Commercial & small business

Commercial solar quick payback estimator

Just three numbers and a ballpark payback period in under a minute. No production estimates or tax brackets needed. For the full breakdown, use the complete payback calculator afterward.

Your numbers

1 Quick estimate
From an installer quote, or roughly $2.50 to $4 per square foot of roof or ground space.
Take this from a recent utility statement.
How much of your current bill the system is expected to cover.
Leave blank if your state or utility doesn't offer one.

This estimator assumes the standard 30% federal ITC and doesn't include MACRS depreciation, O&M costs, or rate escalation. For those, use the full payback calculator.

How it works

Three numbers, one fast estimate

Step 1 Building type is a rough guide at best. The solar panel calculator in our System Sizing section can help you confirm the size from your actual electricity use.

Grab a ballpark system cost

Use an installer quote if you have one, or a rough $2.50 to $4 per square foot estimate. For a more exact number first, try the size by square footage tool. Before you budget, check what you can claim back. The rebate stacking tool in our Rebates & Incentives section estimates the federal credit and state rebates for a system like this one.

Step 2

Pull your monthly electric bill

Any recent statement works. This tool assumes a standard 30% ITC automatically, so you don't need to look that up, though the ITC calculator covers bonus adders if your site qualifies for more.

Step 3

Get your number, then go deeper if it looks good

If the ballpark payback looks attractive, run the full payback calculator next for a number that includes depreciation and O&M.

Understanding your quick payback estimate

What this number tells you, fast

With just your system cost and monthly electric bill, you can get a ballpark payback period in under a minute. A $145,000 system offsetting 90% of a $2,000 monthly bill, after the 30% ITC and a $5,000 rebate, pays back in about 4.5 years on this simplified estimate. That's enough to know whether solar is worth a closer look at your facility. If you don't have an exact electricity rate handy, the EIA's Electric Power Monthly report tracks the current national average commercial rate, which was running around $0.135/kWh as of mid-2026, useful for sanity-checking whatever your bill actually shows.

Why this runs a bit longer than the full calculator

This quick version skips MACRS depreciation, rate escalation, and O&M costs to give you a number fast. Those factors usually shorten the real payback period, so this estimate tends to run slightly longer than the full commercial solar payback calculator, which accounts for all of them. The 25-year lifetime savings calculator in our savings and payback section covers similar territory from a residential-scale angle if you want a second reference point.

When to use the quick version versus the full calculator

Use this tool first, when you're still deciding whether solar is worth exploring for your business and just want a fast gut check. Once you have an actual installer quote and want to see the full tax picture, move to the full payback calculator or the ITC calculator for the exact numbers, or the solar panel calculator in our system sizing section if you're still working out roughly what size system you'd even need. The Department of Energy's guide to going solar is a good general starting point if you're brand new to evaluating a system.

What this calculator doesn't account for

This is a rough first-pass estimate. It doesn't include MACRS depreciation tax savings, ongoing O&M costs, financing interest, or utility rate escalation over time, all of which change the real payback number. It also uses a single blended rate rather than accounting for demand charges, time-of-use pricing, or seasonal rate changes that show up on many commercial bills. Once you're ready for those details, the full payback calculator walks through each one. A related check is the solar panel calculator, which looks at the same question from the system sizing side.

Questions

Frequently asked

With just your system cost and monthly electric bill, you can get a ballpark payback period in under a minute. A $145,000 system offsetting 90% of a $2,000 monthly bill, after the 30% ITC and a $5,000 rebate, pays back in about 4.5 years on this simplified estimate.

This quick version skips MACRS depreciation, rate escalation, and O&M costs to give you a number fast. Those factors usually shorten the real payback period, so this estimate tends to run slightly longer than the full commercial solar payback calculator.

Multiply your building's square footage by roughly $2.50 to $4 per square foot for a rough commercial solar cost estimate, or use the size by square footage tool for a more precise number before running this estimator.

Yes, this quick estimator applies the standard 30% ITC automatically. If your project doesn't meet the labor requirements and only qualifies for the 6% base rate, use the full commercial solar payback calculator instead, where you can select the exact rate.

Related tools

Go deeper on this system

Full commercial payback calculator Commercial solar ROI calculator System size by square footage Commercial ITC calculator Small business quick size estimator Small business solar loan calculator Commercial solar 25-year TCO calculator All commercial & small business tools