What Should Payment Terms Include for a Small Business?

By Bill Stilwell · Last reviewed October 17, 2026

The short answer

Payment terms are the written rules for how a customer pays you. They state the price or how it is figured, any deposit, when each payment is due, how the customer can pay, and what happens if a payment is late. Put them in your agreement, your estimate, and your invoice, and use the same words in all three.

What this means

Your payment terms answer five questions before the work starts:

How much? The price, or how the price is figured (hourly, per job, per visit).
When? Due dates. “Due on receipt,” “due within 15 days,” or “50% to book, 50% on completion.”
How? The payment methods you accept (see 10.7.1 Payment Methods).
What if it’s late? Any late fee, interest, or pause in work, and when it starts.
What if there’s a problem? How disputes about the bill get handled.

Made-up example: Clearwater Pool Care charges a monthly fee. Its terms say the fee is billed on the 1st, charged to the card on file, and a missed payment pauses service after 10 days. Customers know the rules up front, so nobody is surprised when the pool tech doesn’t show up after a failed card.

Why it matters

Vague terms slow down cash. “Pay when you can” usually means “pay late.”
Surprises cause disputes. A late fee the customer never agreed to often leads to an argument, a chargeback, or a one-star review.
Customers can dispute card charges. Federal law gives card users ways to dispute billing errors and, in some cases, quality problems. Clear, signed terms help you answer a dispute (see 10.7.7 Chargebacks).
You can’t enforce what you didn’t write down. A late fee or a work stoppage rule needs to be in the agreement before the job starts.

Who this applies to

Every business that bills a customer. Businesses paid at the counter, like a cafe, need only simple terms (posted prices and accepted payment methods). Service businesses, project businesses, and anyone who invoices need full written terms.

How to do it

Decide your payment timing. Match it to your costs. If you buy materials up front, ask for a deposit (see 10.7.2 Deposits). On long jobs, use progress payments (see 10.7.3 Progress Payments).
Pick your due dates. Write them as plain dates or plain rules, like “due within 15 days of the invoice date.”
List the payment methods you accept, and any fee for a method. Some states limit fees for paying by credit card, and card networks have their own rules, so check before you add one.
Decide on late fees. If you charge one, say the amount or rate and when it starts. State laws limit late fees and interest, and the limits vary, so check with your state attorney general’s office or an attorney before you set one.
Say what happens after nonpayment. For example, work pauses after a set number of days, or the account goes to collections (see 16.6.5 Late Payments and Collections).
Put the same terms in three places: your agreement (see 11.1.1 Service Agreement), your estimate (see 11.1.2 Estimate), and your invoice (see 10.7.5 Invoices).
Get the customer’s agreement in writing before work starts. A signature or e-signature on the agreement works.
Follow your own terms every time. If you waive a late fee, write down why. Uneven rules lead to arguments.

What proof to keep

The signed agreement with the payment terms
Each invoice showing the due date and terms
Payment receipts and records of late notices sent
Notes on any terms you changed or waived, with dates

Store these in the customer’s file in your customer records (see 15.3 Contact and Company Records).

Common mistakes

Different terms on the estimate and the invoice. Customers will hold you to the one they like best.
Adding a late fee after the fact. If it wasn’t agreed before the work, expect a fight.
“Net 30” with no start date. Say “30 days from the invoice date.”
No rule for paused work. Without one, you keep working for a customer who has stopped paying.
Copying another company’s terms from the internet. Their state’s rules on late fees may not match yours.

When to get help from a pro

Attorney: to review your payment terms and late fee language. Questions to ask:

What late fee or interest rate can I charge in my state?
Can I add a fee for credit card payments here?
What should my agreement say about collections and legal fees?

Bookkeeper or CPA: to make sure your invoice and deposit setup matches how you track income (see 10.7.5 Invoices).

Bill’s note

[Bill: add a short note. For example, the payment schedule SiteSmarty uses for website builds, or a time when unclear terms led to a slow payment and what you changed.]

How I did this for SiteSmarty

[Date I did this:]
[What I actually did, step by step: how I picked SiteSmarty’s due dates, deposit, and late payment rule]
[What it cost and how long it took:]
[What surprised me or what I’d do differently:]
[Screenshot or photo to add, with private info blurred: the payment terms block on a SiteSmarty invoice]
[Result so far:]

Questions people ask

Can I charge a late fee? Often yes, if the customer agreed to it in writing before the work. State laws limit the amount, so check your state’s rules first.

When should payment be due? It depends on your costs and your customers. Many service businesses use “due on receipt” or “due within 15 days.” Pick one and use it every time.

Should I ask for a deposit? If you buy materials or reserve time before the job, a deposit protects you. See 10.7.2 Deposits.

Where do payment terms go? In your agreement, on your estimate, and on every invoice, with the same wording.

Audit check

Question: Does every agreement, estimate, and invoice show the same written payment terms?
Pass looks like: Price or pricing method, deposit, due dates, payment methods, late rules, and nonpayment steps, all agreed before work starts.
Fail looks like: Terms that differ between documents, late fees added after the job, or no written terms at all.
Evidence to collect: A signed agreement, a matching estimate, and a matching invoice from the same job.

Where this fits

Do this first: 7.1.10 Payment Timing, 11.1.1 Service Agreement, 11.1.5 Change Order

Do this next: 11.1.7 Cancellation Policy

Sources

Federal Trade Commission (FTC), "Using Credit Cards and Disputing Charges" (checked October 17, 2026)
Google Business Profile Help, "Tips to improve your local ranking on Google" (checked October 17, 2026)

This page explains general rules and Bill's own experience. It is not legal, tax, or insurance advice. Talk to a qualified professional about your situation.