Net 45 payment terms: what it is and what to include

What Net 45 payment terms are

“Net 45” is shorthand for a credit arrangement in which the buyer owes the net (full, undiscounted) invoice amount within 45 days. The word “net” signals that no early-payment discount is baked into the headline figure, and the number is simply the count of days the buyer has to pay. It is one point on a familiar scale that runs from net 15 and net 30 through net 60 and net 90, with the higher numbers extending more credit to the buyer and tying up more cash for the seller.

Net 45 is a middle-ground term. It is more generous than the common net 30 default, which makes it attractive to buyers with longer internal approval cycles, yet it is tighter than net 60 or net 90, which limits how long the seller waits to be paid. Sellers sometimes pair it with an early-payment incentive written as “2/10 net 45,” which offers a 2 percent discount if the buyer pays within 10 days while still allowing the full 45 days at the net price. Whatever the structure, Net 45 is a contractual promise rather than a courtesy, and it is enforceable through the underlying agreement, the invoice, and, for sales of goods, the Uniform Commercial Code as adopted in the governing state.

Key terms and clauses to include

The number 45 means little until the surrounding language pins down exactly what it counts and what happens when the deadline passes. Strong Net 45 language typically addresses:

• Trigger event and start date. State precisely when the 45 days begin: the invoice date, the delivery date, the date the buyer receives a conforming invoice, or the date of acceptance. Ambiguity here is the single most common source of payment disputes.
• Definition of “days.” Specify calendar days rather than business days, and describe how a due date that lands on a weekend or holiday is handled.
• Invoice requirements. Define what makes an invoice valid and clock-starting, such as a purchase order number, itemized line items, tax details, and a remittance address. An invoice that does not meet the standard should not start the countdown.
• Accepted payment methods and currency. List the methods you will accept (ACH, wire, card, check), state who bears any processing fees, and fix the currency of payment.
• Late-payment consequences. Set a finance charge or interest rate for overdue amounts, subject to state usury caps, and state whether the buyer must reimburse collection costs and reasonable attorney fees.
• Early-payment discount. If you offer one, spell out the percentage, the qualifying window, and how the discount is calculated.
• Disputed invoices. Provide a short window for the buyer to raise a good-faith dispute in writing, require timely payment of the undisputed portion, and describe how disputes are resolved.
• Suspension and set-off. Reserve the right to pause further work or withhold shipments for nonpayment, and address whether either party may set off amounts owed.
• Taxes and governing law. Allocate responsibility for sales, use, and other applicable taxes, and name the governing law and venue.

When to use Net 45 payment terms

Net 45 fits business-to-business relationships where the buyer needs time to route an invoice through accounts payable, match it to a purchase order, and obtain internal approvals. It is common for larger orders, procurement-driven buyers, and established customers whose creditworthiness the seller has already assessed.

For a seller, offering Net 45 can be a competitive lever that wins deals against rivals who insist on net 30, but it also lengthens the cash conversion cycle and raises the working-capital cost of carrying receivables. For a buyer, negotiating Net 45 preserves cash and smooths outflows, though pushing for even longer terms can strain a supplier relationship. The right choice usually reflects the size of the transaction, the strength of the counterparty, industry norms, and how much each side values cash timing versus goodwill. When a new customer has no payment history, many sellers start with shorter terms or partial prepayment and extend Net 45 only after the account proves reliable.

Common pitfalls

The most frequent and costly mistake is an undefined start date. If the contract says “net 45” but never states whether the clock runs from the invoice date or the delivery date, both sides can calculate different due dates in good faith, and the receivable ages faster than anyone intended. Closely related is the missing or defective invoice: if a valid invoice is what starts the clock and none is ever sent, the obligation can drift indefinitely.

A second pitfall is a late-payment clause that is silent, vague, or set above the legal ceiling. A finance charge that exceeds the applicable state usury limit may be unenforceable, and no charge at all removes any incentive to pay on time. Sellers dealing with government or prime-contractor buyers should also confirm whether prompt-payment statutes impose their own timelines and interest that override the negotiated term.

Other recurring problems include failing to check the counterparty’s credit before extending 45 days of unsecured trade credit, staying silent on how disputed invoices are handled, and letting the purchase order, the invoice, and the master agreement carry conflicting terms so that a battle of the forms decides which controls. Finally, many organizations simply lose track of due dates and early-payment discount windows, missing the savings a “2/10 net 45” arrangement was meant to capture and letting overdue balances slip through unnoticed.

Tie it to disciplined contract management

Net 45 payment terms are only as good as the systems that watch them. A single misread due date can turn a healthy receivable into a collection problem, and a discount window missed by a day is money left on the table. Keeping every agreement in a searchable contract repository, standardizing your payment language with reusable templates, and relying on renewal and deadline alerts to surface each Net 45 due date turns a scattered set of promises into a managed process. Pactolane’s contract repository, templates, and deadline alerts support that discipline, while PactAI can extract the key payment terms and dates from a signed contract and flag exposure for a human to review. There is no downloadable form here; treat this as general legal information rather than legal advice, and have counsel tailor the exact wording to your transaction and jurisdiction.