S Corp Breakeven Calculator

Find the net profit at which electing S-corp status actually starts to pay — after payroll tax on your salary, the Section 199A deduction, your state's tax on the S corporation itself, and the annual cost of running it.

Quick answer: Find the net profit at which electing S-corp status starts paying off, after payroll tax, the Section 199A deduction, state entity-level tax, and the annual cost of running the entity. Enter Business net profit (before paying yourself), Reasonable salary you would pay yourself, Filing status, and State to personalize the estimate. It returns Net annual cost, Breakeven net profit, and Payroll tax on salary so you can compare the impact before choosing a next step. Use it to estimate tax impact, withholding, deduction, bracket, and after-tax cash-flow tradeoffs.

Your situation

Business net profit (before paying yourself)

Revenue minus business expenses — your Schedule C net profit today.

Reasonable salary you would pay yourself

What the same work would pay as an employee. The IRS requires this to be defensible — it is the most scrutinized number in a solo S corp.

Filing status

State

Annual cost to run the S corp

Payroll, bookkeeping, and the separate business return, above what you already spend. A full-service platform runs about $3,588/yr; payroll software plus a CPA return is often $1,500-2,500.

Your decision

At $120,000 of net profit in California, electing S-corp status costs you about $174 more per year than staying a sole proprietor. It starts paying off around $129,300 of profit, and is reliably worth it above $266,700.

Recommended: Stay a sole proprietor

Net annual cost

Watch

$174

electing would cost you this

Total tax as a sole proprietor, minus total tax as an S corp, minus the entity-level state tax and the annual cost of running the S corp.

Breakeven net profit

$129,300

reliably worth it above $266,700

The profit level where electing first comes out ahead, holding your salary at the same share of profit. It dips back below zero inside the Section 199A phase-out band before turning reliably positive at the higher figure.

Payroll tax on salary

$10,710

on $70,000 of W-2 wages

Both halves of Social Security and Medicare on the owner salary. Distributions above the salary avoid this — which is the entire mechanism behind an S election.

State tax on the S corp itself

Watch

$800

California

Entity-level tax the S corporation owes that a sole proprietor would not. This is the line most S-corp calculators leave out entirely.

Cost to run the S corp

$3,588

payroll, bookkeeping, second return

Your entered annual cost, above what you already spend as a sole proprietor. Deducted as a business expense in the model.

Section 199A deduction

$8,051

sole proprietor: $19,084

Salary is not qualified business income, so electing usually shrinks this. Above the phase-out threshold it can reverse: the W-2 wages an S corp pays may unlock a deduction a sole proprietor cannot claim at all.

Ranked options

#1Stay a sole proprietor
At this profit the payroll-tax saving does not cover the cost of running the S corp plus California's entity-level tax. Revisit at around $129,300 of profit.
$174/yr
Confidence: HighEffort: LowRisk: Low
#2Elect S-corp status
Would cost about $174 more per year than staying as you are.
Confidence: HighEffort: HighRisk: Medium

Watch-outs

• California taxes S corporations at 1.5% of net income, with an $800 minimum franchise tax. A California single-member LLC already pays its own $800 annual tax, so if you already have an LLC the incremental cost of electing is closer to the 1.5% alone. Newly formed corporations are exempt from the minimum in their first tax year, which is not modeled.
• A planning estimate, not tax advice or a tax return. It excludes tax credits, married-filing-separately, local and city income tax, retirement-plan and health-insurance interactions (both of which can favor an S corp), state unemployment insurance on the owner salary, one-time formation costs, and the 25%-of-wages-plus-UBIA alternative QBI cap. Reasonable compensation is a facts-and-circumstances question for a tax professional.
• The advantage is not a straight line as profit grows. Electing also comes out ahead between $129,300-$205,000 of profit, then falls behind again before turning durably positive above $266,700. That dip is the Section 199A phase-out: in that band a sole proprietor still gets part of the 20% deduction, while the S corp's is already capped at 50% of W-2 wages. If your profit sits in one of those bands, treat the result as genuinely marginal rather than a clear yes.

Assumptions used

Net profit before owner pay: $120,000
Reasonable salary: $70,000
Annual cost to run the S corp: $3,588
Filing status: single
State: California
Total tax as sole proprietor: $34,741
Total cost as S corp: $34,915
Social Security wage base: $184,500
QBI phase-out threshold: $201,775
Entity-tax source: California Franchise Tax Board, S corporations

Estimates based on your assumptions above — roughly indicative, not financial, tax, or legal advice.

Next steps

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Why this matters

Most S-corp calculators show the self-employment tax you avoid by taking distributions instead of salary. That number is always positive, so those tools effectively always say yes. The costs that decide the real answer are the ones they leave out: the several thousand dollars a year it takes to run payroll and file a second return, and the entity-level tax some states charge the S corporation itself — California's 1.5%, Illinois' replacement tax, and Tennessee's excise tax can take back a third or more of the federal savings. This calculator subtracts all of it and tells you the profit level where electing stops costing more than it saves.

Frequently asked questions

How much profit do I need before an S corp is worth it?

There is no single number, which is why this tool solves for yours. The answer moves with your state, your filing status, how much of your profit is a defensible salary, and what you pay to run the entity. As a rough shape: with a typical salary ratio and a full-service provider at roughly $3,600 a year, breakeven often lands somewhere in the $70,000-$110,000 range of net profit, and it sits meaningfully higher in states that tax the S corporation directly. Enter your own numbers rather than trusting a rule of thumb.

What is a reasonable salary, and why does it matter so much?

The IRS requires an S-corp owner to pay themselves reasonable compensation for the services they actually perform before taking distributions. It is the most scrutinized number in a solo S corp, because every dollar shifted from salary to distribution avoids 15.3% in payroll tax. This calculator takes your salary figure as given and does not determine what is reasonable for your work — that is a facts-and-circumstances question. If the salary you enter would not survive an audit, the savings shown are not real.

Which states tax the S corporation itself?

California charges 1.5% of net income with an $800 minimum franchise tax. Illinois levies a 1.5% Personal Property Replacement Tax. Tennessee does not recognize the federal S election at all and applies a 6.5% excise tax after a $50,000 deduction. Massachusetts charges a $456 minimum corporate excise, and New York a receipts-based fixed dollar minimum. This calculator subtracts whichever applies to your state.

Does an S corp change my Section 199A deduction?

Yes, and it cuts both ways. Salary is not qualified business income, so electing shrinks the base the 20% deduction applies to. But above the phase-out threshold the deduction is capped at 50% of W-2 wages, and a sole proprietor with no employees pays none — so their deduction is zero. An S corp pays the owner W-2 wages, which can unlock a deduction that was otherwise unavailable. Below the threshold electing usually costs you QBI; above it, electing can create it.

What does this calculator leave out?

Local and city income tax, including the New York City General Corporation Tax, which does not recognize the S election and can reverse the answer outright for NYC businesses. Also excluded: tax credits, state unemployment insurance on the owner salary, one-time formation costs, and retirement-plan and health-insurance interactions, which generally favor an S corp and so make this estimate somewhat conservative for owners making large solo 401(k) contributions.

This tool produces estimates based on the assumptions you enter. It is not financial, tax, or legal advice. Actual rates, fees, and outcomes depend on your lender, account terms, and approval.