As a rough starting point, put aside 25% to 35% of your net self-employment earnings for federal taxes. Where you land in that range depends on how much you make, your filing status, and whether you also have investment or rental income. If you live in a state with an income tax, add your state’s rate on top. The reliable move is to calculate your combined rate once against your own numbers, then treat that percentage like a fixed expense on every dollar of income that comes in.
Why You Have to Do This Yourself
A W-2 paycheck already has income tax, Social Security, and Medicare withheld before it reaches you, and that withholding usually keeps you close to even at tax time. Income without withholding is different. Freelancers, independent contractors, sole proprietors, landlords, and investors are responsible for sending those taxes to the IRS on their own schedule.
The IRS expects quarterly estimated tax payments if you’ll owe $1,000 or more in federal tax for the year after subtracting any withholding and refundable credits.1Internal Revenue Service. Form 1040-ES – Estimated Tax for Individuals That threshold catches most people with meaningful self-employment or investment income. If you also have a W-2 job, the tax withheld from that paycheck counts toward your total obligation, and you only need to make estimated payments to cover the gap.
What the Percentage Has to Cover
Two federal taxes are stacked inside that 25%–35% range: income tax and self-employment tax.
Income tax runs on a progressive bracket system. For 2026, a single filer pays 10% on the first $12,400, 12% up to $50,400, 22% up to $105,700, and 24% up to $201,775, with higher brackets above that. Married couples filing jointly get roughly double those thresholds. Before rates apply, you subtract the standard deduction, which for 2026 is $16,100 for single filers, $32,200 for joint filers, and $24,150 for head of household.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Because of that deduction, your effective income tax rate always ends up lower than your top bracket.
Self-employment tax is the piece that surprises people. A W-2 employer covers half of Social Security and Medicare. When you work for yourself, you owe both halves: 15.3% total, split between 12.4% for Social Security and 2.9% for Medicare. It applies to 92.35% of your net earnings rather than the full amount.3Internal Revenue Service. Topic No. 554, Self-Employment Tax The Social Security portion stops once your combined earnings reach $184,500 for 2026.4Social Security Administration. Contribution and Benefit Base Medicare’s 2.9% keeps applying to every dollar. You get to deduct half of the self-employment tax you pay when figuring adjusted gross income, which slightly softens your income tax bill.
Running Your Own Numbers
Generic percentages are a fine starting point. Doing the math on your own income is better. Here is what the calculation looks like for a single freelancer with $80,000 in net self-employment income in 2026.
Subtract the $16,100 standard deduction to get $63,900. The deductible half of self-employment tax knocks off another $5,650 or so, leaving roughly $58,250 in taxable income. Run that through the 2026 brackets: 10% on the first $12,400 is $1,240; 12% on the next $38,000 is $4,560; 22% on the remaining amount is about $1,727. Federal income tax comes to roughly $7,527.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
Now the self-employment tax: $80,000 × 92.35% × 15.3% is about $11,304. Total federal bill: roughly $18,831, or about 23.5% of the $80,000. That is why 25% is the low end of the range. Anyone earning more, or with significant investment income, will land higher.
When to Save More
Several situations push the savings rate above the 25%–35% baseline.
State income tax. Everything above is federal only. Eight states have no individual income tax; the rest have top marginal rates from 2.5% to 13.3%. Someone saving 30% for federal in a state with a 5% rate should be closer to 35%. Many states run their own quarterly estimated payment system on separate forms.
Additional Medicare Tax. An extra 0.9% Medicare tax applies to self-employment income and wages above $200,000 for single filers or $250,000 for joint filers.5Internal Revenue Service. Questions and Answers for the Additional Medicare Tax Combined with the regular 2.9%, that puts total Medicare at 3.8% on earnings above the threshold. Employers withhold it automatically on wages over $200,000; self-employed workers have to build it into their own numbers.6Internal Revenue Service. Topic No. 560, Additional Medicare Tax
Net Investment Income Tax. A separate 3.8% surtax hits net investment income — interest, dividends, capital gains, rental income, royalties — when modified adjusted gross income exceeds $200,000 single or $250,000 joint.7Internal Revenue Service. Topic No. 559, Net Investment Income Tax It applies to the lesser of your net investment income or the amount over the threshold.
