When an invoice is overdue, follow a fixed escalation ladder: a friendly email the day after the due date, a firmer email at day 7, a phone call at day 14, the agreed late fee and a pause on new work at day 30, a final notice at day 45, and a decision about small claims or collections at day 60. Each step gets firmer, and each one is cheaper than the next.
Most overdue invoices are paid on the first or second rung. The ladder matters for the rest, because chasing by mood (waiting too long, then sending one angry email) is how small balances turn into bad debt. This guide covers each step, what to say, and what each one costs you. For copy-and-paste wording, our overdue invoice email templates cover every stage.
When does an invoice count as overdue?
An invoice is overdue the day after its due date if the money has not arrived. An invoice due on May 15 and unpaid at the end of that day is overdue on May 16. "Overdue" and "past due" mean the same thing.
The due date comes from your payment terms. On net 30, that is 30 days after the invoice date. On due upon receipt, it is the day the client receives the invoice, so the ladder starts sooner. If your invoice shows only "net 30" and no date, write the actual date on future invoices. Clients argue less about a printed date.
What is the overdue invoice escalation ladder?
The ladder is a schedule you decide before any invoice is late. Each rung uses a firmer channel and a firmer tone than the one before.
| Day | Action | Channel | What it costs you |
|---|---|---|---|
| 3 days before due | Heads-up reminder | Nothing | |
| 1 day overdue | Friendly nudge | A minute | |
| 7 days overdue | Firm reminder | A minute | |
| 14 days overdue | Phone call | Phone | 10 minutes and some nerve |
| 30 days overdue | Late fee (if agreed) and pause on new work | Email, then written notice | Some goodwill with the client |
| 45 days overdue | Final notice | Email and a posted letter | Postage, and likely the client |
| 60 days overdue | Payment plan, small claims, collections or write-off | Court, agency or your books | Filing fees, a share of the debt, or the whole balance |
The days are a starting point. Shorten the gaps for a new client or a large balance. Lengthen them for a client with years of on-time payments who has a known reason for the delay.
What should you do before the due date?
Send a short reminder about 3 days before the invoice is due. It catches invoices stuck in an approval queue or sent to the wrong person, while there is still time to fix them. It costs nothing, and most clients read it as good service.
Also confirm the invoice arrived. A one-line "just checking this reached you" a day or two after sending catches lost emails before they become late payments.
What do you send on day 1?
Send a friendly email the day after the due date. Assume it is an oversight, because it usually is. Give the invoice number, amount and due date, add the pay link, and ask if anything is blocking payment, such as a missing PO number.
Keep it short and neutral. Our day 1 to 7 template is a good starting point.
What changes on day 7?
On day 7, send a firmer reminder. State how many days overdue the invoice is, repeat the amount and due date, and mention the late fee if your terms include one. Ask for one of two things: payment, or a date when payment will arrive.
Avoid apologizing for asking. "Invoice #1042 for $1,800 is now 7 days overdue" is polite and clear.
Why call on day 14?
By day 14, two emails have gone unanswered, so change the channel. A phone call is hard to ignore, and it tells you why the invoice is late: a cash problem, a dispute about the work, or an invoice sitting in the wrong inbox. Each one needs a different fix.
A simple script:
"Hi Sam, it's Alex from Alex Design. I'm calling about invoice 1042 for $1,800, which was due on May 15. Is anything holding it up on your side? ... Great, when can I expect payment?"
Write down the date they give you, and confirm it by email the same day. That email becomes part of your record if the invoice goes further.
If the client says they cannot pay in full, offer a payment plan now. It is better than waiting until day 60 to have the same conversation.
What happens at day 30?
At day 30, two things change, and you tell the client about both in writing first.
- Apply the late fee, if your contract or terms include one. A late fee the client agreed to before the work started is far easier to collect than one added afterward. To see what your rate comes to on this invoice, use the late fee calculator.
- Pause new work. Finish or hand over anything mid-delivery, then stop starting new work until the balance is paid. Tell the client the exact date the pause starts and what resumes it. Our guide to late-paying clients covers how to pause work without ending the relationship.
