What determines the size of your tax refund

Your refund is the difference between what you paid in taxes during the year and what you actually owed. The larger that gap, the larger your refund. You create that gap in two ways: by having too much withheld from your paychecks, or by claiming deductions and credits you're may have access to to but haven't claimed before.

Most people get a refund because their employer withholds more than necessary—they're essentially giving the government an interest-free loan all year. The IRS doesn't pay you interest on that overpayment. The second path to a bigger refund is claiming every deduction and credit that applies to your situation. Many people miss these because they don't know they exist or assume they don't may have access to.

The size of your refund depends entirely on your income, filing status, dependents, and what you spent money on during the year. There's no single "best" refund amount—the goal is to owe as close to zero as possible on April 15, not to maximize what comes back.

Key Takeaways

  • Adjust your W-4 form with your employer if you're getting a large refund every year, because that money could be in your paycheck instead.
  • Common deductions you may be missing include student loan interest, educator expenses, and medical costs above 7.5% of your income.
  • Tax credits like the Earned Income Tax Credit and Child Tax Credit are worth far more than deductions and often go unclaimed.
  • Keeping receipts and records throughout the year for charitable donations, medical expenses, and business costs makes claiming deductions straightforward.
  • Using tax software or a tax preparer costs money upfront but often pays for itself by finding credits and deductions you'd miss on your own.

Adjust your withholding if you get a large refund every year

If you received more than $500 back last year, you're having too much withheld. That's money you could have used during the year instead of waiting for April. The fix is updating your W-4 form with your employer.

You can file a new W-4 at any time—you don't have to wait until January. The form asks about your income, dependents, and other jobs. Based on your answers, it calculates how much should come out of each paycheck. If you're married and both spouses work, or if you have side income, the calculation gets more complex, but the IRS W-4 calculator on irs.gov walks you through it step by step.

Changing your withholding doesn't change your total tax bill—it just spreads it differently across the year. You'll owe the same amount on April 15, but you'll have had access to that money in your paychecks instead of getting it back as a refund.

Claim deductions you're may have access to to but may have missed

A deduction reduces the income the IRS taxes you on. The standard deduction for 2024 is $14,600 for single filers and $29,200 for married couples filing jointly—most people use this instead of itemizing. But if you have specific expenses, itemizing can give you a larger deduction.

Common deductions people miss include student loan interest (up to $2,500 per year), educator expenses if you're a teacher (up to $300), and medical expenses above 7.5% of your adjusted gross income. If you're self-employed, you can deduct home office space, equipment, supplies, and a portion of your health insurance premiums. Charitable donations to may have access to organizations are deductible if you itemize.

Keep receipts and records throughout the year. For medical expenses, save invoices from doctors, dentists, and pharmacies. For charitable donations, keep written acknowledgment from the organization—a receipt or letter stating the amount and what you received in return (if anything). For business expenses, save receipts and a straightforward log of what you spent and when.

Claim tax credits that are worth more than deductions

A tax credit reduces your tax bill dollar for dollar, making it far more valuable than a deduction. A $1,000 deduction saves you roughly $120 to $370 in taxes depending on your tax bracket. A $1,000 credit saves you exactly $1,000.

The Earned Income Tax Credit (EITC) is the largest refundable credit for working people with lower incomes. If you earned less than roughly $60,000 and have little or no investment income, you may may have access to. The credit ranges from a few hundred to over $3,600 depending on your income and whether you have dependents. Many people who may have access to don't claim it because they don't know it exists.

The Child Tax Credit is $2,000 per child under 17. The Child and Dependent Care Credit covers costs of daycare or after-school programs so you can work. The American Opportunity Tax Credit covers education expenses for students in their first four years of college—up to $2,500 per student per year. The Lifetime Learning Credit covers graduate school and other education expenses.

These credits have income limits and specific requirements. The IRS website and most tax software will ask you questions to determine which ones you may have access to for. If you miss one, you can amend your return using Form 1040-X within three years.

Use tax software or a tax preparer to find what you're missing

Tax software like TurboTax, H&R Block, and TaxAct ask you detailed questions about your income, expenses, dependents, and life events. As you answer, the software flags deductions and credits you may may have access to for. It's not perfect—you have to know what to tell it—but it catches far more than most people would on their own.

A tax preparer or CPA costs money upfront, typically $150 to $500 depending on complexity, but often finds deductions and credits worth more than the fee. This is especially true if you're self-employed, have investment income, own rental property, or had a major life change like a marriage, divorce, or job loss.

If you earned less than roughly $60,000 and meet other requirements, you may be able to use a free tax preparation service through the IRS Volunteer Income Tax information (VITA) program. Search "VITA near me" on irs.gov to find a location.

Organize your records before you file

Gather documents before you sit down to file. You'll need your Social Security number, date of birth, and filing status. Bring W-2 forms from every employer, 1099 forms for any side income or interest, and receipts for deductions you plan to claim.

If you have dependents, you'll need their Social Security numbers and birthdates. If you're claiming education credits, gather 1098-T forms from the school or your receipts for tuition and fees. If you're claiming the EITC, have your income documentation ready—the software or preparer will ask for it.

Keep records for at least three years. The IRS can audit a return up to three years after you file, and longer if they suspect underreporting of income. For business expenses and rental property, keep records for seven years.

Understand what you can and cannot deduct

You can deduct expenses that are ordinary and necessary for your work or business. For a self-employed person, that includes office supplies, equipment, vehicle mileage, and a portion of your home if you have a dedicated workspace. For an employee, it's much more limited—educator expenses and union dues are deductible, but most other work expenses are not.

You cannot deduct personal expenses like groceries, gas for commuting, or clothing (unless it's a uniform required for work and unsuitable for everyday wear). You cannot deduct fines or penalties. You cannot deduct federal income taxes you paid, though you can deduct state and local taxes up to $10,000 total.

If you're unsure whether something is deductible, the IRS website has a search function and publication library. Publication 17 covers the standard deduction and itemized deductions. Publication 587 covers home office deductions. Publication 334 covers business income and expenses.

Frequently Asked Questions

Can I get a bigger refund by claiming dependents I don't have?

No. Claiming a dependent you're not may have access to to is tax fraud. The IRS matches Social Security numbers to returns and catches this. The penalty is the tax owed plus interest plus a fraud penalty of 75% of the underpaid tax, plus potential criminal charges.

What if I made a mistake on last year's return?

File Form 1040-X, the amended return form, within three years of the original filing date. You can claim deductions or credits you missed, or correct errors. The IRS will send you a bill or refund for the difference.

Does filing early get me a bigger refund?

No. Your refund size is determined by what you earned and what you paid in taxes, not when you file. Filing early does mean you get your refund sooner, but the amount stays the same.

Should I claim the standard deduction or itemize?

Itemize only if your deductible expenses add up to more than the standard deduction for your filing status. For 2024, that's $14,600 for single filers and $29,200 for married couples. Add up your charitable donations, medical expenses above 7.5% of income, and state and local taxes. If the total exceeds the standard deduction, itemize. Otherwise, take the standard deduction.

What if I owe taxes instead of getting a refund?

You can pay in full by the important date, set up a payment plan with the IRS, or request an extension to file (though you still owe by April 15). The IRS offers short-term plans with no setup fee and long-term plans with a small fee. Visit irs.gov or call 1-800-829-1040 to set one up.