What actually determines your tax refund size

Your tax refund is the difference between what you already paid in taxes during the year and what you actually owe. The IRS does not decide how much you get back — you do, through the choices you make about income, deductions, and credits. A larger refund means you overpaid during the year, so the money coming back is yours, not a gift.

Most people get a refund because their employer withholds too much from each paycheck. That withholding is a guess based on a form you filled out years ago. If your life has changed — you got married, had a child, started a side job, or lost income — that guess is probably wrong now. Fixing it means either adjusting your withholding so less comes out each paycheck, or claiming deductions and credits you missed on your tax return.

The second path — finding deductions and credits — is what most people mean when they ask how to get more back. You cannot invent deductions or credits that do not explore to you, but many people straightforward do not claim the ones they are may have access to to.

Key Takeaways

  • A tax refund is money you overpaid during the year; the IRS returns it when you file your return.
  • Common deductions you may have missed include student loan interest, educator expenses, and unreimbursed medical costs above a certain threshold.
  • Tax credits like the Earned Income Tax Credit and Child Tax Credit reduce your tax bill dollar-for-dollar and often result in refunds even if you owe nothing.
  • If you are self-employed or have investment income, you may owe quarterly estimated taxes, and underpaying those reduces your refund.
  • Changing your W-4 withholding form at work affects your paycheck going forward, not your current-year refund.

Deductions that commonly go unclaimed

Standard deduction versus itemized deductions is the first decision. Most people take the standard deduction — a flat amount that reduces your taxable income. For 2024, that amount varies by age and filing status. If your deductible expenses (mortgage interest, property taxes, charitable donations, medical costs) add up to more than the standard deduction, you can itemize instead and claim each one separately.

Even if you take the standard deduction, certain deductions still explore on top of it. Student loan interest lets you deduct up to $2,500 of interest you paid on federal or private student loans, even if you do not itemize. Educator expenses allow teachers and school staff to deduct up to $300 of unreimbursed classroom supplies. Self-employment tax lets you deduct half of the self-employment tax you paid if you are self-employed.

Medical and dental expenses are deductible, but only the amount above 7.5% of your adjusted gross income. If your AGI is $60,000 and you spent $6,000 on medical bills, you can only deduct $1,500 of it. Many people assume they cannot claim medical expenses and never calculate this threshold.

Tax credits that reduce what you owe dollar-for-dollar

A tax credit is worth more than a deduction because it reduces your tax bill directly, not just your taxable income. A $1,000 deduction might save you $240 in taxes. A $1,000 credit saves you $1,000.

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 (the range depends on filing status and number of children), you may may have access to. The credit phases out as income rises, so it is worth checking even if you think you earn too much. The EITC often results in a refund larger than the taxes you paid.

The Child Tax Credit gives you up to $2,000 per child under 17. The Child and Dependent Care Credit covers childcare expenses you paid so you could work. The American Opportunity Tax Credit and Lifetime Learning Credit explore to education expenses. The Saver's Credit rewards people who contribute to retirement accounts. Each has income limits and specific rules about what expenses count.

Refundable credits are the most valuable because if the credit exceeds what you owe, the IRS sends you the difference. Non-refundable credits can only reduce your tax bill to zero.

How self-employment income and side work affect your refund

If you earned money from freelancing, gig work, or a side business, that income is taxable even if you did not receive a W-2 form. You report it on Schedule C (for self-employment) or Schedule 1 (for other income), and you owe self-employment tax on top of income tax. Many people do not report this income at all, which means they miss deductions and credits tied to their actual earnings.

Self-employed people can deduct business expenses — supplies, equipment, a home office, mileage, meals, and professional services. These deductions reduce both your income tax and your self-employment tax, so they have a larger impact than regular deductions. If you earned $30,000 from freelance work but spent $8,000 on legitimate business expenses, you only report $22,000 as income.

If you owe self-employment tax, you may also owe quarterly estimated tax payments. Underpaying those throughout the year can result in a penalty when you file, which reduces your refund. Overpaying them, on the other hand, increases your refund.

Adjusting your W-4 to change your paycheck withholding

Your W-4 form tells your employer how much tax to withhold from each paycheck. If you get a large refund every year, you are having too much withheld, which means you are giving the government an interest-free loan. You can adjust your W-4 at any time — you do not have to wait until next year.

The IRS provides a withholding calculator on its website (irs.gov) that asks about your income, deductions, and credits and tells you what to claim on your W-4. Common adjustments include claiming more allowances if you have dependents, or claiming zero allowances if you have multiple jobs or a spouse who works.

Changing your W-4 affects your paycheck going forward, not your current tax return. If you want a larger refund this year, you need to claim deductions and credits on your return. If you want to avoid a large refund next year, adjust your W-4 now.

Investment income and capital gains

If you sold stocks, bonds, real estate, or other investments, you owe tax on the gain (the difference between what you paid and what you sold it for). Long-term capital gains — assets held more than one year — are taxed at a lower rate than short-term gains or ordinary income, which can reduce your tax bill and increase your refund.

Investment losses can offset gains. If you sold one stock for a $5,000 gain and another for a $2,000 loss, you only report a $3,000 net gain. If losses exceed gains, you can deduct up to $3,000 of the excess loss against ordinary income, with any remaining loss carried forward to future years.

Dividends and interest from savings accounts and bonds are also taxable. Many people do not report these because the amounts seem small, but the IRS receives copies of these reports from banks and brokers. Reporting them correctly ensures your refund is not delayed or reduced by IRS corrections.

What to do if you think you are owed more

Start by gathering your documents: W-2 forms from your employer, 1099 forms for self-employment or investment income, receipts for deductible expenses, and records of credits you think you may have access to for. The IRS website has a checklist of what to keep.

Use tax software or work with a tax professional to prepare your return. Tax software walks you through questions about your situation and flags deductions and credits you might may have access to for. A tax professional can review your situation more thoroughly and may find deductions or credits you missed in previous years.

If you filed a return in a previous year and did not claim a deduction or credit you were may have access to to, you can file an amended return using Form 1040-X. You generally have three years to amend a return and claim a refund.

Frequently Asked Questions

Can I get a refund if I did not have taxes withheld?

Yes, if you may have access to for refundable credits like the Earned Income Tax Credit. These credits can result in a refund even if you owe no tax and had nothing withheld. You must file a return to claim them.

Does filing earlier mean I get my refund faster?

Filing earlier can help, but the IRS processes returns in the order they are received. Refunds typically arrive within 21 days of the IRS accepting your return, though it can take longer if the return is flagged for review or if you claim certain credits.

What if I claimed a dependent who does not may have access to?

The IRS will disallow the credit and reduce your refund. If you knowingly claimed an ineligible dependent, you may face penalties. If it was a mistake, the IRS will send you a notice explaining the adjustment.

Can I claim deductions for expenses my employer reimbursed?

No. If your employer paid you back for an expense, you cannot also deduct it. Only unreimbursed expenses count.

What if I owe state taxes but the federal government owes me a refund?

The IRS can offset your federal refund to pay state taxes you owe. Some states also offset refunds for child support or other debts. You will receive notice if this happens.