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Free Tax Strategy Tool

S Corp Tax Calculator

Compare estimated federal payroll taxes and user-entered administrative costs. Results are estimates, not a tax return projection.

Written by Bryan Martin, CPA, Managing Partner and Founder of Taxstra. Last reviewed October 20, 2026. Taxstra is a CPA firm serving 1,000+ clients in all 50 states.

S-Corp Decision Calculator, on ME Research

Net annual difference+$3,424

Example figures, replace with yours

$
$

Tip: Use a salary study (RC Reports) to be defensible.

*Reasonable Compensation should determine your tax strategy, not the other way around. Enter a specific reasonable salary based on your profession (e.g. Physicians often require higher salaries than other service businesses).

Estimated net annual difference, 2026 figures

+$3,424

Illustrative. Federal payroll tax only, before income and state tax, after $4,000 of annual costs. The $4,000 one-time setup is not subtracted.

Sole proprietor today

Self-employment tax
$21,194
Compliance costs
$0
Total
$21,194

As an S corporation

Salary
$90,000
Payroll tax on salary
$13,770
Compliance costs
$4,000
Total
$17,770

Weighing an S-Corp election?

Book your free 30-minute tax fit call to talk through your next steps.

Tax planning slots are limited before year-end.

Refine the estimate (W-2 wages, state, costs)
$

State tax is not modeled here.

Note: This calculator does not include state income taxes, which vary by state and situation.

Cost Assumptions

$4,000
$0 (DIY)$5,000$10,000 (Complex)
$
$

Your Reality

A few situations make the S-Corp election unavailable or unwise no matter what the math says.

Any nonresident alien (non-U.S.) owners?
More than 100 owners/shareholders?
Rental real estate held in this entity?
Planning to raise venture capital?

Every line of the estimate

Estimated SE tax without S-corp treatment
$21,194
Estimated employer payroll tax
$6,885
Estimated employee payroll tax
$6,885
Estimated payroll tax on salary
$13,770
Estimated distribution amount
$42,230
Estimated gross payroll-tax difference
$7,424
Additional estimated administrative costs
$4,000
Estimated net annual difference
$3,424
Break-even profit estimate
$80,815
Effective difference as a percentage of profit
2.3%
Fit Analysis
Paperwork:You are comfortable with compliance.

Should a $220,000 consultant elect S-Corp status this year?

At $220,000 of consulting profit, an S-corp election usually saves payroll tax only after a defensible salary, payroll cost and state fees are counted. The 2026 deadline was March 16, 2026; a late election can still be accepted under Rev. Proc. 2013-30 when its reasonable-cause conditions are met. The 2027 deadline is March 15, 2027.

Illustrative: $220,000 consultant, 2026 federal payroll tax
LineSole proprietorS-Corp, $100,000 salary
Base$203,170 net SE earnings (92.35%)$100,000 W-2 salary
Social Security$22,878 (12.4% up to $184,500)$12,400
Medicare$5,892$2,900
Total payroll tax$28,770$15,300
Difference before costsabout $13,470

Illustrative arithmetic before payroll service, the S-Corp return, state fees, and income tax effects. Consulting is a specified service business, so the QBI deduction phases out as taxable income rises from $201,750 to $276,750 (single) in 2026, and S-Corp salary reduces QBI. The salary must match the evidence for your role.

How does the S corp tax calculator work?

Use this S corp tax calculator to estimate how electing S corporation taxation could affect your federal payroll taxes. Enter your expected business profit and reasonable compensation to compare an S corporation with a business taxed entirely as self-employment income.

This is an estimate, not a tax return projection. State taxes, payroll costs, retirement contributions, the qualified business income deduction and reasonable-compensation requirements can materially change the result.

  1. 1. Estimate the baselineModel federal self-employment taxes using the profit and wage inputs.
  2. 2. Estimate S corp payrollApply payroll-tax assumptions to the entered reasonable compensation.
  3. 3. Subtract added costsAccount for the payroll, tax-return, setup, and administration costs entered by the user.

Try an illustrative example

Load $150,000 of business profit, $90,000 of hypothetical salary, and $8,000 of user-entered setup and annual costs. These are sample inputs, not a reasonable-compensation recommendation or a projection for your business.

