What actually changes your refund amount

Your refund grows when you reduce the taxes you owe or increase the taxes already withheld from your paychecks. The IRS does not decide how much you get back—you do, through the choices you make about deductions, credits, and withholding. A bigger refund does not mean you earned more money; it means you either paid more tax during the year than you owed, or you claimed deductions and credits the IRS allowed.

The most direct path to a larger refund is claiming every deduction and credit you are may have access to to. Many people leave money on the table because they do not know these exist, do not understand how to claim them, or assume they do not may have access to. The second path is adjusting your withholding so less tax comes out of each paycheck—though this reduces your refund the following year, it puts money in your pocket now instead of waiting for April.

Key Takeaways

  • Tax credits reduce the tax you owe dollar-for-dollar and are worth far more than deductions; the Earned Income Tax Credit and Child Tax Credit are the largest for most households.
  • Deductions lower your taxable income; the standard deduction is automatic, but itemized deductions (mortgage interest, charitable donations, medical expenses) can be larger if you track them carefully.
  • Adjusting your W-4 form at work changes how much tax your employer withholds, which changes your refund size the following year.
  • Self-employment income, rental income, and side gigs often have deductions that W-2 employees miss, such as home office space, equipment, and mileage.
  • Claiming dependents, education credits, and retirement contributions can each add hundreds or thousands to your refund if you meet the requirements.

Tax credits that directly reduce what you owe

A tax credit is worth more than a deduction because it subtracts directly from the tax you owe, not just from your income. If you owe $2,000 in tax and claim a $500 credit, you now owe $1,500. A $500 deduction only reduces your taxable income by $500, which might save you $100 to $150 depending on your tax bracket.

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 varies by filing status and number of dependents), you may receive $600 to $3,700 back. You do not have to have children to claim it, though having dependents increases the amount. The IRS has a tool on its website to see if you may have access to.

The Child Tax Credit is $2,000 per child under 17. If you have three children, that is $6,000 subtracted from your tax bill. Part of this credit is refundable, meaning if the credit is larger than the tax you owe, the IRS sends you the difference. The credit phases out at higher income levels, so check the current limits on the IRS website.

Other credits worth investigating: the American Opportunity Tax Credit (up to $2,500 for education expenses), the Lifetime Learning Credit (up to $2,000), the Saver's Credit (for retirement contributions if you earn under $68,000), and the Dependent Care Credit (for childcare expenses). Each has different income limits and requirements.

Deductions that lower your taxable income

Everyone gets the standard deduction automatically—$13,850 for single filers and $27,700 for married filing jointly in 2024 (these amounts change yearly). This is the amount of income the IRS does not tax. If you have deductions that add up to more than the standard deduction, you can itemize instead, which means listing them on Schedule A.

Common itemized deductions include mortgage interest (not the principal), property taxes (capped at $10,000), state and local income taxes (also capped at $10,000), charitable donations, and medical expenses over 7.5% of your income. If you own a home, paid significant property taxes, or donated substantially to charity, itemizing might save you thousands. Use a worksheet or tax software to add up your deductions and compare the total to the standard deduction.

If you are self-employed or have a side business, you can deduct business expenses: home office space (either $5 per square foot or actual expenses), equipment and supplies, mileage (67.5 cents per mile in 2024), internet and phone bills, and professional services. These deductions are often overlooked by people who treat side income as pure profit.

Adjusting your withholding for next year

Your refund size is partly determined by how much tax your employer withholds from each paycheck. If you want a larger refund next year, you can claim more allowances on your W-4 form, which tells your employer to withhold less. This puts more money in your pocket each month but reduces your refund when you file.

The opposite is also true: if you want a larger refund and do not mind smaller paychecks, you can claim fewer allowances to increase withholding. Some people do this intentionally, treating a tax refund as forced savings. The IRS W-4 calculator on its website helps you figure out the right number of allowances based on your situation.

Changing your W-4 takes effect on your next paycheck. You do not need your employer's permission; you simply fill out a new form and give it to payroll. If you have a major life change—marriage, a second job, a child born—that is a good time to revisit your withholding.

Income sources that come with overlooked deductions

If you have income beyond a W-2 job, you likely have deductions you are not claiming. Freelancers, contractors, rental property owners, and people who sell items online can deduct ordinary and necessary business expenses. The key word is ordinary—the expense has to be normal for your type of work.

For a home-based business, you can deduct a portion of rent or mortgage interest, utilities, internet, insurance, and repairs based on the percentage of your home used for work. If your home office is 200 square feet and your home is 2,000 square feet, you can deduct 10% of these expenses. Alternatively, you can use the simplified method: $5 per square foot of office space, up to 300 square feet ($1,500 maximum).

Mileage for business purposes is deductible at the IRS rate (67.5 cents per mile in 2024). If you drive to client meetings, job sites, or to pick up supplies, keep a log or use a mileage tracking app. Vehicle expenses, professional development, subscriptions, software, and tools are all deductible. Many self-employed people underestimate these deductions because they do not track them throughout the year.

Dependent and family-related credits and deductions

Each dependent you claim reduces your taxable income by $4,700 (in 2024) and may unlock additional credits. A dependent is usually a child under 17, but can also be an adult child, parent, or other relative if they live with you, you provide more than half their support, and they meet citizenship requirements. The IRS has a dependent test tool on its website.

Beyond the Child Tax Credit, dependents can open access to the Credit for Other Dependents ($500 per dependent who does not may have access to for the Child Tax Credit), the Dependent Care Credit (if you pay for childcare so you can work), and the Head of Household filing status (which has lower tax brackets than single filers). If you support a parent or adult child, do not assume you cannot claim them—run through the IRS checklist.

Retirement contributions that reduce your tax bill

Contributions to a traditional IRA or SEP-IRA reduce your taxable income dollar-for-dollar. If you earned $50,000 and contributed $7,000 to a traditional IRA, your taxable income drops to $43,000. The contribution limits vary by account type and income level, but the basic principle is the same: money you put into retirement accounts now lowers your tax bill this year.

If you are self-employed, a SEP-IRA or Solo 401(k) lets you contribute a much larger amount than a regular IRA—up to 25% of your net self-employment income or $69,000 in 2024. If you have a W-2 job and also freelance, you can contribute to both an employer plan and an IRA in the same year. The key is making the contribution before you file your tax return (or by the tax filing deadline if you file an extension).

Frequently Asked Questions

Can I claim a deduction for something I already claimed as a credit?

No. If you claim the American Opportunity Tax Credit for education expenses, you cannot also deduct those same expenses as a deduction. The IRS requires you to choose one or the other. However, you can claim a credit for some education expenses and a deduction for others if they are different expenses.

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

You can file an amended return using Form 1040-X within three years of the original filing date. This allows you to claim deductions or credits you missed. If the amendment results in a larger refund, the IRS will send it to you; if it results in more tax owed, you will receive a bill.

Does a larger refund mean I am doing something wrong?

Not necessarily. A large refund means you overpaid tax during the year, which is common if you have multiple jobs, irregular income, or significant deductions. Some people prefer this because it ensures they do not owe money at tax time. Others adjust their withholding to avoid overpaying.

How do I know if I should itemize or take the standard deduction?

Add up all your potential itemized deductions (mortgage interest, property taxes, charitable donations, medical expenses, state and local taxes). If the total exceeds the standard deduction for your filing status, itemize. If not, take the standard deduction. Tax software usually calculates both and shows you which is larger.