Free Invoice Generator

Payment schedule calculator

Split a project into a deposit and the payments after it. Percentages rarely divide a total into whole cents, so this rounds each payment to within the smallest unit of its share and spreads what is left over across the later payments, so they always add up to exactly the total.

The project

The whole price of the project. If you charge tax, enter the price before it and add the tax to each invoice as it goes out.

Used only if you press Create this invoice, at the start of the line it becomes.

The payments

One row per payment, in the order they fall due, each with its share of the project.

The invoice to create

Each payment is its own invoice when it falls due. Pick the one to create.

GuideDeposits and progress billingHow this works, and where the figures go wrong →

What the payment schedule calculator does not do

  • It does not suggest a split. How much to ask up front depends on the project, the client and what your contract says, none of which are arithmetic.
  • It does not set dates. Payments here are in order, not on a calendar; for when each invoice falls due once it is sent, use the invoice due date calculator.
  • It does not add tax. Enter the project before tax and add it to each invoice in the editor: tax worked out on each payment can differ by a cent from tax worked out on the whole, and it is each invoice that has to be right.
  • It does not keep anything. Nothing is written to your browser's storage while you use it and nothing is sent to us, so the figures are gone when you close the tab. Press Create this invoice if you need a document: the payment is handed to the invoice generator in this tab, cleared as soon as it opens, and saved there as a new invoice alongside any you already have.

Related

To take a deposit already paid off a final invoice, use the invoice calculator, which has a row for it. For a monthly fee rather than a project price, see the retainer calculator, and for a month that starts part-way through, the pro-rata calculator.

Last updated 24 September 2026