Related Guides

LLC vs. S-Corp
What's the difference?
How to Set Up an S Corp (6 Steps)
Steps, cost, and timing
Reasonable Salary
How much to pay yourself?
Accountable Plans
Tax-free reimbursements
QBI Deduction
20% Pass-through deduction
How Much Does a CPA Cost?
Real fee ranges for 2026
Bookkeeping Cost Calculator
What bookkeeping should cost

When Does an S-Corp Make Sense?

The S-Corp election is a powerful tax strategy, but it's not free. It trades self-employment tax (15.3%) for payroll costs and compliance complexity. To make it worth it, your tax savings must outweigh the costs of running payroll, filing a separate tax return, and paying state franchise taxes. Not sure where to start? Find a tax strategist who can model this for your specific situation.

$75k+
Typical Break-Even Profit
15.3%
SE Tax Rate Avoided on Distributions
$2,500+
Avg. Annual Compliance Cost

Worked example

$150,000 of profit with a $90,000 salary

A single owner of a service business expects $150,000 of 2026 profit, has no outside W-2 job, and models a $90,000 salary. Annual costs are $2,500 for payroll and $1,500 of added tax preparation, plus a $4,000 one-time setup. These are the page's sample inputs, not a reasonable-compensation recommendation.

Inputs

Worked example inputs
Projected annual profit$150,000
Salary (custom amount)$90,000
Outside W-2 income$0
Filing statusSingle
Payroll service cost (annual)$2,500
Added tax prep fees (annual)$1,500
Initial setup cost (one-time)$4,000

Calculator output

Worked example calculator output
SE tax without S corp treatment$21,194
Payroll tax on salary (employee $6,885 + employer $6,885)$13,770
Gross payroll-tax difference$7,424
Added annual administrative costs$4,000
Estimated net annual difference$3,424 (2.3% of profit)
Estimated distribution$42,230
Break-even profit estimate$80,815

Sole proprietor SE tax: $150,000 x 92.35% = $138,525, taxed at 15.3% = $21,194. S corp payroll tax: $90,000 x 15.3% = $13,770. The $7,424 gap, minus $4,000 of annual costs, leaves $3,424. The $4,000 setup cost is shown separately and is not subtracted from the annual figure. Income tax is not part of this comparison.

Methodology

How this calculator works

The calculator compares federal self-employment tax on the whole profit with federal payroll tax on the salary you enter, then subtracts the annual costs you enter. The Assumptions Used table below lists every rate.

Formulas

  • Without S corp: SE tax = 12.4% x the lesser of (profit x 92.35%) or the wage base left after outside W-2 wages, plus 2.9% x (profit x 92.35%), plus any 0.9% Additional Medicare Tax.
  • S corp: payroll tax = employee and employer 6.2% Social Security (wage base $184,500) and 1.45% Medicare on the salary, plus any 0.9% Additional Medicare Tax.
  • Net annual difference = SE tax minus (payroll tax + annual payroll and tax prep costs).
  • Break-even profit = profit x (annual costs / gross payroll-tax difference), which assumes salary stays the same share of profit.

Assumptions

  • The salary you enter is reasonable compensation for the work you do; the percentage presets are illustrations only.
  • Profit is net business profit before paying yourself.
  • Additional Medicare thresholds: $200,000 single and head of household, $250,000 married filing jointly, $125,000 married filing separately.

What it ignores

  • Federal income tax, the QBI deduction, and the income-tax deductions for half of SE tax and the employer payroll tax.
  • State income tax, state S corp taxes and fees, and state unemployment insurance.
  • Retirement plan and health insurance effects, and any IRS challenge to the salary level.

