What actually changes the size of your refund

Your refund is the difference between what you paid in taxes during the year and what you actually owed. To make it bigger, you need to either pay more during the year or owe less at tax time. Most people can't suddenly pay more taxes they don't have to, so the real lever is lowering what you owe—and that happens through deductions and credits you may have missed.

The IRS doesn't automatically know about every deduction or credit you're may have access to to. You have to claim them on your return. If you filed last year and got a small refund, you likely left money on the table by not reporting income sources, expenses, or life changes that reduce your tax bill.

Key Takeaways

  • A bigger refund comes from paying more in taxes during the year or owing less when you file—most people can only control the second one.
  • Tax credits directly reduce what you owe and are worth more than deductions; the Earned Income Tax Credit and Child Tax Credit are the largest for most households.
  • Deductions lower your taxable income; you can either itemize specific expenses or take the standard deduction, whichever is larger.
  • Changes in income, dependents, home ownership, student loans, or business expenses from the previous year often mean you're may have access to to more back than you think.
  • Filing status matters—married filing jointly, head of household, and single have different standard deductions and credit amounts.

Tax credits that directly reduce what you owe

Tax credits are the most powerful tool because they subtract directly from your tax bill, dollar for dollar. A $1,000 credit means $1,000 less you owe. Deductions only reduce the income that gets taxed, so they're worth less.

The Earned Income Tax Credit (EITC) is the largest refundable credit for working people with low to moderate income. If you earned between roughly $15,000 and $60,000 (depending on filing status and dependents), you may be may have access to to $600 to $3,700 back. Many people who may have access to don't claim it because they don't know it exists. You must report all income—wages, self-employment, gig work—to be considered.

The Child Tax Credit is $2,000 per child under 17. If you have a child but didn't claim them, or if your income changed and you're now may have access to to more of the credit, that's a direct increase to your refund. The credit phases out at higher incomes, so your filing status and total income matter.

Other credits worth checking: the American Opportunity Tax Credit (up to $2,500 if you paid for college), the Lifetime Learning Credit (up to $2,000 for education), the Saver's Credit (if you contributed to a retirement account on low income), and the Dependent Care Credit (if you paid for childcare so you could work).

Deductions that lower your taxable income

You can either take the standard deduction—a flat amount based on your filing status—or itemize specific expenses. For 2024, the standard deduction is $14,600 for single filers, $29,200 for married filing jointly, and $21,900 for head of household. These amounts change each year.

Itemizing makes sense only if your deductible expenses add up to more than the standard deduction. Common itemized deductions include mortgage interest, state and local taxes (capped at $10,000), charitable donations, and medical expenses over 7.5% of your income. If you own a home, paid property taxes, or gave to charity, add those up and compare to the standard deduction.

If you're self-employed or have a side business, you can deduct business expenses—home office, equipment, mileage, supplies. Many people with gig work (delivery, rideshare, freelance) don't deduct these and overpay. Keep receipts and track mileage if you drive for work.

Student loan interest (up to $2,500 per year) and contributions to traditional IRAs are also deductible, even if you don't itemize. These reduce your taxable income directly.

Changes in your life that increase deductions or credits

If your situation changed since last year, your refund should change too. Got married, divorced, had a child, bought a house, started a business, or went back to school? Each of these opens up different deductions or credits.

A new dependent (child, grandchild, or may have access to relative you support) means the Child Tax Credit and potentially the EITC. A home purchase means mortgage interest and property tax deductions. A job loss or income drop may make you newly may be able to access for the EITC or other credits you didn't may have access to for before. Education expenses unlock the American Opportunity or Lifetime Learning credits.

If you got divorced or separated, your filing status changed, which affects your standard deduction and the credits you can claim. If you had a child in December, you can claim them for the full year even though they were born at year's end.

Adjusting your withholding for next year

If you got a large refund this year, the IRS held too much of your paycheck. You can adjust your W-4 form with your employer to have less withheld, which puts more money in your pocket each paycheck instead of waiting for a refund. Use the IRS withholding calculator on irs.gov to see if you should claim more allowances.

The opposite is also true: if you owed money at tax time, you're having too little withheld. Adjust your W-4 to claim fewer allowances so more is taken out each paycheck. This prevents owing a large bill next April.

Self-employed people and those with investment income should make quarterly estimated tax payments to avoid underpayment penalties. The IRS Form 1040-ES walks through the calculation.

Common refund mistakes that cost you money

Not reporting all income is the most common error. If you have a side job, freelance work, rental income, or investment income, it all has to go on your return. The IRS gets copies of 1099 forms from employers and financial institutions, so unreported income gets flagged.

Claiming the wrong filing status costs money. If you're unmarried but supporting a dependent, you may may have access to for head of household status, which has a higher standard deduction than single. If you're married, filing jointly almost always gives you a bigger refund than filing separately.

Forgetting dependents is surprisingly common. If you have a child, grandchild, or other relative you support, and they meet the IRS rules (relationship, age, citizenship, residency, income), claim them. Each one is worth thousands in credits and deductions.

Not keeping records of deductible expenses means you can't claim them. Charitable donations, medical bills, business expenses, and education costs all need documentation if you're audited. Keep receipts, bank statements, and mileage logs for at least three years.

When to file your return yourself versus using a tax professional

If your situation is straightforward—one job, no dependents, no home or business—filing yourself with free software (IRS Free File, TurboTax Free, TaxAct Free) works fine. The IRS Free File program is available to people earning under roughly $79,000.

If you have dependents, own a home, are self-employed, have investment income, or experienced a major life change, a tax professional may find deductions and credits you'd miss. The cost of a preparer (typically $150 to $500) often pays for itself in a larger refund. Look for a CPA, Enrolled Agent, or tax attorney—these are IRS-credentialed professionals.

Many nonprofits offer free tax preparation through the Volunteer Income Tax information (VITA) program, which serves people earning under $79,000. Search for VITA sites near you on irs.gov.

Frequently Asked Questions

Can I claim a deduction for something I didn't actually pay for?

No. Deductions and credits require actual expenses or income changes. The IRS matches your return against 1099 forms, W-2s, and other documents filed by employers and institutions. Claiming false deductions triggers audits and penalties, including interest on unpaid taxes.

If I get a bigger refund, does that mean I'm getting information programs?

No. A refund is your own money that you overpaid in taxes during the year. The IRS is returning what you lent them interest-free. A bigger refund means you paid more than you owed, not that you gained anything extra.

What if I missed a deduction or credit on last year's return?

You can file an amended return using Form 1040-X within three years of the original filing date. If you're owed more money, the IRS will send it. If you owe more, you'll receive a bill with interest.

Does getting a refund affect my benefits or loans?

A tax refund is counted as income in the year you receive it for purposes of means-tested programs like SNAP, Medicaid, or housing information. If you're on a tight budget and rely on these programs, a large refund in one month could affect your benefits that month. Spreading income more evenly through adjusted withholding avoids this.

Should I claim my adult child as a dependent if they live with me?

Only if they meet all the IRS rules: they're related to you, under 24 and a full-time student (or any age and disabled), a U.S. citizen, lived with you for the whole year, and earned less than $4,700 in 2024. If they meet these rules, yes—you get the dependent exemption and may may have access to for credits. If they don't, claiming them is fraud.