Unpaid Invoice — What Now? (Step-by-Step + Templates) — 2026
Your invoice has not been paid. What should you do next? Complete guide on reminders, escalation, collection costs, and prevention.
Unpaid Invoice — What Now? (Step-by-Step + Templates) — 2026
Your due date has passed. Your client has not paid. What now?
Unpaid invoices are one of the most frustrating parts of freelancing. You delivered the work, but the payment does not come in. Sending reminders can feel awkward, especially with repeat clients.
This guide gives you a practical escalation plan: when to send reminders, how to escalate professionally, what costs you may charge, and how to prevent late payments in the future.
Why clients pay late
Most late payments are not deliberate non-payment.
Common reasons:
- The invoice gets buried in a busy inbox
- The client did not receive a clear payment notification
- The finance team pays in monthly runs
- There is confusion about scope or amount
- Temporary cash-flow issues
That is why you start with a friendly reminder, not legal threats.
When can you send a payment reminder?
Legally, you can send a reminder as soon as the payment term has passed.
Example:
- Invoice date: 1 February 2026
- Payment term: 30 days
- Due date: 3 March 2026
- First reminder: from 4 March 2026
In practice, most freelancers wait 3 to 7 days after the due date.
The escalation ladder: 4 steps
| Step | Timing | Tone | Additional charges |
|---|---|---|---|
| Friendly reminder | 3-7 days after due date | Polite, informal | No |
| Formal reminder | 14-21 days after due date | Professional, formal | Yes (EUR 40 + interest) |
| Final warning | 30-35 days after due date | Strict, consequence-based | Yes |
| Collection / court | 45+ days after due date | Legal | Yes |
Step 1 — Friendly payment reminder
Start friendly and assume the invoice was overlooked.
Template — Friendly reminder
Subject: Reminder invoice [invoice number]
Dear [name],
I noticed that invoice [invoice number] for EUR [amount] (due date: [date]) has not yet been paid. It may have been overlooked.
Could you please transfer the payment before [new date, e.g. within 7 days] to IBAN [your IBAN], quoting invoice number [number]?
For convenience, I have attached the invoice again.
If you have any questions or if payment has already been made, please let me know.
Kind regards,
[Your name]
Important:
- Stay polite and professional
- Reattach the original invoice
- Include a concrete new payment date
Step 2 — Formal reminder
If no payment comes in after 7-14 days, send a formal reminder. This is typically when statutory collection costs can be added.
Template — Formal reminder
Subject: Formal reminder invoice [invoice number] — payment required within 14 days
Dear [name / company name],
Despite my earlier payment reminder sent on [date], I have not yet received payment for invoice [invoice number] of EUR [amount], due on [date].
This is a formal reminder.
Please transfer EUR [amount] within 14 days of this notice to IBAN [your IBAN], quoting invoice number [number].
In accordance with Dutch law, I will charge:
- Collection costs: EUR 40.00
- Statutory interest: EUR [interest amount] (from [due date])
Total outstanding: EUR [total amount]
If payment is not received within this period, I will proceed with further legal steps, including transfer to a collection agency or court procedure.
If payment has already been made, please contact me as soon as possible.
Kind regards,
[Your name]
[Your company name]
[KvK number]
How much can you charge?
| Invoice amount | Statutory collection costs |
|---|---|
| Up to EUR 2,500 | EUR 40 |
| EUR 2,500 - EUR 5,000 | EUR 60 |
| EUR 5,000 - EUR 10,000 | EUR 90 |
| EUR 10,000 - EUR 200,000 | EUR 1,425 |
You may also charge statutory interest from the due date.
Step 3 — Final warning
If the formal reminder does not work, send a final warning and clearly state that you will escalate.
Template — Final warning
Subject: Final warning invoice [invoice number] — collection will follow
Dear [name / company name],
Despite my formal reminder dated [date], I still have not received payment for invoice [invoice number] of EUR [amount].
This is my final warning.
If full payment is not received within 7 days of this letter, I will transfer the case to a collection agency without further notice. All additional costs will be charged to you.
Outstanding amount:
- Original invoice: EUR [amount]
- Collection costs: EUR 40.00
- Statutory interest: EUR [interest amount]
- Total: EUR [total amount]
Please transfer the total to IBAN [your IBAN], quoting invoice number [number].
Kind regards,
[Your name]
[Your company name]
Step 4 — Collection agency or court
If there is still no payment, you have two options:
Option 1 — Collection agency
A collection agency takes over the case and pursues payment for you.
- Often works on no cure, no pay
- Usually costs around 10-25% of the claim
- Costs are typically recoverable from the debtor
Option 2 — Court procedure
You can apply for a payment order in court.
Choose this especially:
- For larger amounts (for example above EUR 5,000)
- If the client disputes the debt
- If you have strong supporting evidence (contract, emails, delivery proof)
How to prevent unpaid invoices
Prevention is more effective than chasing late invoices.
1. Add an iDEAL payment link
Clients who can pay immediately via a payment button usually pay significantly faster.
Read more: Send invoices with iDEAL or Wero
2. Use automatic reminders
Automate reminders so every invoice follows a sequence:
| Reminder | Timing |
|---|---|
| Friendly reminder | 3 days before due date |
| First overdue reminder | 7 days after due date |
| Second overdue reminder | 14 days after due date |
| Final reminder | 30 days after due date |
3. Use explicit due dates
Use a specific date rather than "within 30 days."
4. Ask for a deposit
For large projects or new clients, consider:
- 50% upfront, 50% on delivery
- Or milestone-based payments
5. Include suspension rights in terms
State in your terms that you may pause new work when earlier invoices remain unpaid.
Common mistakes with unpaid invoices
Waiting too long
The longer you wait, the lower your collection chances.
Starting aggressively
An aggressive first email can damage client relationships. Escalate step by step.
Charging costs too early
Collection costs should follow a proper formal reminder path.
Not keeping evidence
Save all invoices, reminders, emails, and chat messages.
Pausing work without communication
If you pause work, communicate this clearly.
Summary
Escalation ladder for unpaid invoices:
- Friendly reminder (day 3-7)
- Formal reminder (day 14-21)
- Final warning (day 30-35)
- Collection agency or court (day 45+)
Best prevention:
- Payment links (iDEAL/Wero)
- Automatic reminders
- Clear due dates and deposits
Prevent late payments with Declair →
Frequently Asked Questions
When can I send a payment reminder?
As soon as the payment term has expired.
Can I charge collection costs?
Yes, after a formal reminder process, in line with Dutch statutory rules.
Can I cancel an unpaid invoice?
No. You can issue a credit note only when appropriate and agreed.
How can I reduce unpaid invoices?
Use payment links, automatic reminders, and clear payment terms from the start.
Also read: What Must Be on an Invoice and How to Invoice as a Freelancer in the Netherlands.
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