On income reported on a Form 1099-NEC, you owe two federal taxes: self-employment tax at a flat 15.3% and ordinary federal income tax at marginal rates from 10% to 37%. For most independent contractors, the combined federal bill lands somewhere between 15% and 25% of net profit, depending on how much you earned, your filing status, and which deductions you claim. A single filer with $65,000 in net profit and no other income, for example, owes roughly $12,800 in combined federal tax, an effective rate near 20%.
The exact number turns on one figure above all others: your net profit after business expenses. Everything below shows how that number flows through both taxes and where you can shrink it.
Why 1099-NEC Income Carries Two Federal Taxes
A W-2 employee splits Social Security and Medicare taxes with their employer, and the employer withholds federal income tax from every paycheck. As an independent contractor, you get neither arrangement. You owe the full 15.3% for Social Security (12.4%) and Medicare (2.9%) yourself, and the payer who issued your 1099-NEC withheld nothing toward income tax.1Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) That is why 1099 workers usually pay through quarterly estimated payments rather than a single April check.
Start With Net Profit, Not the Box 1 Number
Both taxes are calculated on net profit, not on the gross amount shown in Box 1 of your 1099-NEC. Net profit is gross income minus ordinary and necessary business expenses, reported on Schedule C of Form 1040.2Internal Revenue Service. Instructions for Schedule C (Form 1040) (2025)
If your 1099-NEC shows $80,000 and you had $15,000 in legitimate business expenses, net profit is $65,000. Every dollar of documented expense reduces both taxes, which is why a deduction is worth more to a 1099 worker than to a W-2 employee. Common deductible items include software subscriptions, professional fees, supplies, certifications, and up to $5,000 in startup costs in your first year (with the allowance phasing down once total startup costs exceed $50,000).3Internal Revenue Service. Publication 583, Starting a Business and Keeping Records
Two deductions worth flagging because contractors often miss them:
- Business mileage at the 2026 standard rate of 72.5 cents per mile, which bundles fuel, depreciation, insurance, and maintenance.4Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
- A home office used exclusively and regularly for business, deductible at $5 per square foot up to 300 square feet under the simplified method, or by actual expense percentage under the regular method.5Internal Revenue Service. Simplified Option for Home Office Deduction
Health insurance premiums for yourself, a spouse, and dependents are also deductible for self-employed people, but as an adjustment to income on Schedule 1 rather than as a Schedule C expense. The deduction is available only for months you weren’t eligible for an employer-subsidized plan through a spouse or other source.6Internal Revenue Service. Instructions for Form 7206 (2025)
How Self-Employment Tax Is Calculated
You don’t apply 15.3% to your full net profit. First multiply net profit by 92.35%; that adjustment mirrors the tax break W-2 employees get because the employer’s half of payroll taxes isn’t treated as their wages.7Internal Revenue Service. Topic No. 554, Self-Employment Tax The 15.3% rate applies to that adjusted figure.
On $65,000 net profit:
- SE tax base: $65,000 × 92.35% = $60,028
- SE tax: $60,028 × 15.3% = $9,184
Two thresholds change the math at higher incomes. The 12.4% Social Security portion applies only to earnings up to $184,500 in 2026; above that, only the 2.9% Medicare portion continues.8Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates An additional 0.9% Medicare surtax kicks in on self-employment income above $200,000 for single filers or $250,000 for married couples filing jointly, bringing the combined Medicare rate to 3.8% on the excess.9Internal Revenue Service. Topic No. 560, Additional Medicare Tax
You then get to deduct half of the SE tax when calculating adjusted gross income. In the $65,000 example, that’s $4,592 subtracted before income tax is figured. This deduction doesn’t reduce the SE tax itself, only the income subject to the second tax.1Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
How Federal Income Tax Is Calculated
After subtracting half of your SE tax to arrive at AGI, you take either the standard deduction or your itemized deductions. For 2026, the standard deduction is $16,100 for single filers and $32,200 for married filing jointly.10Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
You also get a separate 20% qualified business income (QBI) deduction on top of the standard deduction, made permanent in 2025. Below taxable income of $201,750 single or $403,500 joint, the full 20% is available regardless of industry; above those thresholds the deduction phases out for service businesses such as consulting, law, and accounting.11Internal Revenue Service. Qualified Business Income Deduction
What remains is taxable income, run through the 2026 single-filer brackets:10Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill
- 10% up to $12,400
- 12% from $12,401 to $50,400
- 22% from $50,401 to $105,700
- 24% from $105,701 to $201,775
- 32% from $201,776 to $256,225
- 35% from $256,226 to $640,600
- 37% over $640,600
Joint-filer thresholds are roughly double. Only the income falling within each range is taxed at that range’s rate, so someone with $32,000 of taxable income pays 10% on the first $12,400 ($1,240) and 12% on the remaining $19,600 ($2,352), for $3,592 in income tax.
