A payment terms clause sets when money moves, how invoices get raised and disputed, what happens when a payment is late, and whether the seller can stop work until it gets paid. It looks like boilerplate, but it controls cash flow on both sides and decides who carries the cost of a slow-paying customer or a sloppy invoice.
TL;DR
- A payment terms clause covers four things: the timing (net days from invoice), the invoicing mechanics (what a valid invoice is and where it goes), late consequences (interest and suspension), and dispute handling (what a customer may withhold and how).
- The US market standard is net 30 from a correct invoice. Net 45 and net 60 are common with larger buyers; net 15 favors the seller. Tie the clock to a conforming invoice, not just any invoice.
- Late interest is usually 1% to 1.5% per month (12% to 18% annualized), capped at the maximum the governing state allows. State usury and prompt-payment rules can override what you write.
- The seller's most valuable right here is suspension: stop providing the service after notice and a cure period if undisputed amounts go unpaid. Buyers want a good-faith dispute carve-out so they can withhold only the contested line, not the whole invoice.
- The most expensive review miss is a clause that lets a customer withhold the entire invoice over a small disputed item, or a seller suspension right with no notice and no dispute carve-out.
What a payment terms clause actually does
The clause does four jobs, and good drafting keeps them separate.
1. Timing. It sets the payment window (net 30, net 45) and the trigger that starts it. The trigger matters more than the number: "30 days from invoice date" runs from when the seller sends paper, while "30 days from receipt of a conforming invoice" runs from when the buyer gets an invoice that actually matches the contract.
2. Invoicing mechanics. It says what a valid invoice must contain, where it goes, and how often the seller may bill. A buyer with accounts-payable rules wants a PO number, a billing contact, and a defined format, because a non-conforming invoice should not start the clock.
3. Late consequences. It sets interest on overdue amounts and, separately, the seller's right to suspend performance. These are two different remedies and a buyer should not let one collapse into the other.
4. Dispute handling. It defines what a customer may withhold while a charge is contested, the notice the customer must give, and the duty to pay the undisputed remainder on time.
Why it matters: the dollars at stake
Picture a $600,000-a-year services contract billed quarterly at $150,000, net 30, with 1.5% monthly interest on late amounts.
- The customer disputes a single $8,000 line item but, under a loose clause, withholds the entire $150,000 while the parties argue for 90 days. The seller is out the use of $150,000 for a quarter and the dispute was never about most of it.
- Under a tighter clause with a good-faith dispute carve-out, the customer pays $142,000 on time and withholds only the contested $8,000. The seller's cash position barely moves, and the fight is right-sized.
Same disagreement, same contract. One clause leaves a six-figure receivable hostage to an $8,000 quibble; the other does not. Late interest on the wrongly withheld $142,000 at 1.5% per month is roughly $2,130 a month, an example figure, but it shows why the carve-out is worth fighting for.
Who wants what
| Customer / buyer | Seller / vendor | |
|---|---|---|
| Net days | Longer (net 45 or net 60) | Shorter (net 15 or net 30) |
| Clock trigger | On receipt of a conforming invoice | On invoice date |
| Late interest | Lower, or grace period before it accrues | Higher (1.5%/month), accrues from due date |
| Disputed amounts | Withhold the disputed line, pay the rest | Pay in full, dispute and seek refund after |
| Suspension right | Notice plus a cure period; never for disputed sums | Suspend quickly for any overdue undisputed amount |
| Set-off | Right to net amounts the seller owes | No set-off; pay gross |
The pattern: buyers want to protect cash and keep leverage when something is wrong, sellers want predictable, fast payment and a credible way to stop work when they are not paid.
Market-standard language
A balanced clause for a US B2B services or SaaS agreement reads close to this:
PAYMENT TERMS.
(a) Invoicing. Provider will invoice Customer [monthly / quarterly] in
arrears. Each invoice will reference the applicable order and itemize the
Services and amounts due. Customer will pay all undisputed amounts within
thirty (30) days after receipt of a conforming invoice.
(b) Disputed Amounts. If Customer disputes an invoiced amount in good
faith, Customer will (i) pay all undisputed amounts by the due date and
(ii) notify Provider in writing within [15] days of the invoice date,
describing the disputed amount and the basis for the dispute. The parties
will work in good faith to resolve the dispute promptly.
(c) Late Payment. Undisputed amounts not paid when due accrue interest at
the lesser of 1.5% per month or the maximum rate permitted by law, from
the due date until paid.
(d) Suspension. If any undisputed amount is more than [30] days overdue,
Provider may, after giving Customer [10] days' written notice and an
opportunity to cure, suspend the Services until payment is made. Provider
will not suspend the Services for amounts disputed in good faith under (b).
The "lesser of 1.5% per month or the maximum rate permitted by law" phrasing is doing real work. It charges a meaningful rate but auto-conforms to state usury limits, so the interest term does not become unenforceable for overshooting the legal cap.
The negotiation: standard, fallback, walk-away
Treat timing, late consequences, and dispute handling as separate trades.
| Issue | Opening position | Fallback both sides accept | Walk-away |
|---|---|---|---|
| Net days | Seller: net 15; Buyer: net 60 | Net 30 from a conforming invoice | Open-ended "pay on receipt" with no defined window |
| Late interest | 1.5%/month from due date | 1.5%/month after a short grace period, capped at legal max | No interest at all on overdue amounts |
| Disputed amounts | Buyer: withhold disputed line, pay rest | Pay undisputed by due date, notice within set window | Buyer may withhold the whole invoice over any item |
| Suspension | Seller: suspend on any overdue amount | Suspend only for undisputed amounts, after notice and cure | No suspension right, or suspension for disputed sums |
| Set-off | Buyer: net amounts seller owes | No set-off except a finally adjudicated amount | Broad self-help set-off with no determination |
The workhorse compromise is "pay undisputed amounts on time, dispute the rest in good faith with prompt written notice." It protects the seller's cash and the buyer's leverage at the same time.
