What an S-corporation actually is
An S-corporation isn't a type of company. It's a tax election. You form an LLC (or sometimes a C-corporation), and then you tell the IRS — via Form 2553 — that you'd like the entity taxed as an S-corporation instead of the default. The entity's legal structure doesn't change. Your operating agreement doesn't change. What changes is how income flows to your personal return.
The key difference: an S-corp splits your business income into two buckets. A reasonable salary (W-2 wages) and a distribution. The salary is subject to payroll tax (15.3% Social Security + Medicare). The distribution is NOT subject to payroll tax. That's the entire savings mechanism.
The default vs the S-election in one comparison
Single-member LLCs default to Schedule C taxation — every dollar of business income gets hit with self-employment tax (~15.3%) plus regular income tax. Multi-member LLCs default to partnership taxation, which works similarly. The S-corp election changes both. You become an employee of your own business AND an owner. The IRS lets you pay yourself a "reasonable" salary as the employee, then take the rest as distributions which avoid the SE tax bite.
What it's NOT
An S-corp election is NOT an entity type — you can't form an "S-corporation" the way you form an LLC. It's a tax classification layered on top of an existing entity. The IRS treats your LLC as if it were an S-corp for tax purposes only. State law and operating-agreement law still see you as an LLC.
Deeper read: How the S-Corp Election Actually Works · LLC vs. S-Corp vs. C-Corp: Which Fits?
The tax math (where the savings come from)
The math is mechanical. Below $50K of net business income, an S-corp election usually LOSES money for the owner — payroll service costs + extra return prep exceed the SE tax savings. Above $75K, the math turns positive and stays positive linearly.
-
~$5,400
Net savings at $100K
after payroll + prep
-
~$11,500
Net savings at $200K
after overhead
-
~$15,200
Net savings at $400K
after overhead
Worked examples below. Your real break-even comes from a 15-minute Tax Discovery call.
Worked example at $100K net
Schedule C path: $14,130 SE tax + ~$12,500 federal income tax = $26,630 total federal. S-corp path with $55K reasonable comp + $45K distribution: $8,415 payroll tax + ~$11,000 federal income tax (with QBI on the distribution) = $19,415 total federal. Annual savings: ~$7,215. After Gusto ($1,800/yr) and extra return prep: ~$5,400 net savings.
Worked example at $200K net
Schedule C: $23,675 SE tax + ~$36,500 federal income tax = $60,175 total. S-corp with $90K comp + $110K distribution: $13,770 payroll tax + ~$32,800 federal income tax (QBI applied) = $46,570 total. Annual savings: ~$13,605. Net of overhead: ~$11,500.
Worked example at $400K net
Schedule C: $33,170 SE tax (capped at the wage base) + ~$103,000 federal income tax = $136,170 total. S-corp with $150K comp + $250K distribution: $22,950 payroll tax + ~$95,800 federal income tax = $118,750 total. Annual savings: ~$17,420. Net of overhead: ~$15,200.
Just so you know — these are simplified. State tax, your specific reasonable comp range, existing retirement contributions, and spouse income all move the number. The Tax Discovery call gives you your real break-even in 15 minutes.
Deeper read: LLC vs. S-Corp: The Tax Math by Income Level · When to Elect: Income Thresholds + Business Types
When to elect (and when not to)
The break-even threshold is the wrong question to start with. The right question is "do I have a stable, operating business that I'll run for 3+ years AND that produces enough net income that the payroll mechanics pay for themselves?" If yes, elect. If no, stay where you are.
Convert if all of these are true
- Net business income $50K–$75K+ (after expenses, before owner comp)
- Operating business — services, retail, contractors, agencies. Not a rental real estate LLC.
- Stable income year over year — S-corp reasonable comp doesn't flex easily, wild swings make payroll planning painful
- You can run real payroll via Gusto, ADP, or similar
- You're committed for 3+ years — S-corp revocation is messy
Don't convert if any of these are true
- Net income under $50K — payroll overhead exceeds the SE tax savings
- Rental real estate LLC — losses, §1031, basis, depreciation all work better outside an S-corp
- Side hustle that may not last — S-corp commits you to running payroll + filing 1120-S annually
- Already an S-corp via Florida/Nevada/Wyoming "anonymity" shell — these usually need cleanup
- You want passive income classification — S-corp distributions are still active for QBI + passive loss rules
Deeper read: When to Elect S-Corp: Income Thresholds, Business Types, and Lifecycle Moments
How to elect (Form 2553 + late relief)
The election itself is one form. Form 2553. One page. The deadline rules are where it gets nuanced.
The 75-day rule
To take effect for the current tax year, Form 2553 must be filed within 75 days of the entity's tax year start. For a calendar-year LLC, that's by March 15. Miss the window and the election moves to the following tax year unless you qualify for late-election relief.
Late-election relief — Rev. Proc. 2013-30
If you missed the 75-day window but have been operating as if you were an S-corp (paying yourself reasonable comp, taking distributions, filing 1120-S in your head), you can request late-election relief under Rev. Proc. 2013-30. The IRS grants it about 95% of the time when properly documented. "Properly documented" is doing the heavy lifting in that sentence — most DIY late-election filings fail because the reasonable-cause statement is weak or the operating-as-S-corp attestation is missing.
State-level conformity
Texas is automatic — file your federal Form 2553 and Texas honors it. California requires a separate Form 100S election. New York requires CT-6. Several other states have their own quirks. Most DIY filings miss the state-level step entirely. Result: you're an S-corp federally but a regular LLC at the state level, and the math breaks.
