Tax Credit Calculator

Tax Credit Calculator: Estimate Your Federal Credits and Refund

A tax credit calculator estimates how much money you can subtract from your tax bill, or receive as cash, using credits such as the earned income credit, the child tax credit, and education credits. This free tool covers 12 credit modules for tax years 2025 and 2026. It scores each credit as Likely, Possible, or Not eligible, and it adds up your total. It also estimates your refund.

Workers, parents, students, homeowners, and small business owners should use it. It matters because credits cut tax dollar for dollar. Many are refundable, so they pay you even when you owe no tax.

What Is a Tax Credit?

A tax credit is a dollar-for-dollar reduction of the tax you owe. A $1,000 credit lowers your bill by $1,000. It works after your tax is calculated.

A deduction works earlier. It lowers your taxable income, not your tax. A $1,000 deduction saves $220 for someone in the 22% bracket. The same amount as a credit saves the full $1,000.

Credits fall into two groups. Refundable credits pay you the leftover amount when the credit exceeds your tax. Non-refundable credits stop at zero tax. Any unused part is lost, unless the rules allow a carryforward.

Your bracket sets how much a deduction is worth. Use our tax bracket calculator to see your bracket, then use the income tax calculator to see the tax the credits reduce.

What Does This Tax Credit Calculator Do?

The calculator works as a credit checker, credit estimator, and eligibility calculator in one page. It has 12 cards. Each card handles one credit or one question.

The cards share data. Results from cards 2, 3, 4, 5, 6, 7, 8, and 10 flow into the estimator on card 12. Fields fill automatically and show an “Auto-filled” badge.

How to Use the Tax Credit Calculator

1. Start with card 1. Enter your year, filing status, age, wages, and family details.
2. Press Calculate. You get a Likely, Possible, or Not eligible label for each credit.
3. Open the card for any credit that shows a value. Enter exact figures from your tax records.
4. Use Fill Example to see a sample case. Use Reset to clear a card.
5. Finish on card 12. It combines everything into one refund or balance-due estimate.

Each card draws a chart. Use the plus and minus buttons to zoom. Open “Formula and method” under each result to see the math.

Calculator Inputs Explained

Most cards ask for the same core facts. Getting these right matters more than any other step.

Filing Status and Tax Year

Filing status sets your brackets, standard deduction, and income limits. The choices are Single, Married Filing Jointly, Head of Household, Qualifying Surviving Spouse, and Married Filing Separately.

The tax year selector offers 2025 (filing now) and 2026 (planning). Returns for 2025 use the 2025 tables. Extended 2025 returns are generally due October 15, 2026.

Income Terms: Earned Income, AGI, and MAGI

Earned income is pay from working. It includes wages, tips, and net self-employment profit. Adjusted gross income (AGI) is total income minus certain adjustments. Modified AGI (MAGI) adds a few items back to AGI for credit rules.

Not sure of your AGI? Run our adjusted gross income calculator first. Not sure of annual pay? Check the annual income calculator.

Children and Dependents

The calculator asks for three counts:

• Children under 17 qualify for the full child tax credit.
• Other dependents (age 17 and older) qualify for a smaller $500 credit.
• Children under 13 can qualify for the dependent care credit.

Every child needs a valid Social Security number (SSN) to qualify for the child tax credit.

How to Read Your Results

Each card returns headline numbers, a plain-language note, and a chart.

• Likely means your inputs pass every test the calculator checks. Only Likely credits enter the total.
• Possible means you may qualify, but the exact amount needs another card. Premium Tax Credit uses this label.
• Not eligible means a test failed. The card names the failed test, such as “Investment income is above the $12,200 limit.”
• Refundable part is cash you can receive even with zero tax owed.
• Distance to EITC cutoff shows how many extra dollars you can earn before the credit reaches $0.

Earned Income Tax Credit (EITC): The Biggest Credit for Workers

The earned income tax credit is a refundable credit for people with low to moderate work income. Searchers use many names for it: earned income credit, EIC, EITC, and earned income tax credit. All mean the same credit.

