Payment Terms in Contracts: Net 30, Net 60 & Guide

TL;DR:Payment terms are a financing decision disguised as a contract clause. Every extra day you give a buyer is working capital you're lending them at 0% interest. Draft the invoice requirements tightly, specify the trigger date for the payment clock, include real consequences for late payment, and make sure the dispute mechanism can't be abused to hold up the entire invoice over a line-item disagreement. The companies with the healthiest cash positions aren't the ones with the highest revenue - they're the ones with the best payment terms.

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What is a Payment Terms clause?

Payment terms govern the mechanics of getting paid: who invoices whom, when payment is due, what currency it's in, what happens if payment is late, and what triggers a right to withhold or offset. These provisions sit at the intersection of contract law and cash flow management, and their commercial impact is often larger than the headline deal value suggests.

A company with $10 million in annual revenue and Net 60 payment terms has roughly $1.6 million perpetually locked in receivables. Shift those terms to Net 30 and you've freed up $800,000 in working capital without changing a single line of the P&L. That's why payment terms are never "just admin" - they're a financing decision baked into every contract. CFOs at companies like Apple, Walmart, and Amazon have understood this for decades, using extended payment terms as a free source of working capital at their suppliers' expense.

Typically found in the Compensation, Fees, or Payment section of commercial contracts, the clause:

• Sets the invoice cycle and payment due date (Net 30, Net 60, milestone, etc.).
• Specifies the currency and method of payment.
• Defines late payment consequences (interest, suspension of services, termination).
• Establishes a dispute mechanism for contested invoices.
• Addresses taxes, withholding, and currency conversion.

Payment Timing - Net Terms vs. Milestone:

Net terms (Net 30, Net 60, Net 90) mean the full invoice amount is due X days after the invoice date. They're simple, standardized, and the default in most B2B transactions. The number is a negotiation lever: the paying party wants longer terms (free float); the receiving party wants shorter terms (faster cash conversion). Industry norms vary - professional services typically run Net 30, manufacturing and supply chains run Net 45-60, and large enterprise buyers routinely push for Net 90 or longer.

Milestone-Based Payments:

Milestone payments tie disbursements to the completion of defined deliverables or project stages. They're standard in construction, software development, and consulting engagements where the work happens over months or years. The benefit: the paying party only releases funds when it can verify progress, and the receiving party gets predictable cash inflows aligned to work effort. The risk: if milestones are poorly defined, disputes about whether a milestone has been "achieved" can delay payment for months.

A well-drafted Payment Terms clause contains:

Invoice Requirements: What a valid invoice must contain - itemized description of goods or services, applicable PO number, tax registration numbers, bank details, and any supporting documentation (timesheets, delivery receipts, milestone completion certificates). A receiving party that submits invoices missing required information gives the paying party a legitimate reason to reject and delay payment.
Payment Due Date: The number of days from invoice date (or receipt, or end of month) within which payment must be made. Be specific: "Net 30 from date of invoice" is clear; "payment due within a reasonable time" is not. If the contract uses milestone payments, tie each payment to a specific, verifiable event.
Late Payment Interest: The rate charged on overdue amounts. Market standard is 1%-1.5% per month (12%-18% annualized), or the lesser of a specified rate and the maximum rate permitted by applicable law. Without a late payment clause, the receiving party may only be entitled to statutory interest - which in many jurisdictions is lower than the cost of borrowing.
Currency and FX Risk: If the parties are in different countries, specify the currency of payment and who bears foreign exchange risk. Options include fixed-rate conversion at the invoice date, spot rate on the payment date, or a currency hedging mechanism for large or long-duration contracts.
Right to Withhold / Dispute Mechanism: The paying party's right to withhold payment on disputed amounts - and the process for resolving the dispute. Best practice: the paying party must pay undisputed amounts on time, notify the receiving party of the disputed portion within a set period, and resolve the dispute through a defined escalation process. Don't let a $10,000 dispute hold up a $500,000 invoice.
Set-Off Rights: Whether either party can deduct amounts owed under other contracts or obligations from payments due under this contract. The paying party wants broad set-off rights; the receiving party wants them excluded or limited to liquidated and undisputed amounts only.
Taxes and Withholding: Who is responsible for VAT, GST, sales tax, and withholding tax. The receiving party typically wants the stated price to be "exclusive of applicable taxes" and for the paying party to bear all tax obligations. Cross-border contracts must address withholding tax - if the paying party is required to withhold, does it gross up the payment so the receiving party receives the full contracted amount, or does the receiving party bear the reduction?

Market Position & Benchmarks

Where Does Your Clause Fall?

