How long does it take to build business credit?

Expect months. A few accounts that report to the business credit bureaus plus several months of on-time payments are enough to begin showing a history, and the file strengthens as it ages.

Does business credit affect my personal credit?

They are separate files, but they overlap in practice. Most small-business lenders check the owner's personal credit, and a personal guarantee makes you responsible for the business debt.

Is a D-U-N-S number free?

Yes. Dun & Bradstreet issues D-U-N-S numbers at no charge, with paid options for faster processing.

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How to build business credit

Business credit is a record of how your company pays its bills. Building it takes months of ordinary good habits, and it pays back every time you borrow.

WithFunded Academy · Lesson 8 of 16 · 3 min read · Updated November 2026

Key takeaways

Keep business and personal money separate, starting with a business bank account.
Credit only builds when the accounts you pay report to the business credit bureaus. Ask before you open one.
Paying on time is the baseline. Paying early is what moves the score.
Your personal credit still matters for most small-business financing, so protect both.

Why it matters

Stronger business credit means lower rates, higher limits, and better terms from suppliers. It also starts to separate the company's finances from your own.

Seven steps

Set up the business as its own entity and get an EIN. An employer identification number is free from the IRS and identifies the business the way a Social Security number identifies you.
Open a business bank account and run all business income and expenses through it. Lenders read these statements first.
Get a D-U-N-S number. It is free from Dun & Bradstreet and creates your file with that bureau.
Open accounts with suppliers that report payments. Net-30 accounts with vendors you already use are the usual starting point. Not every vendor reports, so ask.
Add a business credit card, keep balances well below the limit, and pay it in full.
Pay every bill on time, and early when you can. On Dun & Bradstreet's PAYDEX scale of 1 to 100, a score of 80 reflects paying on time and higher scores reflect paying early.
Check your business credit reports at Dun & Bradstreet, Experian, and Equifax, and dispute anything that is wrong.

Your personal credit still counts

For most small businesses, lenders check the owner's personal credit too, and many ask for a personal guarantee. Keep personal balances low, pay on time, and avoid putting business expenses on personal cards, where they raise your personal utilization without building the business file.

What to expect

A file with a few reporting accounts and several months of on-time payments is enough to start showing a history. Expect the first results in months, not days. No legitimate service can build business credit overnight, and paying for one is rarely worth it.

Keep the business name, address, and phone number identical across your bank, licenses, bureau files, and vendor accounts. Small mismatches can split your history across separate files. WithFunded guidance.

Common questions

How long does it take to build business credit?: Expect months. A few accounts that report to the business credit bureaus plus several months of on-time payments are enough to begin showing a history, and the file strengthens as it ages.
Does business credit affect my personal credit?: They are separate files, but they overlap in practice. Most small-business lenders check the owner's personal credit, and a personal guarantee makes you responsible for the business debt.
Is a D-U-N-S number free?: Yes. Dun & Bradstreet issues D-U-N-S numbers at no charge, with paid options for faster processing.

Next lesson · Sell morePricing for profit: margin vs. markupThe two numbers owners mix up most, and what a discount really costs.

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Rate inputs are as of November 2026: a representative 8%–30% APR band for non-bank term financing and a 7.00% prime rate. Worked examples are WithFunded calculations.

Educational content. WithFunded Academy lessons are general information for small-business owners. They are not financial, legal, or tax advice, and they are not an offer or a commitment to lend. Figures are representative examples and WithFunded calculations, not quotes. WithFunded and Big Think Capital are a financing marketplace; we are not the direct lender and do not guarantee funding, approval, rates, or terms. Actual rates, fees, payments, and terms are set by the funding lender and depend on your business, credit, and the product. Where required by state law, the lender provides cost-of-financing disclosures before any agreement is signed.