Your LLC Isn't a Tax Classification (And Why That Trips Up So Many Business Owners)
If I had a dollar for every time a business owner told me "I'm an LLC" when I asked how they're taxed, I could probably take the whole month off.
It's an easy mix-up, and an honest one. You form an LLC, the state sends you paperwork, and it feels like that paperwork answered all of your questions. It didn't. Here's the piece that gets left out: an LLC is a legal structure created under state law. It has nothing to do with how the IRS taxes your business. Those are two completely separate systems, and knowing the difference can save you money, confusion, and a few surprises come filing season.
So what does determine how you're taxed?
The IRS looks at two things: how many owners your business has, and whether you've made an election to be taxed differently than the default. That's it. Your state formation documents don't come into play.
Here's how it breaks down in practice.
If you're a single-member LLC, the IRS treats you as a disregarded entity by default. In plain terms, that means your business income and expenses land on a Schedule C attached to your personal Form 1040, the same place they'd land if you'd never formed an LLC at all and were operating as a sole proprietor. The LLC gave you liability protection. It didn't change your tax picture.
If you're a multi-member LLC, the default classification is a partnership. Your business files its own return, Form 1065, and each owner receives a Schedule K-1 showing their share of the profit or loss to report on their personal return.
If you've filed Form 2553 to elect S-corp status, either as an LLC or a corporation, your business now files Form 1120-S, and owners take a reasonable salary through payroll in addition to any profit distributions. This election is often where the self-employment tax savings people talk about actually come from, but it also comes with real payroll responsibilities that shouldn't be taken on lightly.
If you're a C-corporation, your business files Form 1120 and pays tax at the entity level. Owners are taxed again on anything paid out as dividends. It's a different picture from everything above it, and usually not where a small service-based business lands by accident.
Why this matters more than it seems
When you don't know your actual tax classification, a few things tend to happen. You might be paying self-employment tax on income that could be handled more efficiently. You might be missing a filing deadline for a return you didn't realize your business needed to submit. Or you might be making decisions based on what you think your entity is, instead of what it actually is on paper with the IRS.
The good news is you don't have to guess. The clearest way to find out is to look at the tax return that was actually filed for your business last year. That form, not your formation paperwork, tells you exactly how the IRS currently classifies you.
A simple way to keep this straight
I put together a one-page quick reference guide that lays out the most common entity types side by side: how each one is formed, its default tax classification, which forms get filed, how self-employment tax applies, and what's worth knowing about each one. It's meant to be the kind of thing you can pull up in thirty seconds when this question comes up, whether that's for your own business or a conversation with a partner or co-owner.
If you're not sure where your business falls, or you suspect you might benefit from a different election than the one you're currently under, that's exactly the kind of question I work through with clients on an ongoing basis. It's rarely a one-time answer. As your business grows, the right classification can change too.