Tax Credits: Types, Phase-Outs, and How to Claim

Federal tax credits for individuals cut your tax bill dollar for dollar, and some can even generate a refund larger than what you paid in. The ones most people can use fall into a handful of groups: credits for raising children and supporting dependents, credits for low- and moderate-income workers, credits for tuition and training, credits for home energy improvements, and a short list of others covering retirement savings, health insurance, and adoption. Each has its own income limits, eligibility rules, and forms.

Refundable and Nonrefundable Credits

Every credit is one or the other, and the difference decides whether an unused portion is lost or paid out. A nonrefundable credit can take your tax bill down to zero but no further. Owe $800, qualify for a $1,000 nonrefundable credit, and the extra $200 disappears.¹

A refundable credit pays you the difference. Owe nothing, qualify for a $1,500 refundable credit, and the IRS sends you $1,500.² A few credits are partially refundable: part can trigger a refund, the rest only offsets tax. The Child Tax Credit and the American Opportunity Tax Credit are the two main examples.

Credits for Families and Workers

Child Tax Credit

The Child Tax Credit is worth up to $2,200 for each qualifying child under 17, with that base amount adjusting for inflation starting in 2026.³ You get the full amount if income stays at or below $200,000 (single) or $400,000 (joint). Above those lines, the credit drops $50 for every $1,000 of additional income.⁴

If your tax is too small to absorb the full credit, the Additional Child Tax Credit refunds part of what’s left. For the 2025 tax year, up to $1,700 per child was refundable, and that figure also inflates going forward.³ You need at least $2,500 of earned income to tap the refundable portion.⁴

The child needs a valid Social Security number issued by the return’s due date. A child with only an ITIN doesn’t qualify, though they may qualify for the Credit for Other Dependents.⁵ Both the regular and additional portions are calculated on Schedule 8812.⁶

Earned Income Tax Credit

The EITC is fully refundable and aimed at low-to-moderate-income workers. The amount depends on earnings, filing status, and the number of qualifying children. For the 2026 tax year, the maximum credits are:

No children: $664
One child: $4,427
Two children: $7,316
Three or more children: $8,231

The credit phases out as income rises. For single and head-of-household filers, it reaches zero at $19,540 (no children), $51,593 (one child), $58,629 (two children), and $62,974 (three or more). For joint filers the cutoffs are $26,820, $58,863, $65,899, and $70,224.⁷ Investment income over $12,200 (for 2026) disqualifies you entirely.

A qualifying child must pass four tests: age (under 19, under 24 if a full-time student, or any age if permanently disabled), relationship (your child, stepchild, sibling, or descendant of any of them), residency (lived with you in the United States for more than half the year), and joint return (the child didn’t file jointly with a spouse).⁸ Workers without qualifying children can still claim the smaller amount if they meet the income rules.

One practical note. If your return claims the EITC or the Additional Child Tax Credit, federal law requires the IRS to hold the entire refund until mid-February for fraud screening.⁹

Child and Dependent Care Credit

If you pay for care so you can work or look for work, this credit offsets part of the cost. It covers care for a child under 13, or a dependent of any age who can’t care for themselves. Eligible expenses are capped at $3,000 for one qualifying person or $6,000 for two or more.¹

The credit rate starts at 35% of eligible expenses and slides down to 20% once adjusted gross income exceeds $43,000. At 35% the maximum credit is $1,050 or $2,100; at 20% it’s $600 or $1,200. The credit is nonrefundable and goes on Schedule 3.¹⁰ Amounts you ran through an employer dependent care FSA come off the eligible-expense total before you calculate the credit.

Credits for Students and Tuition Payers

American Opportunity Tax Credit

The AOTC covers tuition, required fees, and course materials for the first four years of postsecondary education, up to $2,500 per student. The math: 100% of the first $2,000 in qualified expenses, plus 25% of the next $2,000.¹¹ Up to 40% ($1,000) is refundable.

The student has to be enrolled at least half-time for at least one academic period during the year and can’t have finished four years of postsecondary education before the tax year started.¹² The credit phases out between $80,000 and $90,000 of modified AGI for single filers, and between $160,000 and $180,000 for joint filers.¹³

Lifetime Learning Credit

The Lifetime Learning Credit is broader but smaller. It covers graduate school, professional courses, and even a single class taken to improve job skills, with no half-time rule and no cap on how many years you claim it.¹² It pays 20% of the first $10,000 of qualified expenses, maxing out at $2,000 per return (not per student).¹⁴

It’s entirely nonrefundable, and the 2026 phase-outs match the AOTC: $80,000–$90,000 for single filers, $160,000–$180,000 for joint filers.⁷ You can’t claim both education credits for the same student in the same year. For either one, the school must send Form 1098-T showing qualified tuition paid.¹⁵

Credits for Home Energy and Clean Energy

Energy Efficient Home Improvement Credit

Section 25C pays 30% of the cost of qualifying efficiency upgrades, subject to an overall $1,200 annual cap, plus a separate $2,000 annual cap for heat pumps, heat pump water heaters, and biomass stoves. Inside the $1,200 cap, specific items have their own limits:

Individual equipment items like central air conditioners and water heaters: $600 per item
Windows and skylights: $600 total
Exterior doors: $250 per door, $500 total
Home energy audits: $150

Covered improvements include insulation, exterior windows and doors, heat pumps, central air, water heaters, furnaces, and electrical panel upgrades when installed alongside other qualifying work.¹⁶ The cap resets every year.

Residential Clean Energy Credit

Section 25D pays 30% of the cost of solar panels, solar water heaters, small wind turbines, geothermal heat pumps, and battery storage installed at your home, with no annual dollar cap.¹⁷ Both energy credits are nonrefundable and reported on Form 5695, which carries over to Schedule 3. Hold onto manufacturer certification statements and itemized receipts.

