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Self-Employment Tax: Estimate It and Build a Payment Plan
Freelancers, contractors, gig workers, and small-business owners may owe self-employment tax plus federal and state income tax. Learn what the 15.3% rate covers, estimate the basic amount, and reserve money from each payment before quarterly deadlines arrive.
How much is self-employment tax?
The basic federal self-employment tax rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare. It generally applies to 92.35% of net earnings from self-employment, not the total amount customers paid you. Federal income tax is calculated separately. Many workers need to reserve more than 15.3% of profit because their total payment may include both taxes.
Quarterly Tax Reserve Planner
Enter your business income, eligible expenses, and planning reserve rate. This estimates net profit, the basic self-employment tax amount, and an equal quarterly reserve.
- Net profit
- $40,000.00
- Basic self-employment tax estimate
- $5,651.82
- Annual planning reserve
- $10,000.00
- Equal quarterly reserve
- $2,500.00
Planning aid only. Income tax, credits, other income, filing status, Additional Medicare Tax, wage-base limits, and state tax can change the amount owed.
Download the example reserve estimator (CSV)
Build a Self-Employment Tax Paycheck
This two-minute visual walks through the basic self-employment tax estimate, a 25% planning reserve, and the 2026 estimated-payment dates.
Read the video transcript
- Give every payment three jobs. Set aside money for business costs, owner pay, and a tax reserve.
- Start with net profit. $50,000 of business income minus $10,000 of eligible expenses equals $40,000 net profit.
- Estimate net earnings. For this basic calculation, multiply $40,000 by 92.35%. The example becomes $36,940.
- Apply the basic 15.3% rate. The rate combines 12.4% Social Security and 2.9% Medicare, subject to applicable limits.
- Calculate basic self-employment tax. $36,940 times 15.3% equals $5,651.82. Income tax is separate and can increase the total payment.
- Handle the half-tax adjustment. $5,651.82 divided by two equals $2,825.91. This may reduce income; it is not a 50% tax refund.
- Build a planning reserve. A 25% reserve on $40,000 of net profit creates $10,000 for federal and possible state taxes.
- Do not stop at 15.3%. After basic self-employment tax, $4,348.18 remains in the $10,000 reserve for income and possible state tax. The remainder is not guaranteed to be enough.
- Split money when it clears. Move the tax share before business money starts looking like money available to spend.
- Mark the 2026 payment dates. April 15, June 15, September 15, and January 15, 2027. The four periods are not equal quarters, so check the current Form 1040-ES.
- Reforecast after big changes. Update the plan after a large contract, job change, marriage, business loss, or major credit change.
- Run the full-year check. Use Form 1040-ES, include household income and withholding, and save every payment confirmation.
What Self-Employment Tax Pays For
Social Security: 12.4%
This portion applies only up to the annual Social Security wage base after combining covered wages and self-employment earnings. The wage base changes over time.
Medicare: 2.9%
The basic Medicare portion does not stop at the Social Security wage base. A separate 0.9% Additional Medicare Tax may apply above filing-status thresholds.
The Basic Self-Employment Tax Formula
- Add business income received during the year.
- Subtract eligible ordinary and necessary business expenses to find estimated net profit.
- Multiply net profit by 92.35% to estimate net earnings subject to self-employment tax.
- Multiply that result by 15.3% for a basic estimate, subject to wage-base and Additional Medicare Tax rules.
- Estimate federal income tax separately, then account for credits and withholding.
Quick formula
Business income − eligible expenses = net profit
Net profit × 92.35% × 15.3% = basic self-employment tax estimate
This shortcut is most useful below the Social Security wage base when no wages or other special circumstances change the calculation.
If your customers paid you $20,000 and you had $5,000 of eligible expenses, start with the $15,000 net profit, not the $20,000 of deposits. Keep receipts and records that support both income and expenses.
How Much Should You Save From Each Payment?
A common planning range is 25% to 30% of net self-employment income, but that is not a universal tax rate. A person with a low taxable income and strong credits may need less. A person with higher income, state income tax, few deductions, or no withholding may need more.
| Starting reserve | When it may fit | What to check |
|---|---|---|
| 15% to 20% | Lower profit, credits, or enough tax withheld from a W-2 job | Confirm with Form 1040-ES or a tax professional |
| 25% to 30% | Practical starting range for many independent workers | Federal income tax, self-employment tax, and state tax |
| 30% or more | Higher marginal rate, state and local tax, or little outside withholding | Run a full-year projection instead of relying on a rule of thumb |
- Move the reserve when each customer payment clears.
- Use a separate savings account so tax money is not mixed with spending money.
- Base the transfer on profit if expenses are predictable; use a cautious percentage of gross receipts when they are not.
- Update the projection after a large contract, job change, marriage, business loss, or major credit change.
- Record each estimated payment and confirmation number.
