Purpose and steps
The LLC Tax Calculator: Sole Owner vs S-Corp 2026 calculates single-member LLC payroll tax and an S-corporation salary scenario. Start with the defined inputs and their units, then use the equation and numerical example below to check the model. Tax tools use a simplified stated-year scenario, not a complete tax return.
- Confirm currency and monthly versus annual amounts. U.S. tax and loan models should be used within their stated scope.
- Prepare LLC net business income, Reasonable S-corp salary, Estimated state income-tax rate. Defaults demonstrate the model rather than your personal circumstances.
- Check the headline result and its components. A key interpretation for this tool is: The payroll difference is not the same as final total-tax or total-cost savings.
- Compare the baseline with a changed scenario: Salary must satisfy reasonable-compensation requirements; the calculator does not establish a permissible salary.
Input reference and units
These values reproduce the model’s demonstration. Replace them with your own records or measurements; they are not recommended targets.
On a small screen, swipe the table horizontally to see all columns.
| Parameter | Demonstration value | How to enter it |
|---|---|---|
| LLC net business income | 120000 USD | Use dollars and the monthly or annual period stated in the field label; do not enter thousands of dollars. |
| Reasonable S-corp salary | 60000 USD | Use dollars and the monthly or annual period stated in the field label; do not enter thousands of dollars. |
| Estimated state income-tax rate | 5 % | This is an approximate flat state rate, not a full state-specific tax schedule. |
Model-specific method
How this calculator produces its result
Single-owner SE payroll tax uses 92.35% of net profit. S-corp payroll tax uses the entered salary, capped at entered profit, at combined employer/employee Social Security and Medicare rates. Displayed payroll saving is sole-owner payroll tax minus S-corp payroll tax; distributions are profit minus salary.
Piecewise tax functions, deductions and credits
Progressive tax is a piecewise-linear function. Passing a threshold changes the rate on the next slice, not on all earlier income. A deduction therefore often saves approximately deduction × marginal rate, but the exact saving can span several brackets. A credit instead subtracts from the computed tax, subject to its own restrictions.
Depreciation allocates a tax basis over time and differs from a cash purchase expense. Self-employment tax has separate bases and limits from federal income tax. A mathematical model can explain the order of operations, but eligibility, filing status, thresholds and tax years must be checked against current rules.
Taxable income = max(0, income − allowed deductions) Tax = Σ(income slice in bracket × bracket rate) Tax after credit = max(0, tax − credit)
- Bracket: one interval of taxable income
- Marginal rate: rate on the next income slice
- Effective rate: total tax divided by a stated income base
- Deduction and credit act at different stages
Worked example
At $100,000 profit and $60,000 S-corp salary below the ceiling, modeled sole-owner payroll tax is $14,129.55 and S-corp payroll tax $9,180, a $4,949.55 difference before administration costs. Remaining modeled distribution is $40,000.
Reproduce the default scenario
This is a separate example, calculated using the exact engine on the tool page and the defaults in the input reference above. Health examples use metric units. Displayed rounding may differ from intermediate precision.
- Estimated payroll-tax savings
- 7,775.46 USD
- Single-member LLC payroll tax
- 16,955.46 USD
- S-corp payroll tax
- 9,180 USD
- S-corp distribution
- 60,000 USD
- Single-member estimated total tax
- 38,660.36 USD
- S-corp estimated total tax
- 31,740.2 USD
Reading results without overstating them
- The payroll difference is not the same as final total-tax or total-cost savings.
- Salary must satisfy reasonable-compensation requirements; the calculator does not establish a permissible salary.
Assumptions and exclusions
- This is a simplified tax-election comparison, not LLC formation advice. Employer deductions, QBI, state entity fees, accounting costs and benefits require a fuller analysis.
Sources and content notes
Toolify describes the implemented algorithm and its assumptions. Sources below support the topic or applicable rules; they do not endorse this calculator. Examples are illustrative, and published rules take precedence over simplified estimates.
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