Payment terms on an invoice: what to write, and what it commits you to

A payment term is the difference between an invoice that gets paid on a date and one that gets paid eventually. It is two lines of text, and most invoices get one of them wrong.

By Naeem AhmedReviewed 18 September 20265 min read

A term and a due date are one fact, written twice

"Net 30" and "due 31 October" say the same thing about an invoice issued on 1 October. That is why they must never be typed independently — the moment they disagree, the customer will pay to whichever is later and they will be right to.

In the Invoice Generator the due date is not stored as a separate decision. Pick a term and the due date is filled in from the issue date. Type a due date instead and the term simply reads as whatever gap you created. There is only ever one value being set, so the two cannot drift apart.

Example: an invoice issued 1 September
Term: 30 days
Due 1 October
Term: 60 days
Due 31 October
Term: 90 days
Due 30 November
Custom: 45 days
Due 16 October

Month lengths are handled as calendar arithmetic, so 1 September plus 60 days is 31 October rather than "two months later".

What the common terms mean

Terms you will see, and what they actually require
TermPayment is due
Due on receiptImmediately. Realistically, within a few days.
Net 7 / Net 14Within 7 or 14 days of the invoice date.
Net 30Within 30 days of the invoice date. The common default.
Net 60 / Net 90Within 60 or 90 days. Usual for large buyers; hard on cash flow.
50% upfront, balance on deliverySplit. Two invoices, or one with a stated schedule.
EOM 3030 days from the end of the month the invoice falls in.
2/10 Net 302% off if paid within 10 days; otherwise the full amount at 30.

Wording you can use

Short and specific beats formal and vague. Each of these is a complete payment-terms block.

Standard 30 days
Terms
Payment due within 30 days of the invoice date, by 31 October 2026. Please quote invoice INV-1042 with your transfer.
Deposit and balance
Terms
50% (SAR 1,000.00) due before work begins. Balance of SAR 1,000.00 due within 14 days of delivery.
Early-settlement discount
Terms
Payment due within 30 days. A 2% discount applies if settled within 10 days of the invoice date.
With a late-payment charge
Terms
Payment due within 30 days. Overdue amounts may carry a late-payment charge of 1.5% per month, as set out in our agreement dated 2 September 2026.

Only write this if it is genuinely in an agreement the customer accepted. A charge that first appears on the invoice is a charge that will be disputed.

Before you promise a term, check you can afford it

Net 60 on a job where you pay your suppliers in 7 days means carrying the cost for the better part of two months. That is a financing decision dressed up as a formatting choice.

  • Work out what the gap costs you before agreeing to it, not after.
  • Ask for a deposit on anything where you buy materials up front.
  • Shorten the term for new customers until they have paid you once.
  • Put the term in the quotation, so it is agreed before the work rather than announced with the bill. See invoice vs quotation.

How the due date behaves in the tool

  1. Choosing a term fills the due date

    30, 60 and 90 days are one click. Anything else is Custom, and you type the date.

  2. Typing a due date changes nothing else

    The term label simply reads as Custom unless the gap you created happens to be exactly 30, 60 or 90 days.

  3. Moving the issue date keeps the term

    On a fixed term the due date is recomputed, so 60 days stays 60 days. On a custom term the gap you chose slides with it — pushing an invoice back a week pushes its due date back a week rather than quietly turning a 45-day term into a 38-day one.

  4. The term is written onto the document

    It prints in the payment-terms field, with an Arabic version alongside it on a bilingual invoice.

Common mistakes

  • A term and a due date that disagree. The customer will use the later one.
  • "Payment due immediately" with no date at all.
  • A late-payment charge that was never agreed anywhere before the invoice.
  • Counting from delivery while the customer counts from receipt of invoice. Say which.
  • No payment reference, so a transfer arrives that you cannot match to an invoice.
  • Agreeing to the buyer's standard terms without reading them — large buyers often default to 60 or 90 days.

Frequently asked questions

Does "Net 30" mean 30 days from the invoice date or from delivery?
By convention, from the invoice date. Because the convention is not universal, write the actual due date on the invoice so there is nothing to interpret.
Can I charge interest on a late invoice?
Only where it was agreed in advance or where your local law provides for it. The rules differ by country, and a charge appearing for the first time on the invoice itself is generally unenforceable and always disputed. This is general information, not legal advice.
What is a sensible default term?
30 days for business customers, and payment on delivery or a deposit for one-off consumer work. Shorten it for a customer you have not invoiced before.
Can I set a term of 45 days?
Yes — choose Custom and type the due date. The 45-day gap is kept if you later move the issue date.

The tools behind this

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About the author

Naeem Ahmed builds and runs BuzPulse. These guides describe tools he has built, and they describe how those tools actually behave — including where they stop.

Corrections and questions: nsglobal6@gmail.com

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