The fastest levers are: (1) open vendor trade lines that report to Dun & Bradstreet and Experian Business, (2) pay existing trade obligations early — not just on time — to push PAYDEX above 80, and (3) ensure your EIN-linked business credit file is completely separated from personal credit. Real score movement takes 60–90 days minimum; meaningful improvement takes 6–12 months.
Business credit scores — primarily the Dun & Bradstreet PAYDEX (0–100) and Experian Intelliscore Plus (1–100) — are built from payment experiences reported by vendors, suppliers, and lenders. Unlike personal FICO, which responds to individual account actions within 30–60 days, business credit requires a sufficient number of reporting trade lines before a score can even be calculated. D&B typically requires at least three trade line experiences to generate a PAYDEX score. This is the core bottleneck: most early-stage businesses simply don't have three or more trade credit accounts that report to D&B. The Federal Reserve's Small Business Credit Survey consistently finds that small businesses with strong D&B PAYDEX scores report significantly better access to bank and SBA financing than businesses with thin or absent business credit files — confirming that building the file is worth the effort.
Before opening any trade lines, ensure your business has clean EIN separation from your personal SSN. This means: (1) your business is registered as a legal entity (LLC or corporation) with your state; (2) you have a federal EIN from the IRS EIN online application; (3) you have a dedicated business bank account in the company's name; (4) you have a DUNS number from Dun & Bradstreet (now obtained via the D&B portal as part of Dun & Bradstreet's data products). Sole proprietors without an EIN use their SSN as their business identifier — which means business credit and personal credit are blended by default. Forming an LLC and obtaining an EIN is the foundational step that allows a completely separate business credit file to be built.
The fastest way to build a PAYDEX score is to open Net-30 accounts with suppliers and vendors that report payment experiences to Dun & Bradstreet. Common reporting vendors include: office supply companies (Quill, Grainger, Uline); commercial printing services; shipping and logistics vendors (FedEx Business Account, UPS Business); packaging suppliers; and industry-specific trade suppliers. The key discipline: purchase on credit (Net-30 account), then pay early — not just on time. PAYDEX of 80 = pays on time (as agreed); PAYDEX above 80 = pays before the due date. Paying 10–15 days early vs. on the due date can push PAYDEX from 80 toward 90+. According to the FTC's guidance on business credit, businesses do not have the same statutory free-monitoring rights for commercial credit as consumers have under FCRA — meaning businesses must actively monitor their D&B, Experian Business, and Equifax Business reports through paid subscriptions to catch reporting errors.
Experian Intelliscore Plus (1–100) is a percentile-rank model based on Experian's commercial credit database. Actions that most directly improve Intelliscore: (1) open credit accounts with suppliers that report to Experian Business (many major trade creditors report to both D&B and Experian); (2) keep business credit utilization low — high utilization on revolving business credit accounts (credit cards, lines of credit) negatively affects Intelliscore; (3) avoid derogatory events — business judgments, collections, and tax liens are the hardest negative items to overcome. Intelliscore is a percentile-rank model, so a score of 76 means the business pays better than 76% of comparable Experian-tracked businesses. The fastest path to a high Intelliscore is early payment + low utilization + zero derogatory events — the same behavioral signals that drive PAYDEX above 80.
A 14-month-old LLC with zero business credit opens three Net-30 accounts in Month 1: Quill (office supplies, reports to D&B), Uline (packaging, reports to D&B and Experian), and a Grainger industrial supply account (reports to D&B). In Month 2, the owner places small orders ($200–$500 each) on each account and pays within 10 days of invoice. By Month 3, D&B reports 3 payment experiences and generates a first PAYDEX score — likely 85–90 (early payment). By Month 6 with consistent early payment across 4–5 reporting accounts, PAYDEX is 90+ and Experian Intelliscore is in the 70–80 range. This file now supports approval for business credit cards, net-60 supplier accounts, and some non-bank revolving lines without personal FICO being the sole underwriting variable.