Use this calculator to estimate the equivalent number of credit-sales days represented by the current receivables balance on a stated basis. It is not the actual age of any individual invoice, and it does not decide whether a customer is entitled to withhold payment.
What to enter
Enter receivables, credit sales for the same basis and period, and the number of days in that period. Use the same basis for the amount owed and credit sales.
What the result means
The result is indicative debtor days. A zero credit-sales amount does not produce a debtor-days result because there is no meaningful sales basis for the calculation.
Worked example
Receivables of £1,200 and credit sales of £20,000 over 30 days produces 1.8 equivalent credit-sales days. Use it alongside the actual age of individual invoices and agreed payment dates; it does not replace them.
Limitation and next step
Review disputes, credit notes and promised payment dates before escalating a collection action. Use the receivables register to record the next follow-up.
Important
General information only. It is not a tax, accounting, legal or financial determination for a particular business.
Next step
Use the result with the aged-debt record to choose the customer or invoice that needs the next follow-up.
Sources and review
- Evidence check date: 5 November 2026.