How to Set Up Your Business Legally: Entity Types, Registration, and Compliance

Now that you've locked in your pricing strategy, there's a natural next question every solo developer asks: "What legal structure do I actually need?" The answer might disappoint you — especially if you're excited to 'make it official' — because the honest answer is: probably nothing, not yet.

This section covers the legal and structural decisions you'll face as your side business grows from idea to paying customers. But here's the frame: just as you wouldn't overcomplicate your product before you had customers, you shouldn't overcomplicate your legal structure before you have meaningful revenue or meaningful risk. The irony of indie developer forums is that you'll see developers spending weeks researching Delaware vs. Wyoming LLCs for a product with zero customers — the same over-engineering impulse that leads to six months of tech stack debates before a single feature ships.

I'm not a lawyer, this isn't legal advice, and your specific situation may have wrinkles that a real attorney should look at. That said, the legal setup for a solo developer side business is genuinely not that complicated. What follows is what you actually need, roughly in the order you actually need it.

Sole Proprietorship: The Invisible Default

Here's what happens if you don't do anything: you're already operating as a sole proprietor. You're self-employed, filing business income on Schedule C of your personal tax return, and keeping all the profits (minus taxes). It's the path of least resistance.

The upside is real: zero setup friction, zero ongoing paperwork, zero ongoing costs. You can start taking customers today and be completely legal.

The downside is real but often overstated for early-stage side hustles: you have no liability separation. If your business gets sued, the plaintiff can come after your personal assets — your savings, your car, theoretically your house. That's a genuine concern, not a theoretical one.

How much should this scare you? Depends on what you're building. If you're selling PDF guides about productivity or a $15/month productivity tool, your practical liability exposure is pretty low. The kind of lawsuit that would pierce through to your personal assets typically involves something going seriously wrong — data breaches, financial harm to users, contractual disputes with real money on the line. Most small SaaS tools and digital products don't present enough liability risk to justify moving away from sole proprietor status on day one.

Sole proprietorship is fine for: validating an idea, making your first few hundred dollars, freelancing for clients you trust on small projects.

It starts to feel uncomfortable when: you're handling sensitive user data, charging meaningful amounts of money, signing contracts that have indemnification clauses, or building something in a regulated industry.

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LLC vs. S Corp vs. C Corp: The Actual Decision

Ignore C corps for now (we'll get to Delaware in a moment). The real question for most solo developer side hustles is: LLC or S corp election on top of an LLC?

The LLC

A Limited Liability Company is the workhorse structure for small businesses. It gives you the liability protection that a sole proprietorship lacks — your personal assets are separated from business liabilities, with some important exceptions — while being remarkably simple to run. A single-member LLC (just you) is taxed as a "disregarded entity" by default, meaning for federal income tax purposes, it's still a Schedule C on your personal return. Same tax treatment, better legal protection.

For a side hustle generating under $100k a year, an LLC in your home state is almost always the right call. You don't need the complexity of a corporation. You don't need a board of directors. You don't need to issue stock. You need a piece of paper that says your business and your personal finances are legally distinct, and an LLC does that cleanly.

The S Corp Election

An S corp isn't a separate entity type — it's a tax election you can make on top of an LLC (or a C corp). The reason people get excited about S corps is self-employment tax. When you're a sole proprietor or single-member LLC, you pay self-employment tax (roughly 15.3% on the first $176,100 of net income for 2025^[1] (this amount adjusts annually), depending on current IRS schedules) on all your business profit. With an S corp election, you split your income into a "reasonable salary" and distributions — and you only pay payroll taxes on the salary portion, not the distributions.

The math can work out nicely once you're profitable enough. But here's the thing: the compliance overhead of an S corp is real. You need to run payroll (including for yourself), file additional tax forms, potentially pay an accountant to handle the additional complexity, and maintain more rigorous documentation. Most practitioners in the small business space suggest the S corp election starts making sense somewhere around $50-80k in net profit per year^[2] — below that, the compliance costs eat the tax savings. Below $100k in revenue (which means lower net profit), you're probably better served by a plain LLC and revisiting the S corp question later when the numbers are larger.

