California Quarterly Tax Calculator
Calculate your estimated quarterly tax payments for federal and California state taxes. Designed for self-employed individuals, freelancers, and independent contractors.
CA State Tax: Progressive 1.0% - 12.3%
Quarterly Payment Amount
$6,457
Per quarter (4 remaining)
Annual Tax Breakdown
2026 Payment Schedule
Jan 1 - Mar 31
Due: April 15, 2026
$6,457
Apr 1 - May 31
Due: June 15, 2026
$6,457
Jun 1 - Aug 31
Due: September 15, 2026
$6,457
Sep 1 - Dec 31
Due: January 15, 2027
$6,457
Don't miss your quarterly payments!
The IRS may charge penalties and interest if you underpay or pay late. Consider setting up automatic payments or calendar reminders.
California Quarterly Tax Highlights
California has 9 tax brackets with rates from 1% to 12.3%
Highest marginal state tax rate in the US
Additional 1% Mental Health Services Tax on income over $1M
Use Form 540-ES for quarterly estimated payments
California Quarterly Tax FAQ
What is California's state income tax rate for self-employed?
California has a progressive income tax with 9 brackets ranging from 1% to 12.3%. Self-employed individuals pay the same rates on their net self-employment income. Income over $1 million is also subject to an additional 1% Mental Health Services Tax.
When are California quarterly taxes due?
California quarterly estimated tax payments are due April 15, June 15, September 15, and January 15. Use California Form 540-ES to make payments to the Franchise Tax Board.
Do I need to pay California estimated taxes?
You must make estimated tax payments if you expect to owe at least $500 in California taxes after withholding and credits. This commonly applies to self-employed individuals, freelancers, and independent contractors.
Official References
This calculator uses current federal and California tax rates and schedules:
- IRS Estimated Tax Guidelines
Federal quarterly tax requirements and Form 1040-ES
- California Franchise Tax Board
Official California tax authority
- California Estimated Tax Payments
Information about Form 540-ES and payment options
- IRS Self-Employment Tax
Federal self-employment tax information
- IRS Self-Employment Tax
Social Security and Medicare tax information
This calculator provides estimates based on 2026 tax rates. Your actual tax liability may vary based on deductions, credits, and other factors. Consult a tax professional for personalized advice.