Tax Guard Calculator

How much should you set aside from every freelance payment?

Most financial advice tells freelancers to "save 25–30% for taxes" — and then leaves it at that. The problem is that number lives in your head but not in your bank account. The discipline that actually works is simpler: every time a payment hits, immediately move a fixed dollar amount into a dedicated tax savings account before you do anything else.

This is the "pay your taxes first" system, and it's the single habit that separates freelancers who scramble at tax time from those who write the check without stress. The exact percentage that's right for you depends on your income level, filing status, state, and whether you're fully self-employed — which is exactly what the calculator above computes.

A few guidelines that hold for most situations: if you're self-employed and earn above $50,000 per year, plan on reserving at least 30% of each payment. If you're in California, New York, New Jersey, or Oregon, bump that to 35–40%. If you're a W-2 employee receiving occasional 1099 side income, 20–25% is often sufficient since your employer already handles half of your FICA taxes.

Why the marginal rate matters (not the average)

Here's the mistake many freelancers make: they look at last year's effective tax rate — say, 18% — and set that aside from every new payment. The problem is that freelance income is almost always your highest-dollar income. It sits on top of your W-2 wages, investment income, or prior freelance earnings, which means it's taxed at your highest bracket, not your average one.

If you earn $60,000 from a day job and then invoice a client for $5,000, that $5,000 is entirely in the 22% federal bracket (plus any state and SE obligations). Your overall effective rate might be 14%, but every dollar of that $5,000 freelance payment is taxed at 22% federal, plus SE tax on top. Setting aside 14% means you'll come up short.

Always reserve based on your marginal rate — the rate at which the next dollar you earn is taxed. The Tax Guard Calculator uses your estimated annual income to identify your bracket and applies the marginal rate to each new payment, so the reserve amount is accurate rather than optimistic.

California freelancers: your rate is higher than you think

California imposes some of the highest state income taxes in the country, using a progressive bracket system that peaks at 13.3% for income over $1,000,000. But even at more common freelance income levels, the combined federal, state, and SE tax burden in California is significant.

Consider a single freelancer with $80,000 in annual self-employment income in California:

• SE tax: ~$11,304 (15.3% × 92.35% × $80,000)
• Federal income tax: ~$9,200 (22% marginal, after deductions)
• California state tax: ~$4,600 (effective rate ~5.75% on this income after CA standard deduction)
• Combined burden: ~$25,100 — roughly 31% of gross

And that's at $80,000. At $120,000, California's 9.3% bracket kicks in, pushing total combined effective rates toward 38–40%. Many California freelancers significantly underpay quarterly estimates because they're using national "set aside 25–30%" guidance that doesn't account for California's progressive brackets. The calculator above uses California's actual 2025 bracket thresholds to give you an accurate number.