Rules on late fees and interest vary by state and country, and some places cap them. Check the limits where you and your client are based.
What goes in a final notice at day 45?
A final notice states the amount owed, how long it has been overdue, the reminders you already sent, and what you will do next if it stays unpaid, with a date. Send it by email and by post, so the client cannot say it never arrived.
Invoice 1042 for $1,800, due May 15, is now 45 days overdue. I sent reminders on May 16, May 22 and May 29, and we spoke by phone on May 29. If payment of $1,800 plus the agreed late fee of $27 is not received by July 14, I will file a claim in small claims court to recover the full amount.
Only name a next step you will take. A threat you don't carry out teaches the client to ignore your deadlines.
What are your options at day 60?
At day 60, an invoice is unlikely to be paid without outside pressure. You have four choices:
| Option | Best for | Cost |
|---|---|---|
| Payment plan | Clients who want to pay but can't pay in full | Your time, and waiting longer |
| Small claims court | Clear debts under your state's small claims limit | A filing fee and a day or two of your time |
| Collection agency | Debts you don't want to pursue yourself | A share of whatever the agency recovers |
| Write it off | Small balances, or clients who have closed down | The full amount, recorded as bad debt |
Small claims limits, filing fees and agency terms vary by state, so check your state court's website before deciding. Contractors and other trades may also have lien rights on the property they worked on, but lien deadlines are short and set by state law. Check yours as soon as an invoice goes past 30 days.
This is general information, not legal advice. Rules vary by state and country.
What does each step cost you?
The early rungs are nearly free and the late ones are expensive, which is why you start early. Two emails and a phone call take about 15 minutes in total. A final notice costs postage and probably the client. Small claims costs a filing fee and time off work, and a collection agency keeps part of whatever it recovers.
The cost you can't see is the delay itself. Every week an invoice sits unpaid is a week you cover rent, materials or payroll from your own savings. Our roundup of late payment statistics shows how common long delays are.
How do you stop climbing the ladder by hand?
Most of the ladder is reminders on a schedule, which software can send for you. On Pro and Business plans, SolidInvoice emails the client 3 days before the due date, then at 1, 7 and 14 days overdue, with a pay link in every message. After the 14-day reminder, it notifies you, which is the point where you pick up the phone. The reminders stop as soon as the invoice is paid. See invoice reminder software for the full schedule.
If a client agrees to a payment plan, record each partial payment against the invoice. The pay link then charges only the remaining balance. Trades businesses can see how this fits their jobs on the invoicing for plumbers and invoicing for contractors pages.
Overdue invoice FAQ
When is an invoice considered overdue?
An invoice is overdue the day after its due date if it has not been paid. An invoice due on May 15 that is still unpaid at the end of that day is overdue on May 16. Overdue and past due mean the same thing.
How long should you wait before chasing an overdue invoice?
Don't wait. Send a friendly reminder the day after the due date, since most late invoices are oversights. A short reminder about 3 days before the due date catches many of them before they are late at all.
When should you call a client about an unpaid invoice?
Call at around 14 days overdue, after two emails have gone unanswered. A call is harder to ignore than an email and tells you why the invoice is late. Confirm any payment date they give you by email the same day.
Can you add a late fee to an overdue invoice?
You can if the client agreed to it before the work started, in your contract or payment terms. A fee added afterward is hard to collect. Some states and countries cap late fees and interest, so check the rules where you and your client are based.
Should you stop work when a client hasn't paid?
Pausing new work at around 30 days overdue is reasonable, as long as you warn the client in writing first. Give the date the pause starts and say that work resumes when the balance is paid. Finish or hand over anything already mid-delivery.
When should an overdue invoice go to small claims or collections?
Consider it at around 60 days overdue, after reminders, a phone call and a final notice with a deadline have failed. Small claims suits clear debts under your state's limit. A collection agency keeps a share of what it recovers. Small balances are often cheaper to write off.
Let reminders handle the first rungs of the ladder, with a pay link in every email. Start a free 14-day trial of SolidInvoice.