Deeper read: Form 2553 Step-by-Step · Late S-Corp Election Relief: Rev. Proc. 2013-30 · Mid-Year Election: Effective Date Strategy
Reasonable compensation (the number that makes or breaks the election)
The IRS doesn't tell you what your reasonable comp number is. They tell you what factors they'll use to challenge whatever number you pick. The factors come from a series of court cases — Watson v. Commissioner is the canonical one. They look at: your training and experience, the duties you perform, time devoted to the business, the company's complexity, comparable salaries in your industry, payment history, employment agreements, and how your compensation compares to dividends/distributions.
Three methods that work
- RCReports — paid tool that pulls comp data from BLS, Salary.com, and proprietary surveys, then runs it through an IRS-defensible methodology. Costs ~$200/year, generates a report you can hand to an IRS examiner.
- BLS Occupational Employment Statistics — free, but you have to do the research. Look up your specific SOC code (e.g., 11-9111 Medical Services Manager) and pull the local-area median + 75th percentile. Document your methodology.
- Survey-based benchmarking — industry-association surveys, state CPA society reports, etc. Usable but harder to defend than RCReports or BLS.
The number that gets you in trouble
"I'll pay myself $20K and distribute $180K — saves a fortune!" Yeah, until the IRS reclassifies the distributions as wages and you owe back payroll tax + penalties + interest. The pattern we see most: reasonable comp set at 10-15% of net income. Defensible reasonable comp is usually 40-60% for a service business where the owner is the primary value driver.
Deeper read: How to Set Reasonable Comp Right · IRS Factors + Case Law + Defensible Benchmarks · Documentation: RCReports, BLS, Survey Methods
How to operate an S-corporation
Election is the easy part. Operating one correctly is where most DIYers fail. Five things have to happen on an ongoing basis.
1. Run real payroll (every period)
The IRS expects regular, documented owner comp — not a single December check. Bi-weekly or monthly is standard. Gusto is what we recommend for solo-shareholder S-corps — built for it, handles 2%-shareholder health insurance correctly, files quarterly + annual payroll returns automatically.
2. Track shareholder basis (forever)
Basis = your initial investment + cumulative income - cumulative losses - cumulative distributions. It matters because distributions in excess of basis become capital gains. Suspended losses can't be claimed without sufficient basis. Form 7203 has been mandatory since 2021. Most DIY S-corp filers don't even know it exists.
3. Set up an accountable plan
Lets you reimburse yourself tax-free for home office, vehicle, phone, and travel expenses. The corporation deducts the reimbursement, you receive it tax-free. Without an accountable plan, those reimbursements are taxable wages.
4. Maintain single-class-of-stock compliance
S-corps can have only one class of stock. Distributions must be proportional to ownership. If you have a partner and you take a draw they don't, you can void the entire election. The IRS calls this "disproportionate distribution" — single biggest accidental S-corp termination cause.
5. Handle 2%-shareholder health insurance correctly
Health insurance premiums for >2% shareholders add back to W-2 Box 1, then deduct above-the-line on the 1040 via §162(l). Done wrong, you lose the deduction OR trigger payroll-tax adjustments. Gusto handles this correctly if you flag the shareholder status.
Deeper read: Owner W-2 Setup: Gusto Walkthrough · Distributions, Draws, and Salary · Shareholder Basis Tracking · Accountable Plan: Tax-Free Reimbursements · Health Insurance for >2% Shareholders
Retirement stacking (the secondary tax shelter)
This is the part most S-corp owners miss. The Solo 401(k) on an S-corp lets you stack $24,500 in employee deferrals plus 25% of W-2 wages in employer profit-sharing — up to $72,000 combined in 2026. Schedule C is capped at SEP-IRA's 20% of net. For a $100K W-2-paying owner, that's roughly $25,000/year MORE in tax-deferred contributions vs Schedule C with a SEP.
Layer a cash balance plan on top
For owners over 45 with consistent income, a cash balance plan stacks on top of the Solo 401(k) and can shelter $100K–$200K+ in additional contributions. The math depends on age + comp; the planning is worth running every year if your taxable income is above $400K.
Deeper read: S-Corp + Solo 401(k) Stacking · Solo 401(k) vs SEP-IRA
Common mistakes (from our cleanup engagements)
- Reasonable comp set too low. We've seen $40K+ adjustments on single-year audits when the IRS reclassifies distributions as wages.
- No actual payroll running. Owner takes "draws" all year, calls them distributions at year-end. The IRS calls them wages.
- Distributions in excess of basis. Three years later the K-1 shows a $50K+ surprise capital gain.
- Form 7203 missing. Mandatory since 2021. Most DIY filers don't know it exists.
- Late S-elections filed wrong. Missing the reasonable-cause statement or the operating-as-S-corp attestation. IRS denies, and you're stuck filing as the wrong entity for years.
- Missing state conformity election. Federal S-corp but state regular LLC = the math breaks.
- Disproportionate distributions on a multi-owner S-corp. Voids the election. You owe corporate tax on prior years.
How we handle S-corp work at ETS
Our standard S-corp engagement covers the full lifecycle: diagnostic (does it even make sense?), election filing (Form 2553 + state conformity), implementation (payroll, accountable plan, basis init), and ongoing compliance (annual 1120-S + 1040, quarterly check-ins, reasonable comp review). We don't do partial S-corp work — every preparer who does Form 2553 in March and then doesn't help with payroll setup is the reason most DIY S-corps go sideways.
Tax Analysis is $2,500 (credits to engagement). Comprehensive tier with full conversion + Year 1 is $8,000–$15,000 depending on complexity. Annual retainer Year 2+ is $6,000–$12,000. Same pricing on the website as on the call.