Common carve-outs / variations
Payment clauses vary by deal shape. The frequent variations:
- Milestone or upfront billing. Project work often bills on milestones or takes a deposit. Tie each payment to an acceptance event, not just a calendar date.
- Annual prepayment. SaaS often bills the year upfront, non-refundable. A buyer should pair that with a refund-on-termination-for-cause right.
- Auto-renewal price increases. Caps on annual uplift (for example, CPI or a fixed percent) belong here or in the renewal clause.
- Taxes. State who bears sales, use, and VAT taxes (usually the buyer, excluding the seller's income taxes).
- Expenses. Pre-approval thresholds and a markup ban for pass-through costs.
A good-faith dispute carve-out, the most negotiated variation, looks like this:
Customer may withhold payment of a specific line item that it disputes in
good faith, provided Customer pays all other amounts on the invoice when
due and provides written notice of the dispute within [10] business days.
Withholding a disputed line item is not a default under this Agreement.
Jurisdiction and enforceability notes
Payment terms are generally enforced as written between businesses, but several rules can override the contract:
- State usury limits. Most US states cap the interest you can charge, and the cap differs by state and by whether the parties are businesses. A stated rate above the legal maximum can be unenforceable or, in some states, carry a penalty. The "lesser of X or the maximum permitted by law" formulation is the standard safe harbor.
- Prompt-payment statutes. Many states have prompt-payment rules, especially for construction and public-sector contracts, that set minimum interest and timing the parties generally cannot waive. These can trump a softer contract term.
- Late fees versus interest. A flat "late fee" can be challenged as a penalty if it is not a reasonable estimate of the cost of late payment, which is the same principle that governs liquidated damages. Per-month interest is usually the cleaner mechanism.
- Attorneys' fees on collection. Whether a prevailing party can recover collection costs depends on the contract and the state's rule on fee-shifting. For state-by-state detail see our guide on attorneys' fees provisions by state.
This is general information, not legal advice for a specific deal. Enforceability of an interest rate or suspension right turns on the governing law and the facts; confirm against the controlling state's law before you rely on it.
Review checklist: red flags to catch
- The clock runs from invoice date, not receipt of a conforming invoice, so disputes over invoice accuracy do not pause the clock.
- No good-faith dispute carve-out, so the customer must pay contested amounts in full or be in default.
- A suspension right with no notice, no cure period, and no dispute carve-out.
- A stated interest rate with no "maximum permitted by law" cap, risking an unenforceable usury overshoot.
- A flat late fee that reads as a penalty rather than interest.
- Annual prepayment is non-refundable with no refund on termination for the seller's cause.
- A broad set-off right that lets one side self-help net disputed amounts without any determination.
- No price-increase cap on renewal, so the rate can jump at the next term.
How it interacts with other clauses
A payment clause is rarely the whole story. Read it together with:
- Termination: non-payment is the most common for-cause trigger, and the cure period should match the suspension cure period.
- Set-off: whether a buyer can net amounts the seller owes against the invoice belongs here and in the set-off clause.
- Term and renewal: auto-renewal and the annual price-increase cap drive what the buyer actually pays each year.
- Service level agreement: service credits are often applied against future invoices, so the SLA and payment mechanics have to line up.
- Liquidated damages: a flat late fee is subject to the same penalty analysis, so structure it carefully.
For the broader workflow, see the in-house contract review playbook.
FAQ
What are standard payment terms in a B2B contract? The US market standard is net 30 from receipt of a conforming invoice. Net 45 and net 60 are common with larger buyers, and net 15 favors the seller. The trigger that starts the clock matters as much as the number of days.
Can a seller charge interest on late payments? Yes, if the contract provides for it, subject to state usury limits. The common rate is 1% to 1.5% per month, drafted as "the lesser of [rate] or the maximum permitted by law" so it does not become unenforceable by exceeding the legal cap.
Can a customer withhold payment over a dispute? Only if the contract allows it. A well-drafted clause lets the customer withhold the specific disputed line item in good faith, with prompt written notice, while paying everything else on time. Without that carve-out, withholding any amount can be a default.
Can a vendor suspend service for non-payment? Usually yes, if the contract grants a suspension right. The standard form lets the vendor suspend only for undisputed amounts that are overdue, after written notice and a cure period, and not for amounts disputed in good faith.
What is the difference between a late fee and late interest? Late interest accrues over time as a percentage of the overdue amount. A flat late fee is a one-time charge that can be challenged as an unenforceable penalty if it is not a reasonable estimate of the cost of late payment. Per-month interest is usually the safer mechanism.
Should payment be tied to invoice date or invoice receipt? Buyers prefer the clock to start on receipt of a conforming invoice, so a wrong or misdirected invoice does not start the countdown. Sellers prefer the invoice date. Tying it to a conforming invoice on receipt is the common middle ground.
Are non-refundable annual prepayments enforceable? Generally yes between businesses, but a buyer should pair a non-refundable prepayment with a refund right if the buyer terminates for the seller's uncured breach, so the buyer is not paying for a year of service it cannot use.
Related clauses
Clauses that get negotiated alongside this one.
