How to Follow Up on an Unpaid Invoice
7 min readBy InvoodleUpdated
An unpaid invoice needs a useful next question, not a louder version of the last message. Has the client received it? Is a reference missing? Has a payment arrived that you have not recorded, or is there a dispute about the work?
Start with the current facts, ask for a clear response and keep a record of what happens. The steps below help you organise that review and prepare a message; they cannot guarantee when the client will pay.
The schedule and messages are practical examples, not automatic reminders, legal notices or a promise of payment. Fees, suspension, debt recovery and required notice periods depend on your agreement and applicable rules.
1. Agree the payment process before the work starts
Confirm the billing entity, finance contact, purchase-order requirements and invoice submission route. Ask how approval and payment runs work, then agree payment dates or milestones that fit the job. Issue the required invoice at the appropriate stage; do not delay it just to match a payment run.
If you need an advance or shorter terms, discuss them before accepting the work or changing the agreement. Do not assume that printing Net 14 on an invoice overrides an agreed Net 30 term. There is no standard deposit percentage for every client or project.
2. Check the invoice and remaining balance before following up
- Confirm the agreed due date and any relevant acceptance or invoice-receipt condition. If no date was agreed, check the applicable rules rather than inventing one.
- Match the number, billing entity, scope, currency and total to the issued copy and contract.
- Check bank or payment-provider records and update genuine payments already received.
- Ask whether the client needs a PO reference, corrected details or a copy through an approved portal.
- Check the latest reply and any query or dispute before sending another reminder.
The UK Small Business Commissioner recommends reviewing the invoice and contract, checking for errors and contacting the customer professionally. Its guidance is a useful UK starting point, not a rule that every unpaid invoice is simply an administrative delay.
3. Use a suggested manual follow-up schedule
Adapt this example to the agreement, amount, latest response and client’s process. It is not a statutory timetable, a tested optimum or a schedule Invoodle will execute. A reply or a payment should change your next step.
| Review point | Possible action | Check first |
|---|---|---|
| When issuing the invoice | Use the agreed delivery route and confirm it can be processed. | Correct recipient, reference and payment instructions. |
| Optional: a few days before the due date | Send a brief reminder if useful for this client. | The invoice is still outstanding; do not call it overdue. |
| After the due date has passed | Ask for payment status or a specific expected date. | Latest payment records, agreed terms and any dispute. |
| After a promised response or payment date passes | Refer to the previous reply and ask for an update. | Whether a payment is in transit or a query remains unanswered. |
| If the issue remains unresolved | Review a payment plan, dispute support or professional advice. | Relevant contract, notice rules, costs and recovery options. |
Keep follow-ups proportionate and relevant. Repeated messages while a finance contact is answering a documented query are unlikely to clarify the issue.
4. Start with a friendly payment reminder
This read-only example uses the same fictional invoice as the freelance checklist: $850.00 USD total, $200.00 USD recorded as received and $650.00 USD remaining, due 31 October 2026. It does not claim the invoice is overdue on the date you read this page. The body comes from Invoodle’s reminder builder.
Example subject: Payment reminder: INV-2026-0044
Hi Example Client, A friendly reminder about the outstanding balance of $650.00 for invoice INV-2026-0044. Due date: 2026-10-31. We have recorded $200.00 received so far. Please let me know if you have already paid or need any details. Thank you, Example Design Studio
Review the balance, date and recipient before adapting the message. Add the agreed payment instructions or attach the issued invoice when needed. Do not assume a PDF is attached merely because your email app opened.
5. Make a later reminder direct and factual
If a first message has not resolved the issue, use the firmer starting text below and edit it for the actual exchange. You can add a request for an expected payment date or ask which specific query is preventing approval. Do not suggest legal action or fees you have not reviewed.
