Net 30, net 60, net 90: what payment terms actually mean for your cash flow

Net 30 means the full invoice amount is due 30 days after the invoice date; net 60 and net 90 mean 60 and 90 days. In practice, terms are the length of the interest-free loan you extend to each client, and the cost of that loan is real: a business invoicing $250,000 a month on net 60 is permanently carrying about $500,000 of its clients' money, twice what it would carry on net 30. The stated term is only half the picture. The other half is how late clients actually pay against it, and for most B2B service businesses that gap is 15 to 30 days.

This piece explains the common terms, how to put a dollar figure on them, why stated and real terms diverge, and how to choose and enforce terms without losing clients.

What do the common payment terms mean?

Two details that cause confusion. First, 'net' means the full amount, as opposed to a discounted amount; it has nothing to do with taxes. Second, the clock usually starts on the invoice date, not the date the client received or approved it, which is why invoicing promptly matters as much as the term itself.

What do your terms cost you?

Every day of terms is a day of revenue sitting in receivables instead of the bank. The quick formula: monthly invoicing ÷ 30 × days of terms ≈ cash permanently tied up.

That money gets funded somehow: a line of credit at interest, factoring at a percentage per month, or growth you turn down because you cannot float it. Moving one large client from net 60 to net 30 can release more cash than a good quarter of new sales.

Why stated terms and real terms are different

The table above assumes clients pay on the due date. They do not. Across US B2B, 43% of the value of credit sales is overdue at any given time. For a typical service business on net 30, the actual average days to pay lands somewhere between 40 and 55, which means your real terms are net 45 or net 50 whatever the invoice says.

The gap between stated and real terms is mostly a follow-up gap. Clients do not choose to pay on day 48; your invoice sits in an AP queue and nobody on your side asked about it on day 31. Businesses that follow up the day after the due date, every time, close most of that gap. Businesses that do not are effectively offering net 50 to everyone while pretending they offer net 30.

You can measure your real terms with days sales outstanding (DSO), which we cover in a separate post linked below. If your DSO is more than about 10 days above your stated terms, the terms are not the problem; the follow-up is.

How do you choose terms?

• Start from your own cash cycle. If you pay contractors weekly (staffing) or carriers in days (freight), long client terms are directly funded by you. Push for the shortest terms the market will bear and price longer terms into your rate.
• Match the client's AP reality, then enforce it. A large enterprise client will not do net 15. Agree net 30 or net 45, get it in the contract, and then actually hold them to it. A term you never enforce is not a term.
• Shorter for new clients. Due on receipt or net 15 for the first few invoices, extending to net 30 once they have a payment history with you.
• Consider 2/10 net 30 carefully. A 2% discount for paying in 10 days is an annualized cost of roughly 36% if the client would otherwise have paid on day 30. It is expensive money. It makes sense when cash is tight and the client is reliable; it makes no sense as a default.
• Put late fees in the terms even if you rarely use them. You cannot charge a late fee you did not agree to in advance. Having it in the terms gives you a lever at the escalation step.

How do you enforce terms without losing clients?

By being consistent rather than aggressive. Clients do not resent a vendor who follows up on day 31 every time; they resent surprises. A short, friendly note the day after the due date, escalating on a fixed schedule, from your own name, is how a term becomes real. It also has a side effect: clients who learn that your invoices get followed up on start paying you before the vendors whose invoices do not.

The full sequence, with templates, is in our overdue-invoice follow-up guide. The short version: day 1 friendly, day 7 direct, day 21 firm with a date, day 45 escalate to a decision maker, day 60 final notice. That sequence is what turns net 30 on paper into net 30 in the bank.

Your real terms are whatever you consistently enforce. Everything else is a suggestion.

Where Reeve fits

Reeve enforces the terms you set. It reads each invoice's due date from QuickBooks Online, starts following up in your name the day after it passes, escalates on schedule, and stops the moment payment posts. It also shows you your real terms: DSO and days-to-pay by client, so you can see which accounts are quietly on net 55 and have the conversation before it becomes net 70.