IRA Tax Credit Programs (25C, 25D, 45L)

Why this matters

The Inflation Reduction Act (IRA) 2022 expanded and extended federal tax credits for energy-efficient home improvements and renewable energy. Read the whole article in the past tense unless a section says otherwise: 25C and 25D both terminated for property placed in service after December 31, 2025. The examples below describe how the credits worked while they ran, which still matters for a customer carrying a claim forward or repricing a stale proposal, but do not quote them on new work without checking current federal status. Customers ask contractors about these credits; contractors who can accurately explain them close more sales. Knowing the credits also lets the contractor structure quotes to maximize customer benefit.

The three main credits

Section 25C: Energy Efficient Home Improvement Credit

For homeowners making efficiency improvements:

• 30 percent of qualifying costs
• Per-year caps by category
• Effective 2023 through 2025; terminated by the 2025 reconciliation act for property placed in service after December 31, 2025

Section 25D: Residential Clean Energy Credit

For homeowners installing renewable energy:

• 30 percent of qualifying costs
• No annual cap
• Effective 2022 through 2025; terminated by the 2025 reconciliation act for expenditures made after December 31, 2025, so the 2033 and 2034 step-downs never take effect

Section 45L: New Energy Efficient Home Credit

For builders / developers of new energy-efficient homes:

• Per-home tax credit
• Various amounts based on certification
• Effective 2023 through June 30, 2026; terminated by the 2025 reconciliation act for homes acquired after that date

Section 25C in detail

Eligible improvements

Total annual cap typically $3,200 ($1,200 + $2,000 separately).

These caps are set in IRC Section 25C as amended by the Inflation Reduction Act of 2022, and they govern property placed in service in tax years 2023 through 2025. The 2025 reconciliation act terminated Section 25C for expenditures made after December 31, 2025, so treat the table as the record for still-open tax years and confirm anything you tell a customer against the IRS Form 5695 instructions for the year actually being filed.

Qualifying products

For each category, specific efficiency requirements:

• Windows: ENERGY STAR Most Efficient typically
• Heat pumps: specific HSPF2 / SEER2 requirements (CEE Highest Tier typical)
• Insulation: specific R-values for the climate
• Doors: ENERGY STAR or higher

Manufacturer documentation typically indicates qualifying status.

Customer claims

• Customer keeps documentation
• Claims on IRS Form 5695
• Credit reduces tax owed (non-refundable)
• No carryforward. Unlike 25D, Section 25C has no provision to carry unused credit to a later year, so any amount above the customer's tax liability for that year is simply lost. This is the one that surprises people: a retiree with little tax liability gets far less than 30 percent back, and staging the work across two years does nothing about it if the liability is not there either year. Say this out loud before the customer signs on the strength of the credit.

Eligibility

• Primary residence (typically; some categories include second home)
• Existing home (not new construction)
• Customer is taxpayer
• Improvements made in the tax year claimed

Section 25D in detail

Eligible installations

No annual cap

• 30 percent of qualifying costs
• No dollar limit
• Customer can claim large installations

Phase-down

• 2022 through 2025: 30 percent, then terminated
• 2033: 26 percent
• 2034: 22 percent
• 2035 and later: expired

Customer claims

• IRS Form 5695
• Documentation includes:
  • Cost of system
  • Date placed in service
  • Manufacturer certifications

Eligibility

• Primary or second residence
• Must be installed in the home
• Customer owns the system (not leasing typically)
• New (not used) systems
• Located in the United States

Section 45L in detail

Eligible

For builders / developers:

• Single-family or multi-family new construction
• Specific efficiency certifications

Amounts

The multi-family rows above are the base amounts. A multi-family project that meets the prevailing-wage requirements earns the single-family amounts per unit instead, which is a five-fold jump and the reason wage compliance gets decided at the front of a project rather than at tax time.

These amounts are set in IRC Section 45L as amended by the Inflation Reduction Act of 2022, and apply to homes acquired through June 30, 2026, after which the 2025 reconciliation act terminates the credit. Confirm against the IRS Form 8908 instructions for the tax year being filed.

