KLM Labs

Net 30 invoice terms: what they mean and how to write them

Net 30 means the customer has 30 days from the invoice date to pay. An invoice dated November 2 is due December 2.

Free. No sign-up. US Letter, 1 page.

About the Invoice Maker app
Made with Invoice Maker. US Letter, 1 page.

The sample, line by line

Invoice INV-2207 from Calloway Sign & Print to Northgate Property Management. Issued 2 Nov 2026. Due 2 Dec 2026.

DescriptionQtyUnit priceAmount
Aluminum property signs, 24x36, printed both sides 6 $128.00 $768.00
Installation, two sites (hours) 3.5 $70.00 $245.00
Design changes, round 2 (hours) 1 $65.00 $65.00
Subtotal$1,078.00
Sales tax (9.75%)$105.11
Total$1,183.11

How to pay, under the totals

Please include invoice number INV-2207 with your payment. Pay by ACH or check.

The note at the bottom

Terms: Net 30. Payment is due by December 2, 2026. A late fee of [x]% per month, as set out in our signed service agreement, applies to balances unpaid after the due date. Sample tax rate and late fee: use your own local rate and the terms your customer agreed to.

What does net 30 mean on an invoice?

“Net” is the full amount; “30” is the days the customer has to pay. Net 15 and net 60 work the same way.

Does net 30 include weekends?

Yes, it counts calendar days. Print the due date, so nobody has to count.

How to write net 30 payment terms

Agree the terms in your quote, then print the term and the due date together. Copy and adapt:

Terms: Net 30. Payment is due by December 2, 2026.

Please include invoice number INV-2207 with your payment. Pay by ACH to [account details] or by check to [your business name].

In Invoice Maker, the first line goes in the notes, the second in Payment instructions (Settings > Invoice defaults).

Net 30, net 15 or due on receipt?

Terms Due Good for
Due on receipt The day you send it One-off jobs, small amounts
Net 7 7 days after the invoice date Short jobs, when you want cash fast
Net 15 15 days after Repeat customers you know
Net 30 30 days after Businesses with an accounts team
Net 60 or 90 60 or 90 days after Large companies, if you can wait

What does 2/10 net 30 mean?

The customer can take 2% off if they pay within 10 days; otherwise the full amount is due in 30. Invoice Maker has no discount line, so put it in the notes.

How do I add a late fee?

Only charge a fee the customer agreed to before the work, and point back to that agreement:

A late fee of [x]% per month, as set out in our signed service agreement, applies to balances unpaid after the due date.

1.5% a month is 18% a year. Interest limits differ by state, so check yours. This is not legal advice.

Set net 30 in Invoice Maker

In Settings > Invoice defaults, choose Within 30 days. Each new invoice is then due 30 days after its date. Past that, a sent invoice shows as overdue.

Last updated . The businesses, people and figures in the samples are made up.