What's the difference between a sole proprietor and an S-Corp for tax purposes?

A sole proprietor (or default single-member LLC) pays self-employment tax on all net business income. An S-Corp owner-employee splits income into a W-2 salary (subject to payroll tax) and a distribution (K-1 pass-through profit, not subject to payroll tax — only ordinary income tax). Shrinking the payroll-tax base to just the salary is where the savings come from.

How much net income do I need before an S-Corp election is worth it?

There's no universal number — it depends on your reasonable salary, your state, and your actual compliance costs. As a rough planning range, many freelancers find the payroll-tax savings start clearing typical $2,000-4,000/year compliance overhead somewhere around $40,000-60,000+ in net income, but run your own numbers rather than trusting a rule of thumb.

What is a 'reasonable salary' and why does it matter?

The IRS requires S-Corp owner-employees to pay themselves a salary reflecting what a similarly-qualified employee would earn for the work performed — check BLS wage data or an industry salary survey. Setting it artificially low to maximize the tax-free distribution is a well-documented audit trigger; the IRS has successfully reclassified distributions as wages, with back payroll taxes and penalties, in cases where the salary was clearly unreasonable.

Are there downsides to electing S-Corp status?

Yes — ongoing payroll administration, additional tax filings (Form 1120-S), typically higher accounting fees, and in some states additional franchise taxes or fees. For inconsistent or seasonal income, running compliant payroll can also be more complicated than a sole proprietor's flexible cash-flow approach.

A $150K Freelance Consultant Saves Real Money Electing S-Corp Status at a $70K Salary

We ran a $150,000 net-income freelance consultant through the calculator with a $70,000 reasonable salary. As a sole proprietor, the full $150,000 is subject to self-employment tax. Electing S-Corp status and paying that $70,000 salary shrinks the payroll-tax base to just the salary — the remaining $80,000 flows through as a distribution, taxed as ordinary income only. Even after a realistic $3,000/year compliance cost, the S-Corp election comes out ahead by a wide margin in this scenario.

The two paths, compared

	Sole prop / default LLC	S-Corp election
Amount subject to payroll/SE tax	$150,000 (× 92.35% SE base)	$70,000 (salary only)
Amount taxed as ordinary income only	—	$80,000 (distribution)
Extra annual overhead	—	Payroll service + accounting (~$3,000)

The core mechanic: self-employment tax applies to 92.35% of net earnings under Schedule SE rules, covering the full $150,000. Under S-Corp election, the same combined payroll-tax rate applies only to the $70,000 W-2 salary — the $80,000 distribution skips payroll tax entirely, taxed only as ordinary income (the same treatment it would get either way, so there’s no double-counting; the savings come purely from what payroll tax doesn’t touch).

Why this isn’t free money

The savings come with real overhead and real risk if done carelessly. Running compliant payroll means regular wage payments, quarterly payroll tax filings, and typically higher accounting fees than a simple Schedule C sole-proprietor return — commonly $2,000-4,000+ per year depending on your state and how much you outsource. And the “reasonable salary” figure isn’t a number you get to pick freely: it has to reflect what a similarly-qualified employee would actually earn for the work performed. The IRS has a documented history of reclassifying artificially low S-Corp salaries as wages after audit, with back payroll taxes and penalties attached — the savings only hold up if the salary figure would survive that scrutiny.

Where this framework doesn’t apply

Your net income is too low to clear the compliance overhead. Below roughly $40,000-60,000 in net income (a rough planning range, not a hard cutoff), the payroll-tax savings often don’t clear a realistic compliance cost — run your own numbers rather than assuming a threshold.
You can’t defend a genuinely reasonable salary. If a defensible salary for your role would eat most or all of your net income, there’s little distribution left to shelter from payroll tax, and the election isn’t worth the added complexity.
Your income is inconsistent or seasonal. S-Corp payroll requires regular wage payments regardless of that month’s cash flow — a fluctuating income stream makes this materially more complicated to administer than a sole proprietor’s flexible approach.
You’re still validating the business. Many advisors suggest waiting until income is stable and predictable before adding S-Corp administrative overhead on top of an already-uncertain early-stage business.

What to actually do

Run the numbers at your actual net income and a genuinely defensible reasonable-salary figure — check BLS wage data or an industry salary survey for your specific role.
Get real quotes for payroll service and any additional accounting/tax-prep cost, rather than guessing the compliance overhead.
If the math favors S-Corp election, talk to a CPA about the mechanics — electing via Form 2553, setting up payroll, and the ongoing filing requirements.
Revisit the reasonable-salary figure annually as your business (and the market rate for the role) changes.
Factor in your specific state’s rules — some states layer additional S-Corp franchise taxes or fees on top of the federal picture.

For the rate decision that determines your net business income in the first place, see what freelancers get wrong about self-employment tax, and for the related question of what salary your business can safely pay you, see the founder-salary paying-yourself trap.

Open the S-Corp Election Calculator → and run your own net income, salary, and compliance-cost numbers.