What a tax credit does

A tax credit is a dollar-for-dollar reduction in the federal income tax you owe. If you owe $2,000 in taxes and you have a $500 credit, you pay $1,500 instead. This is different from a deduction, which reduces the income the IRS counts — a $500 deduction might lower your tax bill by $100 or $150 depending on your tax bracket, but a $500 credit always lowers it by exactly $500.

The IRS offers dozens of credits for different situations: having children, paying for education, installing solar panels, working at a low income, or caring for dependents. You claim them on your tax return, and the IRS subtracts them from what you owe. Some credits can even give you money back if they are larger than your tax bill — these are called refundable credits.

Key Takeaways

  • A tax credit subtracts directly from your tax bill dollar-for-dollar, while a deduction only reduces the income the IRS counts.
  • Refundable credits can return money to you if the credit is larger than what you owe, while non-refundable credits can only reduce your bill to zero.
  • The Child Tax Credit, Earned Income Tax Credit, and American Opportunity Credit are the three most common credits for individual filers.
  • You claim credits on your tax return using specific forms and schedules, and the IRS verifies your income and situation before allowing them.
  • Some credits phase out as your income rises, meaning you get less of the credit or none at all if you earn above a certain threshold.

Refundable versus non-refundable credits

A refundable credit can return money to you even if you owe zero in taxes. The most common example is the Earned Income Tax Credit (EITC), which is designed to help low-income workers. If you earn $20,000 and owe $500 in taxes, and you have a $1,200 EITC, the IRS will subtract the $500 you owe and send you a check for $700. The credit is "refundable" because it goes beyond just zeroing out your bill.

A non-refundable credit can only reduce your tax bill to zero — it cannot send you money back. The American Opportunity Credit, which helps pay for college, is non-refundable (though it has a partially refundable component). If you owe $1,000 and you have a $2,000 non-refundable credit, the credit wipes out your $1,000 bill, but you do not receive the extra $1,000. The unused portion is lost.

Understanding which type you have matters because it changes how much money you actually get back. The IRS instructions for each credit will tell you whether it is refundable or non-refundable.

The three most common credits

The Child Tax Credit gives you up to $2,000 per child under age 17 if your income is below certain thresholds. It is partially refundable, meaning you can get back up to $1,700 per child even if you owe no taxes. You claim it on Schedule 8812 of your tax return. The credit phases out as your income rises — for 2024, it begins to reduce if you earn over $400,000 (married filing jointly) or $200,000 (single).

The Earned Income Tax Credit (EITC) is a refundable credit for workers with low to moderate income. The amount depends on your income, filing status, and whether you have children. A single parent with one child might receive up to $3,733, while a single filer with no children might receive up to $645. You claim it on Schedule EIC. The EITC is fully refundable, so you can receive the full amount even if you owe nothing.

The American Opportunity Credit helps pay for college tuition and related expenses. You can claim up to $2,500 per student per year for the first four years of college. It is partially refundable — up to $1,000 can be refunded to you. You claim it on Form 8863. The credit phases out if your income exceeds $80,000 (single) or $160,000 (married filing jointly).

How income limits and phase-outs work

Many credits shrink or disappear as your income rises. This is called a phase-out. The IRS sets an income threshold for each credit, and once you earn above that amount, the credit begins to reduce by a set percentage for each additional dollar you earn.

For example, the Child Tax Credit begins to phase out at $400,000 of income (married filing jointly). For every $1,000 you earn above that, the credit reduces by $50. If you earn $410,000, your credit is $500 less than the full amount. If you earn high enough, the credit disappears entirely.

The income limits vary by credit and change slightly each year for inflation. When you file your taxes, you will calculate your modified adjusted gross income (MAGI) — a number the IRS defines differently for each credit — and compare it to the phase-out threshold. The tax software you use or a tax preparer will do this calculation for you, but understanding that phase-outs exist helps explain why two people with the same credit might receive different amounts.

How to claim a credit on your tax return

You claim credits by filling out the correct form or schedule and attaching it to your main tax return (Form 1040). Each credit has its own form: the Child Tax Credit uses Schedule 8812, the EITC uses Schedule EIC, the American Opportunity Credit uses Form 8863, and so on. The form asks you for information about your situation — your children's names and Social Security numbers, the college you attended, the amount you spent on childcare — and calculates how much credit you are may have access to to.

