What is Income Tax?
Income tax is money you pay to the federal and state government on your earnings. Learn how income tax works for freelancers, what brackets apply, and how to plan for your tax obligations.
What Is Income Tax?
Income tax is a mandatory charge imposed by federal and state governments on all income earned by individuals and businesses. In the United States, income tax is the primary source of government revenue and is based on a progressive tax system — meaning income is taxed at increasing rates as it rises, with different portions of income falling into different tax brackets. For freelancers and independent contractors, income tax is a significant financial consideration because unlike employees — who have taxes automatically withheld from each paycheck — self-employed individuals must estimate and pay their income tax quarterly throughout the year. Schema DefinedTerm: Income tax — a government-imposed charge on individual or business income, calculated as a percentage of earnings above certain thresholds (brackets), collected by the IRS (federal) and state tax authorities; for freelancers, paid quarterly through estimated tax payments rather than through employer withholding.
How Income Tax Works: The Progressive Bracket System
The United States uses a progressive income tax system, which means income is taxed in layers — each portion of income is taxed at its own rate based on which bracket it falls into. Important: Being in a higher tax bracket doesn't mean your entire income is taxed at that rate. Only the income above each threshold is taxed at the higher rate. 2026 Federal Tax Brackets (Single Filer) | Tax Rate | Income Threshold | |---|---| | 10% | $0 – $11,600 | | 12% | $11,601 – $47,150 | | 22% | $47,151 – $100,525 | | 24% | $100,526 – $191,950 | | 32% | $191,951 – $243,725 | | 35% | $243,726 – $609,350 | | 37% | Over $609,350 | Example: A single freelancer with $90,000 in net income pays: - 10% on the first $11,600 = $1,160 - 12% on $11,601–$47,150 = $4,266 - 22% on $47,151–$90,000 = $9,427 - Total federal income tax: ~$14,853 (effective rate: 16.5%) Not 22% on the entire $90,000. Only the portion above $47,150 is taxed at 22%.
Self-Employment Tax vs. Income Tax
This is where freelancers often get confused — there are two separate taxes on your freelance income: 1. Self-Employment Tax (15.3%) Self-employment tax covers Social Security (12.4%) and Medicare (2.9%) — the programs that fund retirement and disability benefits. Employees split this cost with their employer, each paying half. As a freelancer, you pay the full amount yourself. Calculation: > Net self-employment earnings × 92.35% × 15.3% On $90,000 net earnings: $90,000 × 92.35% × 15.3% = $12,727 2. Income Tax (10–37%) Income tax is calculated on your net profit after deducting business expenses. It uses the progressive bracket system shown above. The SE Tax Deduction The IRS allows you to deduct half of your self-employment tax from your income for income tax calculation purposes. This partially compensates for the fact that freelancers pay both the employer and employee portions of Social Security and Medicare. On $90,000: The half-SE-tax deduction is $6,364, reducing taxable income from $90,000 to $83,636.
Quarterly Estimated Tax Payments: The Freelancer's Responsibility
Since no employer withholds income tax from a freelancer's earnings, the IRS requires freelancers to make quarterly estimated tax payments if they expect to owe more than $1,000 in taxes for the year. Due dates: - Q1 (Jan–Mar): Due April 15 - Q2 (Apr–May): Due June 15 - Q3 (Jun–Aug): Due September 15 - Q4 (Sep–Dec): Due January 15 (of the following year) How much to pay: A common safe harbor rule is to pay 100% of last year's tax liability divided by four, or 90% of this year's expected liability — whichever is smaller. Penalty for underpayment: If you underpay, the IRS charges interest on the underpayment amount from the due date of each installment. The current interest rate is around 8% annually — a costly penalty. The Safe Harbor Rule If you paid at least 100% of last year's total tax liability (or 110% if your AGI was over $150,000) in quarterly installments, you're protected from underpayment penalties even if your actual tax liability ends up higher.
State Income Tax for Freelancers
Most states impose their own income tax on top of federal income tax. State income tax rates range from 0% (no income tax states: Texas, Florida, Nevada, Washington, Wyoming, Alaska, South Dakota, Tennessee, New Hampshire) to over 13% (California). State tax matters for freelancers because: - Relocating to a no-income-tax state can save you thousands annually - Some states have different rules for business expense deductions - States have different filing thresholds and requirements
Tax Planning Strategies for Freelancers
1. Set Aside 25-30% of Every Invoice The single most important tax habit for freelancers. For every $5,000 invoice, set aside $1,250–$1,500 in a dedicated tax savings account. Don't touch it until tax season. 2. Make Quarterly Payments Calculate your quarterly payment based on year-to-date earnings. If Q1 is looking good, increase your Q2 payment to avoid a large bill at year-end. 3. Time Your Deductions If you're in a high-tax year, consider pre-paying some deductible expenses (equipment, insurance renewals) in December to reduce this year's tax bill. Conversely, if you expect higher income next year, defer some expenses to that year. 4. Contribute to Retirement Accounts Retirement contributions (SEP-IRA, Solo 401(k), SIMPLE IRA) reduce your taxable income while saving for your future. A $14,000 SEP-IRA contribution reduces your tax bill by $3,000–$5,000 depending on your bracket. 5. Track Everything Year-Round Don't wait until January to scramble for receipts. Track income and expenses in real time throughout the year so there are no surprises at tax time.
Related Terms
- Self-Employment Tax — the Social Security and Medicare tax freelancers pay - Gross Income — income before deductions - Deduction — expenses that reduce taxable income - Quarterly Estimated Taxes — quarterly tax payments - Schedule C — the tax form freelancers use to report income
Related Templates
Quarterly Tax Calculator Estimate your quarterly income tax payments accurately to avoid penalties. View Template → Invoice Template Track all client payments to forecast annual income for tax planning. View Template → Expense Tracker Organize deductions year-round to reduce your annual tax bill. View Template →
Related Guides
Complete 1099 Freelancer Tax Guide 2026 Everything freelancers need to know about federal and state income tax obligations. Read Guide → Freelancer Tax Guide 2026 Tax planning strategies and how to reduce your income tax as a freelancer. Read Guide → Key Takeaways: 1. Income tax is progressive — only income above each bracket threshold is taxed at the higher rate 2. Freelancers pay both income tax (10-37%) and self-employment tax (15.3%) on net earnings 3. Set aside 25-30% of every payment for taxes — don't spend money you don't have 4. Make quarterly estimated tax payments to avoid IRS penalties 5. Eonebill helps you track income, estimate taxes, and organize deductions year-round — start free Stop scrambling at tax time — track your freelance income with Eonebill. Start free → View Pricing → | Glossary Home → | Home →