Oregon (OR) Self Employment Tax Calculator
Tax year: 2026 · Last updated 2026-06-22 · Source: IRS
Reviewed by CalcSumly Engineering Team, calculator authors and data architects · 2026-06-22
Your Schedule C net profit (income minus business expenses).
If you also had a job, enter wages already subject to Social Security.
Total tax (federal SE + OR income tax)
$17,235
Combined effective rate 21.5% of net profit · 2026 tax year
You owe about $11,304 in federal SE tax and $5,932 in Oregon income tax — a combined $17,235. You can deduct $5,652 from federal income tax.
How this Oregon self-employment tax calculator works
This calculator estimates your total tax on self-employment income in Oregon for 2026. It combines two distinct layers of tax:
- Federal self-employment tax (Schedule SE) — 15.3% on 92.35% of your net profit, split between Social Security (12.4%, capped at the $184,500 wage base) and Medicare (2.9%, no cap). An extra 0.9% Additional Medicare applies above $200,000 (single) or $250,000 (MFJ). The deductible half — 50% of the base SE tax — is then subtracted from your gross income to arrive at federal AGI.
- Oregon state income tax — Oregon taxes Oregon taxable income — federal AGI with Oregon modifications, minus the Oregon standard deduction ($2,910 single / $5,820 MFJ for 2026). Pre-tax 401(k) deferrals and HSA contributions reduce federal AGI and therefore Oregon taxable income.
Step-by-step calculation
- Net earnings: Net profit × 92.35% = SE tax base.
- Federal SE tax: Social Security + Medicare + Additional Medicare (if applicable).
- Deductible half: ½ × (Social Security + Medicare) — deducted above the line on Form 1040.
- Federal AGI from SE: Net profit − deductible half.
- Oregon taxable income: Federal AGI minus the Oregon standard deduction ($2,910 single).
- Oregon income tax: Progressive brackets applied (up to 9.9% top rate).
Scope and limitations
What is excluded: Excludes Portland Metro Supportive Housing Services Tax (1% on Oregon taxable income above $125,000 single / $200,000 joint for Portland Metro area residents) and Multnomah County Preschool for All tax (1.5%–3% above $125,000 for Multnomah County residents). Oregon has no SDI. Oregon Statewide Transit Tax (0.1%) is a payroll tax, not an income tax, and is excluded. This calculator models a single Schedule C filer with no other income sources. It does not include QBI deduction (20%), health insurance deductions, retirement plan contributions, tax credits, or itemized deductions. Consult a tax professional for your full return.
Use this for planning, not filing. Every rate and threshold is pulled from official IRS, SSA, and Oregon DOR — 2026 withholding tables confirming bracket thresholds publications and re-checked each January.
Sources
- IRS — Self-Employment Tax (Schedule SE)
- SSA — 2026 Social Security wage base ($184,500)
- IRS — Topic 751 Additional Medicare Tax
- IRS — Rev. Proc. 2025-32 (2026 inflation adjustments)
- IRS — Form 1040-ES (Estimated Tax for Individuals)
- IRS Notice 2025-67 — 2026 Retirement Plan Limits (§415, §402(g), §401(a)(17))
- IRS — SEP Contribution Limits 2026 ($72,000)
- IRS Notice 2026-10 — 2026 Standard Mileage Rates (72.5 cents/mile)
- IRS Rev. Proc. 2013-13 — Home Office Simplified Method ($5/sqft, 300 sqft max)
- IRS Publication 946 (2026) — Section 179 Deduction ($2,560,000 limit; $32,000 SUV cap)
- Oregon DOR — 2026 withholding tables confirming bracket thresholds
- Tax Foundation — Oregon Income Tax Rates 2026
- Oregon Publication OR-17 (2025) — standard deduction and filing status rules
Frequently asked questions
What is Oregon's income tax rate on self-employment income?+
Oregon has four income tax brackets: 4.75% ($0–$10,200), 6.75% ($10,200–$25,500), 8.75% ($25,500–$125,000), and 9.9% above $125,000 for single filers in 2026. The Oregon standard deduction for single filers is $2,910. For a single self-employed person earning $80,000 net profit, the Oregon marginal rate is 8.75%. Source: Oregon Department of Revenue.
Does Oregon have any additional taxes on self-employment income?+
Statewide Oregon Measure 110 taxes and local Multnomah County Preschool for All tax (1.5% above $125,000 single) are not included in this calculator. If you are a Multnomah County resident with higher income, your effective Oregon-area rate may exceed 9.9%. This calculator models Oregon state income tax only.
What is self-employment tax?+
Self-employment (SE) tax is the Social Security and Medicare tax paid by freelancers, 1099 contractors, and sole proprietors. Employees split these costs with their employer (7.65% each); when you work for yourself you pay both halves — 15.3% total — on 92.35% of your net profit. It is separate from, and on top of, federal and state income tax.
Do I also owe Oregon state income tax on my self-employment income?+
Yes. In addition to federal SE tax, Oregon taxes self-employment net profit as ordinary income. This calculator shows both: the federal SE tax (Social Security + Medicare) and the estimated Oregon state income tax side by side, so you can see your true combined tax bill.
Can I deduct half of my self-employment tax?+
Yes — from federal income tax. You can deduct one half of your Social Security and Medicare SE tax as an above-the-line adjustment to income on Form 1040. This deductible half also reduces your federal AGI, which in turn reduces your state taxable income in most states (except Pennsylvania, which taxes gross compensation regardless).
How can I lower my self-employment tax?+
SE tax is based on net profit (gross revenue minus business expenses), so every legitimate business deduction reduces both your SE tax and your state income tax. Common deductions include home-office use ($5/sqft simplified method), equipment and software (Section 179), business mileage, and professional services. The standard deduction and QBI deduction reduce income tax only — not SE tax.
When do I pay self-employment tax?+
SE tax is paid through quarterly estimated payments (Form 1040-ES), due April 15, June 16, September 15, and January 15 for the prior year's fourth quarter. If you expect to owe $1,000 or more in federal tax after withholding, you generally must pay quarterly to avoid the IRS underpayment penalty. Most states that tax SE income have parallel quarterly estimated payment requirements.
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