Estimate your quarterly taxes as a self-employed worker in San Diego for 2026, including self-employment tax, federal income tax, and California state income tax.
Last updated: May 2026 · Data: MIT Living Wage Calculator, C2ER, U.S. Census, BLS, IRS, state and city sources
San Diego freelancers pay federal self-employment tax, federal income tax, and California state income tax (1% to 12.3%). California has the highest top marginal income tax rate in the nation at 13.3% (including the 1% Mental Health Services Tax on income over $1 million). The $800 minimum franchise tax applies to all LLCs regardless of income.
| Tax Component | Rate / Detail (2026) |
|---|---|
| Self-Employment Tax | 15.3% on 92.35% of net profit |
| Social Security portion | 12.4% on first $176,100 |
| Medicare portion | 2.9% (no cap) |
| SE Tax Deduction | Deduct half of SE tax from income |
| Federal Standard Deduction (Single) | $15,000 |
| California State Income Tax | 1% to 12.3% |
| San Diego Local Income Tax | None |
| Quarterly Due Dates | April 15, June 16, September 15, January 15 |
San Diego pairs a major U.S. Navy and Marine Corps presence with a world-class biotech and life-sciences cluster, a busy tourism economy, and cross-border trade with Tijuana, all along one of the most desirable stretches of California coastline.
| Local Metric | San Diego (2026 estimate) |
|---|---|
| Metro population | 1.4 million |
| County / jurisdiction | San Diego County |
| Cost of living index (US avg = 100) | 143 |
| MIT living wage, single adult | $27.30/hour |
| MIT living wage, one earner supporting a family of four | $47.10/hour |
| Applicable minimum wage | $17.25/hour |
| Average rent, 1-bedroom | $2,400/month |
| Average rent, 2-bedroom | $3,100/month |
| Median home price | $1,010,000 |
| Median household income | $98,000/year |
| Combined sales tax rate | 7.75% |
| Effective property tax rate | 0.73% of value/year |
Local figures are 2026 estimates compiled from the MIT Living Wage Calculator, the C2ER Cost of Living Index, U.S. Census and Zillow housing data, and city and county sources. Verify current figures before relying on them.
If you expect to owe at least $1,000 in federal tax, you generally must pay quarterly. This covers freelancers, contractors, sole proprietors, and LLC members in San Diego. California also requires state estimated payments if you expect to owe $500 or more.
Federal estimated taxes are due April 15, June 16, September 15, and January 15. California uses the same federal schedule for its estimated payments.
A common rule is 25% to 35% of net profit. Because California adds state income tax (1% to 12.3%) on top of federal taxes, San Diego freelancers often set aside toward the higher end. Use the calculator above for your numbers.
The self-employment tax rate is 15.3% (12.4% Social Security up to $176,100 of net earnings, plus 2.9% Medicare with no cap). It applies to 92.35% of net profit, and half of it is deductible against income tax.
San Diego does not levy a local personal income tax. Your estimated payments cover federal taxes and California state income tax.