What actually increases your tax refund

Your tax refund is the difference between what you paid in taxes during the year and what you actually owed. To increase it, you need to either pay more in taxes than required or reduce the amount you owe. The most direct ways are claiming deductions and credits you missed, adjusting your withholding so more money comes out of each paycheck, or correcting errors on past returns.

The size of your refund depends entirely on your income, filing status, and what you claim. There is no single action that works for everyone—what increases one person's refund might not change another's at all. The goal is to find which of these levers actually applies to your situation.

Key Takeaways

  • Claiming deductions and tax credits you missed on past returns can increase your refund when you file an amended return using Form 1040-X.
  • Adjusting your W-4 withholding form at work increases the amount taken from each paycheck, which means a larger refund when you file.
  • Correcting errors on your current return before filing—such as missed income, wrong filing status, or forgotten dependents—directly changes your refund amount.
  • Self-employment income, side gigs, and rental income often go unclaimed and can reduce your refund; reporting them correctly may lower your refund but prevents penalties.
  • Tax credits like the Earned Income Tax Credit (EITC) and Child Tax Credit are worth more than deductions and have the biggest impact on refund size.

Claim deductions and credits you may have missed

Deductions reduce the income you pay tax on. Credits reduce the tax itself, dollar for dollar, and some credits refund money back to you even if you owe no tax. Credits almost always increase your refund more than deductions do.

Common credits that increase refunds include the Earned Income Tax Credit (EITC), which can return $600 to $3,700 depending on income and family size; the Child Tax Credit, worth $2,000 per child under 17; and the American Opportunity Tax Credit, worth up to $2,500 for education expenses. The Saver's Credit applies if you contributed to a retirement account and earned under $68,250 (single) or $136,500 (married filing jointly) in 2023.

Deductions that often go unclaimed include student loan interest (up to $2,500), charitable donations, medical expenses over 7.5% of your adjusted gross income, and home office expenses if you work for yourself. If you missed these on a return filed in the past three years, you can file an amended return using Form 1040-X to claim them and receive the additional refund.

Adjust your W-4 withholding at work

Your employer withholds federal income tax from each paycheck based on the W-4 form you filled out when hired. If you want a larger refund, you can reduce the number of allowances or dependents you claim on your W-4, which tells your employer to take out more money each pay period. That extra money sits with the IRS until you file your return, when you get it back as a refund.

This is not the most efficient use of your money—you are essentially giving the government an interest-free loan all year—but it does increase your refund. To make the change, ask your HR or payroll department for a new W-4 form, or download it from the IRS website. The change takes effect on your next paycheck.

The opposite is also true: if you currently get a large refund every year, you are probably overwithholding. Increasing your allowances on the W-4 means less comes out each paycheck and you keep more money now, though your refund will shrink.

Correct errors before you file your current return

If you have not yet filed your 2024 return, review it carefully for common mistakes that reduce refunds. These include filing as single when you should file as married filing jointly, forgetting to claim a dependent, entering the wrong Social Security number, or missing income from a second job or side work.

The IRS will catch many of these errors and correct them, but that takes time and may delay your refund. Catching them yourself before filing means your refund processes faster and at the amount you intended. Use your pay stubs, 1099 forms, and bank statements to verify all income is listed, and double-check that every dependent's name and Social Security number match their actual documents.

Report all income, including side work and self-employment

Income from gig work, freelancing, rental properties, or selling items online must be reported on your tax return. Many people skip this income hoping to increase their refund, but the IRS receives copies of 1099 forms from platforms like DoorDash, Uber, Etsy, and Airbnb. When your reported income does not match what the IRS received, they will send you a notice and you will owe back taxes plus penalties.

Reporting this income may actually reduce your refund in the short term, because it increases the tax you owe. However, self-employed people can deduct business expenses—supplies, mileage, equipment, home office costs—which reduces taxable income and can bring your refund back up. The key is reporting everything and then claiming every legitimate deduction that applies to your work.

File an amended return if you missed something on a past year

If you filed a return in the past three years and later realized you missed a deduction, credit, or made an error, you can file an amended return using Form 1040-X. You must file a separate 1040-X for each year you are amending. The form asks you to show the original amount, the corrected amount, and the difference.

Mail the completed 1040-X to the IRS address listed in the form instructions for your state. Processing takes about 16 weeks from the date the IRS receives it. If the amendment results in a refund, the IRS will send it by check or direct deposit, depending on how you filed the original return. If you owe more, you will receive a bill with payment instructions.

Do not file an amended return if you are waiting for a refund from your original return—wait until you receive it first. Filing an amended return while the original is still processing can cause delays and confusion.

Understand the limits of what you can change

You cannot increase your refund by claiming deductions or credits you are not may have access to to. The IRS verifies credits like the EITC and Child Tax Credit, and false claims result in penalties, interest, and possible criminal charges. You also cannot increase your refund by inflating business expenses, claiming dependents who do not exist, or reporting false charitable donations.

What you can legitimately do is make sure you are claiming everything you are may have access to to. Many people leave money on the table by not knowing about credits they may have access to for or by forgetting deductions. The IRS does not automatically tell you about these—it is your responsibility to claim them when you file.

Frequently Asked Questions

Will increasing my W-4 withholding actually increase my refund?

Yes, but only if you are currently underwithholding. If your employer is already taking out the correct amount of tax, increasing withholding means overpaying, and you will get the overpayment back as a refund. However, this ties up your money all year. A better approach is to claim deductions and credits you missed, which increases your refund without reducing your take-home pay now.

Can I claim a dependent I forgot to list on my return?

If you have not yet filed, add them to your return before submitting it. If you already filed, you can file an amended return using Form 1040-X within three years. Each dependent typically increases your refund by the amount of the Child Tax Credit, currently $2,000 per child under 17.

What if I owe taxes instead of getting a refund—can I still increase it?

If you owe taxes, claiming additional deductions and credits reduces what you owe, which is the same as increasing a refund. For example, claiming the EITC might turn a $500 tax bill into a $1,000 refund. The mechanics are the same: deductions and credits change the final number in your favor.

How long does it take to get a refund from an amended return?

The IRS typically processes amended returns within 16 weeks of receiving them. If you file by mail, add time for delivery. You can check the status using the IRS "Where's My Amended Return?" tool on IRS.gov after 4 weeks.

Do I have to report income from selling used items online?

If you sold used personal items at a loss or for roughly what you paid, you generally do not report it. However, if you are running a business—buying items to resell for profit—all income must be reported. The IRS receives reports from platforms like eBay and Facebook Marketplace when sales exceed certain thresholds, so reporting it yourself prevents penalties later.