What Is Net 30?
Full payment is due within thirty calendar days of the invoice date.
Detailed Explanation
It is a common B2B default. Unless the contract says otherwise, the 30 days are calendar days counted from the invoice date, so weekends and holidays count. Variants change the start point: Net 30 EOM counts from the end of the invoice month, and Net 30 ROG from receipt of goods.
Example
Invoice dated March 1 is due by March 31 under Net 30.
Why It Matters
Sets clear expectations for when cash should arrive, and gives you a due date to measure late payment against.
Key facts
- Net 30 means the buyer must pay within 30 calendar days of the invoice date, not 30 business days, unless the contract says so. Put the actual due date on the invoice so nobody has to count.
- Paying on time is not the norm everywhere: Xero measured invoices from US small businesses on its platform as paid an average of 7.8 days late in the quarter to December 2025 (Xero Small Business Insights, March 2026), so Net 30 money often arrives closer to five weeks after the invoice date than four.
- In Intuit QuickBooks' 2026 vendor survey of US small businesses, 55% of those offering Net 30 terms had overdue invoices, compared with 26% of those requiring immediate payment. That is a correlation in one survey, not proof that Net 30 causes late payment.
- US federal agencies generally must pay within 30 days of receiving a proper invoice under the Prompt Payment Act rules, and owe an interest penalty if they pay late (US Treasury Bureau of the Fiscal Service).
- There is no general federal cap on payment terms between private US businesses. In the EU, the Late Payment Directive (2011/7/EU) limits business-to-business terms to 60 calendar days unless expressly agreed and not grossly unfair to the creditor, and public authorities to 30 days in most cases.
- UK large businesses paid their suppliers in 32 days on average in 2025, based on 11,178 payment practice reports (Department for Business and Trade, July 2026).
How it shows up in practice
Illustrative example: a design studio invoices a software client $12,400 for a brand refresh on March 3 with Net 30 terms, so payment is due April 2. The invoice shows that date and a late-payment clause the studio has checked is lawful in the client's state. Knowing that small-business invoices are often paid a week or so late, the studio's cash plan assumes the money lands in the second week of April, and it sends a polite reminder a few days before April 2 rather than waiting until the invoice is overdue.
Common mistakes
- Counting 30 business days when the contract says calendar days, or the other way round.
- Leaving the start date ambiguous: state whether the 30 days run from the invoice date, receipt of the invoice or receipt of goods.
- Writing only "Net 30" without the actual due date.
- Offering Net 30 by default to brand-new customers without a deposit or credit check.
- Not stating a late-fee or interest clause in the contract and on the invoice, so there is nothing agreed to enforce when payment slips.
Frequently asked questions
Is net 30 calendar days or business days?
Calendar days, unless your contract or invoice explicitly says business days. Printing the actual due date on the invoice avoids the argument.
Does net 30 start from the invoice date or the receipt date?
From the invoice date unless the contract says otherwise. Some terms count from receipt of goods (Net 30 ROG) or the end of the month (Net 30 EOM), and US federal agencies count their 30 days from receipt of a proper invoice. State the start point on the invoice.
Should I offer net 30 to new clients?
Not automatically. Shorter terms, a deposit or a smaller first engagement limit your risk until the client has a payment history with you. Net 30 suits established business clients whose payment record you know.
What's the difference between net 30 and 2/10 net 30?
Net 30 means full payment in 30 days. 2/10 Net 30 adds a 2% discount if the buyer pays within 10 days; otherwise the full amount is due in 30 days. Paying 20 days early to save 2% works out to about 36.5% a year on a simple basis (2% x 365 / 20), so the discount is expensive for the seller.
Can I charge a late fee if a net-30 invoice isn't paid on time?
Only on terms that are lawful where the client is based. In the US, late fees and interest are a matter of contract and state law, so agree the rate in the contract, print it on the invoice and check your state's limits. In the UK and EU, statutory interest on late commercial payments can apply even without a clause. This is general information, not legal advice.
Can I set net 30 terms in InvoiceQuickly?
Yes. New invoices default to 30-day terms, and you can change the default in your settings or set a different due date on each invoice. The PDF prints the due date, and anything you type in the terms field, such as "Net 30" and your late-fee clause, appears in the terms section.
Related Resources
Last verified: October 2026
Related Payment Terms Terms
Useful, occasional notes
Get invoicing tips that actually help
Join the InvoiceQuickly update list for practical invoicing advice and product news.
No spam, ever. Unsubscribe anytime.