Delaware C-corp founder setup guide for 2026

Every Delaware C-corp founder has four main paths in 2026: Stripe Atlas ($500), Clerky ($427), Gust Launch ($450), or DIY with state fees only. The real decisions aren't the service pick. They're filing your 83(b) election inside the 30-day window, setting a vesting schedule, and keeping a clean cap table from day one.

Most startup incorporation content reads like a Stripe Atlas affiliate post. Every Delaware C-corp founder deserves the real picture: four services plus DIY, their actual prices and turnaround, and the three things you will regret in year two if you skip them on day one.

This guide assumes you are a first-time founder, you have co-founders or plan to hire, and you expect to raise venture capital. If any of those is false, a Delaware C corporation startup may not be the right vehicle. Talk to a lawyer before filing.

How to incorporate Delaware as a C-corp founder

Run these eight steps in order. Most startup incorporation mistakes come from skipping or reordering them.

1. Pick your formation path. Stripe Atlas, Clerky, Gust Launch, or DIY with a Delaware registered agent and a startup lawyer.
2. File the Certificate of Incorporation. Submitted to the Delaware Division of Corporations with your share structure , typically 10,000,000 authorized common shares.
3. Get your EIN from the IRS. Free; takes minutes online for US-resident founders, longer via fax for non-US founders.
4. Draft bylaws and appoint initial directors. Bundled by Atlas and Clerky; DIY requires lawyer-drafted templates.
5. Issue founder stock with a stock purchase agreement. Every founder buys their shares at par value and signs restricted-stock paperwork subject to vesting.
6. File your 83(b) election within 30 days of the stock transfer. Mail to the correct IRS service center with certified tracking. Details in the section below.
7. Open a business bank account. Mercury and Brex are the standard picks for US startups.
8. Set up your cap table in Carta or Pulley. A single source of truth from day one prevents the uninvestable-cap-table problem during fundraising (Carta).

Stripe Atlas vs Clerky vs Gust vs DIY: the 2026 price and speed table

Pick the service that matches your workflow, not the one with the best landing page.

When DIY wins: you already have a startup-focused attorney quoting flat-fee formation under $1,500, or a relationship with a firm that will absorb incorporation into a founder-friendly engagement. Otherwise, bundled services save you hours you should spend on customers.

When Atlas wins: you want the fastest path to a VC-ready entity and a business bank account on the same day, with Cooley-drafted templates out of the box (Stripe Atlas).

When Clerky wins: you want lawyer-grade defaults and a platform that nags you about the 83(b) deadline instead of you learning about it from Twitter three months late (Clerky).

83(b) election timing is the regret you cannot undo

The 83(b) election is the single highest-leverage piece of paperwork in the first 30 days of a Delaware C corporation startup.

If you are issued restricted stock subject to vesting (and you should be; see the next section), the default tax treatment is that you owe ordinary income tax on the fair market value of each tranche as it vests. With an 83(b), you pre-pay that tax at grant date, when the shares are worth almost nothing. Miss the filing and the bill compounds across all four years of vesting.

The mechanics that kill founders:

• 30-day clock. File within 30 days of the stock transfer date. Per IRS Form 15620, revocation is not permitted without IRS consent.
• Paper filing required. Mail the signed election to the IRS service center where you file your personal return. Certified mail with return receipt is standard. Keep the green card forever.
• Keep three copies. One for your personal records, one for the company's corporate file, one attached to your next personal tax return.

Clerky pre-fills the form and emails you reminders (Clerky). Atlas includes 83(b) support in onboarding. DIY founders should put the filing date in three separate places; missed 83(b)s are functionally unfixable and sit in the top three most common irreversible founder mistakes.

Vesting and cap table hygiene on day one

If you issue founder stock without a vesting schedule and your co-founder leaves in month eight, you just handed equity to someone no longer building the company , and you cannot claw it back without a buyback clause you never signed.

• Set a 4-year vesting schedule with a one-year cliff. This is the default Fenwick recommends and the default every VC will ask you to sign at the seed round. Doing it on day one means no awkward renegotiation when you raise.
• Keep a single cap table source of truth. Carta or Pulley from day one. Not a Google Sheet, not your lawyer's Word doc, not your memory. A clean cap table is a funding prerequisite (Carta); an inconsistent one kills deals at diligence.
• Do not over-issue founder shares to yourself. The standard structure authorizes 10,000,000 common shares and issues roughly 8,000,000 across founders, leaving headroom for an option pool (typically 10–15%) and future employees.
• Document everything in the corporate minute book. Board consents, stock issuances, option grants. If a future investor asks for the minute book during diligence and you hand them a folder of loose PDFs, expect questions.

FAQ

How much does it cost to form a Delaware C corporation in 2026? Between $427 (Clerky) and $500 (Stripe Atlas) for bundled services, with Gust Launch at $450. DIY costs are limited to Delaware state filing fees plus a registered-agent subscription, but you are on your own for stock docs and the 83(b). The bundled option is almost always cheaper once you count your time.

What is the deadline for filing an 83(b) election? Thirty days from the stock transfer date. Per IRS Form 15620, the election must be filed by mail to the IRS and cannot be revoked without IRS consent. Miss the window and you cannot retroactively claim it, ever.

Should I use Stripe Atlas or Clerky to incorporate my startup? Atlas if you want fast, Cooley-templated docs and a bundled bank-account experience. Clerky if you want lawyer-grade defaults, pre-filled 83(b) paperwork, and filing reminders. Both produce VC-ready Delaware C-corps; the choice is workflow preference, not legal quality.

What are the top mistakes founders make on day one of incorporation? Skipping the 83(b) filing, issuing founder stock without a vesting schedule, and failing to track the cap table in a single source of truth. Each one gets harder and more expensive to fix every quarter. The first two are functionally unfixable once missed.

How long does it take to form a Delaware corporation with Atlas vs Clerky? Stripe Atlas advertises next-day expedited Delaware processing per Stripe Atlas, making it the fastest bundled path. Clerky and Gust Launch turnaround depends on whether you add Delaware expedited filing to the base package. DIY without expedite is the slowest option.