How the EITC Formula Works

The credit has three zones:

1. Phase-in: The credit grows with each dollar earned. Rates are 7.65% (no children), 34% (one child), 40% (two children), and 45% (three or more).
2. Plateau: The credit stays at its maximum.
3. Phase-out: The credit shrinks. Rates are 7.65%, 15.98%, and 21.06%.

The formula is: Credit = the smaller of the phase-in amount and the phase-out amount. The calculator uses smooth formulas. IRS tables round income into $50 bands, so results can differ by a few dollars.

2026 EITC Limits Used by the Calculator

The 2025 maximums for the same groups are $649, $4,328, $7,152, and $8,046.

EITC Credit by Income (Single Filer, 2026)

The table shows the credit at seven income levels. It comes from the calculator’s own formulas.

The Hidden Tax Inside the Phase-Out

Extra pay costs credit inside the phase-out zone. A single parent with two children who earns $24,000 gets $7,293. At $25,000 the credit falls by $211. At $45,000, another $1,000 of pay cuts the credit by $210.

This is why the EITC card shows an “Effect of $1,000 more pay” result. Check it before you accept overtime or a side job.

Who Cannot Claim the EITC

Four rules block the credit in the calculator:

• Married Filing Separately is generally not eligible.
• Investment income above $12,200 (2026) disqualifies you.
• With no children, you must be 25 to 64. A 22-year-old worker with no children gets $0.
• With no earned income, no credit exists.

Self-employed workers can claim the credit. Enter net profit as earned income. Older adults without children lose eligibility at 65, so the age check matters for retirees who still work.

State EITC

The card includes a “State EITC as % of federal” field. A 30% state match on $7,293 adds $2,188. Some states use their own formulas, so confirm yours with your state tax agency.

Child Tax Credit (CTC, ACTC, and ODC)

The child tax credit is $2,200 per qualifying child under 17 for 2026. The calculator applies a $500 credit for other dependents (ODC).

Formula and Phase-Out

• Gross credit = $2,200 × children + $500 × other dependents.
• Phase-out removes $50 for every $1,000 of MAGI above $200,000 ($400,000 joint).
• Non-refundable part = the smaller of the credit and your tax.
• Refundable part (ACTC) = the smaller of the leftover credit, $1,700 per child, and 15% of earnings above $2,500.

Example: Family With Low Tax

A married couple has two children and earns $32,000. Tax before credits is $1,660.

1. Gross credit is $4,400.
2. The credit cancels the $1,660 tax.
3. The refundable part is $2,740, limited by $1,700 per child and the 15% earnings rule.

The couple receives $2,740 in cash. Filing status Head of Household with one child and $20,000 of income, and no tax owed, receives $1,700.

A single parent with two children and $250,000 of income loses $2,500. The credit drops from $4,400 to $1,900.

Child and Dependent Care Credit vs. Dependent Care FSA

The child and dependent care credit (CDCTC) reimburses a share of care costs so you can work. Expenses cap at $3,000 for one qualifying person and $6,000 for two or more. The lower earner’s income also caps them.

The rate falls as AGI rises. The calculator models a top rate of 50% for 2026 and a 2025 top rate of 35%. It flags the 2026 rate for checking against the Form 2441 instructions.

Example: Couple Choosing Between the Two

A married couple earns $60,000 and $40,000. They pay $9,000 for care for two children. They sit in the 22% bracket. Their 2026 credit rate is 35%.

• Credit alone: $6,000 × 35% = $2,100.
• FSA alone: $7,500 × (22% + 7.65%) = $2,224.
• Mix of $5,000 FSA plus credit: $1,483 + $350 = $1,833.

The FSA wins here. The mix loses because FSA dollars use up the $6,000 expense cap.

Education Credits: AOTC and Lifetime Learning

The American Opportunity Tax Credit (AOTC) gives up to $2,500 per student for the first four years of college. It equals 100% of the first $2,000 of costs plus 25% of the next $2,000. Forty percent, up to $1,000, is refundable.

The Lifetime Learning Credit (LLC) equals 20% of up to $10,000 of costs. It has no year limit. You cannot claim both credits for the same student.

