The foundation: entity, EIN, D-U-N-S
Business credit files key off three identifiers. The legal entity (LLC or corporation), the EIN from the IRS, and a D-U-N-S number from Dun & Bradstreet, which is free to obtain directly from D&B despite a cottage industry charging for it.
Consistency matters more than people expect. The business name, address, and phone number should match exactly across the state registration, the IRS, D&B, the bank account, and every vendor application. Mismatched records fragment your file and stall the whole project.
- ▸Form the entity and get the EIN directly from the IRS, free
- ▸Get the D-U-N-S number directly from D&B, also free
- ▸Open a business bank account in the exact legal name
- ▸Use one address and phone number everywhere
Net-30 vendors that actually report
PAYDEX, the D&B payment score, requires reported trade experiences. You build them by opening Net-30 accounts with vendors that report to D&B, buying things the business genuinely needs, and paying the invoices early.
The vendors that matter are the ones with real products and a reporting history. Quill for office supplies, Uline for shipping and packaging, Grainger for industrial supplies, and Crown Office Supplies are the staples of every legitimate build. Four or more reporting tradelines is the working threshold for a meaningful PAYDEX score.
Expect lag. Tradelines typically take 6 to 8 weeks to post after your first paid invoice, and a usable file takes a few cycles. Anyone promising a scored file in two weeks is selling something other than what they claim.
PAYDEX mechanics: 80 is on time, above 80 is early
PAYDEX runs 1 to 100 and measures one thing: how you pay relative to terms. Paying exactly on time earns an 80. Scores above 80 require paying early; paying invoices well before the due date is how files reach the high 80s and 90s.
This makes the optimization trivial. Buy modestly, pay the invoice the week it arrives, repeat. There is no utilization game and no balance engineering. Early payment is the entire lever.
The tier ladder: vendors, then fleet and store cards, then banks
The vendor tier exists to unlock the next one. With several months of reported on-time or early payment, the file supports fleet cards and store cards: Sunoco and WEX on the fuel side, Home Depot and similar retail accounts on the supplies side. These report bigger limits and more weight.
The destination tier is bank credit: business credit cards and lines of credit underwritten with real weight on the business file rather than purely on your personal score. Even there, expect a personal guarantee at most banks for a young company. What the file buys you is approvals, better limits, and vendor terms, not immunity from signing.
Set expectations honestly. This ladder takes 6 to 12 months and produces a genuinely useful asset. It does not produce six figures of no-PG money in 30 days, and nothing legal does.
The scam map
Because the real process is slow, the niche is dense with shortcuts that range from useless to criminal. Paid vendor lists sell you the same names in this guide. Junk Net-30 companies charge membership fees for the privilege of reporting a tradeline on a product nobody needs; some report to no bureau at all.
Further down the slope are shelf corporations, aged entities sold with the promise of instant credit, and guru programs promising $100k of EIN-only, no-personal-guarantee funding. The FTC's action against The Credit Game is the reference case for how those promises end. Buying an aged shell to misrepresent business history to a lender is not a gray area.
The $497 to $2,495 course economy sells this exact ladder with branded packaging and a compressed timeline that the bureaus' own reporting lag makes impossible. The unbranded version above is the whole substance.
- ▸Paid vendor lists: the names are free, including in this guide
- ▸Membership-fee Net-30s that exist only to report: skip
- ▸Shelf corporations sold for instant credit: do not touch
- ▸$100k EIN-only no-PG promises: the FTC has already litigated this pitch