Investment and rental income. Short-term capital gains, interest, and non-qualified dividends are taxed at ordinary rates, so save at your marginal bracket. Long-term capital gains and qualified dividends get preferential rates of 0%, 15%, or 20% depending on income.8Internal Revenue Service. Topic No. 409, Capital Gains and Losses Rental income is taxed at ordinary rates but only on net profit after expenses and depreciation, which usually leaves a much lower effective rate than the headline bracket.9Internal Revenue Service. Topic No. 414, Rental Income and Expenses A workable approach for landlords is to set aside a percentage of gross rents each month at roughly your marginal rate and treat any overage as a bonus once deductions are finalized.
What Brings Your Rate Down
Your savings target should be based on net income after legitimate business expenses, not gross revenue. A few deductions consistently move the needle.
Business expenses reduce both income tax and self-employment tax. Advertising, software, supplies, insurance, professional services, and contract labor all go on Schedule C. If you use part of your home regularly and exclusively for business, the simplified home office method is $5 per square foot up to 300 square feet ($1,500 max), or you can deduct a proportional share of actual home expenses. For business driving in 2026, the standard mileage rate is 72.5 cents per mile; the alternative is to track actual vehicle expenses and deduct the business-use share. A contemporaneous mileage log matters here because vehicle deductions are a frequent audit target.
Retirement contributions reduce current-year taxable income sharply. A Solo 401(k) allows up to $24,500 in employee deferrals for 2026, plus employer profit-sharing up to 25% of net self-employment earnings, with a combined cap of $72,000 for those under 50. Catch-up contributions add $8,000 for ages 50–59 and 64+, and $11,250 for ages 60–63. A SEP-IRA is simpler and allows up to 25% of net self-employment income. Self-employed workers can also deduct 100% of health insurance premiums for themselves and their dependents, provided they aren’t eligible for a spouse’s employer plan.
The Section 199A qualified business income deduction lets eligible self-employed workers and pass-through owners deduct up to 20% of qualified business income.10Internal Revenue Service. Qualified Business Income Deduction It applies to sole proprietorships, partnerships, S corporations, and single-member LLCs, and it was extended past its original 2025 expiration. The full deduction is available below certain income thresholds and phases out above roughly $200,000 single and $400,000 joint, where wage and property limits kick in. On $100,000 of net business income below the phase-out, this removes $20,000 from taxable income.
Paying It In: Quarterly Deadlines and Safe Harbor
Setting money aside is only half the job. The IRS wants it in installments during the year, not a lump sum in April. The 2026 estimated payment due dates are April 15, June 15, September 15, and January 15, 2027. Payments go in on Form 1040-ES through IRS Direct Pay, EFTPS, card, or your IRS Online Account.11Internal Revenue Service. Form 1040-ES – Estimated Tax for IndividualsPayments
Underpay and the IRS charges a penalty tied to the shortfall, its duration, and the quarterly federal interest rate, which runs 6% to 7% annually for the first half of 2026.12Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty13Internal Revenue Service. Quarterly Interest Rates Two safe harbors let you avoid it entirely. Payments and withholding equal to at least 90% of the current year’s total tax, or at least 100% of last year’s total tax, keep you penalty-free. If your prior-year AGI exceeded $150,000 ($75,000 if married filing separately), the prior-year threshold climbs to 110%.1Internal Revenue Service. Form 1040-ES – Estimated Tax for Individuals For growing incomes, matching the prior year’s number is usually the simpler target.
How to Actually Set the Money Aside
Knowing your percentage doesn’t help if the money gets spent. What works: open a separate savings account you treat as untouchable, and move your tax percentage over every time revenue lands. Automate the transfer if your bank supports it. The cash earns interest while it waits, and there’s no scramble in April.
Recalibrate quarterly. Project your annual income at the start of the year, set a rate against that projection, and revisit after each quarter closes. A strong Q1 followed by a slow Q2 will throw off the plan. Saving slightly more than you think you need is a simple hedge; any overpayment becomes a refund or rolls into the next quarterly payment.
Track business expenses as they happen instead of reconstructing them in April. Every deductible dollar you miss inflates both your taxable income and the number you set aside against. A basic bookkeeping app or spreadsheet with expense categories pays for itself, and it makes the quarterly estimate honest work rather than a guess.