Phase-out runs from $80,000 to $90,000 of MAGI ($160,000 to $180,000 joint). Married Filing Separately cannot claim either credit.

Example: Full-Time Student

A student pays $12,000 tuition and $800 for books. Tax-free aid is $3,000. MAGI is $70,000.

• Qualified expenses: $12,000 + $800 − $3,000 = $9,800.
• AOTC: $2,500, with $1,000 refundable.
• LLC alternative: 20% × $9,000 = $1,800.

The calculator picks the AOTC. At $85,000 of single MAGI, the AOTC drops to $1,250.

Premium Tax Credit (ACA)

The premium tax credit lowers monthly health insurance premiums bought on the Marketplace. People also call it the ACA tax credit or Obamacare tax credit. Advance payments are called APTC.

The credit equals the benchmark plan cost (the second-lowest-cost silver plan, or SLCSP) minus your expected contribution. Income compared with the federal poverty line (FPL) sets that contribution.

2025 vs. 2026

The calculator uses a 2026 contribution range of 2.10% to 9.96% of income. It applies no credit above 400% of the poverty line. The 2025 model uses 0% to 8.5% with no cliff.

Warning: Congress may change these rules. Check current law before you rely on a 2026 figure.

Example: Family of Four

The family has a MAGI of $70,000 and a poverty line of $32,150. That equals 218% of the line. Their benchmark premium is $1,400 per month. They pay $1,250 for their plan and received $400 per month in advance credits.

• Expected contribution: 7.25% of income, about $423 per month.
• Credit: $827 per month, or $9,923 per year.
• Net after advances: $9,923 − $4,800 = a $5,123 refund.

The same family in 2025 would earn $12,918. Rule changes cost them $2,995.

The cliff is severe. At $128,600 of income this family still gets $2,191. At $129,600 it gets $0.

Analyst note: Pre-tax retirement or HSA contributions lower MAGI. They can keep income under the cliff.

Saver’s Credit

The Saver’s Credit rewards low- and middle-income savers with a credit of 10%, 20%, or 50% of contributions. Contributions count up to $2,000 per person. The credit is non-refundable.

A married couple with $45,000 of AGI contributes $2,000 and $1,500. They earn 50% of $3,500, or $1,750. A single filer at $45,000 gets $0.

The calculator states that a federal match replaces this credit from 2027. Tax year 2026 is the last year to claim it as a credit. Use the Roth IRA calculator, the 401(k) calculator, or the retirement calculator to plan contributions.

Home and Energy Credits

The home module handles four items: the residential clean energy credit (25D, solar), the energy-efficient improvement credit (25C), the Mortgage Credit Certificate (MCC), and repayment of the 2008 homebuyer credit.

The calculator treats 25D as a 30% credit for 2022 through 2025. It shows expenses after December 31, 2025 as ended. Excess credit carries forward.

Example: $24,000 of solar costs in 2025 creates a $7,200 credit. With $5,000 of tax, you use $5,000 now and carry $2,200 forward.

An MCC equals your rate times mortgage interest. It caps at $2,000 when the rate is above 20%. The 2008 credit repays at 1/15 per year. See the solar panel calculator for payback, and the mortgage calculator or home mortgage calculator for interest costs.

Charitable Donations: A Deduction, Not a Credit

Users search for “donation tax credit calculator.” In the U.S., gifts create a deduction, not a credit. The card is included because the intent is so common.

For 2026, non-itemizers deduct up to $1,000 ($2,000 joint) of cash gifts. Itemizers deduct gifts above 0.5% of AGI. Cash limits reach 60% of AGI. Appreciated stock reaches 30%.

Example: Stock vs. Cash

A single filer has $120,000 AGI and sits in the 24% bracket. She gives $5,000 cash and $10,000 of stock bought for $3,000. Other itemized deductions are $14,000.

• Itemizing saves $2,952 of tax.
• Gain avoided on the stock: $7,000 × 15% = $1,050.
• Net cost of giving: $15,000 − $2,952 − $1,050 = $10,998.

Giving stock avoids the gain entirely. Canada’s donation credit is different and is not modeled here.

