LLC vs S-Corp for Montana Small Business Owners
For most profitable Montana LLCs earning more than $50,000 in net profit, an S-corp election can save $3,000–$15,000 per year in self-employment tax. But the election is not automatic — and it is not always the right move. Here is how the math actually works, when it makes sense in Montana, and the mistakes that turn a great strategy into an audit risk.
The core tax difference
As a default LLC (taxed as a sole proprietor or partnership), 100% of your net profit is subject to self-employment tax — 15.3% on the first ~$168,600 and 2.9% on income above that.
As an S-corporation, you split your profit into two buckets: reasonable compensation (paid as W-2 wages, subject to payroll tax) and distributions (not subject to self-employment tax). If your reasonable compensation is set correctly, the distribution portion escapes self-employment tax entirely — that is where the savings come from.
A quick Montana example
Say your Montana LLC earns $150,000 of net profit. As a default LLC, roughly $22,000 goes to self-employment tax on top of your regular income tax.
Elect S-corp, pay yourself a reasonable $70,000 salary, and take the remaining $80,000 as distributions. Payroll tax on the salary is roughly $10,700 (employer + employee side). Self-employment tax on the distributions is zero. Total savings: about $11,000 per year, every year going forward.
When it makes sense
The rule of thumb: consistent net profit over $50,000 and a realistic reasonable-compensation figure below your total profit. Under $50,000, the payroll and compliance costs eat most of the savings. Over $50,000 the math starts to work; over $100,000 it almost always works.
You also need to be able to run payroll (or hire someone to), file a separate business return (1120-S), and maintain clean books. If any of those are a stretch, the S-corp adds friction that outweighs the savings.
When it does not make sense
Your profit is under $50,000 and inconsistent. You need to keep all profit in the business for growth and cannot pay yourself a real salary. You are a high-risk industry where liability protection needs the flexibility of a multi-member LLC. You have foreign owners, more than 100 shareholders, or an entity type S-corp rules do not allow.
The reasonable-compensation trap
The IRS knows S-corp owners try to pay themselves as little salary as possible to maximize distributions. This is one of the most-audited issues in small-business tax. Your salary needs to be defensible — based on what someone doing your actual job would be paid in your industry and geography.
In Montana, we typically use RCReports or similar industry data to document a defensible figure. Underpaying yourself as an S-corp owner is not a gray area — it is the fastest way to lose the strategy in an audit.
How to actually make the election
You elect S-corp status by filing Form 2553 with the IRS. To be effective for the current year, it generally must be filed within 2 months and 15 days of the start of the tax year (so by mid-March for calendar-year businesses). Late elections are possible using relief provisions — we do this for clients regularly.
Once elected, you must run payroll (usually at least quarterly), file Form 1120-S each year, prepare K-1s for shareholders, and maintain a separate business bank account. The strategy only works if the compliance side is done — sloppy S-corps invite exactly the audit they were trying to save money on.