Window installation invoice template — per opening
Window invoices should read opening by opening, because that is how they were measured, ordered and installed — and how they get disputed.
An invoicing spreadsheet that opens in Excel, Numbers or Google Sheets, or prints to PDF. Pre-filled with the fields a window installation invoice needs, plus the payment terms this trade most often gets caught out by.
- Blank — the invoice fields, ready to fill in by hand.
- Auto-calculating — same sheet with subtotal, tax, deposit and balance due wired up. Formulas work in Excel and Google Sheets.
- Printable — a clean one-page layout to fill in or save as PDF.
How window installation work actually gets paid
Windows bill per opening, and the invoice should list every opening rather than a single unit count, because each one was measured, ordered and fitted separately and any one of them can be the problem. Insert and full-frame installations are different prices and must be distinguished per opening. Rot found at the sill is the standard overage and needs its allowance. On pre-1978 housing, lead-safe practices are a legal requirement with a real cost, and they belong on the invoice as evidence the work was done properly.
What a window installation invoice must contain
- Invoice number, issue date, due date and the property address
- Each opening listed with its size, location and unit installed
- Insert or full-frame installation, stated per opening
- Unit specification: frame material, glass package, U-factor and SHGC
- Rot or jamb repair found at removal, billed against the allowance
- Flashing, sill pan, insulation and air sealing per opening
- Interior and exterior trim: reused, repaired or replaced
- Lead-safe work practices where the property predates 1978
Where window installation invoices go unpaid
- One unit count billed instead of per-opening lines, so one bad window stalls everything
- Rot repair invoiced with no photograph and no prior allowance
- Egress sizing missed on a bedroom window, surfacing at inspection
- Custom units delivered late and storage absorbed without being billed or agreed
The estimate this invoice bills against
An invoice is only as defensible as the estimate it came from. BidWand writes the estimate from a plain description of the job — labour, materials, exclusions and assumptions — so the numbers on this invoice are ones the customer already agreed to.
Draft the window installation estimate behind this invoice
This generates the estimate, not the invoice — describe the job and you get the itemised figures to bill from. No email needed to see the first one.
What you get — see the format first
A complete estimate you can send to the customer, built from the rate you enter:
| Description | Qty | Unit | Unit price | Total |
|---|---|---|---|---|
| Labor — itemized by task | hrs | hour | your rate | — |
| Materials — with your markup applied | qty | ea / sq ft | cost + markup | — |
| Permits, disposal, access | — | — | — | — |
Plus a plain-English scope summary, assumptions (what had to be guessed), exclusions (what you are not doing — the section that prevents most change-order arguments), and a validity period. Printable, or send the link.
Every figure comes from the rate and markup you supply. We never fill in a market price for you.
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How to estimate
How to write a contractor estimate · Estimate vs quote vs bid — and which one you should send · What to include in a contractor estimate · How to price a job as a contractor · Should you charge for estimates? · How to follow up on an estimate · How to handle change orders · Estimate vs invoice: what's the difference? · How to raise your prices as a contractor