Getting Paid · · Hunter Hammonds
What to Do When a Client Won't Pay: A Step-by-Step Playbook
What to do when a client won't pay: a step-by-step playbook from a friendly reminder through phone call, demand letter, mechanics lien, small claims, and write-off.
When a client won't pay, work the ladder from softest to hardest and stop the moment they pay. Start by verifying the invoice is correct and was actually received. Then send a short reminder sequence, make one direct phone call, and offer a payment plan if they are willing but stuck. If that fails, send a written demand letter, then escalate to the tool that fits: a mechanics lien if you did construction work on a property, small claims court for most other invoices, or a collections agency once the relationship is over. The last step is a clean write-off decision, which is a business call, not a failure.
Most late invoices never make it past the reminder stage. You are owed the money, the paper trail is on your side, and the goal at every rung is to make paying you the path of least resistance. This post is a complete manual you can run yourself with the templates below. Where the law comes up, this is general information, not legal advice, and the rules vary by state, so links to authoritative sources are included.
For context on how common this is: the 2025 Intuit QuickBooks Small Business Late Payments Report found small businesses are owed about $17,500 on average, and 47% reported invoices more than 30 days overdue. In construction it is worse. Built's 2025 research found roughly 2 in 3 contractors regularly face delayed payment. You are not bad at your job. This is a normal part of running a service business, and it has a process.
What are the exact steps to get a client to pay?
Run these in order and stop as soon as you are paid. Each step raises the pressure a notch while keeping the door open for the client to just settle the bill.
- Verify the invoice. Confirm the amount, the work, the due date, and that it actually landed in the right inbox.
- Send a reminder sequence. Three short messages over about 30 days, escalating in tone.
- Make one phone call. A live conversation clears up most stalls that email cannot.
- Offer a payment plan. When they want to pay but cannot do it all at once, split it.
- Send a demand letter. A formal, dated written request that names your next move.
- File a mechanics lien (construction only). A claim against the property with hard state deadlines.
- File in small claims court. You represent yourself for most invoice-sized disputes.
- Refer to collections. A last resort once the relationship is finished.
- Make the write-off decision. Recover your time and close the loop.
When is each step actually worth it?
The right rung depends mostly on how much you are owed. Chasing a $75 invoice through small claims costs more in your time than the invoice is worth. Filing a lien on a $40,000 construction balance is very much worth the paperwork. Use this as a rough guide, not a rule.
| Step | Roughly worth it when the invoice is | Cost to you | Notes |
|---|---|---|---|
| Verify the invoice | Any amount | Minutes | Always do this first |
| Reminder sequence | Any amount | Minutes | Recovers most late invoices on its own |
| Phone call | About $250 and up | 15 minutes | Highest-leverage step for most owners |
| Payment plan | About $500 and up | 30 minutes | When they want to pay but cannot all at once |
| Demand letter | About $500 and up | An hour | The last step before legal action |
| Mechanics lien | Often about $1,000 and up | Filing fee plus tight deadlines | Construction only, consider a lien service |
| Small claims | A few hundred up to your state limit | Modest filing fee plus a court day | You represent yourself |
| Collections | About $1,000 and up, gone cold | A large cut of what they recover | Relationship is over |
| Write-off | Under about $100, or uncollectable | Your time back | A decision, not a failure |
Step 1: How do I verify the invoice before I chase anyone?
Before you assume bad faith, rule out an honest miss. A surprising share of "won't pay" turns out to be "never saw it" or "the amount looked wrong." Check four things: the invoice went to the correct person and email, the amount and line items match what you agreed, the due date and payment terms are clearly stated, and there is a working way to pay (a link, bank details, or an address). If anything is off, fix it, resend a clean copy, and treat that as the new day one.
Step 2: What should my reminder sequence say?
Send three short messages over about a month, each one firmer than the last. Keep them brief, name the invoice number and amount, and always include a way to pay in the same message. Copy these and swap in your details.
First reminder, the day it goes past due:
Subject: Invoice #1042 now due
>
Hi [Name], quick note that invoice #1042 for $[amount] was due [date]. If it is already on its way, thank you and please ignore this. If not, you can pay here: [link]. Happy to resend the invoice if you need it.
>
[Your name]
Second reminder, around day 10:
Subject: Invoice #1042 is 10 days past due
>
Hi [Name], invoice #1042 for $[amount] is now 10 days past due. If there is a problem with the work or the invoice, tell me and I will sort it out. Otherwise I would appreciate payment by [date]. Pay here: [link].
>
[Your name]
Final notice, around day 30, which sets up the call:
Subject: Second notice, invoice #1042, $[amount] outstanding
>
Hi [Name], I have not heard back on invoice #1042, now 30 days past due. I would like to close this out this week. I will call you [day] to sort it out. If it is easier, reply here or pay at [link].
>
[Your name]
Step 3: What do I say on the phone call?
Call once you have sent the final written notice, and keep it calm and direct. The point of the call is to get a commitment to a specific date, not to argue. Ask whether anything is wrong with the work first, because that flushes out real disputes early. Then ask for a date and try to lock it in before you hang up.
"Hi [Name], it is [Your name] from [Business]. I am calling about invoice #1042 for $[amount], now 30 days past due. First, I want to make sure nothing is wrong on my end. Is there an issue with the work or the invoice? ... Okay, good. So when can I expect payment? Can we lock in a date today?"
