Best Free Tax Calculators Online (2025)
Estimate income tax, self-employment tax, capital gains, and more with free online tax calculators built for individuals and small businesses.
Guide Overview
Tax season does not have to mean expensive software or surprise bills. Whether you are a W-2 employee checking your withholding, a freelancer estimating quarterly payments, or a small-business owner comparing entity structures, the right calculator gives you clarity in minutes. Below you will find free, no-sign-up tax tools that cover every common scenario.
Focus: free online tax calculators for individuals, freelancers, small business owners
Why You Need More Than One Tax Calculator
Your total tax liability is rarely a single number. Federal income tax, self-employment tax, state tax, and capital gains tax each follow different rules and rates. Using a dedicated calculator for each component lets you see exactly where your money goes and where you can save. A freelancer earning $80,000, for example, owes roughly $11,300 in self-employment tax alone before income tax even enters the picture. Understanding each layer helps you plan estimated payments and avoid underpayment penalties.
Quarterly Tax Estimation for Freelancers and Contractors
If you expect to owe $1,000 or more when you file, tax authorities require quarterly estimated payments. Missing a deadline triggers penalties that compound each quarter. Our quarterly tax calculator takes your projected annual income, subtracts deductions you expect to claim, and divides the result into four equal voucher amounts. It also shows the exact due dates so you never miss the April, June, September, or January deadlines. Pair it with the self-employment tax calculator to see the combined Social Security and Medicare portion.
Choosing the Right Business Structure for Tax Savings
The LLC vs. S-Corp decision is one of the highest-impact tax choices a small-business owner can make. An S-Corp election lets you split income between salary and distributions, potentially saving thousands in self-employment tax. However, reasonable compensation rules, payroll overhead, and state-level fees can erode those savings for lower-revenue businesses. Our comparison tool models both structures side by side so you can see the crossover point for your specific revenue and expense profile.
Maximizing Deductions You Might Be Missing
The home office deduction alone can shave hundreds or thousands off your tax bill if you use a dedicated space regularly and exclusively for business. The QBI deduction offers an additional 20 percent write-off for qualifying pass-through income. Many taxpayers leave money on the table simply because they do not realize they qualify. Run both calculators with your actual numbers to see the combined impact before you finalize your return.
Capital Gains and Property Tax Planning
Selling stocks, real estate, or other assets introduces capital gains tax that varies dramatically based on your holding period and income level. Short-term gains are taxed as ordinary income, while long-term gains enjoy preferential rates of 0, 15, or 20 percent. Our capital gains calculator shows the difference so you can time sales strategically. Meanwhile, the property tax estimator helps homeowners and real estate investors budget for annual assessments that vary widely by county and state.
Tools in This Guide
Use these tools in sequence based on your workflow needs.
US Self-Employment Tax Calculator
Calculate your US self-employment tax (Social Security + Medicare) based on your net earnings, including the 92.35% taxable base and deductible half.
Use tool →US Income Tax Estimator
Estimate your income tax using current tax brackets and deduction values.. Free online, browser-based tool with instant results and no signup.
Use tool →US Quarterly Tax Payment Calculator
Calculate your estimated quarterly tax payments to avoid underpayment penalties. Perfect for freelancers and small business owners.
Use tool →US Sales Tax Calculator
Calculate sales tax by state and local rate. Covers multiple tax jurisdictions and rates.
Use tool →US Property Tax Estimator
Estimate your annual property tax based on home value, state, assessment ratio, and homestead exemption.
Use tool →US Home Office Deduction Calculator
Estimate your home office deduction using simplified and actual expense methods for side businesses and self-employment.
Use tool →LLC vs S-Corp Tax Comparison
Compare estimated tax outcomes across LLC, S-Corp, and sole proprietor structures using your projected income.
Use tool →US Capital Gains Tax Calculator
Estimate short-term and long-term capital gains tax based on holding period, basis, and filing status.
Use tool →US Tax Bracket Calculator
Estimate effective and marginal tax rates by income level and filing status.. Free online, browser-based tool with instant results and no signup.
Use tool →QBI Deduction Calculator
Estimate qualified business income deduction with income thresholds, filing status, and business type inputs.
Use tool →Frequently Asked Questions
Are these tax calculators accurate enough to file with?
Do I need to create an account to use the tax calculators?
How often are the tax brackets and rates updated?
Can I use these calculators for state taxes?
What is the QBI deduction and do I qualify?
Last updated: June 1, 2025