A quick comparison:

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The Delaware C Corp Argument (And When to Ignore It)

You've probably heard that "serious" startups incorporate in Delaware. There's some truth to this — Delaware has well-developed corporate law, predictable courts for business disputes, and venture capitalists are often contractually required to invest only in Delaware C corps. Services like Stripe Atlas^[3] have built businesses around this: [over 100,000 founders have used Atlas to incorporate in Delaware^[3]](https://stripe.com/atlas), get an EIN, issue founder equity, and file an 83(b) election, with documents created in collaboration with Cooley LLP^[3].

That's a real product solving a real problem — for a specific kind of startup. If you're building something you plan to raise venture capital for, where you'll have co-founders you need to issue equity to, where you'll need to run a proper cap table — yes, Delaware C corp via Stripe Atlas or a similar service makes sense. The Stripe Atlas incorporation process^[3] handles the mechanics of incorporation, EIN, equity issuance, and the 83(b) election (a tax election that matters enormously if your equity will appreciate).

If you're building a solo side hustle, the Delaware C corp is overkill verging on self-harm. You'll pay Delaware franchise taxes ($300 per year for LLCs)^[4], or $175-$400+ per year for corporations depending on the calculation method, file in Delaware, and register as a foreign corporation in your home state if you do business there (paying fees in two states), maintain a Delaware registered agent, and deal with a corporate structure that exists mainly to serve investors you don't have. Linear and Cursor — both mentioned as Stripe Atlas success stories — are VC-backed companies with multiple founders and the complexity that entails. They are not the model for a one-person side business generating $40k a year from a Notion template subscription.

Warning: The Delaware C corp is the right tool for a startup seeking venture funding with multiple co-founders — not for a solo developer side business. Defaulting to Delaware because "that's what real companies do" will cost you money and compliance hours for no benefit.

The rule of thumb:

• Planning to raise VC money? Delaware C corp.
• Solo or small team, bootstrapped, no immediate fundraising plans? LLC in your home state.

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How to Actually Register an LLC

Once you've decided to form an LLC, the process is more anticlimactic than the legal-services industry would have you believe.

State filing is where it starts. Every state has a Secretary of State office (sometimes called the Department of Corporations or similar) that accepts LLC formation filings. You submit Articles of Organization (sometimes called a Certificate of Formation) with basic information: your business name, your registered agent's name and address, your own contact information. Filing fees vary by state — some states charge as little as $50, others over $500.

You can do this yourself directly on your state's government website. You don't need a formation service for this step, though services like Northwest Registered Agent, Incfile, or similar will do it for you for a fee (plus their own margin on top of the state fee). If you value your time or find bureaucratic websites frustrating, there's nothing wrong with using one of these services. Just be clear that you're paying for convenience, not expertise.

Your Operating Agreement is a document you should create even though most states don't legally require it for single-member LLCs. It establishes that you're the sole member, how the company is managed, and some basic rules of operation. This matters because banks will often ask for it when opening a business account, and it reinforces the legal separation between you and your business. Single-member LLC operating agreement templates are freely available and sufficient for most cases.

Beneficial Ownership Information (BOI) reporting is a newer requirement that many small business owners don't know about. As of 2024, most LLCs and corporations are required to file BOI reports with the Financial Crimes Enforcement Network (FinCEN), a bureau of the U.S. Treasury. The requirement comes from the Corporate Transparency Act. The BOI reporting requirement for existing companies had a January 1, 2025 deadline that was extended to March 21, 2025, and subsequently revised on March 26, 2025, when all domestic U.S. companies were exempted from BOI reporting requirements^[5].; new companies formed after January 1, 2024 generally must file within 90 days of formation. The filing itself is free and done through FinCEN's online portal — but non-compliance has real penalties. This is one area where "I didn't know I had to do this" is not a defense.

