LetterwaxYour invoices

An estimate that becomes the invoice

Send the estimate, and when the client agrees, turn it into an invoice with one click. No retyping, no second document to keep in step.

EIN

Estimate

No.
Issued
October 27, 2026
Valid until
November 10, 2026

Billed to

EIN
DescriptionQtyPriceAmount
$3,200.00
$900.00
Subtotal
$4,100.00
Discount %
$0.00
Tax rate %
Total
$4,100.00

Payment details

Notes

The real editor, with a sample. Change anything; it is not saved here.
A page from a merchant’s ledger, Pittsboro, North Carolina, 1832A handwritten invoice from a lumber dealer in Oakesdale, Washington, 1890A machine works’ letterhead and handwritten letter, Hannover, 1890
A merchant’s ledger, North Carolina, 1832.

How it works

Estimates count on their own, from QT-0001, so your invoice numbers stay unbroken.

A valid-until date prints in place of a due date, so the price has an end.

Share it as a link and your client reads it as a clean page, or download the PDF.

When they say yes, Turn into invoice makes the invoice with every line, dated today and due in two weeks.

Questions

  • Often an estimate is a best guess and a quote is a fixed price. Letterwax calls it an estimate in the US; say in Notes if the price is fixed.

  • No. Only invoices count in your totals and in the summary for your accountant.

  • Yes. Edit it and send a new link; each link shows the version it was made from.

Often an estimate is a best guess and a quote is a fixed price. Letterwax calls it an estimate in the US; say in Notes if the price is fixed.

Writean

Opens the editor with their name already on the page. Nothing is sent anywhere.