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How to Collect Payment From a Client Who Is Ignoring You

By the Casey team · · 8 min read
The short answerSwitch channels, make one clear ask with a deadline, then escalate in steps: a phone call, a formal demand letter, a payment plan offer, and finally collections or small claims. Silence usually means avoidance, not refusal, so make paying easy and the next step unmistakable.

A client who stops answering is frustrating, but it's rarely a mystery. In most cases the invoice got buried, the money is tight, or the client is dreading an awkward conversation. Your job is to make paying easy, make the next step clear, and escalate on a schedule instead of waiting and hoping.

This guide walks through that process in order, with wording you can copy.

Why is my client ignoring me?

Silence has a few common causes, and each one calls for a slightly different move:

  • They never saw it. The invoice went to spam, an old email address, or a person who doesn't handle payments.
  • They can't pay right now. Cash is tight, so they avoid you rather than admit it.
  • They're unhappy with something. They have a complaint they haven't voiced, and silence feels easier than a dispute.
  • They're disorganized. They meant to pay and forgot.
  • They don't intend to pay. This is the least common cause, but it's the one you need to rule out early.

You can't tell which one you're dealing with until you get a response. So the first goal isn't payment, it's getting any reply at all.

Step 1: Confirm the invoice actually reached them

Before you escalate, check the basics.

  1. Look at the email address on the invoice. Is it the right person, and is it still active?
  2. Check whether the invoice was opened, if your system tracks it.
  3. Make sure the invoice is clear: amount, due date, what the work was, and a way to pay in one click.
  4. Confirm the payment link works.

A surprising number of "ignored" invoices were simply never received or were impossible to pay. Fix that first so you're not escalating over a technical problem.

Step 2: Change the channel, not just the volume

If three emails got no answer, a fourth email won't help. Switch how you reach them.

  • Send a text message (if you have a business relationship and they've given you their number for this kind of contact).
  • Call during business hours and leave a short, specific voicemail.
  • Reach the other contact at the company, such as an office manager, bookkeeper or accounts payable person.

Keep each message short and easy to answer. A person who's avoiding you is more likely to reply to a one-line question than to a long paragraph.

A short text you can send

Hi [Name], it's [You] at [Business]. Invoice #[number] for $[amount] was due on [date]. Here's the link to pay in about a minute: [link]. If something's off or you need a few days, just reply and let me know.

That last line matters. It gives the client a low-pressure way to respond, which is often all it takes to break the silence.

Step 3: Make one clear ask with a deadline

Vague reminders get vague results. After your first attempts, send a message that names an amount, a date and a next step.

Email script: second follow-up

Subject: Invoice #[number] – $[amount] past due, reply needed by [date] Hi [Name], I've reached out a few times about invoice #[number] for $[amount], which was due [date]. I haven't heard back, and I want to resolve this. You can pay here: [link]. If you can't pay the full amount right now, tell me what you can do and we can set up a short plan. If there's a problem with the work, tell me that too and I'll look into it right away. Please reply by [date, 5 to 7 days out]. After that I'll need to move to the next step in my collections process. Thanks, [You]

For more phrasing options, see our guide on how to ask a client for payment politely and what a payment reminder email should say. You can also draft one fast with our free payment reminder generator.

Step 4: Offer a way to pay that fits their situation

If the real problem is cash flow, a demand for the full amount can make the client go quieter. Offering structure often gets the money moving.

  • Partial payment now, balance later. Even a small payment shows good faith and resets the relationship.
  • A simple payment plan. For example, equal payments over a few weeks, in writing, with the dates and amounts spelled out.
  • Different payment methods. Some clients respond better to a card link, others to ACH.

Put any agreement in writing, even if it's just a confirming email: the total owed, each payment amount and date, and what happens if a payment is missed. Money in installments is better than a fight you may never win.

Step 5: Send a formal demand letter

If the client still doesn't respond after several attempts across different channels, it's time for a formal written demand. Send it by email and, ideally, by a trackable method such as certified mail so you can show it was delivered.

A solid demand letter includes:

  1. The client's name and the invoice details (number, date, amount, due date).
  2. A short description of the work or product delivered.
  3. The amount owed, including any late fees or interest that your contract or invoice terms actually allow.
  4. A firm deadline, typically 7 to 14 days.
  5. A plain statement of what you'll do if it isn't paid, such as referring it to collections or filing in small claims court.

Don't threaten anything you aren't prepared to do, and keep the tone factual rather than angry. Our guide on writing a final notice before sending to collections has a full template.

A demand letter isn't always legally required before you can sue, but it's standard practice. It documents your effort and often prompts payment. Rules on pre-suit notices can vary by state, so check yours.

Step 6: Understand your options if they still don't pay

When a client stays silent past your deadline, you generally have three paths.

