A net 30 account is trade credit: a vendor lets your business buy now and pay the full invoice within 30 days. It builds business credit only when the vendor reports your payments to a business credit bureau. Without that reporting, a net 30 account is just a convenient way to buy supplies. This guide explains what net 30 accounts are, how an invoice turns into a score, and how to run the accounts so they actually build something.
Nearly every business credit guide says to open net 30 accounts. Few explain why buying a box of shipping tape on 30-day terms has anything to do with a loan later. When the mechanism is unclear, it is easy to do everything right and still have an empty credit file six months later.
What a net 30 account is
You place an order. The vendor ships it and sends an invoice. The full amount is due within 30 days of the invoice date. Pay inside that window and there is no interest. Pay late and you may owe late fees, and a late payment may land on your business credit file.
This is not a new credit-building product. Businesses have extended terms to each other for as long as there have been businesses. What changed is that some vendors began reporting how customers pay to the business bureaus: Dun & Bradstreet, Experian Business, and Equifax Business. That reporting is the whole reason net 30 accounts matter for credit.
A net 30 account is not a credit card, and the differences matter.
| Personal credit card | Net 30 vendor account | |
|---|---|---|
| Type of credit | Revolving; you can carry a balance | Trade credit; the full invoice is due within 30 days |
| Interest | Yes, if you carry a balance | None if paid on terms; late fees may apply |
| Where you can use it | Almost anywhere | Only with that vendor |
| Approval based on | Your personal credit, tied to your SSN | Your business profile, tied to your EIN; many Tier 1 vendors do not pull personal credit |
| Reports to | Equifax, Experian, TransUnion | D&B, Experian Business, Equifax Business, if the vendor reports |
| Builds | Your personal FICO score | Your PAYDEX and other business scores |
Many Tier 1 vendors will open an account for a brand-new LLC based on the business setup: legal name, EIN, DUNS number, address, and phone. Some ask that your first order or two be prepaid before they switch you to terms. That is normal.
How an invoice becomes a credit score
You buy something on terms. The vendor records the invoice date, the amount, and the date you paid. On its own reporting schedule, usually monthly but varying by vendor, it sends that data to the bureaus it works with. The bureau adds it to your file as a trade line. One trade line says little. Several, reporting month after month, form a pattern, and the pattern is what lenders and the next tier of vendors care about.
A reporting vendor typically sends:
- Your business's legal name and identifying details
- When the account was opened
- Your credit limit or highest credit extended
- Your current balance
- How many days early or late you paid relative to terms
- Your payment history over time
How PAYDEX reads your payments
PAYDEX is Dun & Bradstreet's payment score. It runs from 1 to 100, is based on how promptly you pay vendors that report to D&B, and is dollar-weighted: a larger invoice counts for more than a small one.
| PAYDEX | When you paid | What it tells a lender |
|---|---|---|
| 100 | About 30 days before the due date | Anticipates payment; top of the scale |
| 90 | About 20 days before the due date | Pays early |
| 80 | On the due date | Prompt; the benchmark most lenders look for |
| 70 | About 15 days past due | Slow; starts raising questions |
| 50 | About 30 days past due | Slow; a real problem |
| 40 and below | 60 or more days past due | Serious delinquency |
With personal credit, paying a card two weeks early does nothing extra for your FICO score. With PAYDEX it does. Paying early is the only way above 80.
Dun & Bradstreet will not calculate a PAYDEX score until enough payment experiences are on file. Its supplier FAQ states a score is not calculated with fewer than three payment experiences, and it requires at least two suppliers reporting. That is why the standard advice is three to five accounts, not one or two. Experian Business has Intelliscore Plus, which also runs 1 to 100 but weighs more than payment timing. Equifax Business keeps its own file and its own scores. Which bureaus see your payments depends entirely on which bureaus each vendor reports to, so the mix of accounts matters as much as the number.
Four rules for running net 30 accounts
1. Confirm reporting before you apply. Many vendors offer net 30 terms and never report. You could pay one perfectly for a year and your file would show nothing. Look for a statement about credit reporting on the vendor's site, or call the credit department and ask which business bureaus they report to. If they cannot give a clear answer, move on.
2. Buy things you would buy anyway. An account must be used before it can report. It does not need to be large: printer paper, stretch wrap, safety glasses. Real, recurring activity is what counts. Some vendors close inactive accounts.
3. Pay from the business bank account. Every payment should come from business checking, never personal. This keeps the wall up between you and the entity, and it keeps your records clean when a lender looks at your banking history.
4. Pay early when you can. On net 30 terms, a PAYDEX of 90 means paying about 20 days before the due date, so a simple habit is to pay each invoice within the first 10 days. Paying a week early feels good, but D&B still scores it as on time. Across five accounts over six months, the habit adds up.
Four mistakes that cost months
Applying before your setup is done. Vendor applications ask for your legal business name, EIN, DUNS number, address, and phone. Something missing is a denial. Something that does not match, such as an address that reads one way on your state filing and another way on the application, creates a mismatch that follows your file around. See LLC setup for business credit.
Assuming it is reporting because you paid. After about 60 to 90 days, check whether each account shows up on your files. Some vendors report on a delay, some only start after the balance crosses a threshold, and some report to only one bureau. See how to check your business credit score for free.
Opening a pile of accounts in the same week. The accounts still need time to report, and a burst of applications from a new business can look like scrambling. Open three to five solid Tier 1 accounts, let them report, build 90 days of history, and then decide whether you need more.
Checking for a score too early. A net 30 account cannot report a payment until there is a payment. Add the vendor's reporting schedule and the bureau's minimum number of payment experiences, and it is normal to see no PAYDEX for the first couple of months. Give it 90 days before judging anything.
Ready to pick vendors? See net 30 vendors that report to business credit bureaus.