Net 30, Net 60, Net 90: How Invoice Payment Terms Really Work

"Net 30" is the most common payment term on invoices, and one of the most commonly misread. Freelancers tend to read it as "I'll get paid in about a month." Some clients read it as "we'll get to it eventually." The term does have a precise meaning — but the details, like when the clock starts and whether weekends count, depend on what your contract actually says. Here is how the standard terms work, and where the traps are.

What "net" actually means

Net 30 means the full ("net") invoice amount is due within 30 days. Net 60 and net 90 work the same way with longer windows. By default, those are calendar days — weekends and holidays count — unless your contract explicitly says business days. That distinction matters more than it looks: 30 calendar days is about a month, while 30 business days stretches to roughly six weeks once weekends are skipped. If a contract just says "net 30" with no qualifier, the ordinary reading is calendar days. You can check what date lands 30 days out with the 30 days from today calculator, and if your agreement does count working days, see how to count business days for the conventions.

When the clock starts

This is where disputes actually happen. "Net 30 from what?" has at least three common answers:

Invoice date — the date printed on the invoice. This is the most common default.
Receipt date — the date the client received the invoice. Some contracts specify this, which rewards clients for slow inboxes.
End of month (EOM) — "net 30 EOM" means 30 days after the end of the month the invoice was issued in. An invoice dated March 3 under net 30 EOM isn't due until April 30.

There is no universal rule; the contract controls. If your agreement is silent, most businesses treat the invoice date as day zero. The practical fix is simple: don't make anyone do the math. Print the actual due date on the invoice — "Due: August 16, 2026" — right next to the terms.

Early-payment discounts: the 2/10 net 30 math

You'll sometimes see terms like 2/10 net 30. That means: take a 2% discount if you pay within 10 days; otherwise the full amount is due in 30. On a $1,000 invoice, paying by day 10 costs $980; paying on day 30 costs $1,000. From the client's side, skipping the discount means paying $20 to hold onto $980 for an extra 20 days. Annualized the usual way, that works out to an effective rate of roughly 37% — far more expensive than most short-term borrowing, which is why finance departments often take the discount. From your side as the seller, offering 2/10 net 30 trades a small haircut for much faster cash. Whether that trade is worth it depends on how badly you need the money now.

Why net 60 and net 90 squeeze you

Longer terms turn you into an interest-free lender. Your costs — software, subcontractors, your own rent — come due immediately, while payment arrives two or three months later. And the real gap is usually longer than the stated term: if you work through a month before invoicing, net 60 means you're paid roughly 90 days after you started the work. Large companies push net 60 and net 90 precisely because holding cash longer benefits them. You don't have to accept the first number offered: counter with net 30, ask for a deposit or milestone payments, or price the delay into your rate. It also pays to know your real numbers — use the days between calculator to measure how long each client actually takes from invoice date to payment date. A "net 30" client who reliably pays on day 55 is a net 55 client.

Late fees and chasing overdue invoices

A common convention is a late fee of 1% to 1.5% per month on overdue balances, but two caveats apply. First, a late fee is generally only enforceable if the client agreed to it in advance — in the contract, not just stamped on the invoice after the fact. Second, the maximum rate you can charge varies by jurisdiction, and some regions (the UK and EU, for example) have statutory interest rules for late commercial payments. Check the rules where you operate rather than assuming. For chasing: send a friendly reminder a few days before the due date, follow up the day after it passes, and escalate in writing at set intervals. A clause letting you pause work on accounts more than 15 or 30 days overdue gives those emails real weight.

Whatever terms you settle on, anchor them to concrete dates instead of leaving clients to count. If your contract runs on calendar days, the days from today calculator gives you the exact due date to print on the invoice; if it counts working days, the business days from today calculator skips weekends for you.