According to Bankrate’s 2025 Side Hustle Survey, more than one in four U.S. adults have a side hustle. That’s tens of millions of people selling on Etsy, freelancing on Upwork, consulting after hours, or building something on weekends that didn’t exist a year ago.
Most of them are operating as sole proprietors, whether they realize it or not. If you’re earning money from a side hustle and haven’t filed any paperwork with your state, you’re a sole proprietor by default. That means no legal separation between you and your business. Your personal assets are fully exposed.
For a lot of side hustles, that’s fine. You’re testing an idea, making a few hundred dollars a month, and the risk is minimal. But there’s a point where a “casual side gig” becomes a real business, and if you don’t make the transition intentionally, you’re exposed in ways you might not expect.
Here are five signs that it’s time to form an LLC.
1. You’re Signing Contracts or Working with Clients Directly
The moment you sign a contract with a client, a vendor, or a partner, you’re taking on legal obligations. If you’re doing that as a sole proprietor, you’re personally on the hook for every term in that agreement.
A freelance web developer who misses a deadline and faces a breach claim. A consultant whose client alleges bad advice caused a financial loss. A photographer whose equipment damages a venue. Without an LLC, the liability flows directly to you, your bank account, your car, your home.
An LLC doesn’t make you immune to lawsuits, but it creates a legal barrier between your business obligations and your personal assets. If your side hustle involves contracts, clients, or deliverables, that barrier matters.
Source: Counterpart 2024 Small Business Trends Report via BusinessWire
2. You’re Earning Enough to Think About Taxes
If you’re making more than $400 a year from your side hustle, the IRS requires you to pay self-employment taxes on that income. Most side hustlers clear that threshold quickly.
As a sole proprietor, all of your net income is subject to self-employment tax on top of your regular income tax. Every dollar of profit gets taxed.
An LLC doesn’t automatically change your tax treatment. By default, a single-member LLC is taxed the same way as a sole proprietorship. But forming an LLC opens the door to tax elections that a sole proprietor can’t access. Once your profits consistently exceed $40,000–50,000 annually, you can elect S corp tax treatment, pay yourself a reasonable salary, and take the remaining profits as distributions that aren’t subject to self-employment tax. The savings can be significant, but you need the LLC in place first.
For a detailed comparison of how different structures affect your taxes: Compare Business Formation Structures on the BizUpUSA blog.
3. You’re Using Your Personal Bank Account for Business
This is the one most side hustlers get wrong the longest. You deposit client payments into your personal checking account, pay for business expenses with your personal card, and figure you’ll sort it all out at tax time.
There are two problems with this. First, it makes your taxes a nightmare. Trying to separate business and personal transactions after the fact is time-consuming and error-prone, and your accountant will charge you more for the extra work.
Second, commingling finances is exactly what courts look for when deciding whether your LLC’s liability protection is real. Even after you form an LLC, running business income through your personal account weakens the legal separation between you and your company. A court can “pierce the corporate veil” and hold you personally liable.
The fix is straightforward: form your LLC, get an EIN from the IRS, and open a dedicated business bank account. Keep every business transaction in that account. BizUpUSA includes EIN filing with our Growth and Complete plans.
4. You’re Selling a Product or Service That Carries Risk
Some side hustles carry more liability than others. Selling handmade candles is different from selling homemade food. Tutoring math is different from giving fitness coaching. Building websites is different from giving financial advice.
If your side hustle involves physical products that could injure someone, professional advice that someone could act on, services performed at a client’s home or property, or anything that requires a license or certification, the liability exposure is real. One incident as a sole proprietor could wipe out your personal savings.
An LLC won’t replace business insurance, and for higher-risk activities you should have both. But the LLC is the foundation. Insurance covers specific claims; the LLC protects everything else.
5. You’re Starting to Think of It as a Business
This one’s less about a specific threshold and more about intent. Are you investing in equipment? Building a website? Turning away your full-time job’s overtime to work on your side project instead? Planning to leave your day job eventually?
According to Bankrate , 21% of Gen Z side hustlers want to turn their side gig into their full-time job. If that’s you, or if you’re even starting to think that way, forming an LLC now is cheaper and easier than doing it later after you already have clients, contracts, and revenue to untangle.
Source: U.S. Census Bureau Business Formation Statistics
Forming an LLC also changes how other people see you. Banks require it to open a business account. Clients take you more seriously when they’re signing a contract with an LLC rather than an individual. Vendors offer better terms to registered businesses. It’s a credibility signal that costs a few hundred dollars and takes less than an hour to set up.
When You Don’t Need an LLC Yet
Not every side hustle needs an LLC right away. If you’re still in the idea-testing phase - making a few hundred dollars a month, no contracts, low risk, no plans to scale - a sole proprietorship is fine for now. The cost of forming an LLC is modest, but so are the costs of waiting a few months while you figure out whether this thing has legs.
The key is to make that a conscious decision, not a default. Know what you’re giving up (liability protection, tax flexibility, credibility) and decide it’s worth it for the simplicity. Then revisit the decision as your revenue and risk profile change.
Quick Win: The Side Hustle Decision Framework
Not sure where you stand? Here’s a simple way to evaluate your situation:
If you checked “Form an LLC” for two or more rows, it’s time. BizUpUSA’s Starter plan is $0 plus state fees, and you can go from decision to filed in under 15 minutes. See plans and pricing.
What’s Next
Moving from a side hustle to LLC isn’t complicated. The cost is modest and the filing process is relatively fast. And the protection, tax flexibility, and credibility you gain are worth far more than the filing fee.
The mistake most people make isn’t forming too early, it’s waiting until something goes wrong and realizing they should have done it months ago.
For more on the specific mistakes to avoid once you’ve formed your LLC, check out last week’s edition: The 5 LLC Mistakes That Cost First-Time Founders Real Money.
Have you made the leap from side hustle to LLC? What pushed you to make it official? Tell us in the comments.
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See you next week.
— The BizUpUSA Team
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