Electing S-corp status is one of the most powerful tax moves a self-employed person can make, but the math behind it is also one of the most misunderstood. This S-corp tax calculator isolates the single biggest benefit of being taxed as an S corporation: you stop paying self-employment (SE) tax on the portion of your profit that comes out as distributions instead of W-2 salary.
The idea is simple. A sole proprietor or single-member LLC pays 15.3% self-employment tax on 100% of net profit. An S-corp pays that same 15.3% — called FICA when it runs through payroll — only on the reasonable salary it pays the owner. The rest of the profit, paid out as distributions, is not subject to FICA or SE tax at all. Enter your annual net profit and the W-2 salary you plan to pay yourself, and the calculator shows exactly how much payroll tax you would save each year.
How to Use
- Enter your Annual Net Profit — the business profit left after all expenses, before any owner compensation. This is the bottom line on your Schedule C or your S-corp's Form 1120-S.
- Set your Reasonable Salary (W-2). This is the wage the S-corp will pay you through payroll, reported on a W-2. The IRS requires it to match what a comparable worker would earn for the work you actually do — it cannot be $0 just to dodge payroll tax.
- Optionally add your Federal Income Tax Rate (your marginal bracket, e.g. 22 or 24). If you only want to see the FICA/SE savings, leave this at 0.
- Optionally add your State Income Tax Rate. If you live in Texas, Florida, Washington, Nevada, Wyoming, South Dakota, or Alaska, leave this at 0.
- Read the result card: the distributions line is the payroll-tax-free slice of profit, the S-corp FICA tax is what you actually pay, and annual FICA / SE-tax savings is the headline number you save versus staying a sole proprietor.
The result card also shows a side-by-side comparison: your total tax as an S-corp versus your total tax if you stayed a sole proprietor, with the net savings highlighted.
How S-Corp Tax Savings Actually Work
A self-employed person's profit is hit by two federal taxes:
- Income tax — progressive brackets from 10% to 37%.
- Self-employment tax — 15.3% on net earnings, covering 12.4% Social Security and 2.9% Medicare.
An S-corp splits the owner's compensation into two buckets:
- W-2 salary — subject to FICA (7.65% withheld from the employee paycheck, plus a 7.65% employer match, totaling 15.3%). The employer half is deductible on the S-corp's return.
- Distributions — profit paid to the owner after salary. These pay federal (and possibly state) income tax, but zero FICA and zero SE tax.
That is the entire game. On a $200,000 profit with a $100,000 reasonable salary:
- S-corp FICA: $100,000 × 15.3% = $15,300
- Sole-prop SE tax: $200,000 × 15.3% = $30,600
- Annual savings: $15,300 — every year, just for electing S-corp status and paying yourself a defensible salary.
The IRS is not naïve about this. It actively audits S-corp owners it suspects of paying themselves artificially low salaries to maximize the distribution slice. The "reasonable salary" standard is the guardrail — pay yourself what someone with your role, experience, and hours would earn in the open market, and the savings are defensible.
What Counts as a "Reasonable Salary"?
There is no fixed formula, but the IRS looks at:
- Training and experience — a seasoned consultant commands more than a first-year freelancer.
- Duties and responsibilities — how much of the revenue depends on your personal labor.
- Time devoted — part-time owners cannot justify a full-time executive salary.
- Comparable pay — what other companies in your area pay someone in your role.
- History of payouts — salaries that look suspiciously round (e.g. exactly $40,000 on a $400,000 profit) draw scrutiny.
A common rule of thumb for solo professional practices (consulting, design, software) is a salary in the range of 40–60% of net profit, leaving the rest as distributions. Use the slider in this calculator to test how your savings change as you move the salary up or down — and remember that lowering the salary boosts savings but also raises audit risk.
The Hidden Costs of an S-Corp
The savings are real, but they are not free. Before you elect, account for:
- Payroll processing fees — $30–$100 per month to run W-2 payroll.
- Form 1120-S filing — usually $500–$2,000 for a CPA at tax time, versus a Schedule C.
- State franchise fees — California, New York, and other states charge annual minimums.
- Separate bank account and bookkeeping — the S-corp must keep its own books.
Once your net profit clears roughly $60,000–$80,000, the payroll-tax savings typically outweigh these compliance costs. Below that, the S-corp layer is usually not worth the paperwork.
Examples
Example 1 — The classic $200K practice. A freelance developer nets $200,000 and pays herself a $100,000 W-2 salary. Distributions are $100,000. S-corp FICA is $15,300, versus $30,600 in self-employment tax as a sole proprietor — an annual savings of $15,300, or about 7.65% of profit. Over a decade that is well over $150,000 before accounting for raises and investment growth.
Example 2 — A high-margin solo business. A consultant nets $1,000,000 and pays herself a $300,000 reasonable salary. Distributions are $700,000, and none of that slice pays FICA. S-corp FICA is $45,900 versus $153,000 in SE tax — a savings of $107,100 per year. At this income level, the Social Security wage base ($168,600 in 2024) also matters: wages above it stop paying the 12.4% Social Security portion, which this simplified model does not break out.
Example 3 — No savings case. If the S-corp pays out 100% of profit as salary (netProfit = reasonableSalary = $150,000), distributions are $0, FICA is $22,950, and the savings versus a sole proprietor is $0. This is the edge case that shows why the election is only valuable when there is meaningful profit left after a defensible salary.
FAQ
How much can an S-corp save me on self-employment tax?
On profit $P with a reasonable salary $S, the annual payroll-tax saving is roughly (P − S) × 15.3%. For a $200,000 profit and a $100,000 salary, that is $100,000 × 15.3% = $15,300 per year. Use the calculator above to plug in your own numbers.
What is a reasonable salary for an S-corp owner?
It must match what an independent employer would pay someone with your training, duties, and hours for the same work. Solo consultants often land in the $60,000–$120,000 range; higher earners and business owners with employees usually pay more. The IRS audits salaries that look engineered to minimize FICA.
When does electing S-corp status make sense?
Once net profit clears about $60,000–$80,000, the FICA savings usually outweigh the cost of payroll software, Form 1120-S preparation, and state franchise fees. Below that threshold, the compliance burden typically eats the benefit.
Are S-corp distributions taxed at all?
Yes. Distributions pay federal (and often state) income tax — they are just not subject to FICA or self-employment tax. The S-corp itself usually pays no federal income tax because profit passes through to the owner's personal 1040 on a K-1.
Can I pay myself $0 salary and take everything as distributions?
No. The IRS treats that as unreasonable compensation and can reclassify distributions as wages, then assess back FICA, penalties, and interest. Pay yourself a defensible W-2 wage first; only the remaining profit should come out as distributions.
Does this calculator account for the Social Security wage base?
No. This simplified model applies 15.3% flat to salary for a clean side-by-side comparison. In practice, wages above the annual Social Security wage base (about $168,600 in 2024) stop paying the 12.4% Social Security portion and only continue paying 2.9% Medicare, so high earners' actual FICA may be slightly lower than shown. Consult a CPA for a year-specific calculation.
Disclaimer
This S-corp tax calculator is provided for informational purposes only and does not constitute legal, tax, or accounting advice. Estimates use a simplified 15.3% flat FICA/SE rate and do not model the Social Security wage base, the 0.9% Additional Medicare Tax on high earners, the QBI 20% deduction, state-specific S-corp rules, or the Employment Tax Excise Tax the IRS can impose on unreasonable compensation. Reasonable salary determinations are fact-specific and often contested. Always confirm your S-corp election, salary level, and distributions strategy with a qualified CPA or enrolled agent before filing.