What actually determines your refund size

Your refund is not something you earn or unlock through strategy. It is the difference between what you already paid in taxes during the year and what you actually owe. If you paid $5,000 and owe $3,000, your refund is $2,000. If you paid $3,000 and owe $5,000, you owe money instead.

The only way to increase your refund is to either pay more during the year or reduce what you owe. Most people cannot control how much they pay without changing their job or income. What you can control is what you report on your return — specifically, which deductions and credits you claim. Missing deductions or credits you are may have access to to means leaving money on the table.

The IRS does not volunteer information about deductions or credits you might have missed. You have to know they exist, understand whether you meet the conditions, and claim them yourself on your return.

Key Takeaways

  • Your refund is the gap between taxes you paid and taxes you owe; the only way to increase it is to claim deductions or credits you have not yet claimed.
  • Common missed deductions include student loan interest, educator expenses, and medical costs above 7.5% of your income; common missed credits include the Earned Income Tax Credit and the Child and Dependent Care Credit.
  • Deductions reduce the income you report; credits reduce the tax you owe directly, so a $1,000 credit is worth more than a $1,000 deduction.
  • The IRS does not tell you which deductions or credits apply to your situation; you must track your own expenses and research what you may have access to for.
  • If you discover you missed a deduction or credit in a prior year, you can file an amended return (Form 1040-X) within three years of the original filing date.

Deductions you may have overlooked

A deduction reduces the income you report to the IRS. If you earned $60,000 and claim $5,000 in deductions, you report $55,000 as taxable income. The tax savings depend on your tax bracket — someone in the 22% bracket saves $1,100 on a $5,000 deduction.

The most commonly missed deductions are student loan interest (up to $2,500 per year if you paid interest on federal or private student loans), educator expenses (up to $300 per year if you are a K-12 teacher who bought classroom supplies), and unreimbursed medical expenses (only the portion above 7.5% of your adjusted gross income). If you are self-employed, you can deduct half of your self-employment tax, home office expenses, and business supplies — but only if you track them throughout the year.

If you itemize deductions instead of taking the standard deduction, you can claim state and local taxes (capped at $10,000), mortgage interest, charitable donations, and certain investment losses. Many people take the standard deduction without checking whether itemizing would be larger. The standard deduction for 2024 is $14,600 for single filers and $29,200 for married filing jointly, but if you have significant medical costs, charitable giving, or state taxes, itemizing may be worth more.

Tax credits that directly reduce what you owe

A tax credit reduces your tax bill dollar-for-dollar. A $1,000 credit saves you $1,000 in tax. A $1,000 deduction saves you $220 to $370 depending on your bracket. Credits are more valuable, and many people do not claim them because they do not know they exist.

The Earned Income Tax Credit (EITC) is the largest missed credit. If you earned less than $63,398 (single) or $101,568 (married filing jointly) in 2024, and your income came from wages or self-employment, you may may have access to for a credit worth $600 to $3,995. You do not have to have children to claim it, though the credit is larger if you do. The IRS has a tool on its website to check whether you may have access to.

The Child and Dependent Care Credit covers up to $3,000 in childcare or adult dependent care expenses per year and reduces your tax by 20% to 35% of that amount. The Child Tax Credit is $2,000 per child under 17. The American Opportunity Tax Credit covers up to $2,500 per student in higher education expenses. The Lifetime Learning Credit covers up to $2,000 per return for other education costs. You cannot claim both the American Opportunity and Lifetime Learning credits for the same student in the same year, so you have to choose which one saves you more.

If you paid adoption expenses, installed energy-efficient windows or a heat pump, or made charitable donations of appreciated stock, you may also have credits or deductions available. The IRS website has a credits and deductions tool that walks through common scenarios.

How to find deductions and credits that apply to you

Start by gathering receipts and records from the past year: medical bills, property tax statements, mortgage interest statements (Form 1098), student loan interest statements (Form 1098-E), childcare invoices, charitable donation receipts, and business expense records. The IRS does not require you to submit these with your return, but you must have them if the IRS asks.

