Overdue Invoice? How to Collect What You're Owed (Step by Step)

So your client hasn't paid. The invoice is weeks old. You've sent one reminder. Nothing.

This is not unusual, and it doesn't mean the money is gone. Most overdue invoices do get paid. The secret is knowing when to push harder, what to say, and when to stop waiting and take action. About 70% of these situations resolve before anyone has to file anything in a courthouse.

Here's what actually works, in the order you should do it.

What Is an Overdue Invoice?

An overdue invoice is one that hasn't been paid by the deadline you set. If you said payment was due in 30 days and it's been 35, the invoice is overdue. Past due means the same thing.

US small businesses with unpaid invoices are currently owed an average of $17,700 each, according to QuickBooks. For a one-person shop or small contractor, that's not a rounding error. That's the mortgage.

The good news is that most of these clients pay eventually. They just need to be pushed. So figure out your system now, before you're in that situation.

Prevention: Set Up So Clients Actually Pay

The easiest overdue invoice to collect is the one that never happens. A few habits up front will save you a lot of chasing later. These aren't complicated. Most people just skip them because they're in a rush to get the work started.

Get Payment Terms in Writing

Before work starts, get the payment terms on paper. When is payment due? Net 15? Net 30? What's the late fee? The client signs before you touch the project. I know, that sounds basic. It is. But a lot of people skip it because they're excited about the work and don't want to seem like they're being difficult.

Already working with someone and no contract yet? Send an email summarizing what you agreed to. Date it. Keep it. That email is evidence if things go sideways later.

Require Deposits on Larger Jobs

Ask for 25% to 50% upfront on bigger jobs. Clients who balk at a deposit are showing you something. And if they do ghost you later, at least your materials are covered. Construction, design, consulting, most trades. This is totally normal.

You can also do milestones. 30% at start, 30% midway, 40% at delivery. If they stop paying partway through, they don't get the finished work. Simple leverage.

Add Late Fees Before the Job Starts

Put a late fee in your contract. Something like 1.5% per month kicks in after 30 days. Tell the client upfront when you sign. Most people nod and move on. But the ones who might have dragged their feet suddenly find they can pay on time.

To enforce a late fee, it needs to be in the original agreement. You can't add it after the fact.

The Escalation Path: From Reminder to Resolution

When an invoice goes past due, there's a proven sequence. Each step gets firmer. Don't skip steps. But don't stay at step one for three months either.

Days 1 to 7: First Reminder

The day an invoice goes past due, send a short email. Keep it friendly. Keep it short. Nine times out of ten, someone just forgot. You're not accusing anyone yet. You're just creating a touchpoint.

What to include:

Tone: matter-of-fact, not apologetic. Something like: "Hi Sarah, just a heads-up: invoice #1047 for $2,400 was due on October 15. If you've already sent payment, please disregard. Otherwise, here's the link to pay online."

Many invoices get paid at this stage. The client forgot. Life got busy. One nudge fixes it.

Days 8 to 30: Phone Call and Second Email

If you don't hear back within a week, pick up the phone. Email is easy to ignore. A real voice is harder to dodge.

Call during business hours. Keep it professional. Ask if there's anything holding up payment. Sometimes there's a real reason. They're waiting on a check from their own client. Or the invoice went to the wrong person internally.

Follow the call with a written recap. "As we discussed on November 6, invoice #1047 for $2,400 is now 14 days past due. We'll expect payment by November 13."

That email creates a paper trail. It matters if this ever ends up in court.

Days 30 to 60: Formal Demand Notice

If calls and emails haven't moved anything, it's time for a formal notice. Not another friendly email. A real, written demand.

This goes out via certified mail or some other trackable method. Why? Because it creates proof of delivery. A certified letter with tracking hits differently than your fifth email in a row. Some clients pay the moment they see it. Something about an official envelope in the mail makes it real.

You can write one yourself using a demand letter template. State the amount, the original due date, your payment deadline, and what comes next if they don't respond. That's it. Keep the drama out of it.

A lot of disputes end right here. Others negotiate a payment plan at this stage. Either one beats writing it off.

Day 60 and Beyond: If They Still Won't Pay

At this point, the invoice is old. The client is either broke, hoping you'll give up, or genuinely disputing what you're owed.

You have three main options:

  1. Write it off. Sometimes the amount isn't worth the fight. Under a few hundred dollars, with a client you'll never work with again, it might be cheaper to move on and document the bad debt for tax purposes.
  2. Collections agency. You hand the debt to a third party. They take a percentage. Often 25% to 50% of whatever they recover. You might get some of your money back, but not all of it.
  3. Small claims court. You file a case. If you win, the court orders them to pay. This is often the best path for invoices between $500 and $10,000+.

There's also a fourth option: a resolution service that handles the entire escalation for you. More on that below.

