What should I do if an invoice is 30 days past due?

At 30 days past due, escalate your communication. Send a direct email (not a gentle reminder) stating the invoice number, the original due date, the amount owed, and any accrued late fees. Specify a firm deadline for payment — typically 7 days. Reference your contract. If there's been no response to previous reminders, call or text in addition to emailing. Keep the tone professional and firm rather than apologetic.

Can I sue a client for not paying an invoice?

Yes. For amounts under $10,000–$25,000 (limits vary by state), small claims court is the practical option — it's designed for exactly this kind of dispute, filing fees are low ($30–$100), and you don't need an attorney. For larger amounts, civil court or a collections attorney is the route. You'll need your signed contract, the invoice, proof you delivered the work, and documentation of payment attempts. Win rates in small claims for clear freelancer invoice disputes are high.

How long do I have to collect an unpaid invoice?

The statute of limitations for contract claims varies by state, typically 3–6 years for written contracts and 2–4 years for oral agreements. In California it's 4 years for written contracts; in New York it's 6 years; in Texas it's 4 years. Don't let an unpaid invoice sit indefinitely — the longer it ages, the harder it is to collect and the less a collections agency will pay you for it.

Should I hire a collections agency for an unpaid invoice?

Collections agencies are worth considering for invoices over $500 that are 60+ days past due and where direct communication has failed. They typically charge 25–50% of whatever they collect. You receive less than the full amount, but something is better than nothing. Before going to collections, send a formal demand letter stating you'll refer the debt to a collections agency if unpaid by a specific date — this alone resolves many disputes.

What Happens If an Invoice Is Not Paid After 30 Days?

Thirty days past due and still no payment. It happens. How you handle the next steps determines whether you get paid, preserve the relationship if it’s worth preserving, or cut your losses and move on. Here’s the escalation sequence, what each step involves, and what actually works.

Understanding the timeline

First, separate “past due” from “30 days past the original due date.” If your terms are Net 30 and you sent the invoice 30 days ago, the invoice is just now due — not overdue. If your terms are Net 15 and 30 days have passed since the invoice date, you’re 15 days past due.

The timeline that matters:

Day 1–2 after the due date: Send a payment reminder. Most late payments at this stage are administrative oversights — wrong inbox, forgotten approval, processing backlog.
Day 7–14 past due: Send a direct follow-up that mentions the late fee clause.
Day 15–30 past due: Escalate. Direct phone call. Reference the contract. Set a firm deadline.
Day 30+ past due: Formal demand. Collections or legal action on the table.
Day 60–90 past due: Escalated collections process or small claims court filing.

Where you are in this sequence should determine your tone and your next step.

Step 1: The payment reminder (1–7 days past due)

Most invoices that are “late” at the 1–7 day mark aren’t ignored — they’re stuck in a process. Someone forgot to approve them. They went to the wrong inbox. The accounting department runs on a different cycle.

What to send: A short, professional email. Not apologetic, not aggressive. Just a direct check-in.

“Hi [Name], just following up on Invoice #INV-042 for $3,200, which was due [date]. Please let me know if you need anything from me to process this. You can pay via [method]. Let me know if you have any questions.”

Send this on day 2 or 3 after the due date. Most late invoices get resolved here.

Step 2: The direct follow-up (7–14 days past due)

If the first reminder doesn’t get a response within a few days, escalate the directness — not the agitation.

What to send:

“Hi [Name], Invoice #INV-042 for $3,200 is now [X] days past due. Per our agreement, a 1.5% monthly late fee is beginning to accrue on the outstanding balance. Please let me know your payment timeline or if there’s an issue I can help resolve. I’ll need payment by [specific date] to avoid further accrual.”

This email does three things: states the amount, mentions the late fee (which creates financial urgency), and sets a specific deadline. It’s firm without being hostile.

If you have a phone number for your billing contact, call at this stage. Voicemails and calls get faster responses than emails for outstanding payments.

Step 3: The formal demand (15–30 days past due)

If two email reminders and a call haven’t produced payment or a credible payment plan, it’s time for a formal demand. This is a more serious document — a letter (not just an email) that spells out the situation and your next steps.

Format: Send by email and by certified mail (so you have proof of receipt).

What to include:

Full invoice details (number, original due date, amount)
Statement of what’s overdue and what late fees have accrued
A firm deadline (typically 7–10 days from the letter date)
Clear statement that you will pursue legal action or collections if unpaid by that date
Your contact information for resolution

Tone: Professional and factual. No threats, no insults, no speculation about why they haven’t paid. Just the facts and the consequence.

