Net 30 is an invoice payment term that gives the buyer 30 calendar days to pay the full amount owed. It works as a short-term, interest-free loan from the seller: goods or services change hands immediately, but the money isn’t due until the 30-day window closes. Once you accept an invoice with these terms, paying by the deadline is a contractual obligation, and missing it can trigger late fees, interest, and damage to your business credit.
The word “net” refers to the total balance after any taxes or shipping charges have been added. It’s the final number, with no further deductions. The “30” is a count of calendar days, not business days, so weekends and holidays eat into the window.
Under the Uniform Commercial Code, the default rule for a sale of goods is that payment is due when the buyer receives the goods. Net 30 is a contractual change to that default, buying the purchaser extra time.1Legal Information Institute (LII) / Cornell Law School. UCC 2-310 – Open Time for Payment or Running of Credit
When the 30-Day Clock Actually Starts
The deadline depends entirely on what event triggers the countdown. Three triggers are standard in trade credit:
- Invoice date. The most common trigger. Day one is the day the seller generates the invoice, regardless of when the goods arrive.
- Receipt of goods (R.O.G.). The clock doesn’t start until the shipment reaches the buyer, which protects the buyer from losing payment time to shipping delays.
- End of month (E.O.M.). Every invoice issued in a calendar month becomes due 30 days after the last day of that month. An invoice dated March 5 and one dated March 22 both come due on April 30.
Ambiguous trigger language is one of the most common sources of payment disputes. If the agreement is silent, the invoice date is the standard assumption. Both sides should confirm the trigger in writing before the first transaction.
Common Variations You’ll See
Thirty days is the most common window, but the same framework covers shorter and longer terms. Net 10 and Net 15 show up in service industries and smaller transactions where sellers want faster turnover. Net 60 and Net 90 are common in manufacturing, heavy equipment, and other industries with long production cycles, where the buyer needs time to generate revenue from the purchase before paying for it. The legal framework doesn’t change with the number; only the deadline does.
Early Payment Discounts and What They’re Really Worth
Sellers often encourage faster payment with a small discount. The most common notation is 2/10 Net 30, meaning the buyer takes 2% off the invoice total if payment arrives within 10 days of the trigger date. If the buyer skips the discount window, the full amount is due by day 30.2J.P. Morgan. How Net Payment Terms Affect Working Capital
On a $5,000 invoice, paying inside the 10-day window saves $100 and brings the total to $4,900. The percentage looks small, but the annualized math is not. Passing on the discount is effectively borrowing $4,900 for the extra 20 days at an effective annual rate of roughly 44.6%. If you have a line of credit or business loan priced well below that, taking the discount and borrowing from the bank is almost always the better move.
Other discount structures follow the same pattern. A 1/10 Net 30 offers 1% off for payment within 10 days. A 3/15 Net 60 offers 3% off if paid within 15 days of a 60-day term. In every case, the first number is the discount percentage, the second is the discount deadline in days, and the last is the full payment deadline.
Your Right to Reject Goods That Don’t Match the Order
Accepting an invoice triggers the obligation to pay, but you don’t have to accept goods that don’t match what you ordered. Under the UCC’s “perfect tender” rule, a buyer who receives non-conforming goods — wrong quantity, damaged items, or products that don’t meet contract specs — can reject the entire shipment, accept it all, or accept part and reject the rest.3Legal Information Institute (LII) / Cornell Law School. UCC 2-601 – Buyers Rights on Improper Delivery
Rejection has to be prompt. You must act within a reasonable time after delivery and notify the seller.4Legal Information Institute (LII) / Cornell Law School. UCC 2-602 – Manner and Effect of Rightful Rejection Continuing to use the goods, staying silent past a reasonable inspection window, or doing anything else inconsistent with the seller’s ownership counts as legal acceptance, and the payment clock keeps running.5Legal Information Institute (LII) / Cornell Law School. UCC 2-606 – What Constitutes Acceptance of Goods After acceptance, you owe the contract price even if you later find a defect, though you may still have a claim for damages.
What Happens If You Pay Late
Missing a Net 30 deadline carries several risks beyond a single late fee. Sellers track overdue invoices with aging reports that sort unpaid balances into buckets: current, 31–60 days past due, 61–90 days, and over 90 days. The further an invoice slides, the more aggressive collection efforts become.
Interest and Late Fees
Most Net 30 agreements include a clause allowing interest on overdue balances. State caps vary widely, from as low as 6% to as high as 50% annually, and several states have no cap at all for commercial transactions above certain dollar thresholds. When a contract doesn’t specify a rate, the state’s default “legal rate” applies, typically between 6% and 12%. A court can refuse to enforce a penalty clause that was unconscionable at the time the contract was made.6Legal Information Institute (LII) / Cornell Law School. UCC 2-302 – Unconscionable Contract or Clause
Lawsuits, Collections, and Credit Holds
If a buyer accepts goods and refuses to pay, the seller can sue for the full contract price plus incidental damages such as storage and resale costs. This applies to accepted goods as well as conforming goods lost or damaged after risk of loss passed to the buyer. Sellers can also turn the invoice over to a commercial collection agency, report the delinquency to business credit bureaus, or place your account on credit hold, which cuts off future shipments until you resolve the balance.
How Net 30 Payments Shape Your Business Credit
Business credit scores are heavily driven by how quickly you pay vendor invoices. The Dun & Bradstreet PAYDEX score, one of the most widely used business credit metrics, is built entirely on payment performance reported by suppliers.
PAYDEX runs from 1 to 100:
- Score of 100: payment 30 or more days before the due date.
- Score of 90: payment about 20 days before the due date.
- Score of 80: payment on the due date. Scores of 80–100 are considered low risk.
- Score of 70: payment about 15 days late.
- Score of 50 or below: payment 30 or more days beyond terms, placing you in the high-risk category.
The score is dollar-weighted and recency-weighted, so larger and more recent transactions matter more. Dun & Bradstreet needs at least two suppliers reporting at least three trade experiences each before it will calculate a PAYDEX. The three major business credit bureaus — Dun & Bradstreet, Experian Business, and Equifax — all receive vendor payment data, though not every vendor reports to every bureau.
The Small Business Financial Exchange acts as a central clearinghouse, aggregating payment performance from its member lenders and sharing it with the bureaus. The exchange covers over 40 million small businesses.7SBFE. SBFE Home If you’re trying to build business credit, opening Net 30 accounts with vendors who actually report payment history is one of the most direct strategies available.
Getting Approved for Net 30 Terms
Most vendors don’t extend Net 30 automatically. New customers fill out a trade credit application that resembles a simplified loan application. A standard form asks for:
- Business details: legal name, trade names, federal employer identification number, state of incorporation, years in operation, and entity type.
- Ownership information: names and contact details for owners, principals, and key officers.
- Banking references: your primary bank, account type, and a contact at the institution.
- Trade references: usually at least three existing vendors who can confirm your payment history, with contact information.
- Financial statements: some vendors request the last two years, especially for larger credit lines.
Applications also commonly ask about prior bankruptcies, unsatisfied judgments, or pending litigation involving the business or its owners. Some vendors, particularly those offering larger credit lines, require a personal guarantee from the business owner. A personal guarantee makes you personally liable for the debt if the business fails to pay, even if you operate as an LLC or corporation. Read that clause carefully before signing, because it overrides the limited liability protection your entity normally provides.
Vendors can also revoke or tighten Net 30 terms based on how you pay. A buyer who consistently pays late may find terms shortened to Net 10 or switched to cash on delivery. A clean payment record protects both your credit score and your access to favorable terms.