Right after the call, send a one-line email confirming what you agreed. That turns a verbal promise into part of your paper trail.
Step 4: When should I offer a payment plan?
Offer a plan when the client clearly wants to pay but genuinely cannot cover it all at once. It is better to collect the full amount over 60 days than to fight for it in court. Keep it simple: a set number of equal payments on fixed dates, ideally with the first one due immediately. Put it in writing, have them agree in writing, and keep sending after each payment. A plan is a tool for the willing-but-stuck, not a reward for the client who is dodging you.
Step 5: How do I write a demand letter?
A demand letter is a formal, dated request for payment by a firm deadline that states what you will do if it is ignored. It is the bridge between chasing and legal action, and it signals you are serious. Send it by email and, for larger amounts, by certified mail so you can prove it arrived. Give a clear deadline, usually 10 to 14 days.
[Date]
>
[Client name and address]
>
Re: Final demand for payment, invoice #1042
>
This is a formal demand for payment of $[amount] for [work performed], invoiced on [date] and now [60] days past due. Please pay the full amount by [date]. If I do not receive payment or a written response by that date, I will pursue the remedies available to me, which may include a mechanics lien, a claim in small claims court, and referral to a collections agency. I would prefer to resolve this with you directly.
>
[Your name, business, phone, email]
Step 6: Should I file a mechanics lien?
If you performed construction or improvement work on a property and have not been paid, a mechanics lien is often your strongest tool. A lien is a legal claim against the property itself, which clouds the title so the owner generally cannot sell or refinance until you are paid. That creates real leverage. The catch is that liens are construction-specific and deadline-driven, and missing a preliminary notice or filing window can wipe out your rights entirely no matter how legitimate the debt. Deadlines and rules vary widely by state, so read Nolo's guide to mechanics' liens for contractors and check your state's specifics before you rely on this. Because the deadlines are unforgiving, many contractors use a lien filing service or an attorney rather than doing it alone.
Step 7: How does small claims court work?
For most non-construction invoices, small claims court is the practical legal path, because you represent yourself, filing fees are usually modest, and the process is built for ordinary disputes over money. Each state sets a dollar limit on what you can sue for, and the limits, fees, and steps vary, so start with Nolo's overview of small claims court and then your own state court's page. The basic path is the same everywhere: confirm your claim is under the limit, file with the right county court, pay the filing fee, and serve the defendant so they are officially notified. Bring your paper trail, the invoice, the contract, your reminders, and the demand letter, and let it speak for itself.
Step 8: When should I hand it to collections?
Send a debt to a collections agency only after you have accepted the relationship is over and the money has gone cold. Agencies commonly take a large cut of whatever they recover, sometimes a third or more, so you are trading a chunk of the invoice for the chance of getting anything at all. That trade makes sense on a stale $3,000 debt from a client you will never work with again. It rarely makes sense for a live customer you still want to keep, where a phone call or a payment plan does more.
Step 9: When do I just write it off?
Write it off when the amount is small enough that your time is worth more than the invoice, or when every collection path has run out. Writing off a genuinely uncollectable debt is a business decision that frees you to stop spending energy on it, and it may be deductible, so ask your accountant how to record it. The trap is letting an invoice sit in limbo for months, neither collected nor closed. Decide, record it, tighten your deposit and terms so it happens less often, and move on.
FAQ
How long should I wait before escalating an unpaid invoice?
Send the first reminder the day it goes past due, a firmer one around day 10, and a final notice near day 30. If there is still no payment or reply, move to a phone call and then a demand letter.
Can I charge a late fee on an overdue invoice?
Often yes, but only if a late fee was in your contract or on the invoice before the work, and the rate has to stay within your state's cap. Rules vary by state, so check your state's rules before you add one.
Is it worth taking a client to small claims court?
It is usually worth it for invoices from a few hundred dollars up to your state's small claims limit, because you represent yourself and filing fees are usually modest. Below about $100, the time rarely pays off.
What is a mechanics lien and can I file one myself?
A mechanics lien is a legal claim against the property you improved that makes it hard for the owner to sell or refinance until you are paid. It is construction-specific with strict deadlines, so many contractors use a lien service or attorney rather than filing alone.
Should I use a collections agency?
Consider it only after the relationship is over and the debt has gone cold, since agencies commonly take a large cut of what they recover. For a live client you still want to keep, a phone call or payment plan usually works better.
Letting Remi run this for you
You can run this entire playbook yourself with the templates above, and for most late invoices you should, because it works. The hard part is not knowing the steps. It is being the person who tracks every due date, notices the moment an invoice goes stale, and actually sends the day-10 reminder when you are exhausted and would rather not.
That is the exact job Remi was built for. Remi is an AI teammate for small business owners. Remi connects to the tools you already use, watches your invoices, and speaks up first when one is going past due, so nothing quietly slips to 60 days while you are on a job site.
When something needs chasing, Remi drafts the reminder, the phone-call note, or the demand letter for you, in your voice, ready to go. Nothing is sent and nothing is marked paid without your approval, and every action comes with a receipt you can check. Remi prepares and tracks the whole ladder. You stay the one who decides.
Remi is an AI teammate. We say so because Remi will never pretend otherwise, and neither will we. If you'd rather not be the one working the unpaid-invoice ladder at 9pm, that is the work Remi takes off your plate.