S Corporation Taxes: How S-Corps Save Owners Money (and the Rules)

Business Taxes · BUSINESS TAXES

An S corporation lets business owners avoid self-employment tax on a portion of profits. Learn how S-corp taxation works, the reasonable-salary rule, and when electing S-corp status actually pays off.

An S corporation isn't a type of business — it's a tax election. Eligible corporations and LLCs can elect to be taxed under Subchapter S of the tax code, which lets profits 'pass through' to the owners' personal returns and, critically, can shield part of those profits from self-employment tax. For profitable small businesses, the S-corp election is one of the most powerful legal tax-saving tools available — but it comes with strict rules the IRS watches closely.

How S Corporation Taxation Works

An S corp is a pass-through entity: it generally pays no federal income tax itself. Instead, profits and losses flow through to shareholders, who report their share on their personal returns via a Schedule K-1. The key advantage over a sole proprietorship or partnership is how owner compensation is split:

• Owners who work in the business pay themselves a 'reasonable salary' (W-2 wages), which is subject to Social Security and Medicare (FICA) taxes
• Remaining profits are taken as distributions, which are NOT subject to self-employment or FICA tax

This split is where the savings come from — but only the salary portion builds Social Security credits.

The Reasonable Salary Rule

The IRS requires S-corp owner-employees to pay themselves a 'reasonable' salary before taking tax-free distributions. Paying an artificially low salary to dodge payroll taxes is one of the most common S-corp audit triggers. 'Reasonable' means what you'd pay someone else to do your job, considering your role, experience, time spent, and industry norms. If the IRS reclassifies distributions as wages, you'll owe back payroll taxes plus penalties and interest.

When the S-Corp Election Makes Sense

The S-corp election generally pays off once net profit is high enough that the payroll-tax savings exceed the added costs (payroll processing, a separate business return, and bookkeeping). A common rule of thumb is net profit of roughly $50,000–$80,000 or more, but the right threshold depends on your reasonable salary and state rules. Below that, the administrative cost often outweighs the benefit.

S-Corp Eligibility Requirements

Not every business can elect S-corp status. The entity must:

• Be a domestic corporation or LLC
• Have no more than 100 shareholders
• Have only allowed shareholders (U.S. individuals, certain trusts and estates — no partnerships, corporations, or nonresident aliens)
• Have only one class of stock

The election is made on Form 2553, generally within 75 days of formation or the start of the tax year you want it to apply.

Added Responsibilities of an S Corp

The tax savings come with paperwork. An S corp must run formal payroll for owner-employees, file a separate Form 1120-S each year, issue K-1s to shareholders, and maintain a clear separation between business and personal finances. Missing the payroll requirement or commingling funds can jeopardize the election and the liability protection.

Frequently Asked Questions

Does an S corporation pay federal income tax?

Generally no. An S corp is a pass-through entity — profits flow to shareholders, who pay tax on their personal returns. Some states do impose entity-level taxes or fees on S corps.

How much salary do I have to pay myself in an S corp?

A 'reasonable' salary — roughly what you'd pay someone else to do your job. There's no fixed percentage, but paying too little to avoid payroll tax is a major IRS audit trigger.

What's the tax benefit of an S corp versus an LLC?

A default LLC pays self-employment tax on all net profit. An S corp splits profit into salary (subject to payroll tax) and distributions (not subject to it), which can save thousands once profits are high enough.

When should I elect S-corp status?

Typically when net profit is high enough — often around $50,000+ — that payroll-tax savings outweigh the extra cost of payroll and a separate business return. A tax professional can run the numbers for your situation.

Can a single-member LLC be an S corp?

Yes. A single-member LLC can elect to be taxed as an S corporation by filing Form 2553, as long as it meets the eligibility rules.