The S-corp election is the most-overhyped and the most-undersold tax move for solo founders, depending on who's selling it. The truth: it's a real SE-tax saver, but only past a clear income threshold, and only if you're willing to run actual payroll.
Here's the math, the costs, and the break-even point.
What an S-corp election actually does
You start as a sole prop or single-member LLC. You file Form 2553 with the IRS and elect S-corp tax treatment. Now:
- You're an employee of your own corporation.
- You pay yourself a W-2 salary ("reasonable compensation"). FICA applies (15.3%, half from you, half from the corp — same total).
- Profits above your salary flow through as distributions. No SE tax on distributions.
That's the whole point. The salary portion still pays full FICA. The distribution portion saves the 15.3%.
The break-even calculation
Compare two paths at the same gross profit:
Sole prop:
Net SE profit = $100,000
SE tax (15.3% × 92.35%) = $14,130
Half-deduction Schedule 1 = $7,065
Net SE tax after deduction = $14,130 (paid in full; deduction reduces income tax, not SE tax)
S-corp at $60K reasonable salary:
W-2 salary = $60,000
FICA (employer + employee) = $9,180 ← total FICA on $60K
Distribution = $40,000 ← no SE tax / FICA
S-corp filing fee (Form 1120-S)
Payroll service ≈ $500–$1,200/yr
Total payroll burden ≈ $9,180 + $1,200 = $10,380
Saving vs sole prop = $14,130 − $10,380 = $3,750
At $100K of profit and a $60K salary, the S-corp saves ~$3,750/yr before considering the cost of a CPA to do the 1120-S return (typically $800–$1,500).
After CPA fees: ~$2,500–$3,000/yr saved. Worth it.
At $50K of profit: the salary needs to absorb most of the income, and the savings collapse. Not worth it.
At $200K of profit: salary maybe $100K, distribution $100K, savings on the distribution at 15.3% = $15,300. Net of payroll + CPA = ~$13,000–$14,000/yr saved. Big win.
The break-even threshold
The widely-cited rule of thumb is $60K–$80K of consistent net profit. Below that, the friction (payroll, separate return, accounting complexity) eats the savings.
Refinements:
- Higher break-even if you're in a state with high franchise / minimum LLC fees (CA: $800/yr minimum franchise tax for S-corps + LLCs)
- Lower break-even if you'd outsource bookkeeping anyway — the marginal cost is just the 1120-S
- Skip entirely if income is volatile — switching back from S-corp is annoying; if you might have a $30K year next year, the S-corp becomes a tax burden, not a benefit
What "reasonable compensation" means
The IRS requires S-corp owner-employees to take "reasonable" salary before distributions. Underpay yourself, and the IRS can re-characterize your distributions as wages — back FICA, plus interest, plus penalty.
Factors the IRS considers:
- What you'd pay an outsider to do your job
- Comparable salaries in your geography
- Time spent on the business
- Skill level and responsibility
The 60% rule (60% of net profit as salary, 40% as distribution) is a heuristic, not a regulation. The Tax Court has accepted lower salaries when supported by a market-based analysis.
For more, see reasonable comp for S-corp owners.
What it costs to operate
| Cost | Frequency | Range | |---|---|---| | Form 2553 election | One-time | Free (IRS form) | | Articles of incorporation (state) | One-time | $50–$800 | | Registered agent | Annual | $100–$300 | | Payroll service (Gusto, Justworks) | Monthly | $40–$100 | | 1120-S preparation | Annual | $800–$2,000 | | State franchise tax | Annual | $0–$800+ (varies) | | Bookkeeping (separate from personal) | Ongoing | varies |
Total annual operating cost: usually $1,500–$3,500. Subtract this from your projected SE-tax savings to find your real break-even.
What you give up
- Simplicity. Sole-prop accounting is one Schedule C. S-corp is a separate 1120-S, a K-1, and personal payroll. The mental overhead is real.
- QBI deduction quirks. The 20% §199A deduction applies to both, but the salary portion of S-corp income is not QBI-eligible. At very high incomes this can claw back some of the SE-tax savings.
- Solo 401(k) simplicity. Possible with both, but the math differs. As a sole prop you contribute as both employer and employee from one income figure. As an S-corp, employee contribution comes from W-2 salary; employer contribution is up to 25% of W-2 salary. If your salary is set low, your retirement contribution capacity drops.
- Health insurance complexity. S-corp shareholders >2% must include health insurance premiums in W-2 wages and then deduct them on Schedule 1 — a pass-through that's easy to mess up.
When NOT to elect
- Profit consistently below $60K
- Profit highly variable year to year
- Heavy employer 401(k) contributions you want maximized
- You're outside the U.S. for tax-residence reasons (S-corp shareholders must be U.S. citizens or residents)
- You don't want to run payroll
How ExpenseGhost helps
ExpenseGhost projects S-corp savings against your live profit data and lets you toggle between sole-prop and S-corp scenarios. The system prompts you with a break-even reading every quarter once you cross $50K in trailing-12-month profit. See the tax dashboard.
FAQ
When can I elect S-corp status?
By March 15 to be effective for the current tax year. After March 15, the election is effective for next year — though you can request late-election relief under Rev. Proc. 2013-30 if you have reasonable cause.
Can I revoke the S-corp election?
Yes, but you generally can't re-elect for 5 years. Don't elect on a whim.
Do I need a separate bank account?
Yes — and not just for S-corp. Even sole props benefit from one. See Plaid for sole props: business vs personal split.
What about state taxes?
Most states recognize S-corp status, but a few (California, Tennessee) impose franchise / excise tax on S-corps that erodes the savings. Check your state.
Can I be an S-corp and a sole prop simultaneously?
Yes — different lines of business, different tax treatment. The S-corp's losses don't offset Schedule C income at the entity level, but they do flow to the same 1040.
ExpenseGhost provides tax estimates and tax-ready exports. We are not a tax preparer and do not file returns. Estimates are informational — verify every number with a licensed tax professional before filing.