S-Corp Tax Savings Calculator: How Much Does an S-Corp Save in 2026?

The formula behind every S-Corp calculator

Every honest S-Corp calculator runs the same two-line comparison. Line one is your self-employment tax as a sole proprietor: 15.3% on 92.35% of net profit, with the 12.4% Social Security piece capped at the $184,500 wage base and the 2.9% Medicare piece uncapped. Line two is FICA on the reasonable salary you would pay yourself as an S-Corp, at the same 15.3% up to the wage base. The difference between the two lines, minus the cost of payroll and a separate 1120-S return, is your savings.

The rates come straight from the code. Self-employment tax is set by IRC §1401 at 12.4% for Social Security plus 2.9% for Medicare, and §1402(a)(12) applies that combined 15.3% to 92.35% of net earnings. The Social Security half stops at the contribution and benefit base, which the Social Security Administration set at $184,500 for 2026. A wage and a distribution are taxed differently: wages carry FICA, but S-Corp distributions carry no FICA, no self-employment tax, and no Additional Medicare tax. That gap is the entire source of the savings.

How much does an S-Corp save?

The savings equal the self-employment tax you would owe as a sole proprietor minus the FICA tax on a reasonable salary inside the S-Corp. On $150,000 of profit, a sole proprietor owes about $21,194 in self-employment tax in 2026. Pay yourself a $65,000 salary inside an S-Corp and the FICA bill drops to $9,945, a gross saving of roughly $11,249 before payroll and 1120-S costs. The distribution portion, $85,000 here, avoids the 15.3% entirely.

The three cards below hold the assumptions steady so you can see how the number moves with income. Each owner is a single filer with no outside W-2 wages, and the salary in each case is a plausible reasonable figure for that profit level. All numbers use 2026 rates and are rounded.

Notice the savings keep growing in dollars but slow down in percentage terms. Between $150,000 and $250,000 of profit, an extra $100,000 of income only adds about $3,000 of gross savings. That is the wage base at work. Above $184,500 of salary, the Social Security tax switches off, so every distribution dollar past that point only dodges the 2.9% Medicare slice instead of the full 15.3%.

Where the savings disappear

An S-Corp does not save money at every income level. The election has fixed costs, usually $1,500 to $3,000 a year for payroll processing and a separate 1120-S return, so very low profit produces savings too small to cover them. Below roughly $50,000 to $60,000 of profit the math often does not work. The savings also shrink at high income, because once your wages cross the $184,500 Social Security wage base, the only tax a distribution avoids is the 2.9% Medicare slice rather than the full 15.3%.

Outside wages are the other trap. If you also hold a W-2 day job that already crosses the wage base, your sole-proprietor self-employment tax was only the 2.9% Medicare piece to begin with, so the S-Corp has far less to save. I work through that case in detail in the guide on the Social Security wage base and S-Corp savings, where the same business produces a gain for one owner and a small loss for another.

You cannot just zero out the salary

The obvious move, pay yourself $1 and take $150,000 in distributions, does not survive contact with the IRS. IRC §1366 and decades of IRS guidance require an S-Corp owner who works in the business to pay reasonable compensation before taking distributions. In Watson v. Commissioner, the court recharacterized distributions as wages where a CPA paid himself $24,000 against a practice that generated far more. An unreasonably low salary invites the IRS to reclassify your distributions as wages, plus payroll taxes, penalties, and interest. The IRS lays out the factors it weighs on its S-corporation compensation page. I cover how to set a defensible figure in the post on S-Corp reasonable compensation.

The QBI wrinkle a basic calculator misses

The §199A qualified business income deduction can cut both ways here, and it cuts both ways. The section 199A qualified business income deduction is 20% of qualified business income, and the wages you pay yourself as an S-Corp are not QBI. So a higher salary lowers your QBI deduction even as it satisfies the reasonable compensation rule. Above the income thresholds the deduction is also limited by W-2 wages, where paying yourself a salary can actually help. A calculator that ignores 199A will overstate or understate the real number. The interaction is detailed in the 2026 QBI deduction guide.

One more simplification worth naming. The figures above compare payroll tax to self-employment tax, which is how most calculators frame the headline number. They set aside the smaller second-order effects, like the income-tax value of the deductible half of self-employment tax under §1401 and the deductible employer share of FICA. Those move the final number by a few hundred dollars in either direction, not thousands, but a careful projection should fold them in.

Run your own numbers

A printed table only takes you so far, because the answer turns on your exact profit, your reasonable salary, your other wages, and your state. Plug your figures into the EntityIQ S-Corp tax calculator, which asks for outside W-2 income and the wage base instead of assuming them away, then generates a pre-filled Form 2553 if the election clears the cost. When you are ready to file, see the guides on the S-Corp election deadline and how to file Form 2553.

This article is educational and is not legal or tax advice. The numbers above are 2026 figures, the owner is theoretical, and amounts are rounded. Please consult a qualified CPA or enrolled agent before filing an S-Corp election.