The residential clean energy credit ended: Austin solar math for 2026

For a new 2026 residential solar project, the old “take 30% off for the federal credit” shortcut is no longer valid. The IRS says Section 25D does not allow the Residential Clean Energy Credit for expenditures made after December 31, 2025.

Austin homeowners still have local program value: Austin Energy currently publishes a $4,000 residential solar rebate and a 9.91¢ per kWh Value of Solar rate for systems under 1 MW. Those figures do not turn every proposal into a good investment; they are inputs to a property-specific model.

What the old credit did

Section 25D previously allowed a 30% federal tax credit for qualifying residential clean-energy expenditures. A hypothetical $25,000 eligible project at 30% produced a $7,500 credit before considering tax liability and other rules.

That arithmetic is useful only for understanding the change. It should not appear as a benefit in a new 2026 proposal. Get tax advice for prior-year projects or unusual facts.

The current Austin Energy rebate

Austin Energy's residential page lists a $4,000 rebate. The published requirements include:

• an Austin Energy residential account;
• a qualifying system at least 3 kW;
• installation by an Austin Energy participating contractor;
• program confirmation before installation;
• successful quality-assurance review.

The utility says the rebate is mailed as a check after quality assurance, generally within seven to ten business days. Confirm the current application documents and do not begin installation before required approval.

How Value of Solar works

Austin Energy uses a Value of Solar structure rather than a simple one-for-one retail net-metering promise. Its current page lists 9.91¢ per kWh for systems under 1 MW.

The utility credits all solar production at the applicable Value of Solar rate and charges all household consumption under the customer's electric rate. Any remaining solar credit carries forward, but the published terms say it is not transferable and has no cash value.

Model the actual tariff, customer usage, system production, degradation, financing, maintenance, and rate assumptions. Do not say exported electricity is worth “less than retail” without calculating the customer's current charges correctly.

Roof and site checks before pricing

Austin Energy's guidance says a good solar site typically has five to six hours of direct sun, roughly 200 to 400 square feet of available roof area, and a roof with at least ten years of remaining life.

That does not guarantee performance. A responsible proposal should document shading, orientation, roof planes, structural/roof condition, electrical service, inverter and equipment, production assumptions, warranties, interconnection, and removal/reinstallation responsibility if the roof later needs work.

Compare gross price before incentives

Ask each installer for:

• total cash price before rebates or credits;
• system DC size and equipment models;
• modeled first-year production and assumptions;
• degradation and warranty terms;
• financing principal, fees, rate, term, and total payments;
• Austin Energy rebate shown separately;
• Value of Solar model shown separately;
• roof, panel, permit, and interconnection work;
• cancellation and change-order terms.

Never compare one proposal's financed monthly payment with another proposal's cash price.

Efficiency before—or alongside—solar

Air leakage, damaged ducts, and inadequate insulation can inflate the load used to size solar. Diagnose those conditions and compare eligible Austin Energy efficiency measures before locking the system size. The best sequence depends on roof timing, equipment condition, budget, and household goals.

Where Completa fits

Completa can organize the scope and the gross real-time estimate while keeping rebates, financing, and projected utility value as visible assumptions. A matched local pro reviews field conditions and confirms or adjusts the project price before work begins. Austin Energy determines program eligibility, and the homeowner decides whether the verified economics meet the goal.