2026 Quarterly Tax Estimator

Calculate your 2026 quarterly estimated tax payments for any combination of income types: W-2 employment, 1099 freelance, investment, rental, and business income. Includes self-employment tax, FICA, federal & state income tax, safe harbor analysis, and penalty warnings for all 50 states. Free alternative to Keeper Tax ($16/mo).

Income Sources (2026)

Total Gross Income$80,000

Deductions

Business Deductions (reduce taxable income)

$5/sq ft x 300 sq ft max

$0.70/mile for 2026

Annual premiums

Annual contribution

Software, equipment, etc.

Safe Harbor (Avoid Penalties)

Enter last year's tax info to calculate your safe harbor amount and check for penalty risk.

2026 Quarterly Payment

$5,203

$20,811 total annual tax

Tax Rates

Marginal Rate

22.0%

Tax on your next dollar

Effective Rate

26.0%

Actual % of income paid

Your marginal rate is the bracket your top dollar falls in. Your effective rate is what you actually pay overall -- always lower because lower brackets are taxed at lower rates.

Quarterly Payment Schedule
Tax Composition

2026 Payment Due Dates

Q1(Jan 1 - Mar 31)

$5,203

Due April 15, 2026

Q2(Apr 1 - May 31)

$5,203

Due June 16, 2026

Q3(Jun 1 - Aug 31)

$5,203

Due September 15, 2026

Q4(Sep 1 - Dec 31)

$5,203

Due January 15, 2027

Detailed Breakdown

Gross Income$80,000
1099 / Freelance$80,000
Total Deductions-$22,552
Federal Taxable Income$57,448
Self-Employment Tax$11,304
Social Security (12.4%)$9,161
Medicare (2.9%)$2,143
Deductible Half-$5,652
Federal Income Tax (22.0% marginal)$7,440
California Income Tax$2,068
Total Annual Tax$20,811

What This Means

→Set aside $5,203 before each quarterly due date. Many freelancers open a separate savings account and auto-transfer 25-30% of each payment received.
→You have no retirement contributions. A SEP-IRA lets you deduct up to 25% of net SE income (max $69,000). At your 22.0% marginal rate, maxing out could save thousands.

This calculator provides estimates for the 2026 tax year and is not tax advice. Tax rates reflect TCJA-extended brackets with inflation adjustments. SS wage cap: $174,900. Quarterly due dates: Apr 15, Jun 16, Sep 15, Jan 15. Consult a qualified tax professional for your specific situation.

Frequently Asked Questions

How is self-employment tax calculated for 2026?

Self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) applied to 92.35% of your net self-employment earnings. For 2026, Social Security tax applies to the first $174,900 of combined W-2 and SE earnings. An additional 0.9% Medicare tax applies to earnings above $200,000 (single) or $250,000 (married filing jointly). Half of SE tax is deductible from your income.

When are 2026 quarterly tax payments due?

Q1 (Jan-Mar): April 15, 2026 | Q2 (Apr-May): June 16, 2026 | Q3 (Jun-Aug): September 15, 2026 | Q4 (Sep-Dec): January 15, 2027. If a due date falls on a weekend or holiday, the deadline moves to the next business day.

What is the safe harbor rule for estimated taxes?

To avoid underpayment penalties, you must pay at least the lesser of: 90% of your current year tax liability, or 100% of your prior year tax (110% if your prior year AGI exceeded $150,000, or $75,000 if married filing separately). This calculator shows you the minimum quarterly payment needed to meet safe harbor.

What are the 2026 federal tax brackets?

For 2026 (TCJA extended), the federal brackets for single filers are: 10% up to $12,200, 12% up to $49,550, 22% up to $105,750, 24% up to $201,750, 32% up to $256,200, 35% up to $641,050, and 37% above that. The standard deduction is $15,400 (single) or $30,800 (married filing jointly).

What deductions can freelancers claim?

Common freelancer deductions include: home office (simplified method: $5/sq ft up to 300 sq ft), business mileage ($0.70/mile for 2026), health insurance premiums, retirement contributions (SEP-IRA up to 25% of net SE income, max $69,000; Solo 401k), equipment and software, professional development, and half of your self-employment tax.