California Self-Employment Tax Calculator — 2026

Calculate your self-employment tax liability including Social Security and Medicare contributions. Free calculator with California-specific rates.

Quick California Tax Estimate

Based on California's tax rates for 2026. Enter your details for a personalized calculation.

State Tax on $80K Profit
$1,069.78
SE Tax
$11,303.64
Effective Rate
21.5%
Marginal Rate
12%
Full California Tax Calculator →

California Tax Information

State Income TaxYes
Top Marginal Rate13%
Sales Tax0%
LLC Filing Fee$0
Annual Report Fee$None
Standard DeductionN/A

Self-employed pay both federal and California state tax.

California Income Tax Brackets (2026)

Tax RateFromTo
1%$0$11,079
2%$11,079$26,264
4%$26,264$41,452
6%$41,452$57,542
8%$57,542$72,724
9.3%$72,724$371,479
10.3%$371,479$445,771
11.3%$445,771$742,953
12.3%$742,953$1,000,000
13.3%$1,000,000No limit

California Quarterly Tax Deadlines

Q1
Apr 15
Q2
Jun 16
Q3
Sep 15
Q4
Jan 15

Frequently Asked Questions

What is the self-employment tax rate in California?
Self-employment tax has two parts: 12.4% Social Security tax and 2.9% Medicare tax, totaling 15.3% federally. California's state income tax (if applicable) is additional. Use our calculator above for your personalized rate.
Do I need to pay estimated taxes in California?
Yes. If you expect to owe $1,000 or more in taxes, the IRS requires quarterly estimated tax payments. California may have its own threshold. Our quarterly tax calculator helps you determine exact amounts.
What deductions can I claim as self-employed in California?
Common deductions include home office ($5/sq ft), health insurance premiums (100%), retirement contributions (SEP IRA up to $69,000), business equipment, vehicle expenses, and professional services. Use our deduction checklist for the full list.
How does a 1099 work in California?
If you earn $600+ from a client, they should issue Form 1099-NEC. You're responsible for reporting all income and paying self-employment tax on your net profit, regardless of whether you receive a 1099.
Should I form an LLC in California for tax savings?
An LLC alone doesn't change your tax rate — you still pay the same self-employment tax. However, electing S-Corp status can save thousands if your net profit exceeds $60,000-80,000. Use our business structure optimizer to compare.