Next, use the IRS Interactive Tax Assistant on irs.gov to answer questions about your situation. It will tell you which deductions and credits you may be able to claim. You can also read IRS Publication 17 (Your Federal Income Tax), which covers common deductions and credits in plain language. If your situation is complex — you are self-employed, you have rental income, you sold investments — consider paying for a tax professional to review your return before you file. The cost of a consultation often pays for itself if they find deductions you missed.

If you use tax software, most programs ask questions that prompt you to enter deductions and credits. However, they only ask about the ones the software is programmed to ask about. If you have an unusual situation, you may need to manually add a deduction or credit that the software did not prompt you for.

Amended returns for refunds you missed in prior years

If you filed a return in a prior year and later realized you missed a deduction or credit, you can file an amended return using Form 1040-X. You have three years from the original filing date to claim a refund for a missed deduction or credit. After three years, the IRS keeps the money.

To file an amended return, you must report the original amount you claimed, the corrected amount, and the difference. You can file Form 1040-X by mail or through some tax software. The IRS typically processes amended returns within 16 weeks of receipt. If you are owed a refund, it will be sent by check or direct deposit. If you owe money, you will receive a bill.

Do not file an amended return if you made a mistake that reduced your refund — for example, if you claimed a deduction you were not may have access to to. The IRS may not catch it, and filing an amended return draws attention to your return. If the IRS discovers the error on its own, you will owe the tax plus interest and penalties. If you are unsure whether a deduction is legitimate, ask a tax professional before filing.

Withholding adjustments for next year

If you receive a large refund every year, you are having too much tax withheld from your paycheck. That money could be in your bank account now instead of waiting for a refund. To adjust your withholding, fill out a new Form W-4 with your employer. The form asks about your income, dependents, and other jobs. Based on your answers, it calculates how much tax should be withheld from each paycheck.

You can adjust your W-4 at any time during the year. If you expect to owe money this year, you can also increase your withholding to avoid a bill in April. The IRS has a withholding calculator on its website that estimates how much should be withheld based on your situation.

What not to do when chasing a larger refund

Do not claim deductions or credits you are not may have access to to. The IRS matches information from employers, banks, and other sources to your return. If you claim a $5,000 education credit but did not pay education expenses, or you claim a home office deduction but do not have a dedicated workspace, the IRS will disallow it. You will owe the tax you avoided, plus interest and penalties that can add 20% to 75% to the amount owed.

Do not ignore notices from the IRS. If the IRS disallows a deduction or credit, it will send you a letter explaining why and how much you owe. You have the right to respond and provide documentation. If you ignore the notice, the IRS will assess the tax and may take collection action.

Do not pay someone to "find" hidden refunds or credits. Legitimate deductions and credits are available to anyone who meets the conditions. No one has access to secret programs or loopholes. If someone promises to find money the IRS missed, they are either going to claim deductions you are not may have access to to or charge you a large fee for information you can find free on irs.gov.

Frequently Asked Questions

Can I claim a deduction if I do not have a receipt?

The IRS does not require you to submit receipts with your return, but you must have them if audited. For small amounts, the IRS may accept a written statement of what you spent and when. For large amounts or business expenses, a receipt is expected. If you lost receipts, reconstruct what you can from bank or credit card statements.

What is the difference between the standard deduction and itemizing?

The standard deduction is a fixed amount everyone can claim ($14,600 for single filers in 2024). Itemizing means adding up your deductions and claiming that total instead. Itemize only if your deductions add up to more than the standard deduction. Most people benefit from the standard deduction.

If I claim a credit I am not may have access to to, what happens?

The IRS will disallow it and send you a bill for the tax you avoided, plus interest (currently around 8% per year) and penalties (20% to 75% depending on the type of error). If the IRS suspects fraud, criminal penalties are possible. Always verify you meet the conditions before claiming a credit.

How long does it take to get a refund after I file an amended return?

The IRS typically processes amended returns within 16 weeks. If you file by mail, add time for delivery. If you file electronically through tax software, processing is usually faster. You can check the status on irs.gov using your Social Security number and the exact refund amount.

Can I claim the same credit twice if I have two jobs?

No. Credits are claimed per return, not per job. If you have two jobs and both employers withheld tax, you claim one refund on one return. However, you may be able to claim certain credits multiple times if you have multiple dependents or multiple education expenses — read the credit rules carefully.