What an investment tax credit actually does

An investment tax credit is a dollar-for-dollar reduction in the federal income tax you owe when you buy certain property or equipment for a business or rental property. If you owe $5,000 in tax and you have a $2,000 investment credit, you pay $3,000 instead. The credit does not reduce your taxable income — it reduces the tax bill itself, which makes it more valuable than a deduction of the same size.

The most common investment credit is the Investment Tax Credit (ITC), which applies mainly to solar energy systems, wind property, and some other renewable energy equipment. A separate credit, the Rehabilitation Credit, covers costs to restore historic buildings. Both are federal credits administered by the IRS, and both have specific rules about what property qualifies and who can claim them.

Investment credits are not the same as tax deductions. A deduction reduces the income you report; a credit reduces the tax you owe. A credit is worth more because it applies after your tax is calculated. You do not need to itemize to claim an investment credit, and the credit can sometimes carry forward to future years if you cannot use all of it in the year you earned it.

Key Takeaways

  • Investment credits reduce your federal tax bill dollar-for-dollar, not your taxable income, which makes them more valuable than deductions of the same amount.
  • The Investment Tax Credit covers solar panels, wind turbines, and certain other renewable energy property placed in service after specific dates.
  • The Rehabilitation Credit applies to may have access to expenses for restoring historic buildings and has different rules about what work counts.
  • You must own the property or equipment and place it in service during the tax year you claim the credit; rental properties and business equipment both may have access to.
  • Unused credits can carry forward to future tax years, but some credits have limits on how long they can be carried or how much income can be offset.

The Investment Tax Credit for renewable energy

The Investment Tax Credit (ITC) for solar and wind is the most widely used investment credit. It covers 30 percent of the cost of may have access to solar photovoltaic systems, solar water heaters, small wind turbines, geothermal heat pumps, and some battery storage systems. The percentage was 30 percent for systems placed in service through 2032, then steps down in later years — this schedule is set by federal law and can change if Congress acts.

To claim the ITC, you must own the property outright or through a partnership, S corporation, or C corporation. If you lease solar panels from a third party, you cannot claim the credit — the company that owns the panels claims it instead. The property must be placed in service (meaning installed and ready to use) during the tax year you claim the credit. You cannot claim the credit in the year you buy the equipment if it is not yet installed.

The credit applies to the full cost of the system, including labor, wiring, and installation. It does not apply to the cost of land or to property used outside the United States. If you use the property partly for business and partly for personal use, you can claim the credit only on the business portion.

The Rehabilitation Credit for historic buildings

The Rehabilitation Credit covers 20 percent of may have access to expenses to restore a historic building. A historic building is one listed on the National Register of Historic Places, or one that is part of a historic district and certified as historic by the appropriate state or local authority. The building must have been placed in service before 1936, or it must be a certified historic structure.

may have access to expenses include the cost of restoring the building's exterior and interior to meet the Secretary of the Interior Standards for Historic Preservation. Work that does not meet those standards — such as replacing original windows with modern ones, or removing historic details — does not count. Routine maintenance, repairs that do not change the building's character, and new construction do not may have access to.

You must own the building and hold it for at least five years after the work is done to keep the credit. If you sell the building before five years pass, you may have to recapture (repay) part or all of the credit. The credit is claimed on Form 3468 and requires certification from the National Park Service that the work meets the standards.

Income limits and credit carryforward

The Investment Tax Credit for renewable energy has no income limit — anyone who owns may have access to property can claim it, regardless of how much they earn. The Rehabilitation Credit also has no income limit, but it is subject to passive activity loss rules if you are not a real estate professional, which can limit how much credit you can use in a given year.

If your credit is larger than your tax liability in the year you earn it, you can carry the unused portion forward to future years. For the renewable energy ITC, unused credits can be carried forward indefinitely — there is no time limit. For the Rehabilitation Credit, unused credits can be carried back one year and forward 20 years.

Some credits are subject to the Alternative Minimum Tax (AMT), which can reduce or eliminate the benefit in certain situations. The renewable energy ITC is not subject to AMT, but the Rehabilitation Credit is. If you are subject to AMT, you may not be able to use the full credit in the year you earn it.

How to claim an investment credit on your tax return

To claim the Investment Tax Credit for renewable energy, you file Form 3468 (Investment Credit) with your federal tax return. You will need documentation showing the cost of the system, the date it was placed in service, proof that it qualifies (such as a certification from the installer), and your ownership interest in the property.

For the Rehabilitation Credit, you also file Form 3468, but you must first obtain a information Letter from the National Park Service confirming that the work meets the Secretary of the Interior Standards. This letter is issued before or after the work is done, depending on whether you request a preliminary review. Without this letter, the IRS will not allow the credit.

If you own the property through a partnership, S corporation, or other pass-through entity, the credit flows through to your personal return on Schedule K-1. You then claim your share of the credit on Form 3468. If you own it directly, you claim the full credit on your own return.

What happens if you sell the property

If you claim the Rehabilitation Credit and then sell the building within five years, you must recapture the credit. Recapture means you add back a portion of the credit you claimed to your taxable income in the year of sale. The recapture percentage depends on how long you held the property: if you held it less than one year, you recapture 100 percent; if you held it one to two years, you recapture 80 percent; and so on, down to zero recapture if you held it five years or more.

The renewable energy ITC does not have a recapture rule, so you keep the credit even if you sell the property the next year. However, if you claimed the credit and then remove the equipment before the end of the tax year, you may have to adjust your credit claim.

If you sell a property that has a solar system or other equipment for which you claimed the ITC, the credit stays with you — it does not transfer to the buyer. The buyer cannot claim a new credit on the same equipment.

State and local investment credits

Many states offer their own investment credits for renewable energy, energy efficiency, or historic preservation. These state credits work similarly to the federal credits but have different percentages, different may have access to property, and different rules. Some states allow you to claim both the federal credit and the state credit on the same property; others do not.

You claim state credits on your state tax return, not your federal return. The rules vary widely by state, so you should check with your state tax authority or a tax professional to learn what credits are available where you live and whether they can be combined with the federal credit.

Frequently Asked Questions

Can I claim the investment credit if I rent out the property?

Yes. Rental properties may have access to for both the renewable energy ITC and the Rehabilitation Credit. You must own the property and place the equipment or restoration work in service during the tax year you claim the credit. The credit reduces your federal tax liability, just as it would for a business property.

What if I buy a used solar system or wind turbine?

The renewable energy ITC applies only to new equipment placed in service for the first time. Used equipment does not may have access to. The equipment must be new when you install it, even if you buy it from a retailer's inventory.

Can I claim the credit if I financed the equipment with a loan?

Yes. The credit is based on the cost of the equipment, not on how you paid for it. Whether you paid cash, took out a loan, or used a lease does not change the credit amount. However, if you lease the equipment from someone else, you cannot claim the credit — only the owner can.

What if my credit is bigger than my tax bill?

For the renewable energy ITC, you can carry the unused credit forward to future years with no time limit. For the Rehabilitation Credit, you can carry it back one year and forward 20 years. You cannot get a refund of the unused credit, but you can use it to offset tax in other years.

Do I need a tax professional to claim the credit?

The forms are complex, especially for the Rehabilitation Credit, which requires a information Letter from the National Park Service. Many people work with a tax professional or CPA to ensure the credit is claimed correctly and to understand how it interacts with other tax rules that may apply to their situation.