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Invoice Due-Date Calculator

What your payment terms cost you in working capital.

$
Cash tied up in unpaid invoices
$102,575
Of which is beyond your own termsThe part you are entitled to chase today.
$43,397
Revenue per day
$1,973

What this assumes

  • Days sales outstanding is your real average, not your stated terms: they are rarely the same.

Why this number matters

Thirty-day terms that are paid in fifty-two are a loan you are making to your customers, at your expense, and usually at a worse rate than your bank would charge you for the same money. Putting a number on that loan is what finally changes the conversation: it stops being an admin annoyance and becomes a five-figure line you are financing. Tightening the gap is almost always cheaper than borrowing to cover it.

How it is worked out

  • Revenue per day = monthly revenue × 12 ÷ 365
  • Cash tied up = revenue per day × the days customers actually take to pay
  • Beyond your terms = revenue per day × (actual days − your stated terms)

The same formulas run in your browser as you type; nothing you enter is sent anywhere.

Invoicing in Primemgr

Turn an accepted quote or a finished job into an invoice in one click, and see what each customer still owes. Invoicing: how it works.

Start free trialSee pricingCard needed. First charge on day 14.

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