An overdue invoice becomes a legal dispute when the client refuses to pay. That's true whether they're ignoring you or actively disputing what you're owed.

At that point, the relationship is probably already damaged. The goal shifts from preserving the relationship to recovering your money.

Before you file, gather your records:

You don't need a lawyer for most of these cases. But you do need documentation. The stronger your paper trail, the easier it is to win.

Small Claims Court for Unpaid Invoices

Small claims court exists specifically for disputes like overdue invoices. No lawyer required. The limits vary by state. Some states cap it at $2,500. Others go up to $25,000.

Most unpaid freelance and contractor invoices fall within small claims limits. If your invoice is under $10,000, there's almost certainly a court that can hear your case.

The process works like this:

  1. File a claim at your local courthouse and pay a filing fee ($30 to $185 depending on the state)
  2. Have the defendant served (the court usually handles this)
  3. Show up for your hearing with your documentation
  4. The judge decides, usually the same day

Win the case and you get a judgment. With a judgment in hand, you can garnish wages, levy a bank account, or put a lien on their property. It's not like sending a strongly-worded email. They actually have to deal with it.

One thing to know: you need to sue the right legal entity. If your client operates through an LLC or corporation, you have to name the business, not just the person. Suing an LLC or corporation has its own steps, and they differ from suing an individual. Getting this wrong means your case gets dismissed.

For the full step-by-step process, see our guide on how to take someone to small claims court.

Is It Worth Going to Court?

Three things determine whether it's worth it. How much is owed. How strong your case is. And whether you can find the defendant.

The math is usually pretty simple. Filing costs $30 to $185. If you're owed $2,000, that's a no-brainer. If you're owed $400 and the client lives in another city, it gets closer.

What kills collection is not knowing who to serve. Clients who operate behind an LLC, or who've moved, can be hard to track down. That's where the case stalls for a lot of small business owners.

Check the statute of limitations for small claims court in your state before you file. Most states give you 4 to 6 years on a contract claim. Miss that window and you lose the right to sue entirely.

Curious about the total cost? Here's a breakdown of how much it costs to sue someone, including filing fees, service costs, and what to expect.

The Option Most Small Businesses Don't Know About

Chasing an overdue invoice takes time. Phone calls. Follow-up emails. Certified mail. Figuring out who to serve. Filing paperwork at the courthouse. Most small business owners have better things to do.

That's what PettyLawsuit's Resolution Engine handles. You enter the case details. The system takes it from there.

Here's what happens automatically:

Over 5,000 businesses have used PettyLawsuit to chase down what they're owed. About 70% of cases resolve before court. Most clients pay when they see a real legal process starting, with their name and LLC on it. Not just another email.

You might not even need court. But if you do, the system is already there.

See how the Petty Resolution Engine works for businesses.

Frequently Asked Questions

Sixty days is the typical breaking point. A lot of people wait too long, hoping it'll resolve itself. It usually won't. By day 30, you should have already sent a formal demand notice. By day 60, if there's still nothing, you're not waiting anymore. You're just giving up money. File.

Can I sue someone for not paying an invoice?

Yes. An unpaid invoice is a breach of contract. If you have a written or verbal agreement and proof that you completed the work, you have grounds to sue. Small claims court handles most invoice disputes without a lawyer.

What if my client says they're disputing the invoice?

Ask them what specifically they're disputing. Get it in writing. Sometimes it's a real issue: they expected something different, or there was a miscommunication about the scope. That's worth resolving. But if they say "I dispute this" and can't tell you why, that's a stall. Keep escalating. A vague dispute with no details is not a legal defense.

What should I say in a past due invoice email?

Short is better. Hit the invoice number, the amount, and the due date. Add a payment link. That's the whole email for a first reminder. As the invoice gets older, your tone can get firmer, but keep it professional. The goal is payment, not a fight. Don't apologize for following up. And definitely don't threaten anything you're not prepared to actually do.

My client runs an LLC and I can't find their registered address. What do I do?

Every LLC is required to have a registered agent: a person or company authorized to receive legal documents on the LLC's behalf. You can look up the registered agent through your state's Secretary of State business search. Serve the registered agent and you've legally served the LLC. If that information is out of date, services like PettyLawsuit's PettyTrace can locate the right party.

Should I write off an overdue invoice or take it to court?

It depends on the amount. For invoices under $300 to $500, writing it off as a bad debt expense and moving on often makes sense. For anything over $500, small claims court is worth the filing fee. You'll get a judgment that lets you garnish wages or place a bank levy if they don't pay.

How long do I have to sue for an unpaid invoice?

It depends on your state and whether the contract was written or verbal. Most states give you 4 to 6 years on written contracts. A few states go lower. Don't wait too long. Once the statute of limitations expires, you lose the right to sue. Check the statute of limitations for your state before you assume you still have time.