The "set aside 30%" rule exists because self-employed workers owe two types of federal tax that W-2 employees don't think about: income tax (which W-2 workers also pay, but have withheld automatically) and self-employment tax (the 15.3% covering Social Security and Medicare that an employer would normally split with you). Together, these can easily reach 25–35% of net earnings depending on your income level and state.
Federal tax breakdown by income level
The table below shows the approximate effective federal tax rate for a single sole proprietor taking the standard deduction and no other credits. "Effective rate" means total federal tax divided by net Schedule C income — the actual percentage of your earnings going to the IRS.
| Net SE income | SE tax | Federal income tax | Total federal | Effective rate |
|---|---|---|---|---|
| $25,000 | $3,532 | $514 | $4,046 | 16.2% |
| $40,000 | $5,652 | $1,714 | $7,366 | 18.4% |
| $60,000 | $8,478 | $4,018 | $12,496 | 20.8% |
| $80,000 | $11,304 | $6,978 | $18,282 | 22.9% |
| $100,000 | $14,130 | $10,294 | $24,424 | 24.4% |
| $150,000 | $20,198 | $20,879 | $41,077 | 27.4% |
These rates assume the standard deduction only and no QBI deduction. In reality, most freelancers can lower their effective rate significantly through business deductions and the 20% QBI deduction. But for the purpose of deciding how much to set aside, it's safer to use the higher number and get a refund than to undershoot and scramble.
Now add your state tax
Nine states have no income tax. If you live in one of them, the federal rates above are your total. Everyone else needs to add their state's marginal rate.
| State | Top marginal rate | Set aside (federal + state) |
|---|---|---|
| California | 13.3% | 30–38% |
| New York | 10.9% (+ NYC 3.876%) | 30–39% |
| New Jersey | 10.75% | 30–36% |
| Oregon | 9.9% | 29–35% |
| Minnesota | 9.85% | 29–35% |
| Illinois | 4.95% (flat) | 25–30% |
| Ohio | 3.5% | 24–29% |
| Pennsylvania | 3.07% (flat) | 23–28% |
| Texas, Florida, Nevada, WA, WY, SD, AK, TN, NH | 0% | 20–27% |
At $60,000 net income in Ohio: 20.8% federal + 3.5% state + 2.7% buffer = 27% of every payment. At $60,000 in California: 20.8% + ~8% (effective state) + 2% buffer = 31%.
How deductions lower your actual percentage
The percentages above are based on gross net income — before business deductions. Every deduction reduces the income your taxes are calculated on, which lowers the effective percentage you actually owe.
| Scenario | Gross income | Deductions | Net taxable | Effective rate on gross |
|---|---|---|---|---|
| No deductions | $70,000 | $0 | $70,000 | 21.8% |
| $10,000 in deductions | $70,000 | $10,000 | $60,000 | 17.8% |
| $20,000 in deductions | $70,000 | $20,000 | $50,000 | 14.7% |
A freelancer earning $70,000 gross who claims $20,000 in legitimate deductions (home office, mileage, equipment, software, health insurance) pays an effective federal rate of roughly 14.7% on gross income — compared to 21.8% with no deductions. That's a $5,000 difference. Add the QBI deduction and the gap widens further.
This is why we recommend setting aside 25–30% but tracking deductions aggressively throughout the year. The extra money in your tax savings account becomes a bonus when your actual bill comes in lower than the set-aside amount.
The system that works: auto-transfer on every payment
The single most effective habit is to transfer your set-aside percentage to a separate savings account the same day you get paid. Every deposit, every payment, every invoice. No exceptions.
- Open a separate high-yield savings account — use a different bank than your business checking so you're not tempted. Ally, Marcus, or Wealthfront all work. The interest you earn is a small bonus.
- Pick your percentage — use the tables above. When in doubt, round up to 30%.
- Transfer immediately — client pays you $3,000? Transfer $900 to your tax account before spending a dollar. Many banks let you set up automatic percentage-based transfers.
- Pay quarterly from this account — when the quarterly due date arrives, the money is already sitting there. No stress, no scrambling, no borrowing.
Some freelancer-specific banking tools automate this entirely. Found, for example, automatically sets aside a configurable tax percentage every time a deposit hits your account.
What if you also have W-2 income?
If you have a day job with tax withholding and freelance on the side, your W-2 withholding covers some of your tax liability. You may be able to set aside a lower percentage on freelance income — or increase your W-2 withholding (via Form W-4) to cover the freelance tax and skip quarterly payments entirely.
The test: will your total withholding cover at least 100% of last year's total tax (110% if AGI exceeded $150,000)? If yes, you're safe from underpayment penalties regardless of your freelance income. Adjust your W-4 at your employer and use the IRS Tax Withholding Estimator at irs.gov to dial in the right amount.
The cost of guessing wrong
Setting aside too much: you get a refund. Setting aside too little: you owe a lump sum at tax time plus possible underpayment penalties of 7–8% annualized on the shortfall. The asymmetry is clear — it's always better to over-save than under-save. A refund is cash you planned to spend anyway, just delayed. An unexpected bill can mean credit card debt or a payment plan with the IRS.