Window Replacement Cost Calculator
Estimate the cost of new windows by window type, size, and quantity. Includes the 2026 ENERGY STAR 25C tax credit (30% up to $600/window), material costs, labor, and old window removal. Free, no sign-up required.
Total windows in your project. Typical whole-home replacement: 10-20 windows.
Enter your own installed cost per window (material + labor).
Larger windows cost more per unit. Material estimates already include size baseline.
Style affects material cost and labor complexity.
Retrofit is faster and cheaper. Full-frame is needed for damaged frames or size changes.
Typical: $30-$100 per window for removal and disposal.
🚪 Estimated Total Cost (before tax credit)
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Windows
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Per Window
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Tax Credit
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Net Cost
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📊 Cost Breakdown
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Costs vary by region, window brand, energy ratings, and project complexity.
💡 What this means
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🎉 ENERGY STAR 25C Tax Credit (2026)
Claim 30% of installed window cost (up to $600 per window) on your federal taxes. Annual cap is $1,200 for windows + doors + insulation combined ($2,000 cap if you also install a qualifying heat pump). Windows must meet 2023 ENERGY STAR Most Efficient criteria (U-factor ≤ 0.22, SHGC ≤ 0.23 for most climate zones). Save your NFRC labels and receipts; file IRS Form 5695 with your return. Credit is nonrefundable but carries forward to future tax years.
🛒 See ENERGY STAR windows on Amazon
🛒 Shop ENERGY STAR windows →📝 How to use this window replacement cost calculator
- Enter window count — total number of windows you are replacing. Typical whole-home projects run 10-20 windows.
- Choose frame material — vinyl (most affordable), wood (classic), fiberglass (durable, paintable), aluminum (modern, strong), composite (premium blend), or set a custom installed cost per window.
- Pick window size — small (bathrooms), standard (most homes), large (living rooms), or extra large (bay, bow, oversized).
- Select window style — double-hung, casement, sliding, picture (fixed), awning, or bay/bow. Style affects cost and labor.
- Choose installation type — retrofit (insert into existing frame) or full-frame replacement (new frame, trim, weatherproofing).
- Toggle options — include old window removal, ENERGY STAR certification (qualifies for the 30%/$600 tax credit), and interior trim upgrade.
- Click Calculate — see gross cost, per-window cost, estimated 2026 ENERGY STAR tax credit, and net cost after credit.
📌 5 tips for window replacement projects
- ✓ Buy all windows in one order. Manufacturers offer 10-20% volume discounts on orders of 10+ windows. Mixed-batch orders also risk color/finish mismatches across production runs. Get a single shipment for consistency.
- ✓ Check the NFRC label for U-factor and SHGC. Every certified window has a National Fenestration Rating Council sticker. For the 2026 ENERGY STAR 25C tax credit, you need U-factor ≤ 0.22 AND SHGC ≤ 0.23 in most U.S. climate zones. Save the labels with your tax records.
- ✓ Schedule replacement in mild weather. Spring and fall are ideal — moderate temperatures, less demand on contractors, and off-peak discounts of 5-15% versus summer. Avoid installing in rain or freezing temps (sealants need 24-48 hours above 40°F to cure properly).
- ✓ Retrofit when possible, full-frame when needed. Retrofit (insert) installation fits the new window into your existing frame — faster, cheaper, less interior disruption. Full-frame replacement is required if your existing frame is rotten, warped, or you want to change the window size. Get a contractor to inspect first.
- ✓ Stack the 25C credit with utility rebates. Many gas and electric utilities offer $50-$300 per window rebate on top of the federal tax credit. Some states (CA, NY, MA) layer additional credits. Check Database of State Incentives for Renewables & Efficiency (DSIRE) for your state before you buy.
Disclaimer: This calculator provides estimates for educational purposes only. Actual window replacement costs vary significantly based on region, window brand, glass package (double vs. triple pane, gas fills, low-E coatings), frame material, installation complexity, accessibility, and local labor rates. Tax credit calculations follow the 2026 IRS Section 25C rules (30% of installed cost, up to $600/window, $1,200 annual cap for most homeowners) but eligibility depends on the specific window's NFRC ratings and your tax situation. Consult a tax professional and obtain multiple contractor quotes before making purchasing decisions. This tool is not a substitute for professional window replacement or tax advice.
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