Is Solar Worth It in 2026? Here's the Math

Most articles answer this question with a range so wide it's useless — "8 to 15 years, depends on your situation." That's true and unhelpful.

This page does something different. It gives you the actual formula, plugs in verified 2026 costs and real utility rates, and shows you the arithmetic so you can run it for your own house in about two minutes.

The short version: at the U.S. average electricity rate, a typical home solar system pays for itself in about 10.7 years and nets roughly $41,000 over 25 years. Whether your number is better or worse than that comes down almost entirely to one variable — and it isn't sunshine.

Want the two-minute version instead? Get a free quote comparison → and we'll show you real pricing from vetted installers in your area.

The only formula you need

Solar payback is one division problem:

Payback (years) = Total system cost ÷ Annual electricity savings

And annual savings is another:

Annual savings = Annual production (kWh) × Your electricity rate ($/kWh)

That's it. Everything else — panel brand, inverter type, warranty length — matters for reliability, not for whether the investment makes sense.

To fill in the formula you need three numbers:

1. Your system cost. The 2026 national average is $2.60 per watt installed, before incentives — about $31,135 for the typical 12 kW home system.
2. Your annual production. As a planning figure, use 1,400 kWh per kW of installed capacity per year. For a 12 kW system that's about 16,800 kWh annually. Run your exact address through NREL's free PVWatts calculator to replace this estimate with a real one — shading, roof pitch and direction move it significantly.
3. Your electricity rate. It's on your utility bill. The U.S. residential average was 17.30¢/kWh in 2025.

What solar actually costs in 2026

There is no federal tax credit for a purchased residential system in 2026. The 30% Residential Clean Energy Credit (Section 25D) expired for any expenditure made after December 31, 2025.

One detail that catches people out: the IRS treats the expenditure as made when installation is completed, not when you paid. Homeowners who signed and paid in late 2025 but whose install finished in 2026 do not get the credit.

This changes the math in a way most older articles haven't caught up with. The sticker price is your price now. When you see an article quoting "$20,000 after the tax credit," it's describing a world that ended in 2025.

Current installed pricing varies widely by state — from about $2.30/W in Arizona to $3.81/W in Alabama. Our 2026 solar cost guide breaks down what drives the spread.

What does still reduce your cost:

• State and utility incentives — rebates, performance payments, and state tax credits, which vary enormously. See 2026 solar incentives.
• Leases and PPAs — third-party-owned systems, where the provider claims the commercial 48E credit and passes some of the benefit through in the rate. You don't own the system. See solar financing options and what's left of the solar tax credit.

Your break-even electricity rate

Here's the framing that actually answers "is it worth it," and almost nobody publishes it.

Hold system cost and production constant, and ask: what electricity rate do I need to pay for solar to hit a given payback?

At the national average ($2.60/W, 12 kW system, 16,800 kWh/year):

Now compare that to your bill.

The U.S. average of 17.30¢/kWh lands just under the 10-year line — which is where that 10.7-year national figure comes from. If you pay more than about 18.6¢, you're beating a 10-year payback. If you pay under 12.4¢, solar takes 15+ years to break even and you should think carefully.

This single comparison tells you more than any online calculator.

Three worked examples

All three use a 12 kW system at 1,400 kWh/kW/year (16,800 kWh annually), state-level installed cost, and the state's average residential rate.

California — high rate, low install cost

• Cost: $2.45/W × 12,000 W = $29,400
• Rate: 31.97¢/kWh
• Annual savings: 16,800 × $0.3197 = $5,371
• Payback: 5.5 years

California is close to a best case: expensive power, competitive installer market. Details in our California solar guide.

Texas — moderate rate, cheap installs

• Cost: $2.23/W × 12,000 W = $26,760
• Rate: 14.94¢/kWh
• Annual savings: 16,800 × $0.1494 = $2,510
• Payback: 10.7 years

Texas has some of the cheapest installs in the country, but middling rates pull it right back to the national average. See our Texas solar guide.

Louisiana — cheap power

• Cost: $2.60/W (national average) × 12,000 W = $31,200
• Rate: 11.73¢/kWh
• Annual savings: 16,800 × $0.1173 = $1,971
• Payback: 15.8 years

At 11.73¢/kWh, solar takes more than 15 years to break even on cash. This is where a lease or PPA, or a strong local incentive, does the heavy lifting — or where waiting is defensible. See our Louisiana solar guide.

Notice what's driving the difference. California and Texas have nearly the same install cost. The payback gap between them is more than 5 years, and it's almost entirely the electricity rate. Sunshine matters far less than most people assume.

What solar is worth over 25 years

Payback is when you break even. The value is what comes after.

At the national average, held flat and ignoring degradation:

• Annual savings: $2,906
• 25-year gross savings: $72,660
• Less system cost: –$31,200
• Net 25-year value: about $41,460

Two forces push that number in opposite directions:

• Upward: electricity prices have been rising faster than inflation since 2022, and EIA expects the increases to continue through 2026. The nominal U.S. average electricity price rose 13% between 2022 and 2025. Every rate hike makes your existing panels more valuable — you locked in your cost, your neighbors didn't.
• Downward: panels lose roughly half a percent of output per year, so year-25 production is meaningfully below year-1.

In practice, on a typical system, rate escalation outruns degradation — but treat $41,000 as the conservative floor, not a promise.

Four things that change your answer

Net metering

This may be the second-biggest variable after your rate. Full retail net metering means every kWh you export is worth the same as one you buy. Where net metering has been cut back, exported power might be worth a third of that — which can add years to payback. Check your state in our net metering by state guide.

Your roof's actual production

The 1,400 kWh/kW figure above is a planning number. A shaded, north-facing roof might do 1,000. An unshaded south-facing roof in a sunny state might do 1,600. This is the input most worth replacing with a real number before you sign anything.

Rising electricity rates

Every calculation on this page holds your rate flat, which understates solar's value if rates keep climbing. It also means you don't need to forecast anything — if the math works at today's rate, increases are upside.

Home resale value

Berkeley Lab's multi-state analysis found buyers paid a premium of roughly $4 per watt for homes with owned solar. Two caveats worth stating plainly: that study covered home sales from 2002–2013, and solar has gotten much cheaper since, so a current premium is likely lower. It applies to owned systems — a leased system transfers a contract, not an asset.

Who should skip solar in 2026

Solar is a bad fit, or premature, if:

• Your rate is under about 12¢/kWh and you have no meaningful state incentive. Payback stretches past 15 years.
• Your roof needs replacing within 5–7 years. Do the roof first — removing and reinstalling panels costs thousands.
• You're moving within a few years. You'd likely sell before break-even and recover only part of the cost in resale value.
• Heavy shade. Run PVWatts before anything else; shading can gut production.
• Your only quotes are above $3.50/W in a low-rate state. Get more bids — that's above the national average for no clear reason.

If net metering is weak in your state, pairing solar with a battery sometimes restores the economics by letting you use your own production instead of exporting it cheaply.

Frequently asked questions

Find your number

You now have the formula. The input you can't get from an article is your actual installed price — and that varies by thousands of dollars between installers in the same zip code.

Compare quotes from vetted installers →
Free, no obligation, and real 2026 pricing before you talk to a salesperson.

Related reading: What Reddit says about solar in 2026 · 2026 solar costs · Net metering by state · Solar incentives 2026 · Solar by state