Buyer/Payer-Protective (Extended Terms): Net 60-90 payment windows, broad dispute rights allowing withholding of entire invoice amounts, expansive set-off rights across all contracts between the parties, no early payment discounts offered, right to reject invoices for minor formatting deficiencies, no interest accrual until formal written notice of overdue status, right to suspend payments during any dispute. Maximizes buyer's float and cash position at the supplier's expense.
Balanced/Market Standard: Net 30 payment terms from date of invoice, late payment interest at 1.5% per month, dispute mechanism requiring payment of undisputed amounts on time, set-off limited to liquidated and undisputed amounts, early payment discount available (2/10 Net 30), currency specified with FX risk allocated to the paying party, right to suspend services after 15 days past due with written notice.
Supplier/Payee-Protective (Accelerated Terms): Net 15 or payment in advance, interest accruing automatically from the due date without notice, right to suspend all services after 7 days past due, no set-off rights for buyer, invoices deemed accepted if not disputed within 5 business days, right to require prepayment or letter of credit if buyer's credit deteriorates, all taxes and bank charges borne by the buyer.

Market Data

The global average Days Sales Outstanding (DSO) across industries is approximately 40 days, though it ranges from 25 days in retail to 65+ days in construction and government contracting (Atradius Payment Practices Barometer, 2024).
Net 30 remains the most common payment term in B2B transactions, used in approximately 52% of commercial contracts. Net 60 accounts for 28%, and Net 90 for approximately 12% (Billtrust/PYMNTS.com, 2024).
Early payment discount adoption (typically 2/10 Net 30) has increased to 38% of supplier contracts, up from 25% in 2020, driven by rising interest rates making the annualized return on early payment (approximately 36%) more attractive than alternative investments.
Late payment interest rates in negotiated commercial contracts average 1.0-1.5% per month (12-18% annualized). Statutory default rates are lower: 8% above Bank of England base rate in the U.K.; prime rate plus 2-3% in most U.S. states.
Approximately 72% of enterprise contracts now include a right to suspend services or deliveries for non-payment, up from 55% in 2019, reflecting suppliers' increased leverage post-pandemic supply chain disruptions.
Milestone-based payment structures appear in 85% of construction contracts, 68% of custom software development agreements, and 45% of consulting engagements exceeding $500,000 in value.

Sample Language by Position

Buyer-Protective: "All invoices shall be payable within sixty (60) days of receipt of a valid, undisputed invoice. Buyer may withhold payment on any invoice or portion thereof that Buyer disputes in good faith. No interest shall accrue on withheld amounts during the pendency of a dispute. Buyer may set off against any amounts payable hereunder any amounts owed by Supplier to Buyer or its Affiliates under this or any other agreement. Supplier shall not suspend, reduce, or otherwise limit performance due to any payment dispute. All prices are inclusive of applicable taxes unless otherwise stated."

Balanced/Market Standard: "Invoices are due and payable within thirty (30) days of the invoice date. Any undisputed amount not paid when due shall accrue interest at one and one-half percent (1.5%) per month, or the maximum rate permitted by law, whichever is less. If Buyer disputes any portion of an invoice, Buyer shall pay all undisputed amounts by the due date and notify Supplier of the disputed amount within fifteen (15) days. If any undisputed amount remains unpaid for more than fifteen (15) days after the due date, Supplier may suspend performance upon ten (10) days' written notice. A 2% discount applies to invoices paid within ten (10) days."

Supplier-Protective: "All fees are due and payable within fifteen (15) days of the invoice date. Late payments shall bear interest at two percent (2%) per month from the due date without need for notice or demand. If any payment remains outstanding for more than seven (7) days past due, Supplier may immediately suspend all services and deliveries until payment is received in full, including accrued interest. Buyer shall have no right to withhold, set off, or deduct any amount from payments due without Supplier's prior written consent. All bank charges, wire transfer fees, currency conversion costs, and applicable taxes shall be borne by Buyer. Supplier may require prepayment or a letter of credit if, in Supplier's reasonable judgment, Buyer's creditworthiness has materially deteriorated."

Example language:

SaaS Subscription Agreement: Annual subscription fees are invoiced 30 days before the start of each subscription period and due on the first day of the period. If payment is not received within 15 days of the due date, the provider may suspend access to the platform after giving 10 days' written notice. Late payments accrue interest at 1.5% per month. The customer has no right to withhold fees based on a service level dispute - SLA credits are applied against future invoices per the SLA schedule.

"All invoices shall be due and payable within thirty (30) days of the date of invoice. Any undisputed amount not paid when due shall bear interest at the rate of one and one-half percent (1.5%) per month, or the maximum rate permitted by applicable law, whichever is less, calculated from the date payment was due until the date payment is received in full."

