Debtor days calculator
How long does it really take to get paid, and what is slow payment costing your cash flow?
The total owed to you by customers, including overdue.
Total invoiced in the period below, including VAT to match the line above.
For example 30 days.
Your debtor days
30 days
On average it takes about this long to turn an invoice into cash.
Compared with your 30-day terms
You are being paid within your terms on average.
Paid 10 days faster
£20,000
of cash released, once, because each day of debtors is worth £2,000 of sales.
A simple average. It looks at total debtors and sales, not individual invoices, so large or seasonal swings can move it. Nothing you enter here is sent or stored.
How it works
Debtor days, also called days sales outstanding, is the average number of days it takes to collect payment on an invoice. It is your unpaid sales invoices divided by your sales over a period, multiplied by the number of days in that period.
For example, £60,000 owed by customers against £180,000 of sales over 90 days is a third of the period, so 30 debtor days. If your terms are 30 days, customers are paying on average at the end of terms. If it comes out at 45, you are funding about two weeks of sales that you expected to have been paid already.
The "paid faster" slider shows what each day is worth. Each day of debtors equals a day of sales, so collecting 10 days faster releases ten days of sales as cash, once.
Related: Payment terms and cash flow, Late payment calculator
See which clients are slowing you down
Cadence shows overdue invoices and which clients pay late, so you can act on the ones that matter.
Start free trialIllustrative calculation, not financial advice.