Last verified 19 September 2026 · Next review 19 December 2026
Three trade experiences, reported by at least two separate suppliers. That's D&B's published minimum, and the distinction between "experiences" and "suppliers" is where most business owners lose six months.
If you're trying to build business credit from a standing start, getting that count right is the first thing that matters. This page covers what the Paydex score measures, why two vendors beat three accounts, how the score is calculated (it isn't an average), and how long it takes before a number appears. Every figure below is sourced to Dun & Bradstreet's own documentation.
What is a Paydex score, and what is the score range?
The Paydex score is Dun & Bradstreet's measure of one thing: whether a business pays its bills on time. The score range runs from 1 to 100, built entirely from trade experiences that suppliers report to D&B.
That narrow focus is what separates it from other business credit scores. Experian Business and Equifax fold in company size, industry, public filings, and credit utilization. A FICO score blends in personal credit. The Paydex score looks at your payment history with vendors and nothing else.
The practical upshot: you cannot improve your Paydex by incorporating properly or opening a dedicated account. You improve it by having suppliers report that you paid them early.
How many tradelines do you need to get a Paydex score?
Here is D&B's rule, stated in their supplier documentation:
"A Paydex will not be calculated for Businesses with less than three experiences. There must also be two suppliers reporting trade on that Business for a Paydex to be calculated."
Two conditions, both mandatory:
| Requirement | Minimum |
|---|---|
| Trade experiences reported | 3 |
| Separate suppliers reporting | 2 |
| Reported within | 24 months |
| Last sale date within | 36 months |
A trade experience is a single reported payment record. A supplier is the company reporting it. One vendor that invoices you monthly generates many experiences, but it's still one supplier, so it can never satisfy the rule alone.
Most articles on this topic say "three tradelines." That is the wrong unit, and it can cost you a year.
Why do vendor tradelines from two suppliers beat three accounts with one?
Work through three scenarios:
- One vendor, five paid invoices. Five experiences, one supplier. No score.
- Two vendors, three paid invoices between them. Three experiences, two suppliers. Score.
- Three vendors, one invoice each. Three experiences, three suppliers. Score.
The failure case is common because it feels productive. Someone opens a net-30 account, orders from it every month, pays early every time, and waits. Twelve months of perfect payment history, and the Paydex score still reads UN — unavailable. To generate a Paydex score at all, you need tradelines reported to D&B by more than one company.
Open accounts with at least two vendors that report to D&B before you worry about volume. Three reporting tradelines across three separate suppliers is the sensible target, because it clears the threshold with margin if one of them stops reporting.
What is a business tradeline, and how does it reach your credit file?
A tradeline is a credit account that appears on your business credit report. Each one records who extended the credit, the credit limit, and whether the business pays on time, late, or early. Taken together, your business tradelines are the credit history a lender actually reads. We cover the mechanics in more depth in what is a business tradeline.
Vendor accounts, the net-30 terms suppliers extend, are the usual starting point, because most don't require a personal guarantee or a personal credit check. A business credit card is a tradeline. So is a business loan or a line of credit.
One thing to check before you open anything: reporting is not automatic. Most suppliers don't report to anyone, and only tradelines reporting to a bureau do anything for your score. An account helps only if the vendor actually furnishes data, and vendors are often vague about which bureaus receive it. Our list of net 30 vendors that report documents which ones confirm it in their own terms. Ask directly, in writing, before you pay a membership fee.
How is a business credit score calculated at D&B?
Not as an average. D&B weights each payment by its dollar value, summing high credits per payment classification, working out each class's share of total dollars, and weighting accordingly.
That changes which invoice you prioritize when money is tight. A $5,000 invoice paid 30 days late damages your score far more than a $50 invoice paid 30 days late, because the large one carries most of the dollar weight. Three small accounts paid perfectly will not offset one large account paid badly.
If cash is tight and something has to slip, let the small invoice slip.
What is a good Paydex score, and what does a low score cost you?
A score of 80 means paying exactly on terms. Not early. On time. D&B's own score key:
| Paydex | D&B's label | Days beyond terms |
|---|---|---|
| 100 | Anticipates | — |
| 90 | Discounts | — |
| 80 | Prompt | 0 |
| 70 | — | 15 |
| 60 | — | 22 |
| 50 | — | 30 |
| 40 | — | 60 |
| 30 | — | 90 |
| 20 | — | 120 |
| 1–19 | — | Over 120 |
| UN | Unavailable | No score generated |
Calling 80 "excellent" overstates it. A score of 80 or higher is the floor for being read as reliable when business lenders review your file, which matters when you apply for business financing. A higher score requires paying ahead of terms, so if you want a strong Paydex rather than a passable one, pay the invoice the week it arrives rather than the week it's due.
A score above 80 signals you pay early; a low score works in the other direction. Anything under 50 tells a lender you routinely pay a month or more late, and that follows you into every credit decision until enough newer, better experiences outweigh it. A strong score is slower to build than a weak one is to earn.
Do business credit cards report to the Small Business Financial Exchange or to D&B?
