How to Incorporate a Startup (and Pick a Structure)

Incorporation is the least exciting decision a founder makes and one of the easiest to get expensively wrong. Pick the wrong structure and you may have to unwind it before you can raise. File in the wrong place and investors quietly route around you. Skip the founder paperwork and you discover, years later, that nobody actually assigned the company its own intellectual property.

The good news is that the right answer for most venture-track startups is well-worn and boring. The skill is knowing when to do it, which structure fits your actual ambition, and which documents matter on day one versus which can wait.

This guide covers when to incorporate, how to choose between an LLC and a C-corporation, why investors push for a Delaware C-corp, and the founder paperwork that prevents the worst early disputes.

When to actually incorporate

Founders ask "should I incorporate yet?" far too early. While you are alone, exploring an idea with no co-founder, no customers, and no investment, a legal entity mostly adds cost and filing obligations for no benefit. The moment to act is when you have something real to protect or to share.

Two triggers are unambiguous. The first is taking on a co-founder: the instant equity is being divided, you need an entity that can issue shares and a paper trail that makes the split real and vested. The second is outside money: no investor can buy equity in something that does not legally exist. A third softer trigger is your first paying customers or any meaningful liability, where the personal-liability shield of a company starts to matter.

LLC vs C-corporation: follow your ambition

The structure question sounds technical but reduces to one thing: are you building a venture-scale company that will raise money and grant equity to a team, or a smaller business you will own and run?

If your plan involves raising venture capital, building a cap table, and handing out equity and stock options, a C-corporation is almost certainly correct — it is the only structure that does all of that cleanly. If you are building a profitable, founder-owned business with no outside investors, an LLC is simpler, cheaper, and more tax-efficient. The mistake is choosing the LLC for its simplicity and then trying to raise venture money, which usually forces a costly conversion later.

Why investors want a Delaware C-corp

In the US, the default is not just a C-corp but specifically a Delaware C-corp, and the reason is friction. Delaware has a century of well-tested corporate law, a specialized court for business disputes, and standardized documents that every startup lawyer and investor already understands. That predictability makes financings fast and cheap.

Because of that, most venture investors expect a Delaware C-corp, and some simply will not invest in anything else. Incorporating there from the start spares you a conversion under deal pressure later. None of this means Delaware is right for a non-US or non-venture business — but if your map points at US venture capital, this is the well-paved road.

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The founder paperwork that actually matters

Filing the incorporation is the easy part; the documents around it are where founders get hurt. A handful matter enormously and are cheap to get right at the start.

1. Founder stock with vesting

   Issue founder shares subject to vesting from day one. Unvested founder equity is the main protection against a co-founder leaving early with a huge stake — the full case for which is in our guide to startup vesting and cliffs.

2. IP assignment

   Every founder must assign the intellectual property they created for the company to the company. Without this, the startup may not legally own its own product — a deal-killer in diligence.

3. File your 83(b) election on time

   If you take stock subject to vesting, the 83(b) election (filed within 30 days in the US) can save you a large, avoidable tax bill later. The deadline is hard and missing it is irreversible.

4. Board consent and EIN

   Adopt the founding board actions and get a tax ID so the company can open a bank account, sign contracts, and pay people as itself.

Don't over-lawyer the early stage

Incorporation tempts founders into two opposite mistakes. One is doing nothing until a crisis forces it; the other is spending thousands on bespoke legal work before there is a business. Both waste resources you do not have.

For most early startups, standard incorporation documents — the kind accelerators and startup-focused lawyers provide as templates — are exactly right. They are battle-tested, investors recognize them, and they cost a fraction of custom work. Save the expensive, customized legal advice for when you have real, unusual complexity. Until then, boring and standard is a feature, because it is how the equity you carefully split between co-founders actually becomes real, enforceable ownership.

The incorporation checklist

• Wait for a trigger: a co-founder, an investor, or real liability — not before.
• Match structure to ambition: C-corp for the venture path, LLC for bootstrapped.
• Default to Delaware if you're chasing US venture capital.
• Nail vesting, IP assignment, and the 83(b) at the start — they're cheap now and ruinous to fix later.
• Use standard templates; save custom legal spend for genuine complexity.

Incorporation will never be the part of the company you are proud of, but it is the foundation everything else is built on — the cap table, the fundraising, the equity you give your team. Get the structure and the founder paperwork right early, and you never have to think about it again. When you are ready to bring on the co-founder these documents are written for, the Foundersbase network is built for the search.