Sources

Primary sources

  1. IRS: S corporation compensation and medical insurance issues: reasonable compensation before distributions
  2. 26 U.S. Code Section 1401: rate of self-employment tax: 12.4%, 2.9% and 0.9% rates
  3. 26 U.S. Code Section 1402: definitions: net earnings from self-employment and the 92.35% factor
  4. Instructions for Schedule SE (Form 1040): SE tax computation and wage-base coordination
  5. 26 U.S. Code Section 3101: FICA tax on employees: employee Social Security, Medicare and Additional Medicare
  6. 26 U.S. Code Section 3111: FICA tax on employers: employer Social Security and Medicare
  7. SSA: 2026 contribution and benefit base: $184,500 Social Security wage base
  8. Instructions for Form 8959: Additional Medicare Tax: thresholds by filing status
  9. 26 U.S. Code Section 1361: S corporation defined: 100-shareholder limit, no nonresident alien shareholders, one class of stock
  10. Instructions for Form 2553: election by a small business corporation: how and when to elect S corporation status

Assumptions Used

Tax year2026
Social Security wage base$184,500
Medicare rates2.9% self-employment; 1.45% employee and 1.45% employer
Additional Medicare treatment0.9% above the threshold for the selected filing status, after outside W-2 income
Salary and distributionsSalary is subject to payroll-tax assumptions; the remaining business profit is shown as an estimated distribution after payroll taxes and entered annual costs
Federal income tax and QBINot included
State taxNot included; state is collected for discussion context only
Visitor-entered costsPayroll service: $2,500; additional accounting/tax preparation: $1,500; setup cost is shown separately

How the S Corp Tax Calculator Works

The calculator compares estimated self-employment taxes on net earnings with estimated employee and employer payroll taxes on the proposed salary. It then subtracts the annual payroll and accounting costs entered by the visitor. It does not decide whether the salary is reasonable or whether an election is available.

S Corp Tax Calculator Example

Enter a clearly hypothetical business profit and salary above. The result panel shows each line used in the comparison:

  1. Estimated self-employment tax without S-corp treatment
  2. Estimated employee and employer payroll taxes on salary
  3. Gross payroll-tax difference
  4. Visitor-entered annual administrative costs
  5. Estimated net annual difference and break-even profit

When an S Corp May Save You Money

A favorable estimate is more likely when business profit materially exceeds supportable reasonable compensation and the payroll-tax difference is larger than added payroll, accounting, state, and administrative costs.

When an S Corp May Not Make Sense

Low or inconsistent profit, a salary close to total profit, outside W-2 wages, ownership restrictions, financing plans, state-level costs, and administrative burden can reduce or eliminate the estimated benefit.

Reasonable Compensation Changes the Calculation

Reasonable compensation is a facts-and-circumstances analysis, not a fixed percentage. Use a defensible salary based on duties, time, experience, and comparable compensation before relying on the estimate.

Costs That Can Reduce Your S Corp Savings

Payroll service, tax preparation, bookkeeping, state filings and taxes, entity maintenance, insurance, and owner time can all affect the net result. Enter known annual payroll and accounting costs above and review the rest separately.

What Taxes Does an S Corp Pay?

An S corp tax calculator is easiest to read once you know which taxes it covers. An S corporation generally pays no federal income tax itself, because profit passes through to the owners. That does not make it tax-free. Here is what applies, and what this page estimates.

TaxWho pays itIn this calculator?
Social Security and Medicare on salaryCompany and owner, each 7.65% (Social Security stops at $184,500 for 2026)Yes
Additional Medicare TaxOwner, 0.9% above the filing status thresholdYes
Federal and state unemployment taxCompanyNo
Income tax on salary and K-1 profitOwner, on Form 1040No
State entity tax and feesCompany, varies by stateOnly as a cost you enter
Built-in gains and passive income taxCompany, generally only if it was a C corporationNo

If your company used to be a C corporation, read our C corp to S corp conversion guide before relying on this estimate.

S Corp Payroll Tax, Worked by Hand

On a $90,000 salary, the owner's 7.65% share is $6,885 and the company's 7.65% share is $6,885, for $13,770 in total. That is the same figure in the sample above. The comparison is $150,000 of self-employment earnings at 92.35%, taxed at 15.3%, or $21,194. Those two numbers are the core of the savings estimate, before your costs.

Is There an S Corp Distribution Tax?

Not as a separate rate. Distributions are generally not taxed up to your stock basis, and they carry no Social Security or Medicare tax. The income tax comes from your K-1, whether or not you take the cash. The distribution line above is a planning estimate, not your K-1 income or your basis. See how S corp distributions are taxed for a worked example.

