The two ways to change your refund size

A bigger refund comes from one of two places: you can reduce the amount your employer withholds from each paycheck, or you can claim deductions and credits you missed on your last return. The first changes your take-home pay right now. The second changes what you owe when you file next year. Most people who want a larger refund are actually looking at the second option—finding money they were already may have access to to but didn't claim.

The size of your refund is not something the IRS decides for you. It is the difference between what you paid in taxes (through withholding or estimated payments) and what you actually owed. If you paid in $6,000 and owed $4,000, you get $2,000 back. To get more money back, you either need to have paid more in, or you need to have owed less.

Key Takeaways

  • A larger refund usually means claiming deductions or credits you did not claim before, not paying more tax throughout the year.
  • Common missed deductions include student loan interest, educator expenses, and charitable donations if you itemize instead of taking the standard deduction.
  • Tax credits like the Earned Income Tax Credit or Child Tax Credit reduce what you owe dollar-for-dollar and often produce refunds larger than your withholding.
  • If you want to change your take-home pay to increase withholding, you file a new W-4 with your employer, but this reduces your paycheck now.
  • Changing your withholding does not change your refund unless your actual tax liability changes—it only changes when you get the money.

Deductions you may have missed on your last return

Deductions lower the income you pay tax on. If you took the standard deduction last year (a flat amount based on your filing status), you may have left money on the table if your actual deductible expenses were higher. Common deductions people overlook include student loan interest (up to $2,500 per year if you paid it), educator expenses (teachers can deduct up to $300 in classroom supplies), and IRA contributions you made but did not report.

If you own a home, paid property taxes, state income taxes, or mortgage interest, those are deductible—but only if you itemize instead of taking the standard deduction. Itemizing means adding up all your deductible expenses and using that total instead of the standard amount. For most people, the standard deduction is larger, so itemizing does not help. But if you had high medical expenses, large charitable donations, or significant state and local taxes, itemizing might reduce your taxable income enough to lower what you owe.

Charitable donations are deductible only if you itemize. If you donated to may have access to charities last year and took the standard deduction, you did not get the tax benefit. The same applies to unreimbursed employee expenses, tax preparation fees, and investment losses (up to $3,000 per year against ordinary income).

Tax credits that produce refunds larger than your withholding

A tax credit is different from a deduction. A credit reduces your tax bill dollar-for-dollar. A $1,000 credit means you owe $1,000 less. Many credits are refundable, meaning if the credit is larger than what you owe, the IRS sends you the difference. This is how people get refunds even when they had little or no tax withheld.

The Earned Income Tax Credit (EITC) is the largest refundable credit for working people with low to moderate income. Depending on your income and filing status, you may receive $600 to $3,700 back. You do not have to have paid in that much—the credit itself generates the refund. The Child Tax Credit is $2,000 per child under 17, and part of it (up to $1,700 per child) is refundable. The American Opportunity Credit for education expenses is up to $2,500 per student and is partially refundable.

Other credits include the Saver's Credit (for retirement contributions if your income is low), the Dependent Care Credit (for childcare expenses), and the Adoption Credit. If you did not claim these on your last return and you meet the requirements, you can file an amended return (Form 1040-X) to claim them now and receive the refund.

When to increase your withholding instead

If you want the IRS to hold more of your paycheck each week so you get a bigger refund at tax time, you file a new Form W-4 with your employer. This tells your employer to withhold more federal income tax. The result is a smaller paycheck now and a larger refund later. This does not change how much you owe in taxes—it only changes when you receive the money.

Most people should not do this. A larger refund means you gave the government an interest-free loan all year. You could have kept that money in your bank account, spent it, or invested it. The IRS does not pay you interest on the overpayment. However, if you struggle to save money or you know you will owe taxes next year and want to build a cushion, increasing withholding is one way to force yourself to set money aside.

To increase withholding, ask your HR or payroll department for a W-4 form. On the form, you can claim fewer allowances or enter an additional amount to withhold each pay period. The more allowances you claim, the less tax is withheld. The fewer allowances, the more is withheld. If you want to withhold an extra $50 per paycheck, you can enter that directly on the form.

How to file an amended return to claim missed deductions or credits

If you filed your return already and realized you missed a deduction or credit, you can file an amended return using Form 1040-X. You must file it within three years of the original return's due date (or three years from when you filed it, whichever is later). For a 2023 return, the deadline is April 15, 2026.

On Form 1040-X, you report the original amounts from your filed return, the corrected amounts, and the difference. You attach any documents that support the change—receipts for charitable donations, a 1098-T for education credits, proof of student loan interest paid, and so on. Mail the form to the IRS address for your state, or file it electronically through tax software if your software supports amended returns.

The IRS typically processes amended returns in 16 weeks. If you are owed a refund, they will mail a check or deposit it to your bank account (if you provided banking information on the form). If the amendment means you owe more, you should pay as soon as you file to avoid interest and penalties, though the IRS will bill you if you do not.

Income changes that affect your refund

If your income dropped compared to last year, you may owe less tax, which means a larger refund if you had the same withholding. If you were laid off mid-year, worked part-time, or had a business loss, your actual tax liability is lower than your employer assumed when withholding. The difference shows up as a refund.

The opposite is also true: if your income rose, you may owe more even if your withholding stayed the same. Side income, investment gains, or a second job can push you into a higher tax bracket. In this case, you might owe money at tax time instead of receiving a refund. If you expect this to happen next year, you can increase your withholding now using Form W-4 to avoid owing a large amount in April.

Life changes that unlock new deductions or credits

Marriage, divorce, having a child, adopting, buying a home, or going back to school all create new deductions or credits. If you got married last year and filed separately, you might save money by filing jointly this year. If you had a baby, you can claim the Child Tax Credit and possibly the Dependent Care Credit if you paid for childcare. If you bought a home, you can deduct mortgage interest and property taxes (if you itemize).

Education expenses unlock the American Opportunity Credit, the Lifetime Learning Credit, or the Tuition and Fees Deduction, depending on your situation. If you made retirement contributions (to a traditional IRA, SEP-IRA, or Solo 401(k)), those are deductible. If you paid student loan interest, that is deductible up to $2,500. Each of these changes what you owe and can increase your refund.

Frequently Asked Questions

Can I get a refund larger than what I paid in taxes?

Yes, if you have refundable tax credits. The Earned Income Tax Credit and the refundable portion of the Child Tax Credit can produce refunds even if you had no tax withheld or paid no taxes. The credit itself generates the refund, not your withholding.

If I increase my withholding, will I get a bigger refund?

Yes, but only because you will have paid more in. Your actual tax liability does not change. You are essentially giving the government an interest-free loan by having them hold more of your paycheck. You could achieve the same result by saving the difference yourself.

How far back can I claim deductions or credits I missed?

You can file an amended return up to three years after the original return's due date. For a 2023 return filed in April 2024, you have until April 2027 to amend it. After that, you cannot claim the deduction or credit.

Do I have to itemize to get a bigger refund?

Only if your deductible expenses are higher than the standard deduction. For most people, the standard deduction is larger, so itemizing does not help. But if you had high medical bills, large charitable donations, or significant state and local taxes, itemizing might lower what you owe.

What if I owe money instead of getting a refund?

You can pay the IRS in full by the tax deadline, set up a payment plan, or request an extension to file (though you still owe interest and penalties on late payments). If you expect to owe next year, increase your withholding now using Form W-4 to spread the payment across your paychecks instead.