LLC vs. Sole Proprietorship vs. S-Corp: Choosing the Right Business Structure for Your Online Business in 2026

You launched your Shopify store, landed your first freelance client, or published your first course — and now someone tells you to "get an LLC." But is that actually right for you, or are you paying $500 in state fees and annual reports to protect assets you don't yet have? The answer depends on three things: how much you earn, how much risk your business carries, and how much paperwork you're willing to manage.

The Four Structures, Side by Side

Most online business owners will land in one of four buckets: sole proprietorship, single-member LLC, multi-member LLC, or an LLC (or corporation) that has made an S-Corp tax election. Here is what each actually costs and does.

Sole Proprietorship

A sole proprietorship costs nothing to form — you are already one the moment you earn freelance income or sell a product. Your business income flows directly onto Schedule C of your personal 1040, and you pay self-employment (SE) tax of 15.3% on net profit up to the Social Security wage base (~$176,100 in 2026), plus 2.9% Medicare on everything above that. The catch: there is zero liability separation. A customer lawsuit or a business debt can reach your personal bank account, home, and savings.

Single-Member LLC

A single-member LLC costs roughly $50–$500 to file depending on your state (Wyoming: $100; California: $70 filing + $800 annual franchise tax). By default the IRS treats it as a "disregarded entity" — meaning taxes work exactly the same as a sole proprietorship, with full SE tax on profits. What you gain is the liability shield: your personal assets are legally separated from business debts and lawsuits, provided you keep finances separate and maintain basic formalities.

Multi-Member LLC

Add a partner or co-founder and the LLC is taxed as a partnership by default, filing Form 1065. Each member's share of profit appears on a K-1 and is subject to SE tax if they are active in the business. Formation costs are similar to a single-member LLC, but you will need an operating agreement spelling out ownership percentages and decision-making authority — skipping this is one of the most common and costly omissions among early-stage online businesses.

S-Corp Election

An S-Corp is not a separate legal structure — it is a tax election (IRS Form 2553) that an LLC or corporation files. Once elected, the business pays you a "reasonable salary," which is subject to payroll taxes (FICA). Profit above that salary flows to you as a distribution — and distributions are not subject to SE tax. That is where the savings come from. Example: if your online business nets $120,000 and you pay yourself a $60,000 reasonable salary, you pay FICA only on the $60,000, saving roughly $9,000 in SE taxes — minus $2,000–$4,000 per year in payroll processing and additional accounting costs.

When to Convert: Profit Thresholds That Actually Matter

The question is not "should I form an LLC?" in the abstract — it is "does the benefit outweigh the cost at my current profit level?"

• Under $20,000 net profit: A sole proprietorship is often fine. Focus on building revenue, not paperwork.
• $20,000–$60,000 net profit: A single-member LLC is worth it for liability protection, especially if you have clients signing contracts, hold inventory, or run paid ads that could create disputes.
• Above $60,000–$80,000 net profit: Run the numbers on an S-Corp election. The SE tax savings typically exceed the added costs of payroll and a more complex tax return at this threshold.

Multi-State Considerations for Online Sellers

Selling online does not mean you only exist in one state. Economic nexus rules (triggered by sales volume — typically $100,000 in sales or 200 transactions in a state) can require you to collect and remit sales tax in dozens of states regardless of where your LLC is formed. Forming in Delaware or Wyoming does not eliminate this obligation — and if your home state is not Delaware or Wyoming, you will likely need to register as a foreign entity there anyway, paying fees in two states instead of one. For most solo online business owners, forming your LLC in your home state is the simpler and cheaper path.

Common Mistakes to Avoid

1. Commingling personal and business funds. This is the fastest way to pierce the corporate veil and lose your liability protection. Open a dedicated business checking account the day you form your LLC.
2. Skipping the registered agent. Every LLC needs a registered agent with a physical address in the state of formation. Missing legal notices because you forgot this can have serious consequences.
3. Setting an unreasonably low salary in an S-Corp. The IRS knows this game. Paying yourself $1 and taking $200,000 in distributions is a red flag. Benchmark your salary against what you would pay someone else to do your job.
4. Forgetting annual reports. Most states require an annual or biennial report and fee to keep your LLC in good standing. Missing it can result in administrative dissolution.

A Simple Decision Framework

Protect first, optimize taxes second. Get the liability shield before you chase the SE tax savings — a lawsuit at $30,000 in revenue hurts just as much as one at $300,000.

— Practical Rule of Thumb

Ask yourself three questions: (1) Could my business expose me to meaningful legal or financial liability? If yes, form an LLC now. (2) Am I netting more than $60,000–$80,000 per year from this business? If yes, model the S-Corp savings with your accountant. (3) Do I have a business partner? If yes, get an operating agreement drafted before you touch revenue. None of these decisions are irreversible — you can convert a sole prop to an LLC in a few weeks, and you can make the S-Corp election at the right profit milestone. The goal is to use the simplest structure that fits where you are today, and upgrade it as your numbers grow.