How to read your Paydex score: the interpretation framework for 2026

Every business credit article tells you what the Paydex scoreis: a 1-100 score from Dun & Bradstreet based on your payment history. Almost none of them tell you how to reada Paydex movement — whether a jump from 68 to 74 matters, why your score dropped after paying every vendor on time, or what specific events in your D&B file cause each score band.

This is Sterling's interpretation framework for Paydex — the same one the prediction model in the app uses to convert your tradeline history into a probable score range and to explain what changes will move the number in either direction.

What Paydex actually measures

The Paydex score is a weighted average of days-beyond-termsacross every tradeline in your D&B file. If your terms are Net-30 and you pay on day 30, that account contributes a perfect score. Day 45 counts as 15 days beyond. Day 20 counts as 10 days before. D&B weights each account by dollar amount, so a $50 Uline order and a $50,000 equipment lease do not carry the same weight — the lease dominates.

This is why two businesses with identical "on-time payment" histories can have very different Paydex scores. What matters is the dollar-weightedaverage of your days-beyond-terms, not the count of accounts paid on time.

The five score bands and what they mean

80 is the practical floor for lender-grade credit. Some alternative lenders accept 70+, but SBA loans, business credit cards from top issuers, and traditional bank lines of credit typically require 80+ Paydex as a gating criterion — sometimes above other bureau scores.

Why your score dropped after paying on time

The most common frustration: you pay every vendor on time, and your Paydex still drops 5-10 points. Three real causes, in order of frequency:

• A large new tradeline reported that skewed the weighted average.If you had five $500 Net-30 accounts averaging Paydex 78, and a new $10,000 equipment lease reported that you paid on day 32 (2 days late), that single account can drag your score down 4-6 points because it dominates the dollar weighting.
• A previously-reporting account dropped off.Some vendors stop reporting to D&B if you close the account or reduce activity below their threshold. If the dropped account was your only 100-Paydex account, the average shifts down mathematically.
• D&B recalculated based on an updated payment.When a vendor submits a revised payment record (correcting an earlier misreport), D&B recalculates historical days-beyond-terms. This can move a score in either direction retroactively.

What kinds of events cause score jumps

Score movements greater than 5 points in a single update are almost always caused by one of four events. Sterling's roadmap deliberately sequences actions against these levers:

Note the asymmetry: getting to Paydex 80 the first time is the biggest single jump— from zero score (no file) to a mid-70s score once three tradelines report. After that, movements are incremental. This is why Sterling prioritizes the "first three tradelines" sequence in the Foundation phase of the roadmap.

What does not affect Paydex

• Personal credit history — Paydex is 100% business tradelines. Your consumer FICO does not appear in the calculation.
• Revenue, profit, or bank balance — these appear in other D&B scores (Financial Stress Score, Delinquency Predictor) but not in Paydex itself.
• The number of employees, years in business, or SIC code — these are file attributes, not payment behavior.
• Credit inquiries — D&B does not use inquiries in the Paydex calculation the way consumer bureaus use them for FICO. Applying for vendor accounts does not drop your score.

Paydex vs other D&B scores

Lenders and vendors pull different D&B scores depending on what they are underwriting. Confusing these leads to bad optimization decisions:

Paydex is the score most within your direct control — it moves with tradeline payment behavior. The Financial Stress Score and Delinquency Predictor draw on financials most small businesses do not report to D&B at all, so those scores are often based on incomplete data and are less predictive than the underlying math suggests.

Sterling's approach to Paydex optimization

The Sterling roadmap does not chase Paydex directly — it sequences the tradeline events that cause Paydex to move. The Foundation phase (months 0–3) is designed to get your first three Net-30 tradelines reporting so the Paydex crosses the 70 threshold. The Build phase (months 3–9) adds larger tradelines and diverse vendor categories so the score stabilizes at 80+. The Scale phase (months 9–18) focuses on high-dollar tradelines and SBFE-reportable accounts that expand your underwriting envelope beyond what Paydex alone can achieve.

For the specifics of which vendors, see The 15 best Net-30 vendors that build business credit. For the full sequence, see How to build business credit fast: the 90-day plan.