Sole Proprietor vs LLC: Which Structure Protects Your Business

Most people treat this decision like it’s about prestige. Like forming an LLC is somehow graduating from “just” being a sole proprietor. I want to push back on that pretty hard, because I’ve watched clients spend $400 to $800 setting up an LLC they didn’t need, then pay ongoing state fees every year, when a sole proprietorship would’ve served them just as well for the first few years of their business.

That said, I’ve also seen the other mistake: a contractor with $180,000 a year in revenue operating as a sole proprietor, one lawsuit away from their personal savings getting wiped out. Both errors are real. And the annoying truth is, the right answer depends almost entirely on your specific situation.

So let me tell you what I’ve actually seen across 18 years of this work, and what the numbers say.

The Real Difference (And It’s Not the One People Focus On)

Everyone leads with liability protection when they explain LLCs. And yes, that matters. But I’ll be honest: what surprises most of my clients when we actually sit down together is how much the tax conversation ends up driving the decision at higher income levels.

Start with the basics. A sole proprietorship is automatic. You start selling services or products, and legally, you’re already one. No paperwork, no filing, no fee. The business and the person are the same entity, which means you report everything on Schedule C of your personal tax return. Simple. Clean. Free.

An LLC (Limited Liability Company) is a separate legal entity you create by filing Articles of Organization with your state. As of July 2026, filing fees range from $50 in Kentucky to $500 in Massachusetts, with most states landing somewhere between $50 and $200. Some states also charge annual fees or franchise taxes, California, infamously, charges an $800 annual minimum franchise tax no matter what your LLC earns.

What surprised me early in my career was how similar the tax treatment actually is by default. Unless you elect otherwise, a single-member LLC is taxed exactly like a sole proprietorship: everything flows to your Schedule C. Same forms, same self-employment tax rate (15.3% on your net earnings up to the Social Security wage base, currently $168,600 for 2026, then 2.9% above that). The protection is real. The default tax difference is not.

Liability: What “Protection” Actually Means in Practice

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Here’s where I want to be precise, because this gets oversimplified constantly.

An LLC creates a legal wall between the business and your personal assets. If someone sues your LLC, they generally can’t come after your house or personal savings. That “generally” is doing a lot of work in that sentence. Courts will “pierce the corporate veil” – go right through your LLC to your personal assets, if you commingle funds, fail to maintain a separate business bank account, or don’t operate the LLC as a distinct entity. I’ve seen this happen. It’s not theoretical.

A worked example: A freelance web developer, $65K/year in revenue, sole proprietor. A client claimed his work caused a security breach and sued for $210,000. No LLC, no separation, no protection. His personal checking account was fair game. He settled for $47,000 out of pocket. That same scenario with a properly maintained LLC, separate account, annual report filed on time, and his personal assets are off the table.

Conversely: A part-time Etsy seller making $18,000 a year selling hand-poured candles? The liability risk is low, the income doesn’t justify the overhead, and a solid general liability insurance policy (usually $400 to $600 a year from carriers like Hiscox or Next Insurance) plugs most of the practical exposure gap without the administrative burden of an LLC.

The U.S. Small Business Administration actually covers this tradeoff directly in their business structure guides, they’re more honest about the nuance than most “form an LLC!” content you’ll find online.

The Tax Angle People Miss Until It’s Too Late

I’ll be honest: I got this wrong myself early on. For years I defaulted to telling clients that the tax treatment was essentially the same between a sole proprietor and a single-member LLC, so the decision was “just” about liability. That’s true at lower income levels. It stops being true somewhere around $60,000 to $80,000 in net profit, and here’s why.

An LLC can elect to be taxed as an S-corporation. Under that election, you pay yourself a “reasonable salary” – say, $45,000, and take the rest as a distribution. You only pay self-employment tax on the salary portion, not the distribution. At $100,000 in net profit, that could mean saving somewhere in the range of $5,000 to $8,000 per year in SE tax, depending on your situation. The catch: you now need payroll, a separate payroll tax filing, potentially a bookkeeper, and a CPA who knows S-corp returns. That extra complexity costs real money, often $1,500 to $3,000 a year in accounting fees. So the math only tips positive once the savings exceed the cost of maintaining it.

This isn’t advice I can be more specific about without knowing your actual numbers. Please talk to a CPA before making this move. But it’s the conversation that most articles skip entirely, and it’s often the reason a business owner at $90,000 net profit should be reconsidering their structure.

A Side-by-Side Look at the Real Numbers

Here’s how the two structures compare on the dimensions that actually matter day-to-day, as of July 2026:

Note: California’s $70 formation fee is separate from the $800 annual franchise tax. A lot of people get tripped up by that.

How to Actually Decide

Here’s the framework I use with clients. It’s not complicated, but it requires honesty about where you actually are.

If you’re in the early stages, under $40,000 in annual revenue, low liability exposure (coaching, writing, certain consulting work), and you’re not sure the business will stick, start as a sole proprietor. Keep clean records. Open a separate bank account anyway (seriously, just do this from day one). Get liability insurance if clients or products create any risk. Revisit the structure once you hit $40,000 to $60,000 in net profit or once you take on a client contract that requires an LLC.

If you have real liability exposure, you work in people’s homes, handle client data, produce physical products, give advice that could cause financial harm, form the LLC. The annual fee and the paperwork are worth it. The Consumer Financial Protection Bureau’s small business resources have decent plain-language guides on this if you want to read the legal reasoning in non-lawyer terms.

A second worked example: A personal trainer in Denver, $52,000 gross, working out of clients’ homes. Formed an LLC in Colorado ($50 filing fee), opened a dedicated business checking account at a local credit union, and got a $1M general liability policy for $38 per month through Hiscox. Total annual overhead for the structure: around $506. Piece of mind that a client injury claim won’t touch his apartment and car: genuinely worth it.

The third scenario I see constantly, and it almost always ends with someone paying back taxes and penalties, is a freelancer who earns $110,000 in net profit as a sole proprietor and never talks to a CPA about the S-corp election. I don’t have hard aggregate data on how widespread this is, so I can’t give you a number. But I’ve seen it enough times that I’d strongly encourage anyone at that income level to at least have the conversation. The accounting costs to explore it are minor.

Sources

• U.S. Small Business Administration (SBA): Official guide to business structures, including sole proprietorships and LLCs
• IRS Publication 334 (Tax Guide for Small Business): Covers Schedule C, self-employment tax, and sole proprietor tax treatment
• IRS Single Member LLC guidance: Official treatment of single-member LLCs for federal tax purposes
• State Secretary of State websites: Filing fees and annual requirements vary; always check your specific state directly
• Consumer Financial Protection Bureau (CFPB): Small business financial resources and plain-language legal guides

Photo: Tima Miroshnichenko via Pexels

This article is for general informational purposes only and does not constitute financial, tax, or legal advice. Business finance and tax rules vary by entity type, state, and individual circumstances. Consult a qualified CPA, enrolled agent, or business attorney for advice specific to your situation.

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