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Net-30 Trade Lines: How Vendor Credit Builds a Business File

By the GoHarvest editorial team · Updated · 2 min read · Building business credit

Short answer

A trade line is a supplier account that lets you buy now and pay later, often within 30 days (net 30). If the supplier reports your payments to business bureaus, paying on time builds your business credit file. Many suppliers don't report, so ask before counting on one.

Key points

  • Net 30 means the full invoice is due 30 days after the invoice date. Terms like 2/10 net 30 add an early-payment discount.
  • Only accounts reported to a bureau show up in that bureau's file. Ask each supplier which bureaus it reports to.
  • Buy things the business actually needs. A trade line that exists only to build credit costs money and proves little.
  • Pay on or before the due date; late trade payments hurt the same file you're trying to build.

Trade credit is the oldest kind of business credit: a supplier ships the goods and trusts you to pay later. It's also the most common way a young company's business credit file gets its first entries.

How the terms work

  • Net 30: the invoice is due in full 30 days after the invoice date. Net 15, net 45 and net 60 work the same way.
  • 2/10 net 30: pay within 10 days and take 2% off; otherwise pay in full by day 30.
  • Due on receipt / COD: no credit is extended, so nothing to report.

Suppliers usually start new businesses on small limits or prepayment and raise limits as you pay.

When it shows up on your business credit

Only when the supplier reports. Reporting is voluntary and each supplier picks its bureaus: some report to Dun & Bradstreet, some to Experian or Equifax's commercial side, some to several, and many to none. D&B's PAYDEX relies solely on reported trade data, and Experian counts trade experiences among the inputs to its score, so an account that isn't reported simply doesn't exist for that bureau.

Before you open an account to build credit, ask the supplier three things: which bureaus they report to, how often, and whether they report all accounts or only some (some report only after several months, or only above a spending level).

A sensible way to build trade lines

  1. Start with what you already buy. Office supplies, packaging, shipping materials, fuel, equipment parts, wholesale inventory. Buying needed goods on terms costs you nothing extra if you pay on time.
  2. Make the application match your records. Use the exact legal name, address, phone and EIN that appear with the IRS, your bank and the state.
  3. Pay on or before the due date. Paying on terms earns about 80 on PAYDEX; paying early can score higher, but only do it if cash allows or a discount makes it worthwhile.
  4. Let limits grow naturally. Ask for a higher limit after several months of on-time payments.
  5. Check the bureaus after a few months to see which accounts actually appeared.

Watch out for

  • Paying to play. Some "net-30 vendors" charge annual memberships or price goods well above market. The reporting is what you're really buying; decide whether it's worth it.
  • Unused accounts. An account you open and never use may never report.
  • Disputes reported as late. If you hold an invoice because of a problem, tell the supplier in writing so it isn't reported as slow payment.
  • The cost of skipping discounts. Paying at day 30 instead of taking a 2/10 discount is cheap credit only if you can't get money for less elsewhere.

Where trade credit fits

Trade lines prove you pay suppliers. They help with other suppliers, landlords and partners who check business credit. For bank loans they're supporting evidence, not the main event. Lenders will still want financial statements, cash flow and, for young companies, the owner's credit and guarantee. Our guide to lender trust covers what else builds a lending relationship.

Sources

  1. Dun & Bradstreet: Understanding business credit scores and ratings
  2. Experian: How business credit scores are calculated
  3. CFPB Regulation B ยง1002.9: notice rules for business and trade credit

Checked November 9, 2026. Program rules and scoring models change; the source is the authority.

Questions people ask

What does 2/10 net 30 mean?

You can take a 2% discount if you pay within 10 days; otherwise the full amount is due in 30 days. Skipping that discount to keep cash for 20 more days is expensive: it works out to roughly a 37% annualized cost, using the common approximation 2/98 x 365/20.

How many trade lines do I need?

Dun & Bradstreet issues a PAYDEX once three approved accounts are reporting. Beyond the score, lenders and suppliers care more about a few real, sizable accounts paid well over time than a long list of tiny ones.

Are 'starter vendor' programs worth it?

Some are legitimate suppliers that report payments; others sell memberships or overpriced goods mainly for the reporting. Compare the price of what you're buying, check which bureaus they report to, and avoid any that require large upfront fees.

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