Federal Tax Calculator

Calculate total federal tax liability

Income & Status
Federal Tax Summary
Income Tax: $0
Self-Employment Tax: $0
Total Federal Tax: $0
Effective Rate: 0%

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What is Federal Tax?

Federal tax includes all taxes levied by the US federal government, primarily income tax on wages and investments, plus self-employment tax for independent contractors and business owners. Unlike state taxes that vary by location, federal taxes apply uniformly across all states. Understanding your total federal tax burden is essential for accurate financial planning and quarterly estimated tax payments.

This calculator provides a comprehensive view of your federal tax liability by combining income tax calculations with self-employment tax. This is particularly valuable for freelancers, gig workers, and small business owners who need to account for both the employee and employer portions of Social Security and Medicare taxes that are automatically withheld for W-2 employees.

How to Use This Calculator

Step 1: Select your filing status - determines tax brackets and standard deduction.
Step 2: Enter W-2 wage income from your job where taxes are withheld.
Step 3: Add 1099/self-employment income - freelance, side gig, or business income.
Step 4: Enter deductions - 401k, HSA, and other above-the-line deductions.
Step 5: Click "Calculate Federal Tax" to see total liability.
Step 6: Plan quarterly estimated payments if not withholding enough.

Examples

Example 1 - Employee Only: W-2: $80,000, 1099: $0, Deductions: $10,000. Income Tax: ~$10,500. SE Tax: $0. Total: ~$10,500. Effective rate: ~13%. Withholding likely covers this.

Example 2 - Mixed Income: W-2: $60,000, 1099: $30,000, Deductions: $10,000. Income Tax: ~$13,000. SE Tax: ~$4,200. Total: ~$17,200. Effective rate: ~19%. Need quarterly payments on 1099 income.

Example 3 - Full Self-Employed: W-2: $0, 1099: $100,000, Deductions: $15,000. Income Tax: ~$14,000. SE Tax: ~$12,200. Total: ~$26,200. Effective rate: ~26%. Must make quarterly estimated payments.

Who Should Use This Calculator?

  • Freelancers – Calculate both income and self-employment tax on 1099 income.
  • Side Gig Workers – Understand tax impact of additional income beyond W-2 job.
  • Small Business Owners – Plan for total federal tax including SE tax.
  • Tax Planners – Optimize retirement contributions and business expenses.
  • New Entrepreneurs – Learn about quarterly estimated tax requirements.

Pro Tips

  • Self-employment tax is 15.3% on 92.35% of net business income.
  • You can deduct half of SE tax from your income tax calculation.
  • Set aside 25-30% of 1099 income for taxes to avoid surprises.
  • Safe harbor: Pay 100% of prior year tax (110% if AGI >$150k) to avoid penalty.
  • Quarterly payments due: April 15, June 15, September 15, January 15.
  • Solo 401(k) or SEP IRA reduce both income tax and SE tax base.
  • QBI deduction (20% of qualified business income) available for pass-through entities.
  • Health insurance premiums deductible for self-employed above-the-line.

Frequently Asked Questions

What federal taxes do I need to pay?
Major federal taxes: Individual Income Tax (10-37% progressive rates on all income), Self-Employment Tax (15.3% on business income covering Social Security and Medicare), Additional Medicare Tax (0.9% on income over $200k/$250k), Net Investment Income Tax (3.8% for high earners), and Alternative Minimum Tax (AMT) for some high-income taxpayers. Most employees only pay income tax (withheld from paycheck), while self-employed pay both income and SE tax.
What is self-employment tax?
SE tax is 15.3% of 92.35% of net self-employment income, covering both employee and employer portions of Social Security (12.4%) and Medicare (2.9%). W-2 employees pay 7.65% and employers pay 7.65%. Self-employed individuals pay both portions since they are their own employer. The 92.35% adjustment accounts for the deductible employer portion.
How do I make federal tax payments?
Payment methods: IRS Direct Pay (free online bank transfer), EFTPS (Electronic Federal Tax Payment System), check with Form 1040-V voucher, or credit/debit card (fees apply). Quarterly estimated payments due April 15, June 15, September 15, and January 15. Safe harbor rules: Pay 90% of current year tax or 100% of prior year tax (110% if AGI over $150,000) to avoid underpayment penalties.
What is the Qualified Business Income deduction?
QBI deduction (Section 199A) allows deducting up to 20% of qualified business income from pass-through entities (sole proprietorships, partnerships, S-corps, LLCs). Limitations apply above $191,950 (single) / $383,900 (married) in taxable income based on W-2 wages and qualified property. Specified service businesses (doctors, lawyers, consultants) face additional restrictions.
What retirement plans can self-employed use?
SEP IRA: Contribute up to 25% of compensation, max $69,000 (2024). Simplest option. Solo 401(k): Employee deferral up to $23,000, employer contribution up to 25% of compensation, total max $69,000 or $76,500 if age 50+. Best for high earners. SIMPLE IRA: Up to $16,000 deferral plus employer match, good if you have employees.
How do I calculate quarterly estimated taxes?
Calculate steps: 1) Project annual income (W-2 + 1099). 2) Calculate expected tax using brackets plus SE tax. 3) Subtract deductions, credits, and any W-2 withholding. 4) Result is estimated tax due. 5) Divide by 4 for quarterly payments. Adjust quarterly if income changes significantly. Form 1040-ES worksheets help with calculations.
What is the difference between W-2 and 1099?
W-2 employees have taxes withheld by employers who pay half of Social Security/Medicare (7.65% each). 1099 contractors receive gross payments and must pay both portions (15.3% SE tax) plus income tax. W-2 workers receive benefits and legal protections; 1099 workers have more flexibility but higher tax complexity. Misclassification by employers can result in IRS penalties.