How is a sole proprietor’s self-employment tax calculated?

Generally start with 92.35% of net business profit. Social Security is 12.4% up to the remaining annual wage base, Medicare is 2.9%, and Additional Medicare tax can apply.

How does an S-corporation affect taxes?

Reasonable wages incur payroll tax. Pass-through business profit generally is not self-employment income, but remains subject to income-tax rules; distributions are not automatically tax-free.

What income makes an S-corporation worthwhile?

There is no fixed threshold. Compare reasonable wages, outside W-2 wages, payroll taxes, state charges, filing costs, and retirement and QBI effects with a CPA.

S-Corp or Sole Proprietor: A 1099 CRNA’s Guide

An S-corporation election can change employment taxes, but a CRNA's revenue alone does not determine whether the election helps. The useful question is how much remains after defensible compensation and the extra cost of operating the entity.

The sole-proprietor baseline

A sole proprietor generally reports business income and expenses on Schedule C. A single-member LLC normally has that same federal tax treatment unless it elects otherwise.

Self-employment tax generally uses 92.35% of net business profit. Social Security is 12.4%, limited by the 2026 $184,500 wage base after the same person's covered wages. Medicare is 2.9% without that cap, with a possible separate 0.9% Additional Medicare tax. Applying 15.3% to every dollar of gross revenue overstates the calculation. IRS SE tax, SSA wage base.

What changes with an S-corporation

A shareholder who performs services generally receives reasonable W-2 compensation before nonwage distributions. The business pays employer payroll taxes and handles withholding and payroll filings. Remaining pass-through business profit generally avoids self-employment tax, but is still subject to income-tax rules. A distribution's treatment also depends on basis and other rules. IRS S-corporation compensation.

Reasonable compensation depends on the services you perform, time spent, training, and comparable pay. A percentage chosen only to minimize tax is not a compensation analysis.

Why the simple savings formula fails

Suppose a business has $200,000 available before owner wages and employer payroll costs, and proposes $130,000 of wages. Employer Social Security and Medicare alone would be $9,945 at that wage level. That leaves $60,055, before unemployment taxes and other costs, rather than $70,000 available for distributions.

This example only reconciles cash. It does not calculate tax savings, assume that $130,000 is reasonable compensation, or determine how much can legally be distributed.

For a hybrid earner, outside W-2 wages may already use the individual's Social Security cap. A sole proprietor then may owe little or no additional Social Security tax on business earnings, while a separate S-corporation still owes its employer share. Excess employee Social Security withholding can be credited on the personal return; employers do not share one employer-side cap. IRS excess Social Security withholding.

Ask for a complete comparison

Have your CPA compare the same receipts and business expenses under each structure, including:

A documented reasonable salary and both sides of payroll tax.
Payroll service, bookkeeping, tax-return, and state entity costs.
Other wages and the household's Additional Medicare position.
QBI eligibility, including healthcare service-business limits.
Retirement contributions: S-corporation employer contributions use eligible wages, not distributions.
Health-insurance reporting and any coverage eligibility restrictions.

A lower employment-tax number may come with less retirement contribution room or higher income tax. Use the full annual cash and tax result when deciding.

1099 Ops can help organize work and expense records for that review. It does not form an entity or make an election on your behalf. See the current plans, and arrange payroll and filing support before an election becomes effective.