Business Credits: Research and Development

The R&D credit rewards spending on qualified research. Qualified research expenses (QREs) equal wages times time spent, plus supplies, plus 65% of contract research.

Two methods exist. The Regular method gives 20% of spending above a base. The Simplified method (ASC) gives 14% of spending above half your three-year average.

Example

A firm has $600,000 in wages, $20,000 in supplies, and $50,000 in contract research. QREs equal $652,500. Prior-year gross receipts are $5 million. Average QREs are $300,000.

• Regular: $65,250.
• ASC: $70,350.
• After the Section 280C reduction (× 79%): about $55,577.

Eligible startups can apply up to $500,000 against payroll tax. Keep time logs and project records, because documentation supports the claim.

The employee retention credit (ERC or ERTC) is not modeled. That credit belongs to earlier tax years.

International Credits: Canada, Australia, New Zealand

Card 11 handles dividend credits. Canada uses a gross-up plus a credit. Australia uses franking credits. New Zealand uses imputation credits.

An Australian investor receives an $8,000 fully franked dividend and pays 32% tax.

• Credit: $3,429. Grossed-up income: $11,429.
• Tax before credit: $3,657.
• Net tax: $229, or 2.9% of the cash dividend.

A Canadian eligible dividend of $5,000 grosses up to $6,900. It earns a federal credit of $1,036. Provincial credits are not modeled. Use the dividend tax calculator for U.S. dividend taxes.

Estimate Your Full Refund

Card 12 turns all credits into one answer. It takes AGI, deductions, withholding, and credits. It then applies your 2025 or 2026 brackets.

Formula: Refund = withholding + estimates + refundable credits − (tax − non-refundable credits + other taxes).

Example: Married Couple

The couple earns $60,000 and withholds $5,000. They claim $2,200 of non-refundable credits and $1,700 of refundable credits.

1. Taxable income: $60,000 − $32,200 = $27,800.
2. Tax: $2,840.
3. Credits applied: $2,200. Net tax: $640.
4. Refund: $5,000 + $1,700 − $640 = $6,060.

The card also shows a withholding change per paycheck. Here it is $233 per biweekly period. A large refund means you lent the government money. Adjust your W-4 to keep more in each paycheck. Use the paycheck calculator or the gross to net calculator to see take-home pay.

Three Scenarios Step by Step

Scenario 1: Single Parent, Two Children

Head of Household, $24,000 of wages, no investment income, 2026.

1. EITC: $7,293.
2. Taxable income: $24,000 − $24,150 = $0. Tax is $0.
3. Child tax credit: nothing offsets tax. The refundable part is 15% × ($24,000 − $2,500) = $3,225.
4. Total cash: $10,518.

A dependent care credit would add $0 here because the credit is non-refundable and no tax exists.

Scenario 2: Middle-Income Family With Childcare

Use the couple from the care example. The best route is the FSA at $2,224, not the credit alone at $2,100. The mix loses at $1,833. The calculator shows all three figures.

Scenario 3: Marketplace Family Near the Cliff

Use the family of four. Every dollar over $128,600 costs the full $2,191 credit. That is a 219,100% marginal loss on one dollar. Plan MAGI carefully.

Credit vs. Deduction vs. Rebate

Manual vs. Calculator vs. Tax Software

Search Demand Snapshot

Google Keyword Planner data (September 2025 to August 2026) shows what people search for.

Keyword Planner shows rounded buckets. The pattern is clear. People search for a named credit far more than the generic term.

Special Situations That Need Extra Care

Divorced or separated parents. Only one parent can claim a child for most credits. Custody rules decide who.

Students with scholarships. Tax-free aid lowers qualified expenses. Treating part of a scholarship as taxable can raise the credit. Run both cases.

People without an SSN. The child tax credit requires valid SSNs for the filer and each child.

Older adults. The EITC without children ends at 65. The Saver’s Credit still applies to those who contribute.

Low-income households. Credits can be your largest single tax event. EITC and ACTC refunds cannot be issued before mid-February under the PATH Act.

Self-employed workers. Enter net profit, not gross receipts.