Warning: BOI reporting is easy to miss because it's relatively new and not part of the traditional "how to start an LLC" checklist. Make sure to file with FinCEN after formation.

Local requirements vary. Some cities and counties require a local business license even for home-based online businesses. This is often a simple registration and annual fee. Check your city or county government's website.

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Getting Your EIN: Free, Easy, Five Minutes

An Employer Identification Number (EIN) is essentially a Social Security Number for your business. You need one to:

• Open a business bank account (most banks require it)
• File business taxes separately from personal taxes
• Hire employees (if you ever do)
• Apply for certain business licenses
• Set up payment processing as a business entity

Get your EIN directly from the IRS for free at irs.gov. The online EIN application is available during business hours and takes about five minutes. Your EIN is issued immediately at the end of the process — you can download the confirmation letter right then.

That's it. That's the whole section on EIN acquisition.

What I don't want you to do: pay a formation service, LegalZoom, or any third party to "get your EIN" for an additional fee. These services are charging you $50-100 to fill out the exact same IRS form you would fill out yourself. The IRS doesn't give special access to these services. They're not faster. They're not more accurate. They're just more expensive.

Tip: Screenshot or download your EIN confirmation letter immediately. The IRS will mail you a paper copy eventually, but the digital copy you get right after filing is your fastest path to opening a business bank account.

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Registered Agents: What They Are and What to Pay

A registered agent is a person or company designated to receive official legal and government documents on behalf of your business — things like service of process (being served a lawsuit), state tax notices, and annual report reminders. Most states require LLCs to have a registered agent with a physical address in the state (not a P.O. box).

You can serve as your own registered agent if you have a physical address in the state. The downside: your address becomes part of the public record, and you need to be physically available during business hours to accept service of process. For a home-based business, many people prefer not to have their home address in state corporation databases.

Professional registered agent services charge typically $50-150 per year. Northwest Registered Agent, Registered Agents Inc., and similar services are legitimate options at the lower end. If you use a formation service to set up your LLC, they'll often try to bundle registered agent service — sometimes free for the first year, then rolling into an annual fee. Just know what you're signing up for.

This is not worth overthinking. Pick any legitimate registered agent service at a reasonable price. It's commodity infrastructure.

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Trademark Basics: When It's Worth the Trouble

A trademark protects your brand identifiers — your business name, logo, tagline — from being used by others in the same market. It's different from copyright (which protects creative works automatically) and patents (which protect inventions).

Here's the practical reality for most solo developer side businesses: trademark registration is not day-one work. It matters when:

1. You've validated that your product has real traction and you're building a brand worth protecting
2. You're considering operating in multiple states or internationally
3. Your business name is distinctive and someone else using it would genuinely damage you

Federal trademark registration through the USPTO costs $350 per class of goods or services as of 2025^[6]. The process takes 8-14 months and involves an examiner review. You can file directly through the USPTO's TEAS (Trademark Electronic Application System) without a lawyer for straightforward cases, though a trademark attorney review is worthwhile if your mark is in a crowded space or the classification isn't obvious.

A trademark does not protect your code, your business process, or your ideas — that's not what the system is for. And registering an LLC with a particular name in your state doesn't give you trademark rights; those are separate things.

For most early-stage side hustles: do a basic trademark search (the USPTO's TESS database is free) before settling on a name, but don't file for registration until you have meaningful traction.

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The Day Job Consideration: Read Your Employment Contract Now

This is the most underrated legal check in this entire section. Before you write a single line of code for your side project, pull out your employment contract and read the intellectual property assignment and conflict-of-interest sections.

Many standard employment agreements contain IP assignment clauses that are much broader than you'd expect. Some claim ownership of any work you create while employed — not just work done on company time or with company resources, but any work created during your period of employment that is "related to" the company's current or anticipated business. Depending on how "related to" is defined and what industry your employer is in, this could theoretically encompass your side project.

