Invoice Payment Terms Explained: Net 30, Net 15, Due on Receipt

Invoice payment terms are the conditions that state when and how a client must pay you. Net 30 means the full balance is due 30 days from the invoice date, Net 15 means 15 days, and Due on Receipt means payment is expected immediately. Terms also cover late fees, deposits, accepted payment methods, and early-payment discounts.

Key takeaways

• Net 30, Net 15, and Net 7 all count calendar days from the invoice date, not from the delivery date or the day the client opens the email.
• Due on Receipt is the fastest term on paper but often gets treated as Net 7 or Net 14 in practice by AP departments running batch payment runs.
• 2/10 Net 30 offers a 2% discount for paying within 10 days — an effective annualized cost of roughly 36% to you, so use it deliberately.
• EOM terms are due at the end of the month; "Net 30 EOM" means 30 days after the end of the invoice month, which can stretch a July 2 invoice to August 30.
• A 1.5% monthly late fee (18% per year) is a common US standard, and it's only enforceable if agreed in advance in a contract.

What do the common invoice payment terms mean?

Most confusion comes from assuming everyone reads these the same way. They don't, which is why you should always print a calendar due date next to the term.

Notice how much room "Net 30" has to move. Net 30 from July 30 is August 29. Net 30 EOM from the same date is August 30. On a July 2 invoice, that same EOM variant pushes payment out to August 30 — a 59-day wait. Read the term, not the number.

Which payment terms should you actually use?

Match the term to the client and the size of the job, not to what sounds professional.

For new clients and small jobs under roughly $1,000, use Due on Receipt or Net 7. There's no relationship history to protect and no reason to extend credit.

For established freelance and small-business clients, Net 15 is the sweet spot. It's short enough to keep cash moving and standard enough that no one pushes back. Plenty of solo contractors default to Net 15 and never hear a complaint.

For mid-size and enterprise clients, expect Net 30 and sometimes Net 45. Big companies run fixed AP cycles and their systems are configured around those windows. Fighting it wastes goodwill; timing your invoice to land right before their approval cutoff does not.

For anything over a few thousand dollars, split it. A 50% deposit with the balance due on delivery protects your time and filters out clients who were never going to pay. Milestone billing does the same for long projects — invoice 25% at four checkpoints rather than 100% at the end.

Whatever you land on, write the terms into the contract before work begins. Terms that first appear on the invoice are terms a client feels entitled to renegotiate. More on that in our guide to what to include on an invoice.

Are early-payment discounts worth offering?

Sometimes, but run the math before you commit.

2/10 Net 30 gives the client a 2% discount for paying 20 days early. On a $5,000 invoice, that's $100 to get paid on day 10 instead of day 30. Annualized, you're paying about 36% for those 20 days of cash — far more expensive than most credit lines.

That doesn't make it wrong. If you're covering payroll or materials and the alternative is a card balance at 24%, a 2% discount is cheap. If your cash position is fine, you're donating margin.

A middle path: offer the discount selectively to clients who habitually pay at day 45, and skip it for the ones who already pay on time. There's no reason to discount behavior you're already getting for free.

Some businesses use 1/10 Net 30 instead, which halves the cost to roughly 18% annualized and still moves plenty of clients.

How do late fees work on invoices?

A late fee is a charge added to an overdue balance, usually stated as a monthly percentage. In US small business practice, 1.5% per month — 18% annually — is a common standard, and some firms use 1% or a flat fee for small invoices.

Three conditions have to be met for a late fee to be worth anything:

1. It's agreed in advance. The clause belongs in your contract or accepted proposal, not just on the invoice. A fee that appears for the first time on an overdue notice is easy to refuse.
2. It's stated clearly on every invoice. "Balances unpaid after the due date accrue 1.5% per month." Repetition is what makes it feel inevitable rather than punitive.
3. It's legal where you operate. Some states cap interest rates on commercial debts, and rules differ for consumer transactions. Check your state's limits before setting anything above 1.5% monthly.

Apply fees consistently or don't apply them at all. Clients notice when a fee shows up only after a relationship sours, and inconsistency undermines the clause the next time you need it. Our breakdown of late payment fees covers wording and calculation.

How do you write payment terms so clients actually follow them?

Ambiguity is the enemy. Three rules cover most of it.

Print the calendar date. "Net 30" makes the client do math. "Net 30 · Due August 29, 2026" doesn't. Put the due date in bold near the total, not buried in a footer.

Say what "paid" means. Does the clock stop when the client initiates an ACH transfer or when funds land in your account? For check payments, is it the postmark or the deposit? One sentence prevents a week of arguing: "Payment is considered received on the date funds clear."

List the payment methods with the details filled in. ACH routing and account number, a card link, a check mailing address. Every step you make the client find is a step that delays you.

Then put the invoice number in the email subject line — "Invoice 2026-014 — $3,200 due Aug 29" — because AP teams search by number. If you're assembling all this by hand each time, a free invoice generator will handle the due-date math and keep the layout consistent.

Frequently asked questions

Does Net 30 mean 30 business days or calendar days?

Calendar days, unless the contract explicitly says business days. Net 30 on a July 30, 2026 invoice means payment is due August 29, 2026. If you need business days, spell it out, because almost nobody assumes it.

When does the payment clock start — invoice date or delivery date?

The invoice date, in standard practice. That's why you should send the invoice the same day you deliver rather than letting it sit for a week. Some enterprise contracts start the clock on receipt or on approval instead, so read the terms your client's procurement team sends over.

Can I change payment terms for an existing client?

Yes, with notice and in writing. Tell them the new terms take effect on a specific date and apply to work commissioned after that date, not retroactively to open invoices. Most clients accept a shift from Net 30 to Net 15 if you give a few weeks' warning.

What's the difference between Net 30 and 30 days EOM?

Net 30 counts 30 days from the invoice date. 30 days EOM counts 30 days from the last day of the month the invoice was issued. On a July 2 invoice, Net 30 is due August 1 while 30 days EOM is due August 30 — a 29-day difference from the same starting document.

Should I offer Due on Receipt to every client?

It works well for new clients, small jobs, and consumer-facing work. It works poorly with corporate AP departments that process payments in scheduled batches, where "immediately" realistically means the next payment run. For those clients, Net 15 with a clear date usually produces faster actual payment than Due on Receipt does.

Sources

• U.S. Small Business Administration, managing business finances — sba.gov

This article is general information, not tax or legal advice.