Send a clear, specific invoice before you ask for anything
The first request for payment should be a document, not a conversation. An invoice tells the customer exactly what they owe, when it was due, and how to pay. It removes ambiguity and gives them a record to match against their own records. Send it the same day the work is done or the product ships, or on the date you agreed payment would be due.
Your invoice should include: what was delivered or performed, the amount owed, the date payment is due, your payment methods (bank transfer, check, card, PayPal, whatever you accept), and your contact information. If you have a payment portal or online system, include the link. The clearer the invoice, the fewer follow-up conversations you will need.
Keep a copy for yourself. You will need it if the payment is late or disputed.
Key Takeaways
- Send an invoice immediately after delivery or on the agreed due date, with the amount, due date, and payment methods clearly listed.
- Wait until the due date has passed before sending a reminder; a reminder before the deadline looks like pressure and damages trust.
- Your first follow-up should be a simple, neutral message asking whether they received the invoice and if they have questions about payment.
- After 7 to 10 days past due, send a second message that names the amount, the original due date, and a new deadline for payment.
- If payment is still not made after 30 days, decide whether to stop work, refer the debt to a collection agency, or write it off as a loss.
Wait for the due date to pass before you follow up
Do not send a reminder on the due date itself or the day before. That reads as impatience and can make a customer feel rushed or disrespected, even if they intended to pay on time. Let the due date arrive and pass.
If the customer pays on time, send a brief thank-you message. This reinforces the behavior and keeps the relationship positive. If they do not pay by the end of the due date, wait another 2 to 3 days before you send your first reminder. This gives them time to process the invoice and make the payment without feeling harassed.
Send a neutral first reminder asking if they received the invoice
Your first follow-up message should be short, assume nothing is wrong, and ask a simple question. Do not accuse, demand, or express frustration. A message like "Hi [Name], I wanted to check in—did you receive the invoice I sent on [date] for [amount]? Let me know if you have any questions about it" works because it opens a conversation rather than making an accusation.
Many late payments happen because the invoice was missed, went to spam, or the customer misunderstood the due date. A neutral check-in often surfaces the real problem without creating conflict. If they say they did not receive it, resend it immediately and confirm they have it.
If they say they received it but have not paid, ask whether there is a problem with the invoice itself—a math error, a misunderstanding about what was included, or a dispute about the work. Solve that problem before you ask again for money.
Send a second reminder 7 to 10 days after the due date
If you do not hear back from your first message or the customer says they will pay but does not, send a second message after 7 to 10 days have passed since the due date. This message should be more direct. Name the amount, the original due date, and ask for payment by a specific new date—usually 5 to 7 days out.
Example: "I have not yet received payment for invoice [number], dated [date], in the amount of [amount]. The original due date was [date]. Please send payment by [new date]. If there is an issue preventing payment, please let me know right away so we can work it out."
This message is firm but still professional. It shows you are tracking the debt and expect resolution. It also gives the customer a clear, final deadline and an opening to explain if something is genuinely wrong.
Decide what to do if payment is still not made after 30 days
After 30 days past the original due date, you have three main options: stop providing services or delivering products, refer the debt to a collection agency, or write it off as a loss.
Stopping work is the fastest way to get attention. If you are providing ongoing services—consulting, maintenance, hosting—pause them until payment arrives. Send a message: "I have paused [service] due to the unpaid invoice dated [date]. Service will resume once payment is received." This creates immediate pressure and often works.
Referring to a collection agency means paying a third party (usually 25 to 50 percent of what you collect) to pursue the debt on your behalf. They will contact the customer repeatedly and may report the debt to credit bureaus. This damages the customer relationship permanently but recovers some money if the customer has assets or income. Use this route only if the amount is large enough to justify the cost and you do not care about keeping the customer.
Writing it off means accepting the loss and moving on. For small amounts or customers you value, this is often the cheapest option in terms of time and stress. You can also deduct the loss as a bad debt on your taxes if you use accrual accounting.
Document every message and payment
Keep copies of your invoice, every message you send, and every response you receive. If the customer later disputes the debt or you need to pursue collection, this record proves you asked for payment and when. Save emails, screenshots of text messages, and payment confirmations.
If the customer pays late but does pay, note the date they paid. This helps you spot patterns—some customers are always late, and you may want to require payment upfront from them in the future, or stop working with them altogether.
Prevent late payment by setting clear terms upfront
The easiest way to handle late payment is to prevent it. Before you start work or ship a product, agree on payment terms in writing. State the due date, the payment methods you accept, and what happens if payment is late (a fee, suspension of service, or referral to collection).
For new customers or large amounts, consider requiring a deposit or payment upfront. For repeat customers with a good history, you can offer net-30 or net-60 terms. The key is that both of you know the expectation before work begins.
If a customer has a history of late payment, you can also require them to pay by a faster method—credit card instead of check, or ACH transfer instead of wire—so the money reaches you sooner.
Frequently Asked Questions
How long should I wait before I consider a payment truly late?
Wait until the due date has passed plus 2 to 3 days. This accounts for mail delays, processing time, and the customer's own payment schedule. After that, send your first reminder. If the due date was a Friday, do not expect payment until the following Tuesday or Wednesday.
Should I charge a late fee?
You can, but only if you stated the fee in writing before the work began. Late fees are usually 1 to 2 percent of the amount owed per month, or a flat amount like $25. Check your state's laws—some states cap late fees or require specific language in the contract. A late fee can motivate payment but may also damage the relationship, so use it only if you have a written agreement.
What if the customer says they will pay but keeps missing the deadline?
After the second missed deadline, stop accepting promises. Set a firm final date and tell them that if payment is not received by then, you will pause service or refer the debt to collection. Repeat broken promises mean the customer is either unable or unwilling to pay, and you need to protect yourself.
Can I ask for payment over the phone instead of in writing?
You can, but do not rely on it. A phone call can work for a quick check-in, but follow it up with a written message confirming what you discussed. Written records protect you if there is a dispute later. The customer may also forget what they said on the phone, but they cannot deny a message they received.
What should I do if a customer claims they already paid?
Ask them for proof—a receipt, a confirmation number, or the date and method they used. Check your bank account, payment processor, and mail for the payment. If you find it, apologize and confirm the payment was received. If you do not find it, ask them to resend the payment or provide the proof so you can investigate. Do not assume they are lying; payments do get lost in transit.