A late invoice payment is cash you already earned sitting in someone else’s account. This guide is for freelancers dealing with past-due invoices — what to say, when to escalate, and how late fees or interest work.
Act within days, not weeks: confirm receipt, send a clear reminder, and keep a paper trail. If your contract allows interest, calculate it with Round’s late payment interest calculator.
First 48 hours after the due date
- Check the invoice was delivered (spam, wrong AP contact).
- Resend the PDF with amount due and original due date in the subject line.
- Ask if anything is blocking payment (PO number, portal, revised bill-to).
- Log the follow-up date so you escalate on a schedule.
Reminder scripts
Day 3–7 (friendly)
“Hi {Name}, quick note that invoice {Number} for {Amount} was due {Date}. Happy to resend the PDF or update billing details if needed. Thanks!”
Day 14 (firmer)
“Following up on overdue invoice {Number} ({Amount}). Please confirm payment timing this week so we can keep the project schedule on track.”
Day 30+ (escalate)
“Invoice {Number} is {Days} days past due. Per our agreement, late fees/interest may apply after {Date}. Please pay by {NewDate} or reply with a written payment plan.”
Late fees and interest
Whether you can charge a late fee or interest depends on your contract and jurisdiction. Commercial late-payment rules in the UK/EU can include statutory interest; in the US, contract terms usually govern. Never invent rates after the fact — put them in the agreement before work starts (contract generator). For UK commercial late payment context, see GOV.UK late commercial payments.
| Approach | When to use | Watch-outs |
|---|---|---|
| Flat late fee | Simple B2B terms | Must be disclosed in contract |
| Interest % p.a. | Longer overdue balances | Use lawful/statutory rates |
| Pause work | Ongoing retainers | Communicate in writing |
| Collections / legal | Large balances only | Cost vs recovery |
How to prevent late payments
- Invoice the same day as delivery — see how to create an invoice
- Require deposits on large projects
- Put Net 15 / Net 30 and late terms in the contract
- Use software that flags overdue automatically
Next step
Send the reminder you have been avoiding, calculate any lawful interest, and move overdue tracking out of your inbox. Cashflow improves faster from process than from perfect PDF design.