What Is Net 45? Payment Terms Explained

When a supplier asks for Net 30 and a buyer pushes for Net 60, where do they meet? Often at Net 45. This term rarely appears as anyone's first choice. It is a negotiated outcome, the middle ground between the small-business standard and the long terms large buyers prefer, and that origin shapes everything about how it is used.

This guide explains what Net 45 means, where it shows up, and why it is so often the product of a negotiation rather than a default. Because Net 45 is best understood by what sits on either side of it, the guides on what Net 30 means and what Net 60 means are useful reference points alongside this one.

What Net 45 means

"Net" refers to the net amount due, the full invoice total with nothing deducted. "45" is the number of days the buyer has to pay. So Net 45 means the full invoice is due within 45 days of the invoice date. An invoice dated April 1 with Net 45 terms is due May 16.

Those 45 days are calendar days by default. Net 45 lands a little past the six-week mark, which is why it feels longer than Net 30 in practice but does not stretch into the cash-flow strain that Net 60 can create for a mid-sized supplier.

Calendar days versus business days

As with every net term, the default is calendar days unless the contract states business days. Net 45 in calendar days is about six and a half weeks. The business-day version is uncommon at this length, but where a contract specifies "Net 45 business days," the result is roughly nine calendar weeks once weekends are removed, which pushes real payment well past the two-month mark. To pin down the exact due date for any invoice and counting method, the invoice due date calculator supports Net 45 along with the other standard terms.

Where Net 45 shows up

Net 45 is a mid-market term. It is common in business-to-business relationships that are too large for the casual Net 30 of small-vendor work but not large enough, or not so buyer-dominated, that Net 60 has become the norm. Manufacturing suppliers, mid-tier distributors, and established service providers selling into corporate buyers all see Net 45 regularly. It also appears in retail and consumer-goods supply chains, where a retailer with real purchasing power negotiates terms beyond the supplier's preferred 30 days but stops short of the 60 or 90 that the largest chains command.

The pattern is consistent: Net 45 turns up where the buyer has enough leverage to extend terms past Net 30, but the supplier has enough standing to resist going all the way to Net 60. That balance of power is exactly what produces a 45-day compromise.

Net 45 as a negotiation tool

The most useful way to think about Net 45 is as a settling point. A buyer who is asked for Net 30 but wants to conserve cash will often counter with Net 60; the supplier balks, and 45 becomes the figure both can live with. From the buyer's side, every extra day of terms is free financing: the goods or services are in hand, and the money stays in the buyer's account fifteen days longer than a Net 30 would allow. Across a large volume of purchases, that extra float is real working capital.

From the supplier's side, conceding 45 days instead of holding firm at 30 is a cost, but often a worthwhile one. If the alternative is losing the account to a competitor who will accept Net 60, granting Net 45 keeps the business while limiting the damage to cash flow. Suppliers who give ground on terms sometimes claw value back elsewhere, a slightly higher price, a minimum order commitment, or an early payment discount that lets a buyer who does have cash pay sooner at a small saving. Understanding how a 15-day extension affects your own collections is where a metric like days sales outstanding earns its keep: it translates the term length into the cash impact you actually feel.

The cost of the extra fifteen days

It helps to put a number on what Net 45 costs the supplier relative to Net 30. The supplier is financing the buyer for an extra 15 days on every invoice. On a single 10,000 invoice that is modest, but a supplier turning over a few million a year in receivables is effectively extending an interest-free loan equal to roughly two extra weeks of sales at any given time. Whether that is acceptable depends on the supplier's own cost of capital and margins. A business with comfortable cash reserves can absorb it as the price of keeping a good customer. A thinly capitalised one may need to push back, or to fund the gap, which is its own cost.

This is the quiet reason Net 45 is negotiated rather than offered. Neither side loves it. The buyer would prefer 60, the supplier would prefer 30, and 45 is the number that leaves both slightly dissatisfied, which is often the sign of a fair compromise.

Net 45 compared to other terms

Net 45 sits one step up the ladder from the Net 30 default and one step below Net 60. Moving from Net 30 to Net 45 is the most common single concession a supplier makes to a larger buyer, just as moving from Net 30 down to Net 15 is how a small seller tightens cash flow in the other direction. Net 45 is rarely a starting position and almost always a destination, which is what makes it such a useful read on the balance of power in a B2B relationship.