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Construction Contract: The contractor submits monthly progress claims by the 25th of each month, supported by a quantity surveyor's certificate. The owner reviews and certifies within 14 days. Payment is due 30 days after certification. The owner may withhold up to 5% as retention, released 50% at substantial completion and 50% at final completion. Disputed amounts are escalated to the project director within 7 days; undisputed amounts must be paid on time regardless of any dispute.

"If Customer disputes any portion of an invoice in good faith, Customer shall: (a) pay all undisputed amounts by the due date; (b) deliver written notice of the dispute to Provider within fifteen (15) days of receiving the invoice, specifying the disputed amount and the reason for the dispute; and (c) cooperate with Provider in good faith to resolve the dispute within thirty (30) days. If the dispute is resolved in Provider's favor, Customer shall pay the disputed amount plus interest within ten (10) business days of resolution."

Payment structures by contract type:

Common payment term structures:

Negotiation Playbook

Key Drafting Notes

Specify the Payment Clock Trigger Precisely: "Net 30" is meaningless without a defined starting point. Is it 30 days from invoice date, invoice receipt, end of the month in which the invoice was issued, or acceptance of deliverables? Each interpretation shifts the actual payment date by days or weeks. For suppliers, "from date of invoice" is best because the clock starts the moment you send. For buyers, "from receipt of a valid, undisputed invoice" is preferable because it adds buffer time and allows rejection of defective invoices. Never leave this ambiguous; disputes over when the clock started are among the most common payment litigation issues.
Structure Early Payment Discounts With Full Financial Awareness: A 2/10 Net 30 discount (2% off if paid within 10 days) translates to an annualized return of approximately 36% for the buyer. At current interest rates, any buyer with access to credit below 36% should take every discount offered. For suppliers, offering early payment discounts only makes economic sense if your cost of capital exceeds the implied annualized rate, or if cash flow acceleration is strategically critical. Model the actual cost before including discount terms; many suppliers offer discounts out of convention without understanding the financial impact.
Right to Suspend Must Be Explicit and Have a Cure Period: A supplier's right to suspend services for non-payment is one of the most effective remedies, but it must be drafted carefully. Include: (a) a minimum number of days past due before suspension is triggered (10-15 days is market), (b) a written notice requirement before suspension, (c) confirmation that suspension does not constitute a breach or waive any other remedy, and (d) an obligation for the buyer to pay all outstanding amounts plus interest before services resume. Without these elements, a premature suspension could be treated as a material breach by the supplier.
Currency Provisions in Cross-Border Contracts Are Non-Negotiable: In any contract involving parties in different currency zones, specify: the currency of payment, the exchange rate determination method (invoice date rate, payment date rate, or agreed fixed rate), which party bears FX risk, and whether the paying party must gross up payments to cover conversion losses. For long-duration contracts, consider a currency adjustment mechanism triggered when the exchange rate moves beyond a defined band (e.g., 5% from the rate at signing). Failing to address currency creates disputes that are expensive and time-consuming to resolve.
Invoice Dispute Mechanisms Must Protect Both Sides: The paying party needs the right to dispute invoices without being in breach. The receiving party needs protection against bad-faith disputes used as a delay tactic. Best practice: (a) require the paying party to pay all undisputed amounts by the due date, (b) require written notice of the disputed portion within 10-15 days, (c) set a 30-day resolution period with defined escalation, and (d) provide that if the dispute resolves in the receiving party's favor, the disputed amount plus interest is payable within 10 business days. This structure prevents a $10,000 line-item dispute from holding up a $500,000 invoice.

Common Pitfalls

Silent on Accrued Payment After Termination: The most dangerous gap in payment terms drafting. If the termination clause does not explicitly state that payment obligations for work already performed survive termination, the non-paying party will argue that termination ended all obligations, including accrued but unpaid invoices. Always include: "Termination shall not relieve either Party of payment obligations that accrued prior to the effective date of termination. All invoices for services performed or goods delivered before termination remain due and payable in accordance with this clause."
Allowing Broad Set-Off Without Guardrails: Unlimited set-off rights allow a buyer to deduct amounts "owed" under other agreements from payments due under the current contract. This can be weaponized: the buyer manufactures a claim under an unrelated agreement and withholds payment. Limit set-off to liquidated, undisputed amounts that have been finally determined by a court or agreed in writing. Require written notice before any set-off is exercised. The receiving party should never accept unrestricted set-off rights across affiliates.
No Protection Against Invoice Rejection Abuse: Some contracts allow the paying party to reject invoices that do not meet format requirements, but without a time limit on rejection. A buyer can receive an invoice, wait 25 days, reject it on a technicality, and reset the payment clock when the corrected invoice is submitted. Fix this by requiring rejection within 5-7 business days of receipt. If the buyer does not reject within that window, the invoice is deemed accepted and the payment clock runs from the original invoice date.
Ignoring Withholding Tax Gross-Up: In cross-border contracts, the paying party may be required by local law to withhold tax from payments (commonly 10-30% of the payment amount). If the contract is silent on who bears the cost, the receiving party gets less than the contracted price. Best practice for the receiving party: include a gross-up clause requiring the paying party to increase the payment so the net amount received equals the full contracted price. For the paying party, push back and require the receiving party to provide tax residency certificates and claim treaty benefits to reduce withholding rates.
Auto-Renewal Price Escalation Without Exit Right: SaaS and subscription contracts that auto-renew with annual price increases (3-7% or CPI-linked) can trap buyers into escalating costs. If the contract does not give the buyer a right to terminate upon receiving notice of a price increase, the buyer is locked in. Always include: (a) advance written notice of price changes (60-90 days before renewal), (b) a right to terminate without penalty if the increase exceeds a defined threshold, and (c) a cap on annual increases (e.g., "not to exceed 5% or CPI, whichever is greater"). Buried escalation clauses are a leading source of customer disputes.