Option A: Send it to collections

A collection agency or collections service takes over the contact, the calls and the formal notices. Fees are usually a percentage of what's recovered, so you can estimate the cost with our free collection agency fee calculator. We cover timing in when to send an invoice to collections.

A note on the law: the federal Fair Debt Collection Practices Act (FDCPA) governs third-party debt collectors and is generally aimed at consumer debts, such as personal, family or household debts, rather than business-to-business invoices. If your client is an individual consumer, different and stricter rules can apply to how anyone collects. State laws also vary. This is general information, not legal advice, so talk to an attorney if you're unsure which rules cover your situation.

Option B: File in small claims court

For smaller balances, small claims court is designed for people who don't have lawyers. Each state sets its own dollar limit, filing fees and procedures, and those change, so check your state court's website for current numbers. You typically need your invoice, contract or agreement, and a record of your attempts to collect.

Option C: Hire an attorney

For larger amounts, or if the client is disputing the work, an attorney letter on firm letterhead can get attention that your own messages couldn't. Weigh the cost against the amount owed.

Time also matters. Every state has a statute of limitations on how long you have to sue over an unpaid debt, and it varies by state and by whether the agreement was written or oral. Don't let an old invoice sit until the window closes.

What about late fees and interest?

You can generally only charge a late fee or interest if you told the client up front, in your contract or invoice terms, and if state law allows the amount. Adding a surprise fee after the fact makes collection harder, not easier. See can I charge a late fee on an unpaid invoice, and work out the numbers with our free late fee calculator.

What should I avoid doing?

  • Don't harass. Repeated calls and messages at all hours can backfire and, depending on who the debtor is and your state, may cross legal lines.
  • Don't publicly shame the client on social media or review sites. It can create legal exposure for you.
  • Don't threaten things you won't do. An empty threat teaches the client that your deadlines mean nothing.
  • Don't wait indefinitely. The longer an invoice goes unpaid, the harder it usually is to collect.
  • Don't skip documentation. Keep copies of the contract, invoice, messages and proof of delivery.

If a client is outright refusing rather than ignoring you, the playbook shifts to dispute resolution. See what to do when a client refuses to pay an invoice.

A simple timeline you can follow

  • Due date: Invoice sent earlier, with a clear pay link.
  • 3 days before due: Friendly reminder.
  • Day 1 to 3 past due: Polite check-in by email or text.
  • Day 7: Call and send a second message on a different channel.
  • Day 14: Firm email with a deadline and a payment plan offer.
  • Day 30: Formal demand letter with a 7 to 14 day deadline.
  • Day 45 to 60: Decide on collections, small claims or an attorney.

Adjust the pace to your industry and the size of the invoice, but keep the order: easy, then clear, then formal, then legal.

How Casey handles this for you

Chasing a silent client is the part most owners dread and put off. Casey is an AI accounts receivable assistant that sends your invoice with a card or ACH pay link, reminds the client 3 days before the due date, and from 4 days past due follows up automatically on the channel and at the time each client responds to, offering payment plans and partial payments along the way. If an invoice reaches 60+ days past due, one tap sends it to Casey's collections team for calls, formal demand letters and settlements with your approval. Casey checks with you before anything sensitive. The reminder before the due date is free, you pay $5 per invoice only if Casey has to chase it, and collections cost 20% of what's recovered, nothing if nothing is. See pricing.

For more prevention tactics, read how to get clients to pay invoices on time.

Frequently asked questions

How long should I wait before escalating with a client who ignores my invoices?

A common approach is a polite check-in within a few days of the due date, a call and a second channel around day 7, a firm email with a deadline around day 14, and a formal demand letter around day 30. Adjust for the invoice size and your industry, but don't wait months.

Do I need a demand letter before suing a client?

Usually it's not legally required, but it's standard practice and can prompt payment. It also documents that you tried to resolve things first. Some states have their own rules on pre-suit notices, so check yours or ask an attorney.

Can I keep working for a client who isn't paying?

It's risky. Consider pausing new work until the balance is paid or a payment plan is agreed in writing. Check your contract for terms that allow you to stop work for nonpayment.

Does the FDCPA apply to unpaid business invoices?

The FDCPA generally covers personal, family or household debts, not business-to-business invoices, but state laws on collection conduct can still apply. If your client is an individual consumer, different rules may apply. This isn't legal advice, so confirm with an attorney.

Is small claims court worth it for an unpaid invoice?

It can be, especially for smaller balances, since you don't need a lawyer and costs are lower. Each state has its own dollar limit and filing fee, so check your state court's website. Weigh the amount owed against your time and the chance the client can actually pay.

What if my client is a consumer, not a business?

Consumer clients are treated differently. Collection rules can be stricter, especially if a third-party collector gets involved. Keep communication professional and documented, and consider getting legal advice before escalating.

This article is general information, not legal or tax advice.

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