Window Letter layout
Window Plain invoice template
The same envelope geometry, monochrome and hairline — a letter that folds correctly.
What you see above is the whole document — every template stays visible whatever you pay. Making an invoice with Window Plain itself is not part of the Free plan: Free covers 6 of the 60 templates, which are the 6 the generator offers, and the rest arrive with the paid plan when it launches.
For the services listed below, rendered 01 Jun — 30 Jun 2026, we invoice you $11,030.00 USD. Payment is due by 16 July 2026, 15 days from the invoice date.
| Pos. | Description | Qty | Rate | Amount |
|---|---|---|---|---|
| 1 | Platform engineeringOrder pipeline refactor, background job scheduler and the accompanying migration runbook. | 82 | $95.00 | $7,790.00 |
| 2 | Design systemComponent audit and a print stylesheet for the customer-facing documents. | 24 | $85.00 | $2,040.00 |
| 3 | On-call supportJune retainer. | 1 | $1,200.00 | $1,200.00 |
| Subtotal | $11,030.00 | |||
| VAT (0%) | $0.00 | |||
| Total Due | $11,030.00USD | |||
Please quote invoice INV-2026-07-014 as the payment reference. Kind regards,
Sample data · A4 · rendered by the product
How this sheet is set
The same envelope geometry, monochrome and hairline. A letter whose only remaining job is to fold correctly.
The Window Letter layout
Dimensioned so the recipient's address falls inside the window of a standard envelope, with fold marks bleeding off the left edge and the issuer's particulars gathered into a foot block.
Who it suits
Invoices that are actually posted, and anywhere the printed letter is still the formal channel.
Hairlines, light weights and no colour. Anything that could be a fill is a rule instead, and anything that could be a rule is often nothing at all. The sheet says as little as a sheet can while still being an invoice.
What it prints
Every template in the library prints the same set of facts — a template that dropped one would fail the library’s own contract test. What changes between them is where the facts sit and how they are set.
- Issuer and recipient, each with an address, an optional contact line, and a tax label and number you write yourself.
- Invoice number, issue date, service period, payment terms or an explicit due date, and the date of the service agreement.
- Your own references — purchase order, contract, cost centre — labelled the way your client labels them.
- Line items with a quantity, an optional unit, an optional period, a rate and an amount.
- A note field, and full banking details with an optional payment reference.
Anything you leave empty prints nothing at all — no blank labels, no placeholder rows.