Energy Bill HQ
Solar bill planning calculator

Solar Savings Calculator

Use this tool when your main question is how a U.S. household electric bill could change after solar, rather than the install payback itself.

U.S.-focused assumptionsEditable calculator inputsPlanning estimate only

Compare your bill before and after solar

Enter your zip code and current monthly electric bill to generate an instant, automated cash-flow estimate.

How this works

Once you enter your current monthly bill, we automatically estimate your after-solar bill using a standard 90% offset. Add your zip code when you want localized context.

Live resultsZIP optional

Ready for your estimate

Enter your current monthly bill to generate a savings estimate.

We will estimate a standard after-solar bill for you as soon as you enter your current monthly electric bill. Add your zip code when you want localized context.

Planning note

Enter your current monthly bill first. Zip code is optional and only adds localized context to this bill-only estimate.

Assumptions

What this estimate includes

  • This calculator assumes the difference between your before and after bill is your savings.
  • Projected savings use a constant annual utility inflation assumption.
  • We automatically estimate your after-solar bill assuming a 90% offset, which leaves a standard monthly grid connection fee. You can override this if you have an exact quote.

Best fit

Who this calculator is for

  • Homeowners who want a fast before-and-after electric bill scenario.
  • People who do not have an installer quote yet but still want a planning number.
  • Anyone comparing a simple solar bill estimate with a heat pump scenario or a full payback model.

Key drivers

What changes your savings the most

  • Current monthly bill. Higher starting bills create more room for savings.
  • Expected after-solar bill. This is your largest manual override if you have a real quote.
  • Years of ownership and utility-rate growth. Longer ownership and faster rate growth raise cumulative savings.

Limits

What this calculator cannot tell you yet

  • It does not price your solar system, financing, roof work, or maintenance.
  • It does not confirm roof shading, usable roof area, or contractor-specific production.
  • Use the Solar Payback Calculator once you have an install-cost quote.
  • Review assumptions and sources before using this estimate to compare proposals.

Planning use

Use this quick estimate before you collect quotes

This page is intentionally lighter than the full payback model. It is best for first-pass bill framing, not final solar-buying decisions. The goal is to help you decide whether the bill side of the opportunity is strong enough to justify deeper quote work.

Quick example

A $210 monthly bill with a $35 after-solar bill produces about $175 in monthly savings. That is useful for a first-pass sanity check before you spend time on installer proposals.

Good enough for

Use this page when your main question is whether the current bill leaves enough room for savings, or when you want a fast side-by-side comparison against a heat pump scenario.

What Electric Bill Makes Solar Worth It?

Move up when

Switch to the full payback model once you have install cost, battery, financing, or incentive details. That is the point where a quick bill estimate stops being enough.

Solar Payback CalculatorSolar Payback Example in 2026: What Happens With a $180 Electric Bill?