How to negotiate to or away from Net 45

Because Net 45 is a settling point, the useful question is how to steer a negotiation toward or past it. A supplier defending Net 30 against a buyer pushing for longer terms has a few levers. The strongest is to make the extension conditional: agree to Net 45 in exchange for a volume commitment, a longer contract, or a modest price increase that prices in the cost of the extra float. Offering an early payment discount alongside the longer term is another route; it lets a cash-rich buyer pay sooner at a small saving while preserving the headline 45-day term for those who need it.

A buyer trying to move a supplier from Net 30 to Net 45 has the mirror image of those levers. The cleanest argument is order size: a buyer placing significantly more business than the supplier's typical customer has a fair claim to terms that reflect the relationship's value. Consistency of payment is another. A buyer with a spotless record of paying on the dot can credibly argue that extending to Net 45 carries no added risk for the supplier, only a timing change. Buyers who combine a strong payment history with real volume are the ones who win these negotiations without much friction.

What rarely works for either side is treating the term as a take-it-or-leave-it demand. Payment terms are one of the more flexible parts of a commercial agreement precisely because the cost to each party is quantifiable. A supplier knows roughly what 15 extra days of float costs them; a buyer knows what it is worth. When both sides put a number on it, the negotiation becomes a trade rather than a standoff, and Net 45 emerges not as a defeat for either party but as the price at which the trade clears.

It also helps to write the term so there is no ambiguity later. "Net 45 from invoice date" and "Net 45 from delivery" can differ by a week or more depending on shipping time, and a vague term invites a dispute exactly when an invoice comes due. Pin down the start date, the counting convention, and the weekend rule in the contract, and the 45-day term will run cleanly for the life of the relationship rather than becoming a recurring point of friction.

When Net 45 drifts into Net 60

A term is only as real as the process behind it. Net 45 that is agreed on paper but paid on day 58 every month is, in practice, Net 60 with extra steps, and the gap between the two is a common source of quiet friction. The drift usually comes from process rather than bad faith: an invoice that arrives mid-cycle waits for the next approval run, sits behind a purchase-order match, and clears on the payment date that follows, which can land well past day 45 even when no one intended to pay late.

For a supplier, the fix is to measure actual days-to-pay rather than the term on the contract. If a Net 45 account consistently pays in 58 days, the relationship is really running on Net 60, and the supplier is financing the difference whether or not the paperwork says so. Surfacing that gap, politely and with the numbers, is often enough to tighten it, because many buyers genuinely do not realise their process adds two weeks to every stated term. For the buyer, the lesson is that agreeing Net 45 and routinely paying at 58 erodes the goodwill the term was meant to build. If your cycle really needs 60 days, it is cleaner to negotiate Net 60 openly than to win Net 45 on paper and quietly miss it.

FAQ

Does Net 45 mean 45 business days or 45 calendar days?

Net 45 traditionally means 45 calendar days, including weekends and holidays. If a contract intends business days, it will usually say "Net 45 business days" explicitly, which works out to roughly nine calendar weeks. When unspecified, calendar days is the default in most commercial contexts.

When does the 45-day period start?

It starts on the invoice date unless the contract says otherwise. Some agreements start the count on the delivery date, the goods-received date, or the date a service is completed. With a longer term, a delivery-based start date can push real payment noticeably further out, so check which one your contract uses.

Why would a supplier agree to Net 45 instead of Net 30?

Usually to keep a customer who has the leverage to demand longer terms. Conceding 45 days rather than losing the account to a competitor offering Net 60 is often the better trade. Suppliers frequently offset the cost with a higher price, a volume commitment, or an early payment discount for buyers who can pay sooner.

Is Net 45 common, or should I be suspicious of it?

It is a normal, established mid-market term, not a red flag. It appears wherever a buyer has enough purchasing power to extend past Net 30 but the supplier holds enough standing to resist Net 60. What matters is that the term is agreed in writing and applied consistently, not the specific number of days.

What happens if a Net 45 due date falls on a weekend or holiday?

Most contracts and conventions roll the due date forward to the next business day. On a longer term the shift is a small fraction of the total, but it is still worth confirming the convention with your counterparty if the agreement does not address it explicitly.