One boundary. The federal clean vehicle credits under Section 30D and the previously owned clean vehicle credit are no longer available for vehicles acquired after September 30, 2025.¹⁸

Other Credits Worth Checking

Saver’s Credit. Contribute to an IRA or workplace retirement plan and you may qualify for a credit of up to 50% of your contributions, capped at $2,000 per person. The rate drops to 10% as income rises and then phases out. For 2026, the income limits are $40,250 (single), $60,375 (head of household), and $80,500 (joint).¹⁹
Premium Tax Credit. Buying health insurance through the ACA marketplace can qualify you for this credit, which helps cover monthly premiums. Eligibility generally runs from 100% to 400% of the federal poverty line, and the credit can be paid in advance directly to your insurer.²⁰
Adoption Credit. Qualified adoption expenses up to $17,670 for 2026, with up to $5,120 of that refundable.⁷

How Income Phase-Outs Work

Most credits don’t vanish the moment your income hits a threshold. They shrink by a fixed amount for each dollar of income over the line, until they reach zero. Thresholds vary by credit and filing status. Joint filers almost always get the highest cutoff; head-of-household filers usually sit between joint and single.

If your income swings year to year, or you’re parked near a threshold, the timing of a bonus, a Roth conversion, or a capital gain can decide whether you keep a credit or lose it.

How to Claim Credits on Your Return

Most nonrefundable credits (dependent care, education, energy, and the Saver’s Credit) go on Schedule 3, which feeds the Tax and Credits section of Form 1040.¹⁰ The Child Tax Credit and Additional Child Tax Credit use Schedule 8812.⁶ Refundable amounts show up in the Payments section of Form 1040, treated as if they were tax you’d already paid.

E-filing is the fastest route. The software flags common errors and reduces the back-and-forth that holds up paper returns. If you do file on paper, attach every required schedule. A missing Schedule 3 or Schedule 8812 can stall the whole return.

Records to Keep

Winning a credit on the return is half the job. Keeping the records that prove it is the other half. The specifics vary, but a few basics come up again and again:

Child-related credits: Social Security numbers for each qualifying child, plus records showing the child lived with you long enough.
Education credits: Form 1098-T from the school, plus receipts for course materials.¹⁵
Energy credits: manufacturer certification statements, itemized receipts, and contractor invoices.
Dependent care: the care provider’s name, address, and tax identification number, plus proof of amounts paid.

The IRS recommends keeping supporting documents for at least three years from the filing date.²¹

Fixing a Missed Credit

If you filed and later realized you left a credit on the table, file Form 1040-X to amend the return, attaching the corrected schedules and any forms the credit requires. Most amended returns can be filed electronically; returns from 2021 or earlier still have to go in on paper.²²

You generally have three years from the original filing date, or two years from the date you paid the tax, whichever is later. If you filed before the April deadline, the three-year clock runs from the deadline rather than your actual filing date. Miss the window and the credit is gone for good.²²

Penalties for Claiming a Credit You Shouldn’t

Honest mistakes that produce an underpayment can trigger the accuracy-related penalty: 20% of the underpaid amount. The IRS applies it when it finds negligence or careless disregard of the rules, which includes claiming a credit that looks too good to be true without checking eligibility.²³

For the EITC, Child Tax Credit, and AOTC, the consequences go further. If the IRS disallows one of these credits for reckless or intentional disregard of the rules, you’re barred from claiming that credit for two years. A fraudulent claim brings a ten-year ban. Once the ban is up, you have to file Form 8862 to show you’re eligible before the IRS will process the credit again. Form 8862 also applies if a prior disallowance (for reasons other than math errors) is behind you and you now qualify. It covers the EITC, CTC, Additional Child Tax Credit, Credit for Other Dependents, and AOTC.²⁴

1
Office of the Law Revision Counsel. 26 USC 21 – Expenses for Household and Dependent Care Services Necessary for Gainful Employment
2
Internal Revenue Service. Refundable Tax Credits
3
Office of the Law Revision Counsel. 26 USC 24 – Child Tax Credit
4
Internal Revenue Service. Child Tax Credit
5
Internal Revenue Service. Dependents
6
Internal Revenue Service. Instructions for Schedule 8812 (Form 1040)
7
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
8
Internal Revenue Service. Qualifying Child Rules
9
Internal Revenue Service. When to Expect Your Refund if You Claimed the Earned Income Tax Credit or Additional Child Tax Credit
10
Internal Revenue Service. Schedule 3 (Form 1040) – Additional Credits and Payments
11
Office of the Law Revision Counsel. 26 USC 25A – American Opportunity and Lifetime Learning Credits
12
Office of the Law Revision Counsel. 26 USC 25A – American Opportunity and Lifetime Learning Credits
13
Internal Revenue Service. American Opportunity Tax Credit
14
Internal Revenue Service. Lifetime Learning Credit
15
Internal Revenue Service. Instructions for Forms 1098-E and 1098-T
16
Office of the Law Revision Counsel. 26 USC 25C – Energy Efficient Home Improvement Credit
17
Office of the Law Revision Counsel. 26 USC 25D – Residential Clean Energy Credit
18
Internal Revenue Service. Clean Vehicle Tax Credits
19
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
20
Internal Revenue Service. Eligibility for the Premium Tax Credit
21
Internal Revenue Service. How Long Should I Keep Records?
22
Internal Revenue Service. File an Amended Return
23
Internal Revenue Service. Accuracy-Related Penalty
24
Internal Revenue Service. Instructions for Form 8862, Information To Claim Certain Credits After Disallowance