Key drafting notes for Payment Terms:

The "Net" Ambiguity: "Net 30" can mean 30 days from invoice date, 30 days from invoice receipt, 30 days from end of the month in which the invoice was issued, or 30 days from acceptance of deliverables. Specify the trigger date explicitly. Disputes over when the clock starts are common and entirely avoidable.
Early Payment Discounts: "2/10 Net 30" means a 2% discount if paid within 10 days, otherwise the full amount is due in 30 days. This sounds like a small concession, but the annualized cost to the paying party of not taking the discount is roughly 36%. If you're offering early payment discounts, do the math - you may be better off borrowing at 6% and taking every discount you're offered.
Retention / Holdback: In construction and project-based contracts, the paying party withholds a percentage (typically 5-10%) of each progress payment as security for defects or incomplete work. Retention is released in stages - half at substantial completion, the remainder after the defects liability period. The performing party should negotiate for retention to be held in a trust account or replaced by a bond to protect against the paying party's insolvency.
Most Favored Customer Clauses: Some buyers negotiate a right to receive the supplier's best available pricing. If the supplier offers better terms to another customer, the buyer's terms automatically adjust. These clauses create significant commercial risk for the supplier and require careful drafting to define comparability, scope, and verification mechanisms.
Automatic Renewal and Price Escalation: SaaS and subscription contracts often auto-renew with annual price increases (typically 3-7% or CPI-linked). Make sure the payment terms address how price changes are communicated, when they take effect, and whether the customer has a right to terminate rather than accept an increase. Buried auto-renewal clauses with aggressive price escalators are a common source of customer disputes.

Historic note:

Payment terms in commercial law evolved from the practices of medieval merchant guilds and the lex mercatoria (law merchant) that governed trade fairs across Europe. Bills of exchange - the earliest form of structured payment terms - emerged in Italian city-states in the 12th century as a way to facilitate trade across borders without physically transporting gold. The practice was formalized in England through the Bills of Exchange Act 1882, which codified rules for negotiable instruments that still apply today. The concept of "Net 30" became standard in American business during the early 20th century as companies moved from cash-on-delivery to credit-based trade. The Late Payment of Commercial Debts (Interest) Act 1998 in the U.K. and the EU Late Payment Directive (2011/7/EU) were legislative responses to the chronic problem of large buyers using extended payment terms to squeeze smaller suppliers' cash flow.

Jurisdiction specific notes:

U.S.: There is no general federal statute governing payment terms in commercial contracts - terms are a matter of private negotiation, subject to state contract law and the UCC for goods transactions. The Prompt Payment Act applies to federal government contracts (payment due within 30 days of a proper invoice, with automatic interest for late payment). Some states have prompt payment statutes for construction contracts, requiring payment within 30-60 days of invoice submission and imposing penalties for late payment. Late payment interest rates are governed by state usury laws, which vary widely - check the applicable state's maximum before setting a rate.
U.K.: The Late Payment of Commercial Debts (Interest) Act 1998 gives suppliers a statutory right to charge interest on late payments at 8% above the Bank of England base rate, plus a fixed compensation amount (ranging from 40 to 100 pounds depending on the debt size). The Act applies unless the contract includes a "substantial remedy" for late payment - meaning a contractual interest rate that is a genuine deterrent. The Reporting on Payment Practices and Performance Regulations 2017 require large U.K. companies to publish their payment practices, including average payment times and the percentage of invoices paid beyond terms. This transparency has put pressure on large buyers to shorten payment cycles.

Drafting tip:

Always specify whether the payment obligation survives termination and what happens to unpaid invoices for work already performed. A termination clause that is silent on accrued payment obligations creates a gap that the non-paying party will exploit. Best practice: include a sentence confirming that termination does not relieve either party of payment obligations that accrued before the termination date.