Related guides: LLC vs sole proprietorship · What is Schedule C? · Self-employed tax deductions · How to file freelance taxes · Solo 401k vs SEP IRA
Quick answer: the $40K rule of thumb
If your business nets less than $40,000 in annual profit, stay as an LLC (or sole proprietorship). The tax savings from an S-Corp election won't cover the added costs — payroll processing, additional tax returns, and administrative overhead. Below $40K, you're paying more to maintain the S-Corp than you're saving in self-employment tax.
If your business consistently nets $40,000–$60,000+, the S-Corp election starts saving real money. At $60K profit, you'll save roughly $3,000–$5,000/year in self-employment tax. At $100K profit, the savings jump to approximately $7,650/year. The higher your profit, the more the S-Corp saves — because the savings come from splitting your income into salary (subject to SE tax) and distributions (not subject to SE tax).
This is a rule of thumb, not a law. Your specific break-even point depends on your state's taxes, your payroll costs, and how much you can reasonably pay yourself as salary. But $40K is the line where most CPAs say the conversation becomes worth having.
Key differences: LLC vs S-Corp tax treatment
| Factor | LLC (default) | LLC with S-Corp election |
|---|---|---|
| Self-employment tax | 15.3% on all net profit | 15.3% only on your salary (not distributions) |
| How you pay yourself | Owner's draw (simple) | W-2 salary + distributions (requires payroll) |
| Payroll required? | No | Yes — must run payroll and pay yourself a "reasonable salary" |
| Tax returns | Schedule C on your 1040 | Separate S-Corp return (Form 1120-S) + your 1040 |
| Annual cost of compliance | $0–$200 (state filing fees) | $1,000–$3,000 (payroll service + CPA for S-Corp return) |
| Quarterly estimated taxes | Yes, based on net profit | Income tax withheld from salary; estimated taxes on distributions |
| QBI deduction (20%) | Applies to net Schedule C income | Applies to S-Corp income (salary + distributions), same rules |
| Liability protection | Yes (LLC protects personal assets) | Same — the LLC still exists as the legal entity |
| Complexity | Low | Moderate — payroll, additional return, reasonable salary determination |
The core difference is simple: as a default LLC, you pay 15.3% self-employment tax on all net profit. With an S-Corp election, you pay yourself a "reasonable salary" (subject to payroll taxes, which are equivalent to SE tax) and take the remaining profit as distributions, which are not subject to the 15.3% SE tax. The distributions are still subject to income tax — you don't avoid income tax, only the self-employment/payroll tax on the distribution portion.
If you haven't yet formed an LLC and are still operating as a sole proprietor, start with our LLC vs sole proprietorship guide to understand whether the LLC itself is worth forming first.
Tax savings example: $100K profit, step by step
Let's walk through a concrete example. You're a freelance consultant whose LLC earns $100,000 in net profit after all business deductions.
Scenario A: LLC (default tax treatment)
| Line item | Amount |
|---|---|
| Net profit | $100,000 |
| SE tax base (92.35% of net profit) | $92,350 |
| Self-employment tax (15.3%) | $14,130 |
| SE tax deduction (50% of SE tax) | –$7,065 |
| Adjusted gross income | $92,935 |
You pay $14,130 in self-employment tax. This is on top of your income tax.
Scenario B: LLC with S-Corp election (reasonable salary: $50,000)
| Line item | Amount |
|---|---|
| Net profit | $100,000 |
| Reasonable salary (W-2) | $50,000 |
| Distribution (not subject to SE tax) | $50,000 |
| Payroll taxes on salary (15.3% employer + employee combined) | $7,650 |
| Payroll taxes on distribution | $0 |
| Additional costs: payroll service + S-Corp return | ~$1,500–$2,500 |
Total payroll/SE tax: $7,650 (vs. $14,130 as default LLC). That's a savings of approximately $6,480 per year in self-employment tax — minus the $1,500–$2,500 in additional compliance costs, for a net savings of roughly $4,000–$5,000/year.
At $150K profit with a $60K salary, the savings grow to roughly $10,000 in SE tax reduction. At $200K profit, you're saving $13,000+. The math gets better as income grows because the distribution portion (not subject to SE tax) gets larger.
Amazon sellers and e-commerce business owners face the same S-Corp decision point — BagEngine's guide to Amazon FBA business structures walks through how S-Corp elections apply specifically to product-based businesses with inventory and higher revenue thresholds.