Usually the former, which is why using a business credit card does less for your Paydex than people expect.
Paydex is calculated from trade experiences furnished by suppliers. Business credit cards report to Experian Business, Equifax, or the Small Business Financial Exchange, not into D&B's trade data. A business credit card that reports to those bureaus can strengthen your credit profile there while doing nothing for your Paydex.
Cards still matter, just for a different purpose. If your goal is specifically a Paydex score, vendor tradelines are the mechanism you use to build credit, and a card is a supplement rather than a substitute. If your goal is a broad credit profile that lenders can evaluate, you want both.
How long does it take to build a Paydex score?
The delay stacks in three places.
First, the D-U-N-S number itself. It's free from D&B, and the standard route takes up to 30 business days. Expedited service runs about eight business days for a fee. If anyone charges you for a standard D-U-N-S number, you're paying for something D&B gives away.
Second, vendor reporting cadence. D&B says vendors generally report monthly, some quarterly. Equifax asks furnishers to report monthly where possible. Expect 30 to 60 days between your payment and its appearance on your file.
Third, the threshold itself. You need three experiences from two suppliers before anything is calculated. If both vendors report monthly, that's roughly two billing cycles after you have two active tradelines running.
Realistically: 90 to 120 days from opening your first accounts to seeing a number, assuming nothing stalls. Plan on that rather than the "80 Paydex in 30 days" timelines you'll see advertised.
What do Experian Business and Equifax need to generate a score?
Different thresholds, and Experian's is dramatically lower. From their own FAQ, the minimum is "at least one tradeline and/or one demographic element."
One reporting account can generate a score there. This is why many companies see an Experian score months before D&B shows a Paydex, then assume something is broken at D&B. Nothing is broken. The two bureaus need different amounts of data to generate a score, which we break down in Experian Business vs Dun & Bradstreet.
Equifax doesn't publish a minimum tradeline count. The Equifax business credit risk score exists, but the threshold for producing one isn't documented publicly, so treat any specific number you read as unverified.
The takeaway for planning: if you need a score quickly for a specific application, ask the lender which business credit bureau they pull. An Experian-based decision may be reachable far sooner than a Paydex-based one.
Business credit vs personal credit: why build business credit separately?
A Paydex score attaches to your business (its legal name, its address, its D-U-N-S number) and is calculated independently of your personal credit score. Your business credit and personal credit sit in separate systems, and keeping personal and business credit apart is the whole reason to build your business credit deliberately rather than by accident. That separate business credit profile is the asset you are building.
That separation only holds if you maintain it. Open a dedicated business bank account, and use the exact legal business name and business address consistently on every application, because mismatched details are a common reason a tradeline never attaches to the right business profile.
Where you do sign a personal guarantee, and most business loans for a new business will ask for one, you have linked the two. An established business with a few years of history can often avoid this; a new business usually can't. The business credit file still builds, but your personal credit is now exposed to the outcome. Every business reaches this fork eventually, and the ones that planned for it get better terms.
What stops small business owners from seeing a score on their credit report?
Four things, in order of how often they happen.
The first is using a single vendor. The two-supplier rule is the most common blocker, and it stays invisible until you pull your report and find UN sitting where a number should be. Most owners who hit this were doing everything else right.
The second is vendors that don't report. Many net-30 accounts sold as a way to build business credit are vague about who receives their data, and some name bureaus in their terms of service while saying nothing on the sales page. Some state outright that they do not report to D&B, which means they cannot build a Paydex whatever the marketing implies.
Third, inconsistent business information. An account reported against a slightly different legal name or address may never attach to your file at all.
Fourth, checking too early. At 45 days, an absent score is normal. Give it 90 to 120 days before concluding something is wrong, then pull your report and see what actually landed.
A faster way to build business credit
BizMotus reports to business credit bureaus every month as a commercial tradeline on your EIN, on fixed terms at 0% APR, with no personal credit check. Plans start at $14/month — see pricing and what gets reported.
We are one supplier. D&B wants at least two, so to establish business credit properly, open vendor accounts alongside us rather than instead of them. That's the honest version, and it's the same advice we'd give if we weren't in the business.
What to remember
- Three trade experiences from at least two separate suppliers. Both conditions, or no score is generated.
- One vendor can never produce a Paydex score, no matter how many invoices you pay early.
- A Paydex of 80 means "Prompt" — paying on terms. Anything higher requires paying ahead of the due date.
- Paydex is dollar-weighted. A large invoice paid late costs far more than a small one.
- Trade references must be reported within 24 months to count toward the calculation.
- Business credit cards generally don't feed Paydex. They build your file at Experian and Equifax instead.
- Experian needs just one tradeline, so you'll often have a score there long before a Paydex.
- A D-U-N-S number is free. Up to 30 business days standard, about eight expedited for a fee.
- Budget 90 to 120 days from opening accounts to seeing a score.
- Confirm reporting in writing before paying any membership fee. Ask which bureaus, and how often.
- The fastest way to build business credit is two reporting suppliers and early payment, not more accounts with one vendor.