When to Switch to an S Corp, and How the Change Works
The profit level where S status starts paying, the costs that come with it, and the mechanics of converting a sole proprietorship or LLC.
Reviewed by the Fairlight Accounting cross-border tax team — U.S. & Canadian Tax Desks
An S corporation election lets a business owner split profit into a salary, which carries payroll tax, and distributions, which do not. It pays off once profit comfortably exceeds a reasonable salary plus the extra costs of payroll and a separate return. An LLC elects by filing Form 2553; a sole proprietor must first form an entity.
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When do the savings outweigh the costs?
The saving is roughly 15.3 percent self-employment tax on the profit above your reasonable salary (less above the Social Security wage base). The costs are a payroll service, a separate Form 1120-S, state filings, and in some states extra entity taxes. Because reasonable salary rises with profit, there is no single threshold — but owners with modest profit, or whose profit is almost entirely their own labor, often save little.
| Factor | Pushes toward electing | Pushes against |
|---|---|---|
| Profit well above a market salary for your role | ✓ | |
| Stable, predictable profit | ✓ | |
| Business still losing money | ✓ | |
| State that taxes or ignores S status (for example, New York City, the District of Columbia, Tennessee) | ✓ | |
| Owner wants to maximize retirement contributions based on all profit | ✓ | |
| Qualified business income deduction limited by wages above the income threshold | ✓ |
How do the mechanics differ by starting point?
- Single-member or multi-member LLC. File Form 2553. The LLC is treated as electing corporate status and S status together; no new entity is needed.
- Sole proprietorship. Form an LLC or corporation under state law, obtain an employer identification number if needed, move bank accounts and contracts, then file Form 2553.
- Existing C corporation. File Form 2553; watch the built-in gains tax and any old C corporation earnings.
What are the deadlines?
Form 2553 is due no more than two months and 15 days after the start of the tax year the election is to take effect — March 15 for an existing calendar-year business — or it can be filed at any time during the preceding tax year. An election filed later generally starts the next year, unless late-election relief under Revenue Procedure 2013-30 applies; that relief generally must be requested within three years and 75 days of the intended effective date. All shareholders must consent.
What happens in a mid-year switch?
An LLC that elects effective partway through a year files two returns for that year: a Schedule C (or partnership return) for the months before and Form 1120-S for the months after. Payroll for the owner starts on the effective date.
What changes after the election?
You run payroll for yourself, deposit withholding, and file quarterly payroll returns. Personal expenses should no longer run through the business account; use an accountable plan for reimbursements. Health insurance premiums go through payroll to keep the deduction.
Frequently asked questions
Can I revoke the election later?
Yes, with consent of shareholders holding more than half the shares. After a revocation, the corporation generally cannot re-elect, without IRS consent, for any tax year before the fifth tax year after the first year the revocation took effect.
Does the election change my liability protection?
No. Liability protection comes from the LLC or corporation under state law, not from the tax election.
Do I still need an operating agreement?
Yes. S corporations allow only one class of stock, so LLC agreements with preferred returns or uneven distributions should be reviewed before electing.
Can non-U.S. residents own an S corporation?
Not if they are nonresident aliens — a nonresident alien shareholder terminates the election. A U.S. citizen living abroad can still be a shareholder.
Official sources
The IRS explains: “A corporation or other entity eligible to be treated as a corporation files this form to make an election under section 1362(a) to be an S corporation.” — Internal Revenue Service, About Form 2553, Election by a Small Business Corporation, https://www.irs.gov/forms-pubs/about-form-2553
The IRS explains: “In order to become an S corporation, the corporation must submit Form 2553, Election by a Small Business Corporation signed by all the shareholders.” — Internal Revenue Service, S corporations, https://www.irs.gov/businesses/small-businesses-self-employed/s-corporations
Next step
Fairlight Accounting handles U.S. domestic, cross-border (U.S.–Canada), and international tax returns, plus bookkeeping, payroll, and CFO advisory. Our U.S. Tax Desk runs the before-and-after numbers and handles the election and payroll setup. See pricing or book a free fit call.
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