S-Corp Tax Calculator — See If an S-Corp Saves You Money
By Sanjeet Singh, CPA
An S-Corp election can save thousands in taxes — but only if your income is high enough. This calculator runs the comparison.
Filing Info
Business Income
Enter your net income to compare sole proprietor vs S-Corp.
You've already formed your S-Corp. Now you need to know: what's your tax bill? This page covers the mechanics of how S-Corp income is taxed — salary, distributions, payroll, and the pieces that matter when you file.
How S-Corp Income Is Taxed
An S-Corp owner pays tax on two things: 1. Salary (W-2 income) — subject to federal, state, SS (6.2% + 6.2%), Medicare (1.45% + 1.45%) 2. Distributions (K-1 income) — subject to federal and state income tax, but NOT self-employment tax
This is the core advantage: Distributions bypass the 15.3% self-employment tax. You only pay income tax on them.
Quick Tax Estimate: Salary + Distributions
Let's say you have $100K net S-Corp income. You must take a "reasonable salary" (let's say $60K). The remaining $40K is a distribution.
| Item | Amount | Tax Rate | Tax Owed | |---|---|---|---| | Salary (W-2) | $60,000 | Fed (22%) + State (5%) + Payroll (15.3%) | $23,580 | | Distributions (K-1) | $40,000 | Fed (22%) + State (5%) | $10,800 | | Total Tax | $100,000 | — | $34,380 | | Effective Rate | — | — | 34.4% |
Compare this to a sole proprietor with $100K net self-employment income:
| Item | Amount | Tax Rate | Tax Owed | |---|---|---|---| | Net SE Income | $100,000 | Fed (22%) + State (5%) + SE Tax (15.3%) | $42,300 | | Total Tax | $100,000 | — | $42,300 | | Effective Rate | — | — | 42.3% |
Savings: $7,920 per year. Minus S-Corp admin costs (~$2,000–$3,000/year), your net savings is roughly $5,000–$6,000. This is why people form S-Corps.
The Payroll Tax Burden
As an S-Corp owner, you must run payroll on your salary. This means:
- Your share (employee): 6.2% Social Security + 1.45% Medicare = 7.65% - Company share (employer): 6.2% Social Security + 1.45% Medicare = 7.65% - Total payroll tax: 15.3% on your salary (same as SE tax, but split)
However, you can deduct the employer portion (7.65%) from your taxable income. So your effective payroll tax rate is lower than 15.3%, similar to being self-employed.
The payroll requirement adds complexity: - Run payroll (typically via ADP, Guidepoint, Rippling, or similar) - File quarterly payroll tax returns (Form 941) - Deposit payroll taxes twice monthly (federal requirement) - File annual W-2 for yourself
Cost: $40–$150/month depending on service.
Reasonable Salary Requirement
The IRS has one strict rule: you must pay yourself a reasonable salary. You can't pay yourself $10K salary and take $90K distribution to dodge all payroll tax.
"Reasonable" means market-rate compensation for the work you do. If you're a consultant earning $100K, a reasonable salary is roughly $50K–$80K (depending on industry and experience). The remaining income flows through as a distribution.
The IRS audits S-Corps that have suspiciously low salaries and high distributions. If audited, they'll impose back payroll taxes plus penalties.
Conservative approach: Allocate 50–60% of net income as salary, 40–50% as distribution. This is defensible even under IRS scrutiny.
Quarterly Estimated Taxes for S-Corp Owners
As an S-Corp owner, you must pay quarterly estimated taxes on: - Your salary withholding (which happens through payroll) - Your K-1 distributions (which have no withholding, so you must estimate)
If your payroll withholding is insufficient to cover your total tax liability (salary + distributions), you owe quarterly estimated payments on the distributions.
Example: Your salary generates $8,000 in federal withholding per year. Your K-1 distributions generate $10,000 in federal tax. You're short $2,000. Pay $500 per quarter in estimated taxes.
State Taxes on S-Corps
Most states tax S-Corp income the same way as federal — salary is fully taxable, distributions are taxable but no SE tax. However:
- California charges an additional corporate tax (~1.5%) on all S-Corp income, regardless of salary/distribution split - New York has similar add-on taxes - Texas, Florida, no-tax states have no income tax, so S-Corp savings are larger
Check your state's rules. Some states also require annual LLC/S-Corp filing fees ($0–$800/year depending on state).
Calculate your S-Corp tax bill →
Related Reading
- S-Corp vs sole proprietor comparison - S-Corp savings calculator - Should you form an S-Corp
Frequently Asked Questions
How is an S-Corp owner's salary taxed?
Like a W-2 employee. Your salary is subject to federal income tax (at your bracket, roughly 22% at $60K), state income tax (varies by state, 3–13%), Social Security tax (6.2% employee + 6.2% employer = 12.4% total), and Medicare tax (1.45% employee + 1.45% employer = 2.9% total). The employer portion of payroll tax (7.65%) is deductible from your taxable income, which reduces your effective rate slightly.
Are S-Corp distributions taxed?
Yes, but not to self-employment tax. Distributions (K-1 income) are subject to federal and state income tax at your marginal bracket (roughly 22% federal + 5% state = 27% combined), but bypass the 15.3% self-employment tax entirely. This is why distributions are the tax-advantaged part of S-Corp income. That said, you must take a reasonable salary first — you can't avoid payroll tax by taking only distributions.
Do I still need quarterly estimated payments as an S-Corp?
It depends on withholding. If your salary withholding is sufficient to cover your full tax liability (salary + distributions), you may not owe quarterly payments. However, if distributions generate additional tax beyond your payroll withholding, you must make quarterly estimated payments on that shortfall. Calculate your total tax (salary + distributions) and compare to payroll withholding. If there's a gap, pay quarterly estimated taxes by April 15, June 15, Sept 15, and Jan 15.
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