Federal Income Tax Calculator

Your federal tax refund is not considered taxable income by the IRS. A refund is simply the government returning money that you overpaid throughout the year. 

However, if you received a state tax refund, the rules change. If you itemized deductions on your prior year’s federal return and deducted the state taxes you paid, that state refund might be taxable under the "tax benefit rule." If you took the standard deduction last year (as 90% of taxpayers do), your state refund is generally tax-free. 

You will receive Form 1099-G from your state if they report a refund that may need to be included in your federal gross income.

Filing an extension using Form 4868 gives you six additional months to submit your tax return, but it does not grant you more time to pay your tax bill. The IRS expects you to estimate your total tax liability and pay that amount by the April deadline. 

If you file the extension but fail to pay, you will be charged interest on the unpaid balance from the original due date until the date of payment. Additionally, a late-payment penalty may apply unless you have paid at least 90% of your total tax through withholding. Learn how to file a federal tax extension through FileTax.com.

When you contribute to a traditional 401(k) or 403(b), your contributions are pre-tax. That means the money comes out of your paycheck before federal and most state income taxes are calculated.

For example, if you earn $60,000 and contribute $5,000 to your 401(k), the IRS only taxes you on $55,000. This lowers your taxable income, which can reduce both the amount of tax you owe and, in some cases, your tax bracket.

For 2024, the standard contribution limit is $23,000.
For 2025, the standard limit rises to $23,500.

If you are age 50 or older, the IRS allows catch-up contributions. In 2025, this means you can contribute an additional $7,500, bringing your total allowed contribution to $31,000.

This makes retirement accounts one of the most powerful tax-reduction tools available, especially for higher-income and older workers who are trying to reduce their current tax bill while accelerating retirement savings.

Yes, the IRS requires you to report all earned income regardless of the amount or the method of payment. Whether you received a W-2, a 1099-NEC for freelance work, or cash for a side hustle, it must be included in your gross income. 

Even if you do not receive an official tax form from a client because you earned less than $600 from them, the income is still legally taxable. Failing to report cash income can lead to audits, back taxes, and significant penalties. 

Reporting this income also ensures you get credit toward Social Security benefits and can qualify for certain tax credits like the Earned Income Tax Credit (EITC).

The Retirement Savings Contributions Credit, or "Saver’s Credit," is a non-refundable tax credit designed to encourage low-to-moderate income earners to save for retirement. You may be eligible for a credit worth 10%, 20%, or 50% of your first $2,000 in retirement contributions ($4,000 if Married Filing Jointly). 

Eligibility depends on your Adjusted Gross Income (AGI). For 2024, the AGI limit for the credit is $76,500 for joint filers and $38,250 for singles. In 2025, these limits adjust for inflation, $79,000 for joint filers and $39,500 for singles. To claim it, you must be at least 18 years old, not a full-time student, and not claimed as a dependent on someone else's return.

You can claim a parent as a dependent even if they do not live with you, provided they meet the IRS "Qualifying Relative" criteria. First, you must provide more than half of their total financial support for the year. Second, their gross income for the year must be below the IRS limit ($5,200 in 2025). 

Social Security benefits are generally excluded from this income limit unless they have other significant income. Claiming a parent can qualify you for the $500 Credit for Other Dependents and may allow you to file as Head of Household, which offers a much higher standard deduction and better tax brackets.

Yes, you can deduct up to $2,500 of interest paid on qualified student loans each year. This is an "above-the-line" deduction, meaning you do not have to itemize your deductions to claim it—it directly reduces your Adjusted Gross Income (AGI). However, the deduction phases out at higher income levels. 

For 2024, the phase-out starts at $80,000 for single filers and $165,000 for joint filers. For 2025, these thresholds increase slightly to $85,000 and $170,000. You can claim this for loans used for yourself, your spouse, or dependents. Read our complete guide to student loan interest deductions.

Absolutely. To get an accurate estimate, you should enter the combined gross income of both spouses. When you select "Married Filing Jointly," the calculator applies the specific, wider tax brackets and the higher standard deduction ($29,200 for 2024; $31,500 for 2025) reserved for couples. 

It is often more beneficial for couples to file jointly than separately, as many credits—like the Child and Dependent Care Credit—are limited or unavailable to those filing separately. Our tool will show you the combined tax liability and help you determine if your combined withholdings are sufficient to cover your total bill.

A non-refundable tax credit can reduce your tax liability to zero, but it cannot result in a check being mailed to you for any excess. For example, if you owe $500 in taxes and have a $1,000 non-refundable credit, your tax bill becomes $0, but you lose the remaining $500. A refundable credit, however, is much more valuable. 

If you owe $500 and have a $1,000 refundable credit, the IRS will pay you the $500 difference as a refund. The Earned Income Tax Credit (EITC) is fully refundable, while the Child Tax Credit is partially refundable through the Additional Child Tax Credit (ACTC).

If our calculator indicates a "Tax Owed" result, you should consider adjusting your withholdings to avoid a large bill and potential underpayment penalties next year. To do this, you must submit a new Form W-4 to your employer. 

You can use the results from this tool to fill out Step 4(c) of the W-4, which allows you to request that a specific extra dollar amount be withheld from every paycheck. This is especially helpful if you have multiple jobs or side-hustle income where no tax is being withheld. Check out our comprehensive Form W-4 guide to determine the right withholding amount.

Yes, unemployment compensation is considered taxable income by the federal government and must be reported on your tax return. Unlike regular wages, taxes are not always automatically withheld from unemployment checks unless you specifically request it using Form W-4V. If you did not have taxes withheld, you might owe a significant amount when you file. 

You will receive Form 1099-G from your state’s unemployment office showing the total amount paid to you and any federal tax withheld. Some states do not tax unemployment income, but for your federal return, it is treated similarly to ordinary salary or wages.

Health Savings Account (HSA) contributions are "triple tax-advantaged": they are tax-deductible, grow tax-free, and withdrawals for medical expenses are tax-free. For 2024, the contribution limit is $4,150 for individuals and $8,300 for families. For 2025, the IRS has increased these limits to $4,300 for individuals and $8,550 for families. 

If you are 55 or older, you can contribute an additional $1,000 "catch-up" amount. Contributing to an HSA is one of the smartest ways to lower your taxable income because these contributions reduce your AGI dollar-for-dollar, even if you do not itemize your deductions.

Currently, under the Tax Cuts and Jobs Act, W-2 employees cannot deduct home office expenses on their federal tax returns, even if they are required to work from home by their employer. 

This deduction is strictly reserved for self-employed individuals, freelancers, and small business owners who use a portion of their home "regularly and exclusively" for business. If you are a 1099 contractor or business owner, you can deduct a portion of your rent, mortgage interest, utilities, and internet based on the square footage of your dedicated office space. Learn more about self-employment tax deductions.

Tax refunds fluctuate based on changes in your life and changes in the law. Common reasons for a smaller refund include a raise (which can push you into a higher bracket), a child "aging out" of the Child Tax Credit (turning 17), or a change in your filing status. 

Additionally, the IRS adjusts tax brackets and standard deductions annually for inflation. If your income stayed the same but the brackets widened, you might actually owe less tax, but if your employer's withholding tables also updated, your "overpayment" (the refund) might shrink. Using this calculator annually helps you spot these trends before they affect your bank account.