Example subject: Payment reminder: INV-2026-0044
Hi Example Client, Please arrange payment of the outstanding balance of $650.00 for invoice INV-2026-0044. Due date: 2026-10-31. We have recorded $200.00 received so far. Please let me know if you have already paid or need any details. Thank you, Example Design Studio
The firmer template changes the wording; it does not establish that a debt is legally overdue, calculate interest or create a formal demand. If the client says payment has been made, check the reference and receiving records before sending another request.
6. Review late fees and interest separately
Do not add a generic monthly percentage and assume it is enforceable because it appears on a PDF. Check the contract, applicable law, transaction type and calculation basis. Contractual fees and statutory rights are different questions.
For example, GOV.UK describes statutory interest for qualifying UK commercial debts and explains that a different contractual rate affects that remedy. This is UK guidance, not a worldwide fee schedule. Check current rules before applying a charge.
Invoodle’s reminder builder does not add interest or recovery costs. If you use a calculator elsewhere in the app, its arithmetic does not establish a legal entitlement. Keep any reviewed charge and supporting calculation distinct from the original invoice balance.
Source references
7. Handle a dispute or payment difficulty with a clear record
If the client disputes the work or amount, record the issue and compare it with the agreed scope and approvals. Ask what is disputed and respond with the relevant records. A standard reminder does not resolve the underlying disagreement.
If you agree instalments, record the amounts, dates and any effect on the original terms in writing. Update actual receipts as they arrive. A promised payment is not money received, and Invoodle does not manage an agreed instalment schedule for you.
Before pausing work, terminating a contract, issuing a formal demand or using a collection process, review your contract and the local requirements. Do not assume a fixed number of days gives an automatic right to take those steps. Consider appropriate dispute support or advice.
8. Prepare reminders and track receipts in Invoodle
- Open Documents and review the invoice, its status, due date and received amount. The outstanding view excludes drafts, quotes and receipts; balances are grouped by currency.
- Use Remind on an invoice treated as sent with an outstanding balance. It can be available before the due date; availability is not proof that the payment is legally overdue.
- Choose Reset to friendly or Reset to firm, then edit the message. Reset replaces the current draft text, so retain any edits you need before using it.
- Copy the text or choose Open email or Open WhatsApp. Review the recipient and finish sending yourself. No reminder is sent automatically, and the app does not confirm delivery or read receipts.
- Append invoice link adds a regular encoded snapshot link, not an encrypted hosted link. Review what it discloses and whether the recipient has site access. The dialog will ask you to use a PDF separately if the link makes the message too long.
- After a payment, update the amount received. This is a manual record, not bank verification. Old shared snapshots do not update; send a fresh copy or link when the balance changes.
- Keep your follow-up log separately: contact date, person, delivery route, reply and next action. Invoodle does not schedule future reminders, monitor the inbox or store a conversation/delivery log.
- Export backups of browser-saved documents you need. Signing in does not automatically sync guest records across devices.
Frequently asked questions
How often should I follow up on an unpaid invoice?
Use the agreement and latest response to choose the next review point. A short, relevant reminder after a missed date may help; there is no universal seven-day schedule or guaranteed payment outcome. Resolve queries before repeating the same request.
Does Invoodle send payment reminders automatically?
No. It prepares editable text and lets you copy it or open email/WhatsApp. You choose the recipient and send it yourself. It does not schedule messages, monitor replies or confirm delivery.
Should I remind the client about the total or the remaining balance?
Check actual receipts and follow up on the remaining amount. The example invoice is USD 850 with USD 200 recorded as received, so the reminder requests USD 650. The received amount still needs external verification.
Can I add a late fee to any overdue invoice?
Do not assume so. Check the applicable contract and law, including any statutory rights and conditions. The reminder template does not calculate fees or establish entitlement.
Should I stop work as soon as an invoice is late?
Review the contract, notice requirements and circumstances before suspending or ending work. A missed payment does not make a generic pause-work instruction suitable for every agreement. Seek advice when necessary.
Review saved invoices
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