When to stay LLC vs. elect S-Corp
Stay as a default LLC if:
- Your net profit is under $40K. The $1,500–$2,500/year in payroll and S-Corp tax return costs eat most or all of your SE tax savings.
- Your income is unpredictable. S-Corp salary must be paid consistently regardless of business cash flow. If you have feast-or-famine months, managing payroll adds stress and cash flow risk.
- You value simplicity above all. An S-Corp adds a separate tax return (Form 1120-S), payroll processing, W-2 issuance, and quarterly payroll tax deposits. If you're already overwhelmed by filing freelance taxes, adding S-Corp complexity may not be worth the savings.
- You plan to contribute maximum to a Solo 401(k). S-Corp salary reduces the employer contribution portion of your Solo 401(k) since it's based on W-2 wages rather than net SE income. Run both scenarios with your CPA before electing.
- Your state taxes S-Corps unfavorably. California charges an $800 minimum franchise tax plus a 1.5% S-Corp tax on net income. New York City imposes additional taxes on S-Corps. Some states make the math worse.
Elect S-Corp if:
- Your net profit consistently exceeds $50K–$60K. At this level, annual SE tax savings of $3,000–$5,000 clearly exceed compliance costs.
- Your income is stable and predictable. Consistent revenue makes payroll management straightforward. Monthly or biweekly salary payments are easy to plan.
- You already work with a CPA or bookkeeper. The incremental cost of an S-Corp return is lower when you already have a tax professional. Many CPAs charge $500–$1,000 more for the 1120-S on top of your 1040.
- You're comfortable with payroll. Services like Gusto ($40/mo), QuickBooks Payroll ($45/mo), or Wave Payroll handle everything — tax withholding, W-2 generation, payroll tax deposits. The setup takes 30 minutes.
How to make the election
File IRS Form 2553 (Election by a Small Business Corporation). For a new LLC, file within 75 days of formation. For an existing LLC switching mid-year, file by March 15 of the tax year you want the election to take effect. Late elections are sometimes accepted with reasonable cause, but don't count on it — file on time.
You can also elect S-Corp treatment retroactively for the current tax year if you file Form 2553 with a reasonable cause statement. The IRS has been lenient about late elections in recent years, but working with a CPA ensures the paperwork is handled correctly.
Frequently asked questions
Can a single-member LLC elect S-Corp status?
Yes. A single-member LLC can elect S-Corp tax treatment by filing Form 2553. The LLC remains a single-member LLC for legal purposes — only the tax treatment changes. You'll pay yourself a W-2 salary and take remaining profits as distributions. This is the most common path for freelancers and solopreneurs who outgrow the default LLC tax structure.
Does an S-Corp election affect my liability protection?
No. The S-Corp election is purely a tax classification change. Your LLC's liability protection — separating personal assets from business debts and lawsuits — remains exactly the same. The legal entity (LLC) is unchanged; only the IRS tax treatment changes. You still need to maintain your LLC properly (separate bank accounts, operating agreement, state filings) to preserve liability protection.
What is a "reasonable salary" for an S-Corp owner?
A reasonable salary is what you'd be paid doing the same work as an employee of someone else's company. The IRS considers your job responsibilities, experience, hours worked, and comparable salaries in your industry and geographic area. There's no fixed percentage, but most CPAs recommend setting salary at 40–60% of net profit as a starting point, then adjusting based on market data. Sites like Glassdoor, PayScale, and the Bureau of Labor Statistics provide benchmarks. Setting your salary too low triggers IRS scrutiny — the penalty is reclassification of distributions as wages plus back payroll taxes, interest, and penalties.
Can I switch back from S-Corp to LLC default taxation?
Yes, but with restrictions. You can revoke the S-Corp election by filing a statement with the IRS (signed by shareholders holding more than 50% of shares). Once revoked, you cannot re-elect S-Corp status for 5 tax years without IRS consent. The revocation can be effective on a specific date or the first day of the next tax year. Most business owners who revoke do so because their income dropped below the break-even point or they want to simplify their tax situation.
How much does it cost to maintain an S-Corp annually?
Budget $1,500–$3,000/year for ongoing S-Corp compliance: $500–$1,200 for payroll processing (Gusto, QuickBooks Payroll, or ADP), $500–$1,500 for the additional S-Corp tax return (Form 1120-S) prepared by a CPA, and $0–$800 for state-specific franchise taxes or fees. California's $800 franchise tax is the most notable. Compare this total against your projected SE tax savings — if savings don't clearly exceed costs, stay as a default LLC.