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//// Tax · California

California 1099 Quarterly Tax

SE income → SE tax + federal + CA progressive tax → quarterly estimated payment.

Where this fits

🧾 TaxTax StackGoing 1099Freelancers

This tool lives inside Tax Stack + Going 1099 and is most useful for freelancers.

401(k) Limit 2024$23,000
Roth IRA Limit$7,000
S&P 500 Avg Return~10%/yr

Income

Quarterly payment
$7,182
estimated
Annual tax
$28,726
SE + federal + state
Safe harbor
$5,500
prior year ÷ 4
Effective rate
29.9%
of net SE income

Tax breakdown

Self-employment tax$13,564
Federal income tax$11,469
California state tax$3,693
Total annual$28,726
Per quarter$7,182
Per month (set aside)$2,394
1

Net self-employment income

netSE = gross − expenses

= $120,000 − $24,000

= $96,000

2

Self-employment tax (Schedule SE)

SE base = netSE × 92.35%; SE tax = base × 15.3%

= $13,564

SE tax = Social Security (12.4%) + Medicare (2.9%)

3

Adjusted gross income

AGI = netSE − (SE tax × 50%)

= $96,000 − $6,782

= $89,218

The 50% SE deduction compensates for the employer half of FICA

4

Federal income tax

federal = brackets(AGI − standard deduction)

= brackets($89,218 − $14,600)

= $11,469

Taxable income: $74,618 · Standard deduction: $14,600

5

California state tax

= $3,693

California uses progressive brackets. 1% SDI also applies.

6

Quarterly payment

quarterly = totalAnnualTax ÷ 4

= $28,726 ÷ 4

= $7,182

IRS Form 1040-ES due: April 15, June 15, September 15, January 15

Key insight

California uses progressive brackets. 1% SDI also applies. Pay quarterly by: April 15 (Q1), June 15 (Q2), September 15 (Q3), January 15 (Q4). Underpaying triggers a penalty (~8% annualized on the shortfall). When in doubt, pay the safe harbor amount.

Use this result in →

📅Quarterly Tax Calculator💸Self-Employment Tax

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