You then transfer the credit amount to the main line on Form 1040 where credits are totaled. The IRS subtracts this from your total tax liability. If you use tax software like TurboTax, H&R Block, or TaxAct, the software will ask you questions about your situation and automatically fill in the correct forms and schedules. If you file by hand or work with a tax preparer, they will handle this step.

The IRS verifies credits by checking your income against IRS records, confirming that dependents exist and are yours, and reviewing the expenses you claim. If something does not match, the IRS may reduce or deny the credit and send you a notice. Keep receipts and documentation for at least three years in case the IRS asks questions.

Credits that require specific documentation

Some credits demand proof of what you spent. The American Opportunity Credit requires you to have a Form 1098-T from your school showing tuition and fees paid. The Child and Dependent Care Credit requires receipts or invoices from the daycare provider. The Residential Energy Credits (for solar panels or energy-efficient upgrades) require invoices from the contractor and sometimes certification that the product meets federal standards.

Other credits rely on information already in the IRS system. The EITC requires only your income and filing status — the IRS has your W-2 forms from your employer. The Child Tax Credit requires your children's Social Security numbers, which you provide on your return, and the IRS cross-checks them against Social Security Administration records.

Before you claim a credit, read the IRS instructions for that specific credit to learn what documentation you need. The IRS website has free publications for each major credit that explain what counts as a may have access to expense and what proof you must keep.

What happens if you claim a credit you are not may have access to to

If you claim a credit and the IRS determines you did not meet the requirements, the agency will send you a notice explaining the problem. The most common issues are claiming a child who is too old, claiming a dependent who is not your biological child or legal dependent, or having income above the phase-out threshold. The IRS will reduce or deny the credit and calculate how much additional tax you owe, plus interest.

If the error was honest — you misunderstood the rules or made a math mistake — you can respond to the IRS notice with documentation showing you were may have access to to the credit, or you can accept the adjustment and pay what you owe. If the IRS believes you intentionally claimed a credit you knew you were not may have access to to, it may assess penalties on top of the tax and interest owed.

This is why it is important to understand the rules for each credit before you claim it. The IRS instructions and free publications explain the requirements clearly, and tax software will ask you questions to confirm you meet them.

Frequently Asked Questions

Can I claim more than one credit on the same tax return?

Yes. Most people claim multiple credits. You might claim the Child Tax Credit for your children, the American Opportunity Credit for college expenses, and the Earned Income Tax Credit all on the same return. The IRS adds up all your credits and subtracts the total from your tax bill. Some credits have rules about whether they can be combined — for example, you cannot claim both the American Opportunity Credit and the Lifetime Learning Credit for the same student in the same year — but the tax software will prevent you from making that mistake.

What if my credit is larger than the tax I owe?

If the credit is refundable, you receive the difference as a refund. If it is non-refundable, the unused portion is lost. For example, if you owe $1,000 and have a $1,500 refundable credit, you get a $500 refund. If you have a $1,500 non-refundable credit, your bill goes to zero and the extra $500 disappears. This is why refundable credits are more valuable — they can return money to you.

Do I have to itemize deductions to claim a credit?

No. Credits are separate from deductions. You can claim credits whether you take the standard deduction or itemize. In fact, most people take the standard deduction and still claim multiple credits. The two are independent — claiming one does not affect your ability to claim the other.

What if my income changes after I file?

If you received an advance payment of a credit (like the advance Child Tax Credit payments the IRS sent in 2021) and your income changed, you may owe some of it back when you file your next return. If you claimed a credit based on estimated income and your actual income was different, the IRS will adjust the credit when it processes your return. You cannot change a filed return yourself, but you can file an amended return (Form 1040-X) if you made a mistake or if your situation changed before the filing important date.

Where can I learn the specific rules for a credit I think I may have access to for?

The IRS website (irs.gov) has free publications for each major credit that explain the requirements, income limits, and documentation needed. You can also call the IRS at 1-800-829-1040 to ask about a specific credit. Tax software will ask you questions about your situation and tell you which credits you may be may have access to to based on your answers. A tax preparer or CPA can also review your situation and identify credits you might have missed.