Window installation estimates are priced per unit for standard replacement windows. Labor runs $150–$350/window depending on window type, frame condition, and interior/exterior finish work. The window unit itself is the major cost driver — materials typically represent 60–70% of the total project cost. This invoice template comes pre-filled with 7 common window installer line items — add your business and client info, adjust any value, and print or download as PDF.
Line items, tax, discounts, deposit deduction, and balance due — all in one professional invoice.
Your Business Info
Bill To
Invoice Details
Line Items
| Description | Unit | Qty | Unit Price | Total | |
|---|---|---|---|---|---|
$ | $1,350.00 | ||||
$ | $2,910.00 | ||||
$ | $390.00 | ||||
$ | $330.00 | ||||
$ | $570.00 | ||||
$ | $150.00 | ||||
$ | $225.00 |
Tax, Discount & Deposit
Notes (optional)
Did this job end up costing more than you thought? Use Suparate AI next time to catch hidden costs before you start — it scans job site photos to ensure you never miss a material or labor expense again.
Invoice Date
April 14, 2026
Due Date
April 28, 2026
Balance Due
$6,399.00
Bill To
—
| Description | Unit | Qty | Price | Total |
|---|---|---|---|---|
| Labor — window replacement installation | Each | 6 | $225.00 | $1,350.00 |
| Window units (double-hung, double-pane) | Each | 6 | $485.00 | $2,910.00 |
| Sill pan flashing and window wrap | Each | 6 | $65.00 | $390.00 |
| Exterior caulk, trim, and touch-up | Each | 6 | $55.00 | $330.00 |
| Interior casing and stool — reinstall | Each | 6 | $95.00 | $570.00 |
| Low-expansion spray foam insulation | Each | 6 | $25.00 | $150.00 |
| Building permit (if required by municipality) | Each | 1 | $225.00 | $225.00 |
Point your camera at the job site. Suparate scans the scope, flags materials you'd miss, and builds the estimate — so the invoice always matches reality.
Register manufacturer warranties for the client
Many manufacturers require warranty registration within 30 days of installation. Do it for your clients — note the registration number on the invoice. It's a differentiator that shows you care about the long-term value of your work.
Photograph completed windows from both exterior and interior
Document the finished installation inside and out. These photos protect you if a future claim is made about flashing or caulk quality, and they build your portfolio.
Include a caulk touch-up note at 12 months
Exterior caulk around windows can develop minor gaps in the first year due to building movement and thermal expansion. Offering a free 12-month caulk check-up ($0 labor) builds loyalty and prevents small gaps from becoming a water intrusion claim.
50% deposit before ordering windows (windows are custom-made to size and cannot be returned), balance on completion. For large projects (10+ windows), a three-payment structure: 40% deposit, 40% on delivery, 20% on completion. Window lead times run 4–12 weeks for custom orders — the deposit protects your order cost.
Window brand, series, product code, glass package (double vs. triple, low-E coating, gas fill), size, quantity, and any specified options (grids, tilt-in wash, egress compliance note). This level of detail serves as the homeowner's permanent record of what was installed — useful for insurance claims, re-sale, and warranty registration.
1 year on labor for installation defects (air/water infiltration around the unit, improper operation, casing gaps). The window manufacturer provides their own warranty on the unit (typically 10–25 years, sometimes lifetime). Register the warranty on behalf of the client and note the registration number on your invoice.
Stop work, photograph the damage, call the client, and issue a written change order before proceeding. 'Rotted sill plate at master bedroom window — replaced with pressure-treated lumber — CO-001: $285.' Never proceed with structural repairs without written approval and a change order. These discoveries are common in window work — have a standard process ready.