Example: $50,000 of Income and $10,000 of Expenses
| Step | Calculation | Amount |
|---|---|---|
| Business income | Customer payments | $50,000.00 |
| Net profit | $50,000 − $10,000 expenses | $40,000.00 |
| Net earnings for basic SE tax estimate | $40,000 × 92.35% | $36,940.00 |
| Basic self-employment tax estimate | $36,940 × 15.3% | $5,651.82 |
| Deductible half of SE tax | $5,651.82 ÷ 2 | $2,825.91 |
The $2,825.91 adjustment can reduce adjusted gross income, but it does not erase half of the self-employment tax bill dollar for dollar. Federal income tax still depends on taxable income, filing status, deductions, credits, other income, and withholding.
A 25% reserve in this example
Saving 25% of the $40,000 net profit would create a $10,000 tax reserve. After the estimated $5,651.82 of basic self-employment tax, $4,348.18 would remain available for estimated federal income tax and, when applicable, state tax. That remaining amount is not guaranteed to cover the final bill. Run Form 1040-ES using the full household picture.
2026 Estimated Tax Due Dates
Individuals generally need estimated payments when they expect to owe at least $1,000 after subtracting withholding and refundable credits, subject to the IRS payment rules. The standard 2026 installment dates are:
| Payment | Income period commonly covered | Due date |
|---|---|---|
| First | January 1 through March 31 | April 15, 2026 |
| Second | April 1 through May 31 | June 15, 2026 |
| Third | June 1 through August 31 | September 15, 2026 |
| Fourth | September 1 through December 31 | January 15, 2027 |
The periods are not three equal calendar quarters. Weekend, holiday, fiscal-year, farming, fishing, disaster-relief, and annualized-income rules can change timing or calculations. Check the current Form 1040-ES before paying.
Pay quarterly
Use IRS Direct Pay, an IRS online account, EFTPS, or another accepted method. Save the date, amount, tax year, and confirmation number.
Increase W-2 withholding
If you or a spouse also receives wages, extra withholding on Form W-4 may cover part or all of the expected tax. Withholding is generally treated as paid evenly through the year for penalty calculations.
What Records Should You Keep?
- Customer invoices, payment-platform reports, bank deposits, and Forms 1099.
- Receipts and records for business expenses, mileage, supplies, fees, insurance, and equipment.
- A monthly profit-and-loss total rather than a box of receipts opened in April.
- Estimated-payment confirmations and any W-2 withholding changes.
- Prior-year return figures used for a safe-harbor calculation.
A 1099 is an information form, not the only record of taxable business income. Income can still be reportable when no form arrives. If a payment record is wrong, ask the payer for a correction and keep your own documentation.
Common Mistakes That Create Tax Shock
- Saving 15.3% while forgetting federal and state income tax.
- Calculating tax on gross receipts without tracking eligible expenses.
- Spending the reserve during a slow month.
- Waiting for a 1099 before recording income.
- Missing the uneven estimated-tax periods.
- Assuming four equal payments always fit sharply uneven income.
- Ignoring W-2 wages when checking the Social Security wage base or Additional Medicare Tax.
- Calling the deductible half of self-employment tax a 50% tax refund.
Keep W-2 pay and independent income in separate lanes
If you also have a job, Paycheck Proof can help you check the wages, withholding, deductions, and net pay on the employee side. Your business profit and estimated taxes still need their own records.
Self-Employment Tax Questions
Do I owe self-employment tax if I made less than $400?
The general federal rule applies when net earnings from self-employment are $400 or more, though filing requirements and special rules can still apply. Net earnings are not the same as gross customer payments.
Is self-employment tax the same as income tax?
No. Self-employment tax funds Social Security and Medicare. Federal income tax is calculated separately using the full return.
Do I pay tax if I did not receive a 1099?
Potentially, yes. Tax treatment depends on the income, not only whether a customer or platform sent an information form. Keep complete income records.
Can I deduct business expenses before self-employment tax?
Eligible business expenses generally reduce Schedule C net profit, which feeds the self-employment tax calculation. Personal expenses are not business deductions, and mixed-use costs need support.
Can I pay once at tax time instead of quarterly?
You can pay then, but you may face an underpayment penalty if you were required to pay during the year. Check the $1,000 threshold and safe-harbor rules using current Form 1040-ES.
What if my freelance income changes every month?
Update the projection during the year. The annualized-income installment method may better match uneven income, but it requires extra calculation and records.
Give Every Payment Three Destinations
When business money arrives, split it before it starts impersonating spendable cash: operating costs, owner pay, and taxes. That small routine can turn a frightening April balance into payments you already expected.
Use the Pay & Work hub for the full income-help series. If you also receive employee wages, read how to read a pay stub and review paycheck deductions.
Official Sources
This page provides general educational information, not tax, accounting, financial, payroll, investment, or legal advice. Tax results depend on the full return, current law, filing status, location, income, expenses, credits, withholding, and business structure.