LLC Vs S-Corp Tax Election: How To Choose The Right One For Your Business

An S-Corp election typically makes sense once your LLC's net profit exceeds roughly $60,000–$70,000 because the self-employment tax savings finally outweigh the added payroll and accounting costs; below that threshold, the default pass-through taxation is usually cheaper and simpler.

The S-corp tax election self-employment trigger

Under the default LLC tax status, the IRS treats all of your net profit as self-employment income. That means every dollar above your business expenses gets hit with the full 15.3% self-employment tax. This breaks down to 12.4% for Social Security and 2.9% for Medicare, calculated on 92.35% of your net earnings. A sole proprietor or single-member LLC pays this on the entire profit. There is no way to separate what is "salary" from what is "owner earnings." When you elect S-Corp taxation, you become a shareholder-employee. You must pay yourself a "reasonable salary" for the work you perform. That salary is subject to the same 15.3% wage tax. Any remaining profit flows through to you as a distribution. Distributions are completely free of self-employment tax. The key is that the salary must be defensible. If you own a consulting business and pay yourself a low salary while your company earns a much larger profit, the IRS will reclassify that underpayment and hit you with penalties. In practice, the salary typically lands between 40% and 60% of net profit for a working owner. The rest becomes untaxed-by-payroll distributions. This is the single sentence you will not find on a competitor’s page: the IRS has successfully reclassified S-Corp distributions as wages in personal-service audits, adding back taxes, penalties, and interest, so your salary must reflect what a comparable employee would earn for the same work.

The breakeven math most owners skip

Running an S-Corp is not free. You will need a wage-processing service to calculate and file employment taxes. Providers like Gusto currently charge a monthly fee, and you must check their website for the latest pricing. You must also pay federal unemployment tax (FUTA) at 0.6% of the first $7,000 of salary. You will file a separate corporate tax return (Form 1120-S). A CPA will charge a preparation fee, and you should request a current quote directly from your accountant. Add state-level franchise taxes or S-Corp filing fees that many states impose. Your state’s department of revenue publishes the current schedule of these fees on its official website. Now do the math on a $60,000 net profit. The self-employment tax savings from shifting $30,000 to distributions is roughly $4,590. Subtract the added administrative costs, and you net real savings. At $40,000 of profit, the savings drop to $3,060, but your costs stay nearly fixed, leaving you only a small margin barely worth the paperwork. At $30,000 of profit, you are losing money. The savings are wiped out by the costs, and that is before you waste a Saturday setting up wage processing. The failure case is electing too early. You file the S-Corp election, pay for a wage service, and then realize your profit dropped that year, leaving you with a net loss from the structure itself. To avoid this, book a consultation with a CPA before January 1st to project your annual profit. Arrive with your year-to-date profit-and-loss statement. Skip the DIY payroll setup and have the CPA run a breakeven analysis first.

When the answer is no

Three scenarios make the S-Corp election a clear mistake. First, if your net profit is consistently below $40,000, the wage service and CPA fees eat the savings. You are better off staying with default pass-through taxation. Second, if you also hold a W-2 job, your employer is already withholding Social Security tax on your wages. The Social Security portion of self-employment tax (12.4%) stops once your combined wages and self-employment income hit the Social Security wage base. The Social Security Administration sets this limit annually and publishes it on SSA.gov. If your W-2 salary already exceeds that cap, your LLC profit is only subject to the 2.9% Medicare tax. The S-Corp savings shrink to almost nothing. You would be paying administrative fees to save a tiny amount in Medicare tax. Third, if you run a service business where the IRS literally expects nearly all profit to be salary, the election backfires. For a solo lawyer, accountant, or consultant, the IRS takes the position that 100% of your net income is personal services income. A "reasonable salary" must be nearly the entire profit. That eliminates the distribution advantage entirely. You are left paying the same wage tax plus the extra corporate filing fees. The same logic applies if you have a partner and the two of you are doing all the revenue-generating work. The IRS will argue that your salary on the profit is unreasonable, and you will lose the audit.

Frequently Asked Questions

How long does it take to elect S-Corp status for my LLC?

You file Form 2553 with the IRS. The election must be submitted by March 15 of the tax year you want it to take effect for, or within 2.5 months of forming the LLC. If you miss that deadline, you can request a late election. File within 6 months of the original due date and attach a statement explaining the reasonable cause. To do this, download Form 2553 from IRS.gov, complete it with your CPA, and mail it via certified mail. Skip the online fax services and use the official IRS mailing address for your state.

Can I switch back from S-Corp to sole proprietorship later?

Yes, but the IRS imposes a five-year waiting period before you can re-elect S-Corp status after terminating it. You can revoke the election voluntarily. You must wait 5 years unless you get special IRS permission. Treat the decision as a long-term commitment. Before you revoke, book a tax-planning session with your CPA in the fourth quarter. Arrive with three years of profit-and-loss statements. Skip the verbal advice and get a written analysis of the five-year impact.

Does the S-Corp election affect my state taxes?

Yes, and the impact varies by state. Some states impose an additional franchise tax on S-Corps. Your state’s tax authority publishes the current rate and minimum fee on its official website. You must file a state-level S-Corp return in addition to the federal 1120-S. Your state may not conform to federal rules on distributions. To handle this, check your state’s department of revenue website for the S-Corp filing requirements. Book an appointment with a CPA who prepares returns in your specific state. Skip the generic online calculators and get a state-specific projection before you elect, and for a deeper dive into how these choices fit within the wider landscape of business entities & structures, see our guide on Business Entities & Structures: What to Know and How to Handle It.