Paying vendors early to boost a PAYDEX score above 80 is worth it mostly when the supplier gives you an early payment discount bigger than your cost of cash, or when the money would otherwise sit idle well above your reserve. Dun & Bradstreet's own PAYDEX fact sheet says a PAYDEX of 80 "denotes that payments reported to Dun & Bradstreet have generally been made within terms," and that a score over 80 means payments "have been made earlier than terms." Paying reported bills on the due date already lines up with an 80, and every point above it is bought with working capital.
Below we price a $20,000 monthly bill paid 20 days early and show when holding the cash is the better call. Sources were checked on November 2, 2026.
What D&B says a PAYDEX above 80 means
D&B describes PAYDEX as "a dollar-weighted indicator intended to reflect a business's past payment performance," scored from 1 to 100, where a higher number represents a greater likelihood that a business will pay its debts on time (D&B PAYDEX page, viewed November 2, 2026). The top of its scale, from the fact sheet dated 2020:
| PAYDEX | D&B's label for the payment practice |
|---|---|
| 100 | Anticipates |
| 90 | Discounts |
| 80 | Prompt |
| 70 | 15 days beyond terms |
| 60 | 22 days beyond terms |
| 50 | 30 days beyond terms |
The fact sheet gives no day count for a 90 or a 100, and we found no current D&B page that converts days early into points, so the class depends on what your supplier reports.
Only reported payments count. D&B's PAYDEX page says "Payment experiences that go unreported cannot be considered," and its funding and lending page says a business needs at least four trade references on file before a PAYDEX Score can be determined. The fact sheet also says a trade experience must have been reported within the last 24 months to be used, so an early-payment habit only holds the score up while it continues.
How much an early payment moves a dollar-weighted score
Because PAYDEX weights suppliers by dollars, the size of the account you prepay decides how far the score moves. D&B's older supplier FAQ, a file dated 2017, shows the method: take each payment class's share of total dollars, multiply it by an index weight (Anticipates 100, Discount 90, Prompt 80, Slow to 30 days 50), and add the results. D&B calls the current score proprietary, so treat the table below as an illustration.
Assume four suppliers that report to D&B, with $30,000 of total credit: the $20,000 monthly supplier plus accounts of $6,000, $3,000 and $1,000.
| Scenario (assumed) | Weighted math | Illustrative PAYDEX |
|---|---|---|
| All four paid on terms | 100% × 80 | 80 |
| $20,000 supplier paid early, reported as discount | 66.7% × 90 + 33.3% × 80 | about 87 |
| Same payment, reported as anticipates | 66.7% × 100 + 33.3% × 80 | about 93 |
| Only the $1,000 supplier paid early, reported as discount | 3.3% × 90 + 96.7% × 80 | about 80 |
| $20,000 supplier early (discount), $6,000 supplier 30 days slow | 66.7% × 90 + 20% × 50 + 13.3% × 80 | about 81 |
In the last row, prepaying the big supplier left a smaller bill 30 days past terms, and most of the gain disappeared.
The cash cost of paying a $20,000 bill 20 days early
Net 30 terms are short-term working capital your supplier extends at no stated interest. Paying on day 10 hands back 20 days of that credit every month, so the cost is whatever the $20,000 would have earned, or whatever you pay to borrow it.
Assumptions:
- Bill: $20,000 a month on net 30 terms from a supplier that reports to D&B, paid on day 10 instead of day 30.
- Idle cash yield: 4.00% a year, matching the 3-month Treasury bill on October 29, 2026 in the Fed's H.15 release dated October 30, 2026. Many business checking accounts pay less.
- Line of credit: 12.00% a year, simple interest on actual days over 365, no draw fees: the 7.00% prime rate H.15 shows for October 23 to 29, 2026, plus an assumed 5-point margin. Line pricing varies by lender and borrower.
| Where the $20,000 comes from | Cost per bill (20 days) | Cost per year (12 bills) |
|---|---|---|
| Checking that pays 0% | $0 in interest | $0 in interest |
| Savings that would earn 4.00% | $43.84 | $526.03 |
| A line of credit at 12.00% | $131.51 | $1,578.08 |
The per-bill math is $20,000 × rate × 20 ÷ 365. Over a year, paying early leaves you holding about $13,151 less cash on average ($20,000 × 240 days ÷ 365). Even the 0% row has a price: that's $20,000 you no longer have when payroll or a slow-paying customer shows up.
