Self-Employment Tax Estimator
Estimate your self-employment tax, Social Security tax, Medicare tax, deductible portion, and projected quarterly tax obligation. Use this calculator to better understand your tax responsibility and plan ahead for estimated tax payments throughout the year.
Estimate Social Security, Medicare, and Quarterly Self-Employment Tax
Enter your projected annual net business profit, filing status, and any employee wages already subject to Social Security and Medicare tax. All inputs and results begin blank.
Tax Estimate Inputs
Use projected figures for the same 2026 tax year.
2026 Calculation Assumptions
Net earnings subject to SE tax: Net profit × 92.35%
Social Security: 12.4%, limited by the $184,500 combined wage base
Medicare: 2.9% with no wage-base limit
Additional Medicare Tax: 0.9% above the applicable threshold
What Your Self-Employment Tax Estimate Means
This estimator separates the major pieces of self-employment tax so you can understand where your tax obligation comes from, how much may be deductible, and how much you should consider setting aside throughout the year.
Net Earnings Subject to SE Tax
Your business profit is multiplied by 92.35% to determine the amount subject to self-employment tax. This adjustment is required by IRS rules before Social Security and Medicare taxes are calculated.
Social Security & Medicare
The calculator separately estimates the Social Security and Medicare portions of your self-employment tax. Social Security is limited by the annual wage base, while Medicare generally applies to all eligible earnings.
Deductible Portion
Generally, one-half of your regular self-employment tax can be deducted as an adjustment to income on your federal tax return. This reduces taxable income but does not reduce the self-employment tax itself.
Quarterly Planning
The suggested quarterly amount is designed as a planning estimate. Actual estimated tax payments may differ depending on withholding, deductions, credits, state taxes, and other sources of income.
Example Self-Employment Tax Scenarios
These examples show how different income levels, wage history, filing status, and prior tax payments can change the estimated self-employment tax and quarterly set-aside.
New Freelance Consultant
A self-employed consultant wants to estimate annual tax obligations and build a quarterly reserve before the first estimated payment deadline.
Business Owner With W-2 Income
A business owner also receives employee wages and wants to understand how those wages may reduce the remaining Social Security portion of self-employment tax.
Use the examples as planning illustrations only. Actual tax liability may change because of deductions, credits, withholding, multiple businesses, state taxes, retirement contributions, health-insurance deductions, and other tax-return details.
What This Estimator Helps You Plan
Test different profit, wage, reserve, and payment assumptions to see how they may affect self-employment tax and the amount you should consider setting aside.
Lower vs. Higher Profit
Compare how changes in annual business profit may affect Social Security, Medicare, and quarterly reserve estimates.
Try changing: Net self-employment profit.Self-Employment Only vs. W-2 Income
Review how employee wages already subject to Social Security tax may reduce the remaining wage base.
Try changing: Social Security wages.Different Filing Statuses
Compare the Additional Medicare Tax threshold that applies to single, joint, separate, and other filing statuses.
Try changing: Federal filing status.Conservative vs. Higher Reserve
Add an optional income-tax reserve percentage to create a broader federal tax-planning target.
Try changing: Income-tax reserve percentage.No Payments vs. Payments Made
Estimate the remaining annual amount after subtracting federal estimated payments already made.
Try changing: Estimated payments made.Annual vs. Quarterly Planning
Convert the remaining annual reserve into a quarterly planning amount for more consistent savings.
Review: Remaining annual amount and quarterly set-aside.Recalculate as Profit Changes
Self-employment income can fluctuate. Update the estimate when revenue, deductible expenses, wages, or estimated payments change.
Keep Tax Funds Separate
Consider moving a percentage of each business payment into a dedicated tax account rather than waiting until a quarterly deadline.
Who This Self-Employment Tax Estimator Is For
This estimator supports people who earn business or independent-contractor income and need a practical way to estimate self-employment tax and build a tax reserve.
A Practical Starting Point for Tax Planning
Use the estimator when you need to understand how business profit may translate into Social Security, Medicare, and quarterly federal tax-planning needs.
Freelancers
Estimate taxes on income from writing, design, consulting, technology, marketing, and other independent services.
Gig-Economy Workers
Plan for taxes on delivery, rideshare, marketplace, task-based, and other independent-contractor income.
Sole Proprietors
Estimate self-employment tax after deducting ordinary and necessary business expenses from gross income.
Home-Based Business Owners
Plan for taxes while managing business expenses, household costs, reserves, and irregular revenue.
Employees With Side Income
Account for W-2 wages already subject to payroll tax when estimating tax on additional business income.
Quarterly Tax Planners
Convert an annual estimate into a practical quarterly reserve and track payments already made.
This Estimator Is Especially Helpful When:
Starting self-employment, receiving uneven income, adding a side business, updating quarterly payments, or checking whether enough tax money has been reserved.
