Send a friendly note on the due date, an email with a payment link on day 7, a phone call on day 14, and a firm final notice on day 30. Each message gets slightly shorter and slightly firmer, and none of them is rude. Most unpaid invoices are stuck in someone's inbox or approval queue, not refused, so the first two messages should assume that.

Below are all four, written out for a made-up job: Wren Okoye runs Pell Studio, a small web design studio, and sent Orchard & Pine Furniture an invoice for $3,200 with net-15 terms. It was due October 1. Copy the wording, change the names, and keep the order. This is general information, not legal advice, and late-fee and collection rules vary by state.

Why late invoices stall

When an invoice goes quiet, the cause is usually dull. The person who hired you isn't the person who pays. It's waiting on a purchase order number. It went to a shared inbox no one reads. Or the owner meant to pay it on Friday and Friday went badly. Real disputes and real cash trouble exist too, and you can't tell which one you have until you ask. Open with curiosity, not accusation, and you keep the client even if the invoice turns out to be the problem.

Message one: the due-date note

When: the morning the invoice is due, or three days before for clients who are always late.

Subject: Invoice 1042 is due today

Hi Beatriz, a quick reminder that invoice 1042 for $3,200 is due today. The link below takes you straight to payment by card or bank transfer: [payment link]. If anything on it needs changing, let me know and I'll fix it right away.

Thanks, Wren

Why it works: it's tiny, it gives a way to pay in one click, and it invites a correction, which flushes out a wrong PO number or a wrong address before the invoice is late.

Variation: for a client with a bookkeeper, send the same note to the person who actually pays, and copy the owner.

Message two: day 7, with the payment link

When: seven days after the due date, if nothing has come in.

Subject: Invoice 1042: 7 days past due

Hi Beatriz, I haven't seen payment for invoice 1042 ($3,200, due October 1), so I'm sending it again in case it got lost. The invoice is attached and you can pay here: [payment link].

If it needs a PO number, or should go to a different person, tell me who and I'll resend it today. Can you let me know the date you expect it to be paid?

Why it works: it hands the client two easy exits, "I'll pay it" or "send it to someone else," and the last question asks for a date, which is much easier to answer than "when will you pay?"

Variation: if you texted with this client before, send a one-line text with the link on the same day.

Message three: the day-14 call

By now an email has failed twice, so call. Calls are uncomfortable and effective, because a person has to answer something. Say it in about a minute.

"Hi Beatriz, it's Wren from Pell Studio. I'm calling about invoice 1042 for $3,200, which was due two weeks ago. Is there anything about it I should know, like a question on the work or a problem getting it paid? ... I understand. What date can I count on? ... Great, I'll put October 24 in my calendar. If it's easier, I can take a card over the phone right now."

Three answers you'll hear: "The check's in the mail" (ask for the date it went out), "We have a question about the work" (ask what, listen, and fix it; don't argue the invoice), and "Cash is tight this month" (offer two payments, such as $1,600 now and $1,600 in 30 days, in writing). Write down the date they gave you. Send a short email after the call: "Thanks for talking today. I'll expect payment on October 24."

Variation: if you get voicemail, leave the same message and say you'll email a summary. Don't call again within a day.

Message four: the day-30 final notice

When: 30 days past due, or the day after a promised date passes.

Subject: Final notice: invoice 1042, $3,200, 30 days past due

Hi Beatriz, invoice 1042 is now 30 days past due and I haven't received the payment we discussed on our call. Please pay in full by November 7 using this link: [payment link].

Under the terms in our agreement, a late fee of 1.5 percent per month ($48) applies to overdue balances, and I'll pause work on phase two until the invoice is paid. I'd rather not take that step, and I'm glad to talk this week if there's a problem.

Wren Okoye
Pell Studio, 88 Canal Street, Rochester, NY
wren@pell-studio.example

Why it works: it states the amount, the days late, the deadline and the consequence in plain order, with a door left open. Bad feeling mostly comes from vague threats; a specific date reads as business.

Variation: if the client has gone silent entirely, add that your next step is a demand letter or small claims court, but only say so if you're ready to follow through.

Late fees and pausing work

A late fee only works if it was in your contract or on the invoice before the work started. The $48 here is 1.5 percent of $3,200. Some states cap interest on late payments or require specific wording, so check yours, or ask an attorney before you rely on one. Pausing work is the same: it's much cleaner if your agreement says you may. Without that, pausing can create its own dispute. Tell the client in writing before you stop, give a date, and keep your tone neutral.

Make the next invoice easier to pay

The cheapest collection is the one you never chase. Put a card or bank payment link on every invoice. Take a deposit up front (a third to a half is common) and send the invoice the day the work is done instead of the end of the month. Shorter terms, like net 15 instead of net 30, move the whole clock. If you write quotes in Rocketship, the customer signs online and, once Stripe is connected, sees a pay button or a deposit after they accept, so the first payment happens before you start. The quote-writing guide covers where the payment terms belong. For fees when a client doesn't show up, the wording in the no-show email template uses the same approach.

Chasing money is part of the admin that quietly eats a week; the four hours nobody invoices for and the week you lost to admin count what it costs. The website is not the product makes the case for one system. And if the unpaid work began as a quote you sent, start with how to follow up on a quote.

Getting paid is the last step of getting a customer, and it goes smoothly when the earlier steps were clear. Rocketship finds the buyers, emails them from your own Gmail, follows up, and books the meeting on its own. Plans that get you customers start at $24.99 a month (Launch), and every monthly plan starts with a 7-day free trial, card required.