This is the decision people most often mean when they say they need a CPA — and the one most often framed incorrectly. It is not "LLC or S-Corp," because those are not two things of the same kind.
The framing that clears it up: an LLC is a legal entity you form with the state. An S-Corp is a federal tax election you make with the IRS. You do not choose between them — you form an LLC, then decide whether to elect S-Corp taxation on top of it. The real question is not which entity, but how the profits get taxed.
What the election actually changes
By default, a single-member LLC's profit flows to your personal return and the whole of it is exposed to self-employment tax — the combined Social Security and Medicare contribution that an employer and employee would otherwise split. On a profitable business, that is frequently the largest single line on the tax bill.
Elect S-Corp treatment and the profit splits in two. You pay yourself a salary through actual payroll, and payroll taxes apply to it. Whatever remains can be taken as a distribution, which is not subject to self-employment tax. The saving is the payroll tax you avoid on that second portion.
That is the entire mechanism. Everything else in this decision is a consequence of it.
The trade-off at a glance
| LLC (default taxation) | LLC with S-Corp election | |
|---|---|---|
| Self-employment tax applies to | All net profit | Your salary only |
| Payroll required | No | Yes — real payroll, filings, and deadlines |
| Business tax return | Usually reported on your personal return | Separate return for the business |
| Ongoing admin burden | Low | Meaningfully higher — this is the real cost |
| Main risk to get wrong | Overpaying on profit | An indefensibly low salary drawing IRS attention |
| Liability protection | From the LLC — unchanged either way | From the LLC — unchanged either way |
Note the last row. The S-Corp election has no bearing on liability protection — that comes from the LLC and from how carefully you keep business and personal finances separate. Anyone selling you an S-Corp election on liability grounds has it wrong.
Why there is no universal profit threshold
You will see specific numbers quoted confidently. Treat them as folklore. The savings depend on how much profit you could defensibly take as a distribution rather than salary, and that turns on what your role is actually worth in your industry and market — which varies enormously. The added costs, meanwhile, are close to fixed no matter the size of the business.
So the break-even is a calculation with your numbers in it, not a number someone can hand you. What is universally true is the shapeof it: below some profit level the election costs more than it saves, and above it the gap widens in your favour. Finding where that line sits for you is an hour of a CPA's time and is the single highest-return question you can bring to one.
The reasonable-salary problem
Because only the salary is exposed to payroll tax, an S-Corp owner has an obvious incentive to set that salary low. The IRS is thoroughly aware of this. You are required to pay yourself reasonable compensation for the work you actually perform, and a salary that is implausibly small relative to the profit is a well-known audit trigger.
"Reasonable" is a facts-and-circumstances judgment — what someone would be paid to do your job, given your industry, hours, duties, and market. It is defensible when it is documented and reasoned, and indefensible when it was reverse-engineered from the tax saving you wanted. This is the part where a CPA earns the fee, and the part where cheap advice becomes expensive.
Signs the election is probably worth pricing out
- Profit is consistent, not a one-off spike. Making the election for a single unusual year rarely pays, given the revocation rules.
- The profit meaningfully exceeds what you would have to pay someone to do your job. That gap is the only thing the election acts on.
- Your books are already in decent shape. S-Corp treatment demands cleaner records; starting from messy books means paying to fix those first.
- You are prepared to run real payroll every month. Not intending to — actually doing it, on schedule.
Signs it is not the right move yet
- Profit is modest or unpredictable, so the fixed costs dominate.
- You are reinvesting nearly everything and taking little out.
- Your bookkeeping is behind — fix that first; it is cheaper and it is a prerequisite either way. Our bookkeeper vs. CPA guide covers where to start.
- You want the simplest possible admin and are willing to pay something for that. This is a legitimate choice, not a mistake.
This guide is general information, not tax or legal advice. Entity and election decisions depend on your specific facts, and tax rules change — including at the Alabama state level. Confirm the current treatment with a licensed CPA before filing anything.
Frequently asked questions
Is an S-Corp a different business entity than an LLC?
No — and this is the most common point of confusion. S-Corp is a federal tax election, not an entity type. You form an LLC (or a corporation) with the Alabama Secretary of State, then separately elect S-Corp taxation with the IRS. Your LLC stays an LLC in the eyes of Alabama; only how its profits are taxed changes.
At what profit does an S-Corp election start making sense?
There is no statutory threshold, and any specific number you see quoted is a rule of thumb rather than a rule. The logic is that the savings scale with the profit you can reasonably take as a distribution instead of salary, while the added costs — payroll processing, a separate business return, more bookkeeping — are roughly fixed. Below some profit level the fixed costs eat the savings entirely. A CPA can run your actual numbers in an hour, and that is the only version of this answer worth acting on.
What is a "reasonable salary" and why does it matter so much?
If you elect S-Corp treatment, you must pay yourself a reasonable salary for the work you do before taking any remaining profit as a distribution. That salary is subject to payroll taxes; the distribution is not. The temptation is to set the salary as low as possible, and that is exactly what the IRS scrutinizes. An unreasonably low salary is one of the more common triggers for a challenge, and losing that argument means back taxes and penalties.
Does Alabama tax S-Corps differently than LLCs?
Alabama generally follows the federal treatment: profits pass through to owners and are taxed on their individual Alabama return. But entity type and elections can affect state-level filing obligations, so the state consequences are worth confirming rather than assuming. Ask your CPA specifically what your Alabama filings look like before and after an election.
Can I undo an S-Corp election if it turns out to be wrong?
You can revoke it, but not freely — there are timing rules, and once revoked there are restrictions on re-electing for a period of years. That asymmetry is a good reason to model the decision before filing rather than treating it as an experiment. Get the projection done first.
Do I need a CPA for this, or can I just file the form?
Filing Form 2553 is simple. Knowing whether you should, setting a defensible salary, running payroll correctly, and filing the resulting return are not. The election is the easiest part of the decision and the smallest part of the work — most of the cost and most of the risk comes afterward.
Get the numbers run on your business
This decision rewards an hour with someone who can model it properly. Every CPA in this directory holds an active Alabama license.