Days Beyond Terms, usually shortened to DBT, is the dollar-weighted average number of days a business pays its invoices after the contractual due date. A DBT of zero means every bill cleared on or before the due date on a dollar-weighted basis. A DBT of 30 means payments, weighted by invoice size, arrived about a month late. Dun & Bradstreet feeds this figure directly into the PAYDEX score, which is why it sits near the top of any commercial credit conversation.
How DBT Is Calculated
DBT is a dollar-weighted average, not a simple average of late days. That distinction is the whole point of the metric. A $50,000 invoice paid 10 days late moves the number far more than a $500 invoice paid 45 days late, because the calculation gives each invoice weight in proportion to its dollar value.
The math runs in three steps:
- For each invoice paid after its due date, record the number of days between the due date and the actual payment date. Invoices paid on time or early count as zero.
- Multiply each invoice’s late days by its dollar amount. A $10,000 invoice paid 15 days late produces a weighted value of 150,000.
- Sum all the weighted values and divide by the total dollar volume of invoices in the period. The result is your DBT.
A Worked Example
Take a quarter with three invoices: $20,000 paid 5 days late, $50,000 paid on time, and $30,000 paid 10 days late. The weighted sum is (20,000 × 5) + (50,000 × 0) + (30,000 × 10), which equals 400,000. Divide by the $100,000 total invoiced, and DBT comes out to 4.
Most accounting systems pull the underlying data from the accounts payable aging report automatically. The math is only as good as the inputs, though, so due dates and payment clearing dates need to be recorded accurately for the number to mean anything.
What Counts as “Late”
Late is measured against the contractual due date, whatever that date is. On net-30 terms, day 31 is late. Payments made inside an early-discount window (for example, the first 10 days of a “2/10 net 30” arrangement) count as zero late days and can actually push your PAYDEX above the on-time baseline into the “discounts” or “anticipates” range. The American Productivity and Quality Center has reported that only about 15% of invoices are paid inside early-discount windows, largely because internal approval processes eat the time before the window closes.
How DBT Maps to the PAYDEX Score
Dun & Bradstreet converts DBT into a PAYDEX score on a 0 to 100 scale. Higher is better. The breakpoints are worth memorizing if you’re setting internal payment targets:
- PAYDEX 100: payments anticipate terms, well before the due date
- PAYDEX 90: payments made within early-discount windows
- PAYDEX 80: prompt payment, 0 DBT, paid on or by the due date
- PAYDEX 70: 15 days beyond terms
- PAYDEX 60: 22 days beyond terms
- PAYDEX 50: 30 days beyond terms
- PAYDEX 40: 60 days beyond terms
- PAYDEX 30: 90 days beyond terms
- PAYDEX 20: 120 days beyond terms
- PAYDEX 0 to 19: over 120 days beyond terms
A PAYDEX of 80 is the baseline for “good” and corresponds to a DBT of zero. Anything below 80 tells suppliers pulling your file that you routinely pay late.1Dun & Bradstreet. Paydex Score Factsheet
Because PAYDEX is itself dollar-weighted from reported trade experiences, a single large invoice paid very late can pull the score down even when dozens of smaller invoices went out on time. That asymmetry catches a lot of businesses off guard.
Why DBT Matters to Suppliers and Lenders
Both Dun & Bradstreet and Experian Business fold payment performance into their commercial credit profiles. D&B uses trade references reported through its Trade Exchange program. Experian draws on data from the Small Business Financial Exchange (SBFE), a consortium where nine of the ten largest U.S. commercial banks and all ten of the largest business card issuers contribute payment records.2Small Business Financial Exchange. SBFE Home SBFE data feeds Experian’s risk management products, giving the bureau a wide view of how businesses handle their obligations.3Experian. Small Business Financial Exchange
Suppliers use those profiles to decide whether to offer net-30 or net-60 terms. Lenders use them to price commercial loans. A business carrying DBT above 30 (PAYDEX around 50) will find that new suppliers demand cash on delivery or a personal guarantee from the owner. Existing credit lines can also come under review. A sharp jump in DBT can trigger covenant reviews on outstanding loans, and severe deterioration can lead a lender to declare a technical default even though the borrower hasn’t missed a payment to the bank.
The effects compound. Higher perceived risk means higher rates, smaller lines, tighter trade terms, and less working capital, which makes on-time payment harder still. That feedback loop is what makes DBT worth watching before it becomes a crisis.
DBT in Bankruptcy Preference Defenses
DBT history also matters in a setting most owners don’t anticipate: bankruptcy litigation. Under 11 U.S.C. § 547, a bankruptcy trustee can claw back payments a debtor made to creditors shortly before filing. The lookback is 90 days for ordinary creditors and one year for insiders.4Office of the Law Revision Counsel. 11 USC 547 – Preferences
Section 547(c)(2) shields payments made in the ordinary course of business. If a company historically paid a supplier 15 days late and continued at that pace before filing, those payments look ordinary. If it suddenly paid that supplier on day 1 while letting everyone else slide to 60 days, the trustee has an argument that the accelerated payments were preferential. Consistent DBT records across trade lines are the strongest evidence a creditor can bring to defend against a preference action.
How Federal Contractors See a Different Framework
Businesses selling to the federal government don’t rely on DBT for the government’s own payment behavior. Under 31 U.S.C. § 3903, federal agencies must pay invoices within 30 days of receiving a proper invoice unless the contract says otherwise, and interest accrues automatically if they miss the deadline.5Office of the Law Revision Counsel. 31 USC 3903 – Regulations Treasury sets the interest rate semiannually; for January through June 2026 it is 4.125%.6Bureau of the Fiscal Service. Prompt Payment Contractors should track those deadlines, because the interest penalty is owed automatically but agencies do not always self-report it.
Reducing Your DBT
Improving DBT is straightforward in concept and hard in execution, because the root cause is almost always cash flow timing rather than negligence. A handful of moves actually shift the number:
- Automate invoice approvals. The biggest time sink in most accounts payable operations is getting invoices reviewed, approved, and queued. Cutting a week out of that workflow is often the difference between paying on day 28 and day 35.
- Prioritize by dollar weight. Since DBT is dollar-weighted, one large invoice paid late hurts more than several small ones. When cash is tight, pay the biggest invoices first.
- Negotiate terms that match your cash cycle. If receivables arrive around day 45 but payables are due on day 30, you’ll always be scrambling. Net-45 or net-60 terms from key suppliers align outflows with inflows.
- Use a credit line as a bridge. Interest on a revolver used to pay trade invoices on time is often cheaper than the damage a high DBT does to your borrowing rates and supplier terms.
- Capture early payment discounts. Paying inside a 2/10 window earns roughly 36% annualized on the accelerated cash, and it pushes PAYDEX above 80 into the “discounts” tier.
The businesses that keep DBT low over time treat it as a finance metric reviewed monthly, not an accounting detail discovered during a loan application. By the time a lender flags it, the effect on your rates and terms has already happened.