A few specifics to look for:

• IP assignment scope: Does it cover only work done on company time or equipment, or everything you create while employed? Some states (California, Delaware, Illinois, Minnesota, North Carolina, and Washington among them) have statutory limits on employer IP assignment clauses that protect employee side projects.^[7]
• Conflict of interest provisions: Some contracts prohibit working for or building businesses that compete with your employer, even on your own time.
• Non-compete clauses: Depending on your state, these may or may not be enforceable, but you should know they exist.

The practical advice: read the contract, and if anything looks potentially problematic, spend an hour with an employment attorney to get their read. That's one of the situations where hiring a professional is worth it — before you've invested months into a project, not after.

Warning: If your employment contract has a broad IP assignment clause, you may want to get written clarification from your employer before starting a side project, not after. "I didn't know" doesn't unwind an IP dispute.

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When to Hire a Lawyer vs. When to DIY

The honest answer is: most of the basic stuff covered in this section you can handle yourself. State LLC registration, EIN application, basic operating agreements, BOI filing — these are all designed to be self-service, and the instructions are clear enough for a developer to follow.

Hire a lawyer when:

• Your employment contract has language you can't parse or that seems potentially problematic
• You're entering a significant contract (with a client, vendor, or partner) that has meaningful money or liability attached
• You want to bring on a co-founder and need a proper founders' agreement
• You're in a regulated industry (healthcare, fintech, edtech in certain contexts) where compliance requirements are specific and consequential
• You've received a legal notice or threat

Avoid using a lawyer for things that are genuinely commodity: getting an EIN, filing your Articles of Organization for a simple LLC, creating a basic operating agreement from a reputable template.

The middle ground — services like Clerky, Stripe Atlas for the Delaware C corp case, or formation services for LLC setup — can be worth it if you want someone else to handle the mechanics. Just know what you're paying for: convenience and template documents, not legal advice.

One resource worth knowing: many state bar associations have lawyer referral services that can connect you with attorneys who offer free or reduced-cost initial consultations. For a quick read of an employment contract's IP clause, that's often all you need.

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Putting It in Order: The Actual Sequence

If you're at the point where you want to properly set up your business, here's the sequence that makes practical sense:

1. Check your employment contract for IP assignment and conflict-of-interest clauses before anything else
2. Validate your business idea and make some money — even a small amount — so you know this is worth setting up
3. Decide on your state and entity type (almost certainly LLC in your home state, unless you have specific reasons otherwise)
4. File your Articles of Organization with your state Secretary of State
5. Designate a registered agent
6. Create a basic operating agreement (free templates work fine for single-member LLCs)
7. Get your EIN from the IRS directly
8. File your BOI report with FinCEN
9. Open a business bank account (use your EIN and operating agreement)
10. Check local license requirements for your city or county
11. Do a trademark search on your business name; file later once you have traction

The whole process — excluding time spent reading your employment contract — should take a few hours, not weeks.

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If you take one thing from this section: Get your employment contract's IP assignment clause reviewed before you build anything, form an LLC when you have real revenue or real liability exposure, and get your EIN free from the IRS directly — the legal setup for a solo side business is a few hours of work, not a project.

Recap — three things to remember

1. LLC in your home state is the right default for most solo side hustles; Delaware C corp is for VC-backed startups
2. Get your EIN free from irs.gov — never pay a third party to do this for you
3. Read your employment contract's IP assignment clause before you start building anything

Sources cited

1. roughly 15.3% on the first $176,100 of net income for 2025 thf.cpa ↩
2. Most practitioners in the small business space suggest the S corp election starts making sense somewhere around $50-80k in net profit per year harness.co ↩
3. Stripe Atlas stripe.com ↩
4. You'll pay Delaware franchise taxes ($300 per year for LLCs) corp.delaware.gov ↩
5. all domestic U.S. companies were exempted from BOI reporting requirements fincen.gov ↩
6. Federal trademark registration through the USPTO costs $350 per class of goods or services as of 2025 uspto.gov ↩
7. Some states (California, Delaware, Illinois, Minnesota, North Carolina, and Washington among them) have statutory limits on employer IP assignment clauses that protect employee side projects. fisherphillips.com ↩