Eligibility

• Manufactured home, single-family, multi-family
• Built / developed in the tax year claimed
• Certified per the standard
• Customer sells or leases

Claims

• IRS Form 8908
• Builder / developer claims
• Customer (homeowner) doesn't claim

Examples

Customer installing solar PV

• 25D credit: 30 percent of the installed system cost, no annual cap
• Customer claims on Form 5695

Customer installing heat pump + air sealing + windows

• Heat pump: credit caps at $2,000
• Air sealing: counts toward the $1,200 building-envelope sub-cap
• Windows: credit caps at $600
• Total annual credit: caps at $3,200 (combining the $2,000 heat-pump line and the $1,200 envelope line)
• Future years can claim more (the caps are annual, not lifetime)

Customer installing geothermal

• 25D credit: 30 percent of the installed system cost, no annual cap
• Larger benefit than air-source heat pump (25C cap)

Contractor's role

Educate, don't advise on taxes

• Provide information about available credits
• Don't promise specific tax outcomes
• Customer should consult tax professional

Provide documentation

• Manufacturer specifications
• Cost details
• Installation date
• Product certifications

Suggest credit-maximizing approach

• Bundle work for the year's cap
• Stage major work across years (multiple year caps)
• Recommend specific products that qualify

Don't overpromise

• Each taxpayer's situation varies
• Tax credit may not fully apply
• Future tax law changes possible

Documentation customer needs

For each tax credit claim:

For Section 25C

• Manufacturer's certification statement
• Invoice with cost breakdown
• Installation date
• Specific product specifications

For Section 25D

• Same as above plus:
• System sizing documentation
• Battery capacity (if applicable)
• Net metering documentation (PV)

For Section 45L

• Builder's documentation
• Specific efficiency certification
• Customer (homeowner) doesn't have to file

State and local credits

In addition to federal:

State tax credits

• Vary by state
• Some states have additional energy credits
• Some have sales tax exemption

Utility rebates

• Specific to utility
• Vary widely
• Customer applies through utility

Local incentives

• Some cities / counties offer
• Specific to area

The contractor should know what's available locally.

Income limitations

Section 25C

• No income limit
• Available to all taxpayers

Section 25D

• No income limit

Some state programs

• May have income limits
• Specific to each program

Refundability

Non-refundable

• Most federal credits (including 25C and 25D)
• Can reduce tax to zero; can't generate refund
• 25D excess carries forward to the following year. 25C excess does not carry forward and is lost.

Refundable

• Specific programs (some EV credits)
• Customer's refund

The customer's tax situation matters.

Documentation customer keeps

For each year claimed:

Records

• All invoices and receipts
• Manufacturer certifications
• Photos of installation
• Energy assessment (if applicable)

Retention period

Tell the customer to keep the file, and keep your own copy longer than they will.

Customer, at minimum three years from the filing date of the return the credit was claimed on. That is the ordinary IRS assessment window, and it is the answer for a simple 25C claim with no carryforward.

Customer, six years where the return could be reopened for a substantial understatement of income. Cheap insurance on a large claim.

Customer, indefinitely, when there is a carryforward. This is a 25D situation, not a 25C one, since 25C has no carryforward. Credits carried to later years keep the original documentation relevant, because the year the credit was earned can still be examined when the carryforward is used. Keep the file until the last dollar of credit has been used and that year's own window has closed.

Customer, for the life of the property, on 25D installations. Solar, geothermal, battery storage, and similar improvements add to the basis of the home. The invoices matter again at sale, and on a system with a long life that can be decades out. Keep them with the closing documents, not in a shoebox with the receipts.

Contractor, keep your own set. Copies of the invoice showing labor and materials broken out, the manufacturer certification statement, model and serial numbers, the qualified manufacturer product identification number where the program requires it, permit and inspection records, and the photos. Customers lose paperwork and call you years later; being able to reproduce it makes you the hero and costs you nothing but disk space. For 45L work, retain the certification and the eligible certifier's report on the same schedule, because the builder's claim depends on your file.

Store it digitally. Thermal-paper receipts fade to blank inside a few years, which is well inside every window above. Scan at the time of the job.

You explain the retention rule. The customer's tax preparer decides what gets filed and when.

References

• Internal Revenue Code Sections 25C, 25D, 45L.
• IRS Form 5695 (Residential Energy Credits).
• IRS Form 8908 (Builder's Energy Efficient New Home Credit).
• IRA 2022 amendments to these sections.
• ENERGY STAR certification database.
• CEE (Consortium for Energy Efficiency) qualifying products.
• Manuall internal: QuickBooks Setup for Service Business.