Most unpaid invoices aren't refusals — they're forgotten. The client meant to pay, the invoice got buried, life happened. A polite reminder usually solves it. The trick is sending the right reminder at the right time.
Here's the cadence I use for my own freelance work. Three emails. Each one is calm but each one moves the conversation forward.
Day 1 overdue — the gentle nudge
One day past the due date. Assume forgetfulness, not malice. Keep it short and friendly. Don't apologize for sending it — you're owed money.
Email template — day 1
Subject: Invoice INV-0042 — quick reminder
Hi [Name],
Hope you're well. Just a quick reminder that invoice INV-0042 for $X,XXX was due yesterday. I've attached another copy in case the original got lost in the inbox.
No worries if it's already in motion — just let me know.
Thanks,
[Your name]
Day 7 overdue — slightly firmer
A week in. They've had a friendly reminder; if it's still unpaid, something else is going on. Maybe the wrong AP contact got it; maybe their internal approval is stuck. Time to find out.
Email template — day 7
Subject: Invoice INV-0042 — now 7 days overdue
Hi [Name],
Following up on invoice INV-0042 (attached), now a week past due. Could you let me know where it stands? If there's another contact at [Company] who handles AP, I'm happy to email them directly.
If there's an issue with the invoice itself, please tell me and I'll get it sorted today.
Thanks,
[Your name]
The "is there another contact" bit usually unsticks things — corporate AP teams don't mind getting CC'd directly, and it gets your invoice off a single overloaded person's desk.
Day 30 overdue — escalation
A month past due. Two reminders have gone unanswered. This is where you stop being deferential and state the consequences clearly. Still professional, but no longer apologetic.
Email template — day 30
Subject: Invoice INV-0042 — 30 days overdue, action required
Hi [Name],
Invoice INV-0042 is now 30 days past due. I've sent two prior reminders without response.
Per the terms of the engagement, late fees of 1.5% per month begin accruing on the outstanding balance starting today.
I'd like to resolve this before it escalates further. Please confirm payment timeline by [date — 5 business days out], or let me know if there's an outstanding issue I need to address.
If I don't hear back, I'll need to pause any current work and refer the matter to collections.
Best,
[Your name]
When to actually charge the late fee
Late fees are usually more useful as a signal than as a revenue stream. The mere mention in the day-30 email is what gets attention. Most clients pay before the fee is actually assessed.
But charge it when:
- Your contract or terms explicitly authorized it (the only legal way).
- The client has been ignoring you for a while.
- You don't expect to work with them again and want to make the cost of waiting tangible.
Don't charge it on the first overdue invoice with a long-standing client. The relationship is worth more than the percentage.
When to escalate beyond email
Phone call at day 14-21. If two emails haven't worked, pick up the phone. It's harder to ignore a voice. Keep it brief and friendly — ask if there's an issue, when payment will arrive.
Pause ongoing work at day 30. If they have current projects with you, this is the leverage. Don't threaten — just calmly stop. "I'll pause work on the [project] until INV-0042 is settled." Often this is the unlock.
Collections agency at day 60-90. Most agencies take 25-40% of recovered amount. For small invoices it's not worth it. For anything over $2,000, it usually is. Agencies often recover within weeks.
Small claims court at day 90+. Cheap, doesn't require a lawyer, but takes time and a court appearance. Worth it for amounts under $5-10k where you have clear documentation.
Prevention is cheaper than collection
All of this is recoverable but it's also avoidable. Three practices that nearly eliminate the problem:
1. Net 14 instead of Net 30 with new clients. Less time to forget. After 6 months of on-time payment, you can switch them to Net 30 as a courtesy.
2. 50% upfront for projects over $2k. If they balk at paying half on signing, they'll balk at paying the second half too. Better to find out before you do the work.
3. Auto-pay for retainer clients. Stripe Subscriptions, GoCardless, or whatever your bank supports. Removes the need to be paid each month — you just are.