S-Corp Election Math: When the Split Saves Tax
The S-corporation election is the most-hyped tax move in the self-employed world — and one of the most misunderstood. It can genuinely cut your tax bill, but only above a certain income, only if your salary is reasonable, and only after you net out real costs it adds. This guide shows the actual math at two income levels using 2026 figures, so you can see where the crossover is instead of taking a promoter's word for it.
Why the split saves tax
A sole proprietor (or a single-member LLC taxed as one) pays self-employment tax of 15.3% on net earnings — that's 12.4% Social Security up to the 2026 wage base of $184,500, plus 2.9% Medicare with no cap. (Technically the tax is figured on 92.35% of net profit on Schedule SE, which is how the two examples below compute it.)
Elect S-corp status and your business income splits into two buckets:
- A W-2 salary you pay yourself — subject to the same 15.3% in combined payroll taxes (employee + employer halves).
- Distributions of the remaining profit — not subject to Social Security or Medicare tax at all.
The saving is simply 15.3% of every dollar you take as a distribution instead of
salary, within the Social Security wage base. Move $40,000 from salary to distribution and
you save roughly $40,000 × 15.3% = $6,120 in payroll tax — before costs.
The reasonable-compensation catch
Here's the constraint that stops everyone from paying themselves $0 salary and taking everything as tax-free distributions: the IRS requires a reasonable salary for the work you actually do, paid before distributions. There is no magic percentage — it's based on what your role would pay in your industry and market. Under-paying yourself to dodge payroll tax is the number-one S-corp audit trigger, and the IRS can (and does) recharacterize distributions as wages, with back taxes and penalties. So the split only saves tax on the portion of profit above a genuinely reasonable salary.
Worked example — $80,000 of profit
Assume a reasonable salary of $50,000 for this owner's role.
| Item | Sole proprietor | S-corp |
|---|---|---|
| SE / payroll-taxed base | $80,000 × 92.35% = $73,880 | $50,000 salary |
| Payroll tax (15.3%) | $11,304 | $7,650 |
| Untaxed distribution | — | $30,000 |
| Gross payroll-tax saving | — | ≈ $3,654 |
That $3,654 gross saving is real — but it's before the S-corp's own costs (below). At $80,000, after a payroll service and a separate business return, the net benefit is often only around $1,000–$2,000. This is exactly why the election is a close call at this income: the saving barely clears the cost.
Worked example — $150,000 of profit
Assume a reasonable salary of $95,000.
| Item | Sole proprietor | S-corp |
|---|---|---|
| SE / payroll-taxed base | $150,000 × 92.35% = $138,525 | $95,000 salary |
| Payroll tax (15.3%) | $21,194 | $14,535 |
| Untaxed distribution | — | $55,000 |
| Gross payroll-tax saving | — | ≈ $6,659 |
At $150,000 the gross saving is $6,659, and even after S-corp costs the net benefit is commonly $3,700–$4,700 — a much clearer win than at $80,000. Both salaries here are under the $184,500 wage base, so the full 12.4% Social Security piece is still in play; that's what makes the saving meaningful.
The costs that eat into the savings
An S-corp is not free. Before you elect, net these against the gross saving above:
- Payroll processing — you must run real payroll, file quarterly 941s, and issue yourself a W-2. A payroll service is a recurring cost.
- A separate business tax return — Form 1120-S plus a Schedule K-1, which typically means higher tax-prep fees than a Schedule C.
- State-level costs — some states charge S-corps a franchise tax or fee (California, for instance, imposes a 1.5% S-corp franchise tax with an $800 minimum).
- Administrative discipline — separate books, reasonable-comp documentation, and the paperwork of the Form 2553 election itself.
Why savings shrink above the wage base
The biggest chunk of the S-corp saving is the 12.4% Social Security tax — and that only applies up to the $184,500 wage base. Once your reasonable salary hits that ceiling, additional wages face only the 2.9% Medicare tax (plus the 0.9% Additional Medicare surtax above $200,000 single / $250,000 married). So moving another dollar from salary to distribution above the wage base saves far less than a dollar moved below it. The election still helps at very high incomes, but the marginal benefit flattens.
See your own SE-tax first. The calculator shows the self-employment tax on your net profit — the number an S-corp election is trying to shrink. Start there, then weigh the split against your reasonable salary and the costs above.
Open the Self-Employment Tax Calculator →- IRS, S Corporation Compensation and Medical Insurance Issues
- IRS, Schedule SE (Self-Employment Tax)
- Social Security Administration, Contribution and Benefit Base (2026 wage base $184,500)
- IRS, Form 2553 (Election by a Small Business Corporation)
Frequently asked questions
How does an S-corp election save on self-employment tax?
A sole proprietor pays 15.3% self-employment tax (12.4% Social Security up to the $184,500 2026 wage base, plus 2.9% Medicare) on essentially all net profit. An S-corp splits that profit into a reasonable W-2 salary — which is subject to the same payroll taxes — and distributions, which are not subject to Social Security or Medicare tax. The payroll-tax saving is 15.3% of the amount you take as a distribution rather than salary, within the wage base.
What is reasonable compensation for an S-corp?
The IRS requires an S-corp owner-employee to pay themselves a reasonable salary for the work they do before taking distributions. There is no single formula; it is based on what a similar role would pay in your industry and region, your duties, and your experience. Paying an artificially low salary to dodge payroll tax is the single biggest S-corp audit trigger, so the split only works to the extent your salary is genuinely reasonable.
At what income does an S-corp election start to make sense?
It depends on your reasonable-compensation figure and your state, but the payroll-tax savings usually only outrun the added costs — payroll service, a separate 1120-S return, and any state fees — once net profit is comfortably into the five figures, often around the $80,000+ range and clearer above roughly $100,000. Below that, the extra cost and complexity frequently eat the savings.
Does the S-corp saving keep growing with income?
Not linearly. Once your salary reaches the $184,500 Social Security wage base, the 12.4% Social Security portion stops applying to additional wages, so the biggest part of the saving is capped. Above the wage base only the 2.9% Medicare (plus the 0.9% Additional Medicare surtax over the thresholds) is in play, so the marginal benefit of moving another dollar from salary to distribution shrinks a lot.
This article is educational information, not tax, legal, or financial advice, and not an offer of any product. Self-employment tax is figured on Schedule SE; the S-corp figures here are simplified planning estimates that ignore state taxes, the QBI interaction, health-insurance and retirement nuances, and your specific reasonable-compensation facts. Figures reflect published 2026 guidance and rates as of July 2026 and can change; confirm current numbers and how they apply to your situation with a licensed tax professional or advisor. Last reviewed July 2026. No liability is accepted for decisions made from this content.