A C Corp vs S Corp tax calculator compares entity tax on the same profit—including Schedule C to S Corp projections. Run the free calculator above, then read entity tradeoffs below.
Free C Corp vs S Corp tax calculator: compare entity tax on the same profit, Schedule C vs S Corp modeling, and S Corp election projections.
Practical tip Start with round numbers from your bank or contract. You can refine decimals after the first pass.
What to enter
Have these handy before you start. Names vary by tool, but the ideas are the same.
Income, gains, or transaction amounts
Holding period or filing status where relevant
Rates or brackets that apply to your case
State or local rules if the tool supports them
Quick workflow
Enter amounts as shown on your statements.
Pick the filing options that match your situation.
Use the result as a rough check before filing.
Free calculator This article is the guide. For side-by-side entity math, open the Schedule C to S Corp tax projection tool on the same profit inputs. If you already elected S-Corp, model reasonable salary vs distributions on the S Corp tax planning calculator.
C Corp vs S Corp vs Schedule C on the same inputs
Schedule C (default sole prop or single-member LLC) pays income tax plus self-employment tax on net profit. S-Corp splits profit into W-2 wages (payroll tax) and distributions. C-Corp pays 21% federal corporate tax, then shareholders may pay tax again on dividends—double taxation unless you retain earnings or pay yourself W-2 only.
Use our structure calculator to hold profit, salary, and entity type constant, then swap C vs S vs pass-through. State franchise taxes, QBI deduction, and owner health insurance can shift the winner—confirm with a tax pro before electing or incorporating.
Worked example (illustrative)
Same $100,000 net profit, single owner: on Schedule C, self-employment tax applies to the full amount (15.3% on net, subject to the Social Security wage base). As an S-Corp with a $60,000 W-2 salary, payroll tax hits wages only; the remaining $40,000 may avoid self-employment tax as distributions (still subject to income tax). A C-Corp might pay 21% corporate tax on $100,000 ($21,000) before any salary or dividend—then you pay personal tax on W-2 or qualified dividends. The winner depends on salary level, state tax, QBI, and whether you need retained earnings in the company. Run all three in the corporate structure calculator with your numbers—not tax advice.
Common search questions
C Corp vs S Corp tax calculator — compare entity tax on the same profit inputs.
Schedule C vs S Corp tax calculator for accountants — modeling starting point, not tax advice.
Schedule C to S Corp tax projection — stress-test salary, distributions, and entity choice before switching.
Open the tool when you already have a quote, a deadline, or a what-if and need a clear number for taxes.
Situations people use it for
Rough-order tax impact before talking to a CPA
Comparing entity or filing structures at a high level
Estimating proceeds after tax on a sale or exercise
How to read the result
Treat the output as a structured estimate. Small input changes should move the result in a direction that makes sense.
Run a conservative case first. If it still works, you have margin.
Change one field at a time so you know what actually moved the number.
Save the scenario with a name you will recognize later ("2027 refi", "15-year plan").
This model assumes: Free C Corp vs S Corp tax calculator: compare entity tax on the same profit, Schedule C vs S Corp modeling, and S Corp election projections.
Common slip-ups
Using the result as if it were a tax return (it is only a model)
Using last year's brackets for a life event that changed your situation
Ignoring state/local when only federal was modeled
Try it with your numbers
Open the C Corp vs S Corp Tax calculator, enter your case, and keep a screenshot or PDF if you will revisit the decision. Everything runs in your browser; your inputs are not sent to our servers for the math.