“This letter is formal notice that Invoice #INV-042, issued [date] for $3,200, remains unpaid as of [today’s date], [X] days past the due date of [date]. Per our signed agreement dated [contract date], a late fee of 1.5% per month has accrued, bringing the total outstanding balance to $3,248. If payment in full is not received by [date — 10 days from now], I will pursue collection of this debt through available legal channels, which may include small claims court and credit reporting. Please remit payment immediately to avoid further action. Payment instructions: [details].”

The formal demand letter resolves a surprising number of disputes. Many clients who’ve been ignoring emails take a certified letter seriously — it signals that you’re prepared to follow through. Keep a copy of everything you send. You’ll need it if you go to small claims.

Step 4: Collections or small claims court (30–90 days past due)

If the formal demand doesn’t produce payment within the deadline, you have two main paths.

Collections agency

When to use it: Invoices over $500 that are 60+ days past due and unresponsive to direct contact.

How it works: You assign the debt to the collections agency. They pursue the client directly. If they collect, they keep 25–50% and remit the rest to you.

What to do before you engage an agency:

Send a final notice telling the client you’re referring the debt to collections if unpaid by [date]. This alone produces payment in many cases.
Verify the agency is licensed in the client’s state.
Understand their fee structure and whether they report to credit bureaus.

What you’ll receive: 50–75 cents on the dollar if they collect. Less than the full amount, but more than nothing.

Small claims court

When to use it: The invoice amount is within your state’s small claims limit and you want a court judgment.

Small claims limits by state (approximate):

California: $12,500 (individuals), $6,250 (businesses)
New York: $10,000
Texas: $20,000
Florida: $8,000
Illinois: $10,000
Washington: $10,000

What you’ll need:

Signed contract or written agreement
Copy of the invoice
Proof of delivery (emails confirming work was received, a delivery receipt, a project sign-off)
Documentation of all payment attempts
Copies of your demand letters

Filing fee: $30–$100 in most states.

Process: File at your local courthouse. You’ll be given a hearing date — typically 30–90 days out. The client is served a summons. Both parties appear before a judge. You present your documents; they present their defense. The judge rules, usually the same day.

Win rate: High for clear-cut freelance invoice disputes with a signed contract and documented delivery. Judges see these cases regularly and understand the pattern.

What happens after you win: You receive a judgment. This is a legal finding that the debt is owed. If the client still doesn’t pay, you can pursue wage garnishment, bank account levies, or liens on property — depending on your state. The judgment also shows up in public records, which affects the client’s credit and business reputation.

Step 5: Writing it off and tax implications

Sometimes the debt isn’t worth pursuing — the amount is small, the client is unreachable, or the legal costs outweigh the recovery. Writing off a bad debt is a legitimate business decision.

Tax treatment: In the US, freelancers and self-employed individuals generally cannot deduct unpaid invoices as bad debt because you haven’t recognized the income yet (cash-basis accounting). However, if you have an accrual-based business and have already reported the income, you can write it off as a bad debt expense. Consult your accountant.

What “writing it off” actually means: You stop pursuing collection and remove the receivable from your books. It doesn’t mean the debt disappears — if the client pays later, you report that income. But for your planning purposes, you treat it as lost.

When to write it off:

Amounts under $200 where collection costs exceed the debt
Clients who’ve disappeared or gone out of business
Disputes where the legal risk exceeds the recovery
When the relationship is already destroyed and there’s nothing to preserve

Prevention: how to cut late payments before they start

The best response to a 30-day-overdue invoice is never getting there. Most chronic late payment problems are preventable.

Require a deposit. A 25–50% upfront payment filters out non-serious clients and gives you a financial stake in the project before you’ve done all the work. Clients who’ve already paid something are more invested in paying the rest.

Use shorter payment terms. Net 30 is standard in some industries, but Net 15 works for most freelance and consulting work. The faster your due date, the faster you get paid, and the sooner you catch late payments before they compound.

Invoice the same day you deliver. Every day you wait to send the invoice moves the due date further out. Send it the day work is complete.

Use online payment. The single biggest lever in reducing payment time: make it easy to pay. A “Pay Now” link on the invoice that accepts cards or bank transfers reduces the steps between “I should pay this” and “payment sent.” Clients who have to write a check and mail it take longer than clients who can click a button.

Get a signed contract. A clear contract with payment terms, late fee clause, and your rate is the foundation. Without it, all the other steps are harder to enforce.

Follow up consistently. Don’t wait until 30 days to send the first reminder. Send a brief confirmation that the invoice was received 48 hours after sending. Set a calendar reminder for the due date. Make following up systematic, not reactive.