Federal Solar Tax Credit: What It Was and What Replaced It

> ⚠️ **CRITICAL 2026 UPDATE — READ FIRST** > > This article was originally published April 14, 2023 and explained the 30% Federal Solar Tax Credit (Section 25D) as it existed at the time. **The credit was terminated by the One Big Beautiful Bill Act on December 31, 2025.** Cash and loan buyers in 2026 no longer qualify for any federal residential solar tax credit. > > If you came here looking for current information about federal solar incentives, you need this instead: > > → **[The 30% Federal Solar Tax Credit Is Gone — What Replaced It in 2026](/blog/30-percent-federal-solar-tax-credit-terminated-obbb-2026)** > > The article below is preserved for historical reference. Do not make purchasing decisions based on it. > > — Eric Brickus, Solarfying

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Solar energy is a sustainable and environmentally friendly source of power that has become increasingly popular among homeowners. One of the most significant historical incentives for installing solar panels was the Federal Solar Tax Credit, also known as the Investment Tax Credit (ITC).

This article explores how the Federal Solar Tax Credit worked and why it was a smart investment for homes — at the time of writing.

## What Was the Federal Solar Tax Credit?

The Federal Solar Tax Credit was a federal incentive that allowed homeowners to deduct a percentage of the cost of installing solar panels from their federal taxes. The credit was initially introduced in 2006 to encourage solar adoption and was extended several times. As of this article's original publication in 2023, the credit was set at 30% of the total cost of the solar panel system for residential properties.

**Status in 2026: Terminated.** The OBBB Act ended Section 25D effective December 31, 2025. There is no federal residential solar tax credit available to cash or loan buyers in 2026 or beyond.

## How the Federal Solar Tax Credit Worked

The Federal Solar Tax Credit allowed homeowners to deduct 30% of the cost of their solar panel system from their federal taxes. To qualify, homeowners had to own their solar panel system and have it installed on their primary residence. The credit applied to the cost of the system, including installation and equipment costs, but did not cover repairs or maintenance.

For a $30,000 system, the credit was worth $9,000 — applied as a dollar-for-dollar reduction in federal taxes owed.

## Why It Was a Smart Investment (Until It Wasn't)

While the credit was active, it was a smart financial play for homeowners with sufficient federal tax liability:

- It significantly reduced effective installation cost - Combined with bill savings, payback periods were typically 5–7 years - It supported home value increases (homes with solar consistently sold for more) - It contributed to a more sustainable energy future

## What Replaced It

For most homeowners in 2026, the only remaining federal pathway is **Section 48E**, which applies to third-party-owned systems (leases and PPAs). The installer claims the credit and passes the savings through as lower monthly payments. Cash and loan buyers receive nothing federally.

**State incentives still matter.** California's SGIP for storage, Florida's sales/property tax exemptions, New Jersey's SuSI program, and others remain meaningful — and in some cases offset much of what the federal credit used to provide.

[Read the full update on what's available in 2026](/blog/30-percent-federal-solar-tax-credit-terminated-obbb-2026).

## Conclusion

The Federal Solar Tax Credit was, for nearly two decades, the single biggest financial incentive for residential solar in the United States. It made the math work for hundreds of thousands of homeowners.

It's gone now for cash and loan purchases. The financing landscape has shifted toward lease and PPA structures that still capture federal incentive via 48E. Anyone considering solar in 2026 should make decisions based on current law — not articles like this one written under the old framework.

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Need a current, OBBB-accurate solar analysis?

**Eric Brickus, Solarfying**

- Email: [eric@solarfying.com](mailto:eric@solarfying.com) - Phone: (407) 813-5731 - Get a free solar audit: [solarfying.com/quote](https://solarfying.com/quote)