Net 30 payment terms give a buyer 30 days from the invoice date to pay the balance in full, with no interest during that window. It’s the most common form of trade credit in business-to-business sales, functioning as a short-term, interest-free loan from the seller. Sellers offer it to encourage larger orders and steady relationships; buyers use it to keep cash working elsewhere until the bill comes due.
How the 30-Day Clock Actually Starts
The “net” is the total owed after returns, allowances, or adjustments. The “30” is the number of calendar days to pay that balance. Most agreements start counting on the invoice date, so an invoice dated June 5 is due by July 5.
That default isn’t universal. Under the Uniform Commercial Code, which governs most commercial sales of goods in the United States, payment is due when the buyer receives the goods, and when a seller ships on credit the credit period runs from the date of shipment; post-dating the invoice pushes the start point back accordingly.1Legal Information Institute. UCC 2-310 – Open Time for Payment or Running of Credit; Authority to Ship Under Reservation Some contracts tie the start date to receipt of goods rather than the invoice date, protecting buyers from paying before they can inspect the shipment. The exact language in your purchase order or service agreement decides which method applies.
End-of-Month and Proximo Variations
Two common variations push the start date later. End-of-month (EOM) terms delay the 30-day window until the last day of the month the invoice was issued. An invoice dated March 15 under EOM net 30 wouldn’t start counting until March 31, making payment due around April 30. Depending on timing within the month, EOM terms can stretch the actual window close to 60 days from the original transaction.
Proximo terms (abbreviated “prox”) set a fixed due date in the following month. “Net 30 prox 10” means payment is due on the 10th of the month after the invoice, regardless of when in the month the invoice was issued. These variations exist because many businesses align their payables with monthly accounting cycles, and a predictable due date simplifies cash management on both sides.
Where Net 30 Sits Among Other Term Lengths
Net 30 is the standard, but it isn’t the only option. Net 15 terms show up frequently in service contracts and smaller supply orders where the transaction cycle is short. Net 60 and net 90 are more common in manufacturing and international trade, where a buyer needs time to turn raw materials into revenue before paying.
The length of credit a seller offers reflects the power dynamic between the parties. A large retailer purchasing from a small supplier can often negotiate net 60 or longer. A new business with no track record might only qualify for net 15, or for prepayment. When a buyer is denied trade credit entirely, sellers fall back on cash-in-advance or cash-on-delivery, which eliminate the seller’s risk but require the buyer to have funds available upfront.
Whatever the length, these terms become binding once both parties accept them through a signed contract, a confirmed purchase order, or a course of dealing where both sides have consistently operated the same way.
Early Payment Discounts and What They’re Really Worth
Many invoices include a notation like “2/10 net 30,” meaning the buyer can take 2% off by paying within 10 days. Miss the 10-day window and the full amount is due by day 30. Common variations include 1/10 net 30 and 3/10 net 60.
These discounts look small until you annualize them. Passing up a 2% discount to hold your cash for an extra 20 days is effectively borrowing at an annualized rate of roughly 36%. The math: you’re paying 2% more for the use of the money for 20 additional days, which works out to about 36 periods per year at 2% each. For most businesses, that’s far more expensive than a bank line of credit. Experienced controllers treat a skipped discount as a deliberate financing decision, not a default.
Late Fees and Which Law Governs
Contracts for net 30 routinely include late fee provisions. The most common structure is a monthly interest charge of 1% to 1.5% on the overdue balance, though some agreements use flat fees. For any of it to hold up, the charge has to be clearly stated in the credit agreement or on the invoice before the transaction happens.
One point of confusion worth clearing up: the Truth in Lending Act does not govern net 30 trade credit. TILA and its implementing regulation (Regulation Z) explicitly exempt credit extended for business, commercial, or agricultural purposes.2eCFR. 12 CFR 1026.3 – Exempt Transactions The disclosure rules that protect consumers getting a mortgage or credit card don’t apply to a supplier extending 30-day terms to another company. The UCC and the contract itself govern instead. Late fee caps vary by state; some impose percentage limits, others leave it to the contract. If your contract is silent on late fees, collecting them becomes significantly harder.
How to Apply for Net 30 Terms
Getting approved starts well before you fill out any vendor application.
Get a D-U-N-S Number First
Many vendors require a D-U-N-S number from Dun & Bradstreet before they’ll process a credit application. The number is free, but standard processing takes up to 30 business days, so request it early.3Dun & Bradstreet. Get a D-U-N-S Number You’ll need the business’s legal name, address, phone number, ownership information, legal structure, year of formation, industry, and employee count. Check first whether one already exists for your business, since Dun & Bradstreet may have created a profile automatically.
