Invoice Late Fee — What Does a Late Payer Owe You?

Amount × daily rate × days late = interest. Includes a 1%/month preset, custom daily rates, and the escalating email sequence that actually gets invoices paid.

Quick answer: Free late invoice calculator: invoice amount, due date and daily rate — interest owed, running total by month, and a polite-but-firm chase email template.

Invoice $ Days late Rate

–Interest owed

–Total now due

–Accruing per day

–Effective APR

Escalation sequence:
1. Day 1 late — friendly nudge ("just bumping this in case it slipped")
2. Day 14 — firm reminder, state the fee clause
3. Day 30 — final notice: fee attached, payment due in 7 days or collections next

Script for step 2: "Hi [name], invoice #[x] for $[y] was due [date] and is now 14 days overdue. Per our terms, a late fee of 1%/month now applies ($[z] and growing). Could you confirm the payment date this week?"

How to use

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About this tool

Late fees are usually set in your terms: 1–1.5% per month (≈12–18% APR) is standard and enforceable when agreed upfront. This calculator computes the interest for any overdue invoice, shows the monthly breakdown, and includes the 3-step chase sequence (polite nudge → firm reminder → final-with-fee) — because the fee works best as leverage you actually apply.

FAQ

Can I charge interest if my invoice didn't mention it?

Only if agreed in the contract/terms — put a late-fee clause in every future invoice; without it you're limited to collections pressure.

What is statutory interest for businesses?

In the UK, business-to-business debt carries statutory interest (8% + Bank of England base) even without a clause; US varies by state and contract.

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Invoice Late Fee — What Does a Late Payer Owe You?

How to use

About this tool

FAQ

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