Free tools
Free calculators for getting paid
Three calculators for the arithmetic around an invoice: when it is due, what a late fee on it comes to, and how many months your cash lasts when income arrives in lumps. Free, with no account. The sums run in your browser, and the figures you type are not saved or sent to us.
Net terms calculator
When an invoice is due under net, end-of-month or due-on-receipt terms, and what an early-payment discount costs as a yearly rate.
Open the calculatorLate fee calculator
What a late fee in your agreement comes to: flat, a percentage, 1.5% a month by the day or per started month, or a yearly rate.
Open the calculatorRunway calculator
How many months your cash lasts when income arrives in lumps, with invoices and contract instalments in their month and proposals weighted.
Open the calculator
The reading behind them
Each calculator explains its own arithmetic under the form, with a worked example you can reproduce. The longer pieces cover the decisions the numbers feed: which payment terms to put on an invoice, what to send when one is late, and how to forecast revenue that does not arrive every month.