S-Corp Tax Savings Calculator

Whether to elect S-corporation status is the most common tax-structure question American freelancers and small business owners bring to their CPA, and the honest answer is always numeric: how large is the gap between your profit and a defensible salary, and does 15.3% of that gap beat the cost of running payroll and a corporate return? This calculator puts a first number on it in about thirty seconds — the same sole-proprietor-versus-S-corp comparison a CPA would sketch in a first meeting — so you arrive at that meeting knowing whether the election is worth pursuing.

How an S-Corp Election Saves Self-Employment Tax

A sole proprietor in the United States pays self-employment tax of 15.3% (12.4% Social Security up to the $176,100 wage base plus 2.9% Medicare) on 92.35% of all net business income. With an S-corporation election, only the reasonable salary you pay yourself is subject to those payroll taxes — the remaining profit flows through as distributions free of SE tax. The savings equal roughly 15.3% of the gap between your net income and your salary, minus the extra cost of running payroll and filing Form 1120-S.

The IRS requirement that trips people up is reasonable compensation: you must pay yourself what the market would pay someone to do your job before taking distributions. Setting salary artificially low is the most commonly audited S-corp issue, and reclassified distributions come back with payroll taxes, interest, and penalties.

Worked example

A freelance developer nets $150,000. As a sole proprietor, SE tax is about $21,194 (15.3% of $138,525 after the 92.35% adjustment). As an S-corp paying a reasonable $70,000 salary, payroll taxes are about $10,710, plus roughly $1,500 in payroll and filing costs — total $12,210. Estimated annual savings: about $8,980, with $80,000 flowing out as SE-tax-free distributions. Income tax still applies to all of it either way.

When an S-corp election is usually worth it

• Net income is roughly $60,000–$80,000+ — below that, admin costs eat most of the savings.
• You can document a defensible reasonable salary well below total profit.
• You're prepared to run real payroll, file a separate return, and observe corporate formalities — factor the admin into your net profit margin.

What the election actually requires

Mechanically, most owners form an LLC and file Form 2553 to elect S-corp taxation — due within 2 months and 15 days of the start of the tax year it should take effect (late-election relief is often available). From that point the business must run genuine payroll: quarterly Form 941 filings, federal and state withholding deposits, a W-2 to the owner each January, and an annual Form 1120-S with a Schedule K-1. Expect $500–$1,500 a year for a payroll service and $800–$2,000 for the corporate return. A useful rule: if the modelled SE-tax savings are less than about three times these compliance costs, stay a sole proprietor for now and revisit as profit grows — the savings scale with the distribution gap while compliance costs stay roughly flat. Most owners find the crossover arrives somewhere between $70,000 and $90,000 of consistent net income, earlier for very lean solo operations that already run bookkeeping software.

When to Get Professional Advice

This calculator isolates the SE-tax effect and deliberately ignores federal and state income tax, the 20% QBI deduction (which interacts with S-corp salary), state franchise taxes, and states like California that levy a 1.5% S-corp tax. Those factors can shrink — or occasionally reverse — the headline savings. Have a CPA run your full return both ways before electing, and model owner payroll costs with our true cost of an employee calculator. Law and accounting firms: LexScale.ai builds interactive tools like this that turn this exact search traffic into client intake.