What This Estimator Does Not Replace
It does not replace a complete federal or state tax return, IRS estimated-tax worksheets, professional tax advice, or an analysis of deductions, credits, withholding, and multiple income sources.
Self-Employment Tax Estimator FAQs
These answers explain self-employment tax, Social Security and Medicare taxes, estimated payments, deductible business expenses, tax reserves, and how to use the estimator for planning.
What is self-employment tax?
Self-employment tax generally includes Social Security and Medicare taxes paid on eligible net earnings from a trade or business. Self-employed workers typically cover both the employee and employer portions.
Is self-employment tax based on gross revenue?
It is generally based on net business profit after deductible business expenses, not total gross revenue. Accurate expense records can materially change the estimate.
Why is net profit multiplied by 92.35%?
Federal self-employment tax rules apply an adjustment before calculating Social Security and Medicare tax. The estimator uses that adjustment to determine net earnings subject to self-employment tax.
What is the deductible half of self-employment tax?
A portion of regular self-employment tax may generally be deducted as an adjustment to income. This deduction may reduce taxable income, but it does not directly reduce the self-employment tax itself.
Do W-2 wages affect self-employment tax?
W-2 wages already subject to Social Security tax may reduce the remaining wage base available for the Social Security portion of self-employment tax. Medicare tax is handled differently.
What is the optional income-tax reserve?
It is a planning percentage added to the self-employment tax estimate to help reserve money for federal income tax. It is not a complete income-tax calculation.
Do self-employed workers need to make quarterly payments?
Quarterly estimated payments may be required when withholding and other payments are not expected to cover enough of the annual tax obligation. The quarterly result is a planning estimate rather than an official payment schedule.
How often should I update the estimate?
Recalculate whenever revenue, deductible expenses, W-2 wages, filing status, withholding, or estimated payments change. Monthly or quarterly reviews can help keep the tax reserve aligned with actual business results.
Planning Checkpoint
Keep business records current and compare projected profit with actual year-to-date results. Separate tax money from operating cash, account for payments already made, and review your estimate before each quarterly deadline.
Learn More About Self-Employment Income, Taxes, and Business Planning
Explore practical guides that can help you prepare for quarterly taxes, organize business finances, manage cash flow, build reserves, and account for expenses that affect taxable profit.
Learn More About Self-Employment Tax and Estimated Payments
Use these official resources to review self-employment tax rules, Schedule SE, estimated-payment requirements, business deductions, payment options, Social Security limits, and small-business tax responsibilities.
IRS Self-Employed Tax Center
Review federal filing responsibilities, income reporting, business expenses, self-employment tax, and estimated-payment information.
Visit the IRS Tax Center ↗IRS Self-Employment Tax Guide
Learn how Social Security and Medicare taxes apply to net earnings from self-employment.
Review SE Tax Rules ↗Schedule SE
Access Schedule SE and its instructions for calculating tax due on net earnings from self-employment.
View Schedule SE ↗IRS Estimated Taxes
Review who may need to make estimated payments, how payments are calculated, and when they are generally due.
Review Estimated Taxes ↗Form 1040-ES
Access the official estimated-tax form, worksheets, instructions, and payment vouchers for individuals.
View Form 1040-ES ↗Deducting Business Expenses
Review general IRS guidance on ordinary and necessary expenses that may reduce net business profit.
Review Expense Guidance ↗Social Security Wage Base
Review the annual contribution and benefit base used to limit earnings subject to Social Security tax.
View SSA Wage Limits ↗Electronic Federal Tax Payment System
Access the federal system used to schedule and submit eligible tax payments electronically.
Visit EFTPS ↗SBA Business Tax Guide
Review federal, state, and local tax responsibilities that may apply to a small business.
Visit the SBA Tax Guide ↗Tax Planning Tip
Compare your calculator estimate with current bookkeeping records, year-to-date profit, W-2 wages, withholding, deductible expenses, retirement contributions, health-insurance deductions, payments already made, and the latest official tax forms before submitting an estimated payment.
Turn Your Tax Estimate Into a More Organized Business Plan
Use these downloadable tools to organize business income, deductible expenses, tax-planning tasks, cash reserves, projected profit, and the financial decisions that support more consistent quarterly tax preparation.
Connect Tax Planning With the Complete Business Picture
Use the Self-Employment Tax Estimator to estimate Social Security, Medicare, and quarterly tax-planning needs. Then use the checklist and profit snapshot spreadsheet to organize revenue, deductible expenses, projected profit, reserves, payment deadlines, and broader business-planning priorities.
Browse All Digital ToolsRevisit the estimate whenever business profit, deductible expenses, W-2 wages, withholding, filing status, or payments already made change. Review current IRS forms and professional guidance before submitting an estimated payment.