Create an invoice

Write an invoice, check the live preview, and save it as a draft or send it.

Updated November 3, 2026 · Plain 0.110.0

  1. Go to Sales and select + New invoice (or + Create → Invoice).
  2. Choose the Customer, or select + New to add one.
  3. Check the Issue date and Due date. The due date follows the customer's terms.
  4. Choose whether Amounts are tax exclusive or tax inclusive.
  5. Add each line: Description, Quantity, Rate, any Discount %, the Income account and the sales tax code. Select + Add another line for more.
  6. Check the Live preview on the right. It shows exactly what your customer will see.
  7. Select Save draft, or Approve & send if it's ready.
A new invoice: customer (1), add a line (2), save a draft (3) or approve and send (4).

Sales tax. Plain doesn't calculate US sales tax yet. Mark lines Non-taxable, Exempt or External tax and add the tax you've worked out as a separate line. See Tax codes explained.