves, which is covered in [late payment interest on customer statements](https://www.paidnice.com/blog/late-payment-interest-on-statements).

**Is a late fee subject to VAT?** UK statutory interest and compensation are outside the scope of VAT, so they should be raised with no tax rather than at a zero rate. Treatment differs by market, and [how to account for late fees](https://www.paidnice.com/blog/how-to-account-for-late-fees) covers it.

**What if the customer disputes the invoice?** Do not apply either charge to a genuinely disputed invoice. Resolve the dispute first, then resume. A fee on a disputed invoice hands the customer a reason to stop talking about the debt.

## Paidnice features in this article

- [**Customer statements** Sends branded customer statements on your schedule, with one button to pay.](https://www.paidnice.com/automated-customer-statements)

## 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.

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