Common Mistakes to Avoid

• Entering gross pay instead of AGI or MAGI.
• Forgetting that non-refundable credits stop at your tax.
• Claiming both AOTC and LLC for one student.
• Ignoring the marginal cost of extra pay in the EITC phase-out.
• Using the wrong tax year.
• Relying on the Saver’s Credit after 2026.

Pro Tips

• Run card 1 first. It reveals credits you did not know existed.
• Test “what if” income changes on cards 2 and 6 before choosing work hours.
• Keep records: pay stubs, Form 1098-T, childcare receipts, and Form 1095-A.
• Compare the FSA and credit before open enrollment.
• Recheck the calculator each January and April, when rules change.

Limitations

The calculator gives estimates. It does not file a return. It models federal rules with a few state and international options. It does not model the employee retention credit, UK tax credits (now replaced by Universal Credit), Canadian disability or GST/HST credits, or the adoption credit. Repayment caps on the premium credit are not modeled. Confirm figures with the IRS, your state, CRA, ATO, or Inland Revenue. This article is educational and is not legal or tax advice.

Frequently Asked Questions

What is a tax credit calculator?

A tax credit calculator estimates the credits you can claim on a tax return. It uses your income, filing status, and family details to check eligibility and calculate amounts for credits such as the EITC and child tax credit.

How do I calculate my earned income credit?

Multiply earned income by your phase-in rate until you reach the maximum. Then subtract the phase-out rate times income above the phase-out start. The credit equals the smaller of the two results. Card 2 does this automatically.

How much will I get from the EITC?

The 2026 maximum is $664 with no children, $4,427 with one, $7,316 with two, and $8,231 with three or more. Your amount depends on income and filing status. A single filer with two children earning $24,000 gets $7,293.

What is the difference between EIC and EITC?

There is no difference. EIC stands for earned income credit. EITC stands for earned income tax credit. Both names refer to the same federal credit.

Is the child tax credit refundable?

Part of it is. The credit is $2,200 per child for 2026, and up to $1,700 per child is refundable as the ACTC. The refundable part equals 15% of earnings above $2,500.

What is the difference between a tax credit and a tax deduction?

A credit reduces your tax bill dollar for dollar. A deduction reduces taxable income. A $1,000 credit saves $1,000. A $1,000 deduction saves $220 in the 22% bracket.

Can I claim the EITC without children?

Yes, if you are 25 to 64, have earned income, and pass the investment income test. The 2026 maximum is $664. It ends near $19,540 for single filers and $26,810 for joint filers.

Does the calculator work for self-employed people?

Yes. Enter net self-employment profit as earned income. The EITC counts net earnings. Self-employment tax and the qualified business income deduction are not modeled.

Why does my result differ from the IRS figure?

The calculator uses continuous formulas, and IRS tables round income into $50 bands. A few dollars of difference is normal. Wrong inputs cause larger gaps.

How do I calculate the premium tax credit?

Compare your income with the poverty line, apply the required contribution percentage, and subtract your contribution from the benchmark plan cost. Card 6 does this and shows your net after advance payments.

Are the American Opportunity Credit and the Lifetime Learning Credit the same?

No. The American Opportunity Credit gives up to $2,500 for the first four years of college and is 40% refundable. The Lifetime Learning Credit gives 20% of up to $10,000 with no year limit and is non-refundable.

Can I still claim the solar tax credit?

Not for expenses after December 31, 2025, under the calculator’s rules. The 30% credit applies to 2022 through 2025 expenses. Unused credit carries forward to later years.

Does this calculator include the UK Working Tax Credit?

No. The calculator does not model UK benefits. UK tax credits have been replaced by Universal Credit. Use the official UK government calculator instead.

When do EITC refunds arrive?

The PATH Act prevents EITC and ACTC refunds from being issued before mid-February. Early filers should not plan bills around a January deposit.

Conclusion

A tax credit calculator shows which credits you can claim and what each is worth. The EITC and child tax credit carry the most value for working families. Education, savings, care, health, and home credits add more. Start with card 1, follow the results to the right card, and finish with the refund estimator on card 12.

Adjust your paycheck with the salary calculator, or read our editorial policies and about page to see how we build our tools. Look up unfamiliar terms in the glossary.