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Calculate your system cost, tax credits, payback period, and 25-year ROI. Adjust system size, state, and incentive eligibility to see instant results.
Commercial solar costs $1.10-2.55/W installed in 2026 depending on size. A 100kW system costs ~$170K before incentives. After 30% ITC ($51K), MACRS depreciation (~$25K), and state incentives, net cost is typically $65K-95K. With annual savings of $15K-30K, payback is 3-5 years and 25-year ROI exceeds 300%.
100 kW
System Cost
$165K
Federal ITC
-$66K
Net Cost
$24K
Payback
0.6 yrs
Annual Savings
$39,210/yr
25-Year ROI
4976%
CO2 Offset
1225 tons
Drag the slider to your desired system size in kW. Small business: 25-100kW. Mid-size: 100-500kW. Large: 500kW-2MW.
Choose your state to apply local electricity rates, state incentives, and production factors.
Toggle prevailing wage and domestic content to see how bonus credits affect your bottom line.
See your system cost, ITC credits, net cost, payback period, annual savings, 25-year ROI, and CO2 offset.
This calculator provides estimates based on average pricing, production, and incentive data for 2026. Actual costs vary by site conditions, equipment selection, and local utility policies.
Our engineers perform detailed site analysis, shade modeling, and financial modeling for your specific property. Free, no-obligation assessment.