The D&B Rating Explained: Why Your PAYDEX Score Isn't the Whole Picture

Most owners who have worked on their business credit know the number to watch is PAYDEX. Far fewer know that Dun & Bradstreet also publishes a completely separate code — the D&B Rating — that shows up on the same credit report and gets read by some of the same lenders, suppliers, and vendors. Confusing the two, or not knowing the second one exists, leaves owners unable to explain why a supplier balked at extending terms even though their payment history looked clean.

The D&B Rating is not one score. According to D&B's own published guide, it is two codes stapled together: a size indicator and a risk indicator, reported side by side on every full D&B Business Information Report.

The D&B Rating is two separate codes read together

A “3A2” reads as two different questions answered at once: how big (3A), and how risky (2).

A “- -” on a D&B report means the absence of a rating, not a denial signal by itself — D&B's own key lists deficit net worth, bankruptcy proceedings, insufficient payment information, or an incomplete history indicator as the reasons it can appear.

View the data as a table

Financial Strength Indicator	Composite Credit Appraisal
Letter code: 5A down to HH	Number: 1 through 4
Reflects company SIZE	Reflects creditworthiness RISK
Based on net worth or equity	Built from payments, financials, public records, age
Requires a current financial statement on file	Capped at a "2" without current financials on file
1R/2R used instead when sized by employee count	Lower number = lower risk

Part one: the Financial Strength Indicator

The Financial Strength Indicator is a letter code — D&B's published scale runs from 5A at the top down through 4A, 3A, 2A, 1A, A, B, C, D, E, F, G, H, to HH at the bottom. D&B states plainly that these classifications “reflect company size based on worth or equity as computed by Dun & Bradstreet,” and that they are assigned only to businesses that have supplied D&B with a current financial statement.

D&B's own page does not publish the exact tangible-net-worth dollar bracket tied to each letter (so this article will not invent one — if a source claims an exact dollar range for “3A” without citing D&B directly, treat it skeptically). What D&B does state clearly is the fallback: when a business has not supplied a current financial statement, D&B instead assigns a 1R or 2R code, sized by number of employees rather than net worth. A company showing “ER7,” for example, is reporting an employee range of five to nine.

Part two: the Composite Credit Appraisal

The second code is a single digit, 1 through 4, that D&B calls the Composite Credit Appraisal. D&B's own description is that it “reflects Dun & Bradstreet's overall assessment of that firm's creditworthiness,” built from an analysis of “company payments, financial information, public records, business age and other important factors (when available).”

The Composite Credit Appraisal: 1 is lowest risk, 4 is highest

The second half of the D&B Rating — a single 1–4 risk number, lower is better.

D&B's own rating key states a company that has not supplied current financial information to D&B can receive a “2” at best — a 1 is reserved for businesses D&B has current financials on file for.

One rule in D&B's own key is easy to miss and expensive to miss: a company that has not supplied D&B with current financial information can receive a “2” at best — a “1” is reserved for businesses D&B actually has current financials on file for. In other words, a thin file does not just risk a lower score; it caps the ceiling, no matter how clean the payment history is.

How a D&B Rating actually reads

The two codes are published together, which is why a Rating looks like “3A2” or “1A3” rather than a single clean number. Reading one means answering two different questions at once:

• How big is this company? — answered by the letter code (the Financial Strength Indicator, or the employee-based 1R/2R when no financials are on file).
• How risky is extending it credit? — answered by the number (the Composite Credit Appraisal, 1 being lowest risk).

A “3A2” reads as a mid-to-large company (by net worth) carrying slight risk. A “1A4” reads as a smaller company carrying significant risk. The two halves do not move together automatically — a large, well-capitalized business can still post a weak Composite Credit Appraisal if its payment and public-record history is poor, and a small company with a spotless file can post a strong Composite Credit Appraisal despite a modest Financial Strength Indicator.

Why a missing Rating is not automatically bad

D&B's own key explicitly addresses the “- -” symbol that appears when no Rating is assigned at all: it states this “should not be interpreted as indicating that credit should be denied.” The reasons D&B lists for a missing Rating include deficit net worth, bankruptcy proceedings, lack of sufficient payment information, or an incomplete history indicator — some of which (a thin file on a young business, for instance) are not a red flag on their own. That is the same mechanical gap covered in why a business credit file can stay empty despite years of on-time payments: the absence of a number is not the same statement as a bad number.

D&B Rating vs. PAYDEX: two different questions

It is worth repeating plainly, because the two are easy to conflate: PAYDEX answers how promptly does this business pay, on a 1–100 scale built entirely from Trade Experiences. The D&B Rating answers two different questions — how big is it and how creditworthy is it overall — using a broader input set that includes financial statements and public records alongside payment data. A business can carry a strong PAYDEX and a weak or absent D&B Rating, particularly if it has never supplied D&B with a financial statement. Neither score substitutes for the other, and neither substitutes for Experian or Equifax's own separate business scores, which run on entirely different bureaus.

What this means for financing conversations

None of this replaces a lender's core underwriting — covered in full in the fundability checklist — but a supplier or larger B2B vendor deciding whether to extend trade terms, or a partner running vendor-vetting on an RFP, may pull the full D&B Rating rather than PAYDEX alone. Two practical moves follow directly from how the Rating is built:

1. Supply D&B with a current financial statement if you want access to a Financial Strength Indicator based on net worth rather than the employee-count fallback, and to clear the “2” ceiling on the Composite Credit Appraisal.
2. Build reporting trade lines first if the goal is the Composite Credit Appraisal specifically — it draws on the same payment data that builds PAYDEX, so the groundwork in verifying which net-30 vendors actually report serves both scores at once.

Re-verified 2026-11-01 directly against D&B's own “Key to the D&B Rating” page: the two-part structure, the 5A–HH and 1R/2R letter codes, the 1–4 Composite Credit Appraisal, the “2 without financials” ceiling, and the “- -” no-rating symbol are all quoted or closely paraphrased from that page as published. No dollar thresholds are stated in this article because D&B does not publish them on that page.

The takeaway

PAYDEX is not the only Dun & Bradstreet code a lender or supplier can see. The D&B Rating is a separate, two-part read of your business — size and overall risk — and a business that has never supplied D&B with a financial statement is leaving the Financial Strength Indicator on the employee-count fallback and capping its Composite Credit Appraisal at a “2” regardless of how clean its payment record is. Treat the two D&B codes, and PAYDEX, as three separate signals worth checking, not one.

Important: MidBank is not a bank, a financial institution, or a financial advisor. We are an advocate and ISO affiliate that connects businesses to vetted third-party providers. This article is general information published on November 1, 2026, not legal, tax, or financial advice — rules and rates change, and your situation is specific to you. Confirm details with the primary sources linked above and with a qualified tax or legal professional before acting.