How our window cost estimates work
Every estimate is built from two things you can check: what the windows cost, and what local installers are paid. This page shows the formula, every number we use, and where each one comes from. Nothing is hidden behind a "get quotes" form.
The formula
Total = window prices + installation labor + supplies and disposal + optional extras + permit
We give two answers, because the same job costs very different amounts depending on who does it:
- Buy windows + independent installer: the formula above.
- Full-service window company (brands that sell and install their own windows): the independent total × 1.6–3, typically × 2. This ratio matches the gap between installed prices published by large brands and independent-installer prices in our competitor test.
1. Window prices
We start from the price of one standard window (about 3 × 5 feet, double-hung, double-pane low-E glass) in vinyl, then adjust for material, style, size and glass.
| Quality tier (vinyl, standard size) | Window only |
|---|---|
| Budget | $250 |
| Mid-range | $400 |
| Premium | $600 |
| Frame material | Adjustment |
|---|---|
| Vinyl | base |
| Aluminum | −15% |
| Fiberglass | +25% |
| Composite | +30% |
| Wood or wood-clad | +40% |
| Window style | Adjustment |
|---|---|
| Double-hung | base |
| Single-hung | −20% |
| Sliding | base |
| Awning | base |
| Casement | +25% |
| Picture (fixed) | +10% |
| Egress | +60% |
| Bay (whole unit, mid-range vinyl) | $1,800 |
| Bow (whole unit, mid-range vinyl) | $2,600 |
Size: small windows −20%, large windows +40%. Glass: triple pane +20%, impact-rated +60%.
2. Installation labor
Labor is priced from the median hourly wage of glaziers (the trade that installs windows) published by the U.S. Bureau of Labor Statistics for May 2025. We use the wage for your metro area when BLS publishes one (390 metro areas; glazier wages in 161 of them, with carpenter wages adjusted by the national glazier-to-carpenter ratio of 0.963 in the rest). Rural ZIP codes use the state figure.
- Billed rate = wage × 2.4. The multiplier covers payroll taxes, workers' compensation and liability insurance, vehicles, tools, overhead and profit.
- Hours per standard window (crew of two, combined): insert installation 3.5 hours; full-frame 7 hours. Second-floor work adds 25%.
- Small jobs carry a minimum labor charge of $300.
3. Supplies, extras and permit
| Item | Per window (low – high) |
|---|---|
| Caulk, insulation, fasteners and old-window disposal | $30 – $70 |
| Aluminum exterior trim capping | $75 – $160 |
| New interior trim and casing | $60 – $160 |
| EPA lead-safe (RRP) work practices, pre-1978 homes | $50 – $150 |
| Building permit (per job, varies by city) | $100 – $400 |
Full-frame installation includes new interior trim and a permit by default, because most cities require one.
4. Low, typical and high
The typical figure uses the median wage and our standard hours and prices. Low uses the 25th-percentile wage, window prices 15% lower and hours 20% shorter. High uses the 75th-percentile wage, prices 15% higher and hours 20% longer. Final figures are rounded to the nearest $10.
Worked example: 10 windows in Dallas
Ten standard double-hung windows, mid-range vinyl, insert installation, ZIP 75201 (Dallas-Fort Worth-Arlington, TX).
| Windows: 10 × $400 | $4,000 |
| Labor: 35 hours × $23.78 wage × 2.4 = 35 × $57/hour | $2,000 |
| Supplies and disposal: 10 × $45 | $450 |
| Independent installer, typical | $6,450 |
|---|---|
| Independent installer, range | $5,150 – $8,120 |
| Full-service company, range | $10,320 – $19,340 |
How this compares with other published estimates for the same job is on our accuracy report.
What we don't include
- Sales tax, which varies by state and city.
- Rot, structural or siding repair found when the old window comes out.
- Custom shapes (arches, circles), special colors and decorative grilles.
- Tax credits. The federal 25C credit for energy-efficient windows ended for windows installed after December 31, 2025, so it no longer lowers the cost of a 2026 project.
Limits of this estimate
Window prices are national averages; we adjust labor by location but not product prices. In the most expensive cities, real quotes can run above our high figure because of insurance, parking and building rules. Use the estimate to plan a budget and judge quotes, then get at least three written quotes.
Every number on this page is generated from the same data file the calculator uses (version 2026-11-14), so this page and the calculator can't disagree. Full source list: data sources.