A Worked Example at $80,000 Gross
Bringing all of it together for a single freelancer with $80,000 on a 1099-NEC and $15,000 in business expenses:
Step 1: Net profit. $80,000 − $15,000 = $65,000.
Step 2: Self-employment tax. $65,000 × 92.35% = $60,028. $60,028 × 15.3% = $9,184. Half of that ($4,592) becomes a deduction.
Step 3: AGI. $65,000 − $4,592 = $60,408.
Step 4: QBI deduction. 20% of $60,408 = $12,082.
Step 5: Taxable income. $60,408 − $16,100 standard deduction − $12,082 QBI = $32,226.
Step 6: Income tax. 10% on $12,400 = $1,240. 12% on $19,826 = $2,379. Total: $3,619.
Combined federal tax: $9,184 + $3,619 = $12,803, about 16% of gross or 19.7% of net profit. Without the $15,000 in business deductions, the total would climb to roughly $17,400, so tracking expenses saved about $4,600.
Retirement Contributions That Cut the Bill Further
Contributing to a self-employed retirement plan is one of the most effective ways to lower the income tax portion of your bill. It doesn’t reduce SE tax, since SE tax is calculated before retirement deductions, but it can move a meaningful slice of income out of your taxable base.
A SEP IRA allows contributions of up to 25% of net self-employment earnings, capped at $72,000 for 2026, deducted on Schedule 1.12Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs)13Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,50014Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs Contractors aged 50 and older add $8,000 catch-up; those aged 60 through 63 get a $11,250 catch-up.
At moderate income, a Solo 401(k) usually shelters more than a SEP because of the flat $24,500 deferral. On $65,000 of net earnings, the SEP maxes out around $16,250, while the Solo 401(k) allows the $24,500 deferral plus the employer share on top.
Paying It: Quarterly Estimates and Safe Harbor
You’re generally required to make quarterly estimated payments if you expect to owe $1,000 or more for the year.15Internal Revenue Service. Estimated Taxes The 2026 due dates are:
- April 15, 2026 (income earned January through March)
- June 15, 2026 (April through May)
- September 15, 2026 (June through August)
- January 15, 2027 (September through December)
You can skip the January 15 payment if you file your full return and pay any balance by February 1, 2027.16Internal Revenue Service. Form 1040-ES (2026)
Two safe harbors keep you clear of underpayment penalties: pay at least 90% of what you actually owe this year, or pay 100% of last year’s total tax (110% if last year’s AGI exceeded $150,000).17Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty The prior-year safe harbor is usually the easier target when income fluctuates. If you fall short of both, the IRS charges an underpayment penalty that functions like interest; for early 2026 the rate was 7% annually, dropping to 6% starting in April.18Internal Revenue Service. Quarterly Interest Rates
State and Local Tax Is Not Included in the Federal Figure
The percentages above cover federal tax only. Most states with an income tax treat 1099-NEC income the same as any other earned income and require their own quarterly estimated payments once liability crosses a threshold (often around $1,000). Several major cities levy local earnings or net profits taxes on self-employed residents on top of that. Rules vary by jurisdiction, so check your state department of revenue site for the specific forms and deadlines before budgeting your total tax bill.