The first step when a client won't pay is to send a polite but firm reminder within 48 hours of the due date. Most unpaid invoices are not malice. They are forgetfulness, lost emails, or a payment process that requires a form the client never filled out. Start with the simplest explanation before escalating.
What to do when a client ignores your invoice
Step 1: Send a reminder within 48 hours
Do not wait a week. Do not wait three days. Send a reminder the day after the invoice is due. The language should be friendly but clear.
Subject: Invoice #1042, due September 1, amount $1,500
"Hi [Client], just a quick note that Invoice #1042 for $1,500 was due yesterday. I have attached a copy in case the original got lost. Let me know if you need anything from my end to process payment."
This is not aggressive. It is professional. Most clients will respond with an apology and a payment date. According to a Jobbers survey, 63% of freelancers wait over 30 days to get paid, and the number one reason is that invoices go unread in inboxes. A reminder within 48 hours catches the invoice before it sinks.
Step 2: Follow up every 48 hours
If the first reminder gets no response, send another one 48 hours later. Then another 48 hours after that. Keep the tone professional. Do not get angry. Do not threaten. Just keep the invoice in front of the client.
Each follow-up should reference the previous one. "Following up on my note from Tuesday. Invoice #1042 for $1,500 is now five days past due. Can you confirm when payment will be processed?"
The goal is to make ignoring the invoice more uncomfortable than paying it. Most clients will pay after the second or third follow-up because the daily reminders become harder to ignore than opening their banking app.
Step 3: Stop working
If the invoice is overdue and the client is not responding, stop delivering new work. This is not petty. It is a business decision. A client who is not paying for work already completed is not going to pay for new work either.
Send a short message: "I am pausing work on [project] until Invoice #1042 is settled. I can pick back up as soon as payment clears." This sets a clear boundary and puts the ball in the client's court.
Step 4: Send a formal demand letter
After 14 days with no payment and no response, send a formal demand letter. This is different from an email reminder. It is a written document that states the amount owed, the original agreement, and a deadline for payment.
A demand letter should include:
- The invoice number and amount
- The date the invoice was due
- The original agreement or contract terms
- A deadline for payment (usually 10 business days)
- A statement that you may pursue legal collection if payment is not received
Many clients pay after receiving a demand letter because it signals that the freelancer is serious and organized. A demand letter costs nothing to write and send, and it creates a paper trail that matters if the dispute ends up in small claims court.
Step 5: Consider small claims court
If the demand letter deadline passes and the client still has not paid, small claims court is the next step. Filing fees are typically under $100, and freelancers can represent themselves without a lawyer.
Small claims court limits vary by state. In New York, the limit is $5,000. In California, it is $12,500 for individuals. Check the limit in the client's state before filing. The court will need the contract, the invoice, email correspondence, and proof that work was delivered.
Small claims is designed to be accessible. The filing process is straightforward, and most courts have online resources to walk through the steps. A 2023 report by the U.S. Chamber of Commerce noted that small claims filing is one of the most cost-effective ways for small businesses and independent workers to recover unpaid invoices.
Step 6: Use a collection agency as a last resort
For larger invoices, a collection agency can pursue payment on a freelancer's behalf. Agencies typically take 25 to 50% of the recovered amount as their fee. They do not get paid unless the invoice is collected.
This only makes sense for invoices over $1,000. For a $300 invoice, the agency fee would eat most of the recovery. But for a $5,000 unpaid invoice, paying $1,250 to collect $3,750 is better than collecting nothing.
How to prevent unpaid invoices in the future
The best way to handle unpaid invoices is to prevent them from happening in the first place. A few changes to how a freelancer structures their billing can cut late payments significantly.
Require a 50% deposit before starting work. This is standard for project-based freelancers and gives working capital while the work is in progress. If a client refuses to pay a deposit, that is a signal about their payment habits.
Set payment terms to "due on receipt" or Net 15 instead of Net 30. According to data from Jobbers, Net 30 invoices go overdue 55% of the time. Due-on-receipt invoices get paid in days, not weeks. The longer the payment window, the longer the client waits.
Use card payment links. When a client can pay by card with a single link, the friction drops to near zero. No logging into a bank portal, no writing a check, no mailing anything. A payment link lets the client pay in under 30 seconds. PayFly sends invoice links that clients can pay with one click, and the 2.9% flat fee means a $1,000 invoice costs $29 in fees and puts $971 in the freelancer's account.
Include payment terms on every invoice. "Due on receipt" or "Net 15" should be printed on the invoice itself, not just mentioned in the contract. The invoice is the document the client's accounts payable team reads, so the terms need to be there.
Send invoices immediately after delivery. Do not batch them at the end of the month. A freelancer who sends an invoice the same day work is delivered gets paid faster than one who waits a week. The work is fresh in the client's mind, the value is clear, and the invoice feels like a natural part of the transaction.
FAQ
How long should a freelancer wait before following up on an unpaid invoice?
48 hours after the due date. Waiting longer makes the invoice easier to ignore. The first reminder should be friendly, not confrontational, and should include a copy of the invoice.
Can a freelancer charge late fees on overdue invoices?
Yes, if the late fee is stated in the original contract or on the invoice before the work begins. Late fees typically range from 1.5% to 2% per month. A freelancer who adds late fees retroactively, without prior agreement, has a harder time collecting them.
Is small claims court worth it for a $500 invoice?
It depends on the state, but filing fees are usually under $100 and the process is designed for small amounts. For $500, the filing fee plus time spent may not be worth it. For $1,000 or more, small claims is often worthwhile.
Should a freelancer keep working while an invoice is unpaid?
No. If a client has not paid for completed work, continuing to deliver new work extends the risk. Stop work, communicate clearly, and resume only after payment clears.
What payment terms reduce late payments the most?
Due on receipt and Net 15 reduce late payments significantly compared to Net 30. The shorter the window, the faster the client pays. Card payment links also reduce friction and speed up payment regardless of the terms.