S Corp vs LLC and Sole Proprietor Tax

The baseline here is self-employment tax, which is what a sole proprietor or a single-member LLC under default rules generally pays. An LLC is a legal entity and an S corp is a tax status, so an LLC can sit on either side of this comparison. For the legal and tax differences, see LLC vs S corp. For timing, see when to switch an LLC to an S corp.

Using This as a California S Corp Tax Calculator

State tax is not in the math, so add it yourself. California generally charges S corporations 1.5% of net income with an $800 minimum, though the minimum is waived for the first tax year. At $150,000 of California net income, that is $2,250 a year. Add it to your annual costs and rerun the estimate. Our California S corp guide has the rest.

Need a Salary Number First?

This page takes a salary as an input and does not decide whether it is reasonable. Use the S corp reasonable salary calculator to work through comparable pay, then bring that number back here.

If the Numbers Work

The election is Form 2553, due March 15, 2027 for a calendar 2027 start. Owner health insurance also runs through payroll, so read our guide to S corp health insurance before your first W-2. This free tool runs in your browser, so there is no spreadsheet to download.

S Corp Tax Calculator FAQs

Should a 1099 consultant earning $220,000 elect S-Corp status this year?

Often yes on the numbers, but in October the practical choices are late-election relief for 2026, if you qualify for it, or a clean election that starts January 1, 2027. Model the salary your evidence supports and the added payroll and return costs before deciding.

Can I still elect S-Corp status for 2026 in October?

Only through late-election relief under Rev. Proc. 2013-30, which requires reasonable cause and returns filed consistently with S status. It is a filing to make carefully, not a formality.

When is the deadline to elect S-Corp status for 2027?

March 15, 2027, for an election that takes effect January 1, 2027. You can file Form 2553 any time during 2026 for that start date.

How much can an S corp save in taxes?

There is no reliable universal amount. The estimate depends on business profit, reasonable compensation, outside wages, filing status, annual administrative costs, and tax items this calculator does not model.

At what income does an S corp make sense?

There is no single income threshold. Compare the payroll-tax difference with supportable salary, state costs, payroll, accounting, and administrative work using the facts of the business.

Does an S corp eliminate self-employment tax?

No. An owner who performs services generally must receive reasonable compensation subject to payroll taxes. The estimate compares payroll taxes on salary with self-employment taxes under the alternative shown.

How much salary must an S corp owner take?

Reasonable compensation depends on duties, time, training, experience, and comparable pay. A percentage-of-profit shortcut does not establish a defensible salary.

Are S corp distributions tax-free?

No. Distributions may avoid payroll tax in the circumstances modeled, but they are not automatically free of federal or state income tax and can be limited by basis and other rules.

Does the calculator include the QBI deduction?

No. Qualified business income effects are not included.

Does the calculator include state taxes?

No. The state field is for discussion context; state income taxes, franchise taxes, fees, and conformity differences are excluded.

Can a single-member LLC use S corp taxation?

A qualifying single-member LLC may be able to elect S corporation tax treatment. Eligibility, timing, state treatment, and owner facts must be reviewed before filing an election.

What taxes does an S corp pay?

An S corp generally pays no federal income tax itself. Its profit flows to the owners on Schedule K-1. The company does pay employer payroll tax on salaries, and it can owe state entity taxes. A former C corporation can also owe built-in gains or passive income tax.

Does this work as an S corp payroll tax calculator?

Yes, for federal Social Security and Medicare. It shows the employee and employer shares on the salary you enter, plus the 0.9% Additional Medicare Tax above your threshold. Federal and state unemployment taxes are not included.

Is there a separate S corp distribution tax calculator?

A separate one is not needed, because distributions do not have their own tax rate. Up to stock basis, a distribution is generally not taxed, and the profit behind it is taxed on your K-1. This calculator shows the payroll tax side and an estimated distribution.

Does the calculator compare an S corp with an LLC?

Yes, for an LLC taxed under its default rules as a sole proprietorship. That baseline is self-employment tax on net earnings. An LLC that elects S corporation status is taxed like the S corp column. A partnership LLC can differ.

Does the calculator work for a California S corp?

It runs the federal math, but state tax is not included. California generally adds a 1.5% tax on S corporation net income with an $800 minimum, and the minimum is waived in the first tax year. Add it to your annual costs when you run the numbers.

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Primary sources checked October 25, 2026

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