How an early payment discount changes the math
Terms of 2/10 net 30 mean 2% off if you pay within 10 days, with the full amount due in 30. Taking the discount is the same 20-day move as in our example, except the supplier compensates you for it. The annualized value is the discount ÷ (100% − the discount) × 365 ÷ 20.
| Terms (assumed) | Discount on $20,000 | Annualized value | Net per bill after 12.00% interest on $20,000 | Net per year |
|---|---|---|---|---|
| 2/10 net 30 | $400 | about 37.2% | +$268.49 | +$3,221.92 |
| 1/10 net 30 | $200 | about 18.4% | +$68.49 | +$821.92 |
| 0.5/10 net 30 | $100 | about 9.2% | -$31.51 | -$378.08 |
| No discount | $0 | 0% | -$131.51 | -$1,578.08 |
At the assumed 12.00% line rate, a discount has to be worth more than about 0.66% of the bill ($131.51 ÷ $20,000) to cover the borrowing. Against 4.00% savings, the break-even is about 0.22% ($43.84 ÷ $20,000). When a discount clears that bar, any PAYDEX lift comes along at no extra cost. Without one, you're paying to change how a reported payment is labeled.
When paying vendors early to boost PAYDEX above 80 is worth it
| Your situation | What we'd lean toward | Why |
|---|---|---|
| Discount above your cost of funds | Pay early and take it | The discount covers the cash |
| No discount, cash well above your reserve, supplier reports to D&B | Paying early is a modest cost | About $526 a year of lost yield in the example |
| No discount, paying early means drawing on a line | Pay on the due date | About $1,578 a year of interest in the example |
| Supplier doesn't report to D&B | Pay on the due date | Unreported payments can't be considered |
| Uneven or seasonal cash flow | Pay on the due date, build a reserve | A late bill elsewhere can erase the gain |
| Applying for credit soon | Get every account on time first | We found no official rule tying approval to a PAYDEX above 80 |
D&B's PAYDEX page says customers, suppliers, lenders and landlords review PAYDEX for decisions such as "Setting credit terms that more accurately reflect the level of financial risk your business represents," and its funding page says "Many banks and other lenders will look at the scores and ratings in a company's business credit file." We found no official source showing a lender treating a 90 differently from an 80. Each lender sets its own criteria, and many weigh cash flow and personal credit alongside business scores.
The Federal Reserve's Small Business Credit Survey 2026 Report on Employer Firms (6,525 responses from firms with fewer than 500 employees, fielded September 3 to November 14, 2025, a convenience sample) counts a self-reported business credit score of 80 to 100, or a personal score of 720 or higher, as "low credit risk," without naming a bureau. Low-credit-risk applicants were at least partially approved at small banks 85% of the time, against 61% for medium- and high-risk applicants (shares not adjusted for other differences between firms). A business score of 80 and one of 95 sit in the same band there.
Protect working capital before buying points
Late payments are what pull a PAYDEX down, and they tend to happen when cash runs short. In the same survey, 50% of employer firms (N=6,500) named uneven cash flow as a financial challenge in the prior 12 months. Among firms with financial challenges (N=6,183), 47% used cash reserves and 24% made a late payment or did not pay. A cash cushion, or an open business line of credit that keeps you paying on terms through a slow month, protects the score more reliably than prepaying does. See opening a line before you need it and using a line for payroll in slow months.
Lenders can also see your payables directly. Under SBA SOP 50 10 8.1 (effective October 1, 2026), the documents a CDC completes or obtains for a 504 loan application include "an aging of the accounts receivable and accounts payable," and a lender running a Working Capital CAPLine on a borrowing base certificate "must obtain the appropriate accounts receivable, accounts payable, and inventory reports." A clean A/P aging shows on-time payment whether or not suppliers report.
Before changing when you pay, ask each supplier in writing whether it reports to D&B and whether it offers discount terms for paying early. If a supplier turns down your request for terms, Regulation B applies: for trade credit, 12 CFR 1002.9(a)(3)(ii) says the creditor must notify you of the action taken "within a reasonable time, orally or in writing," and give a written statement of reasons if you make a written request within 60 days of its notification. For the wider file, see how to build business credit.