The Credit Application
Vendors typically require a formal credit application listing the business’s legal name, tax identification number (EIN), years in operation, and bank references. The most important section is trade references: names and contact information for other suppliers who already extend you credit. Most vendors ask for at least three, along with the credit limits and payment terms each has extended.4U.S. Small Business Administration. How to Use the Rule of Three to Create a Business Credit Profile
The vendor’s credit department will pull your business credit report, verify your references, and check your PAYDEX score if you have one. A PAYDEX score of 80 or above signals low risk and on-time payment habits, making approval far more likely.5Dun & Bradstreet. What Is a PAYDEX Score Scores below 50 suggest high risk, and many vendors will either deny credit or offer much lower limits at that level.
Personal Guarantees
Expect a personal guarantee, especially for newer businesses or first-time accounts. A personal guarantee makes you individually liable if the business entity can’t pay, which pierces the protection an LLC or corporation would otherwise provide. The guarantee typically stays in effect until the vendor receives written notice of termination, and it usually covers not just the invoice balance but also collection costs and attorney’s fees if the debt goes to court.
Read the guarantee language carefully. A “guarantee of payment” lets the vendor come after you personally without first exhausting remedies against the business. A “guarantee of collection” requires the vendor to pursue the business first. Most vendors insist on the former. If you sign one, you’re putting personal assets on the line.
Building From Scratch
New businesses face a chicken-and-egg problem: vendors want trade references, but you can’t get references without accounts. The workaround is to start with vendors known for approving new businesses at low credit limits, then pay those invoices on time or early for several months. Office supply companies and business service providers are common starting points. After you’ve established three to five trade references with a consistent on-time record, larger vendors become much more willing to extend credit.
How Net 30 Accounts Build Business Credit
Not every vendor reports your payment activity to the business credit bureaus, and that distinction matters. The major ones are Dun & Bradstreet, Experian Business, and Equifax Business. When a vendor reports your on-time payments, those trade lines build your business credit profile and raise your PAYDEX score. When a vendor doesn’t report, the account still provides a trade reference for future applications but does nothing for your credit score.
Before opening a net 30 account primarily for credit-building purposes, confirm which bureaus the vendor reports to. PAYDEX scores range from 1 to 100, with 80 and above indicating payment on or before terms.5Dun & Bradstreet. What Is a PAYDEX Score Paying early can push your score above 80, since PAYDEX rewards faster-than-agreed payment. Paying late, even by a few days, drags the score down and shows up on reports future vendors and lenders will review.
Tax Treatment for Sellers Offering Net 30
How you report income from trade credit depends on your accounting method. Under the accrual method, a seller records revenue when the invoice is issued, not when payment arrives. Under the cash method, revenue isn’t recognized until the money actually hits your account.6Internal Revenue Service. Publication 538 – Accounting Periods and Methods For an accrual-basis seller, a net 30 invoice creates taxable income the moment it’s sent, even though cash won’t arrive for a month or more.
When a customer never pays, the seller may be able to deduct that amount as a business bad debt. The IRS requires that the amount was already included in gross income in a current or prior year before you can claim the deduction.7Internal Revenue Service. Topic No. 453 – Bad Debt Deduction That means cash-basis businesses generally can’t deduct unpaid invoices, since they never reported the income in the first place. Accrual-basis businesses can, but they need to show the debt is genuinely worthless by documenting collection attempts and demonstrating that further efforts would be futile. You don’t have to sue and win a judgment, but you do need a paper trail.
If the Buyer Doesn’t Pay
When a net 30 invoice goes unpaid, the seller’s options are shaped by the UCC rather than consumer protection statutes. The Fair Debt Collection Practices Act, which regulates third-party collectors pursuing consumer debts, does not apply to business-to-business debts at all.8Federal Reserve. Fair Debt Collection Practices Act Collectors pursuing commercial debts face fewer federal restrictions, though some states impose their own rules on commercial collection practices.
If a seller has reasonable grounds to doubt a buyer’s ability to pay before the invoice is even due, the UCC allows a written demand for adequate assurance of performance. If the buyer fails to respond within 30 days, that failure is treated as a repudiation of the contract, letting the seller stop shipments and pursue remedies without waiting for the payment deadline to pass.
The statute of limitations for suing on an unpaid commercial invoice is four years from the date payment was due, under the UCC’s default rule. Parties can agree to shorten that period to as little as one year but cannot extend it beyond four.9Legal Information Institute. UCC 2-725 – Statute of Limitations in Contracts for Sale Waiting too long doesn’t just hurt your odds of recovery; it can legally bar you from suing at all.