What is the Social Security wage base for 2025?

For 2025, the Social Security wage base shown on this page is $176,100. The Social Security portion of self-employment tax applies only up to that limit.

Do I have to pay self-employment tax if I earned under $400?

Generally no. Self-employment tax usually applies only when net self-employment earnings are $400 or more for the year.

Can I deduct part of my self-employment tax?

Yes. You can generally deduct half of the regular Schedule SE tax when calculating adjusted gross income. Additional Medicare Tax is figured separately on Form 8959.

Self-Employment Tax Calculator for 2025 and 2026

Reviewed QuickTaxTools editorial review Updated April 25, 2026 and aligned to the sources linked below.

Tax year 2025 and 2026 This page uses the federal or state scope called out in the methodology section.

Source set IRS, SSA, and official guidance Primary references are linked on-page and collected in the site sources library.

Methodology Source library

Net self-employment income

After business expenses, before any tax deductions

Filing status

Total SE tax

Deductible half of SE tax

Effective SE rate

Gross net SE income-

SE tax base (92.35%)-

Social Security tax (12.4%) on SS wage base-

Medicare tax (2.9%) on all earnings-

Additional Medicare tax (0.9%)-

SE tax + addl. Medicare-

Deductible half of regular SE tax-

Adjusted gross income (after SE deduction)-

For estimation only. Does not include federal or state income tax. If you also have W-2 Medicare wages, use the 1099 tax calculator because Form 8959 combines wages and self-employment income for Additional Medicare Tax.

How self-employment tax works

SE tax covers both the employee AND employer share of Social Security (12.4%) and Medicare (2.9%) - totaling 15.3%. However, it's calculated on only 92.35% of your net income (not 100%), and you can deduct 50% of SE tax from your gross income before calculating income tax.

Methodology

How this calculator works

Convert net business income into net earnings from self-employment using the Schedule SE 92.35% base.
Apply the Social Security portion up to the annual wage base and the Medicare portion to all covered earnings.
Show the half-SE-tax deduction separately so users can carry it into broader federal income-tax planning.

Worked example

Example scenario

If a sole proprietor expects $60,000 of net Schedule C income, this tool multiplies that amount by 92.35%, applies the Social Security and Medicare rates, and then shows the deductible half of the regular self-employment tax so the user can bring it into a refund or quarterly-payment estimate.

Primary references

Direct sources for this page

IRS Instructions for Schedule SE

Self-employment tax base and Schedule SE calculation rules.

SSA contribution and benefit base

Annual Social Security wage-base limit.

IRS Publication 505

Estimated-tax and withholding planning for self-employed filers.

Reviewed with the site-wide editorial methodology and the full sources library.

Next step

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