How to Start an S-Corp in Delaware: A Step-by-Step Guide for 2026

Step 1: Understand What an S-Corp Actually Is

The single most common mistake founders make is treating an S-corp as a type of company you create at the state level. It is not. In Delaware you can only form a corporation (a C-corp by default) or an LLC. The 'S' refers to Subchapter S of the federal tax code — an election you make with the IRS that changes how the entity is taxed, not what kind of entity it is.

When you elect S-corp status, the business stops paying corporate income tax. Instead, profits and losses pass through to the owners' personal tax returns, avoiding the double taxation a C-corp faces. That is the appeal. But the election comes with strict eligibility rules that disqualify most startups planning to raise venture capital.

Step 2: Form the Delaware Entity

First create the underlying entity. For a corporation, you file a Certificate of Incorporation with the Delaware Division of Corporations (the standard filing fee starts around $89 for the minimum stock authorization). For an LLC, you file a Certificate of Formation (a $110 state fee).

Every Delaware entity must also appoint and maintain a Delaware registered agent with a physical in-state address. Registered agent services typically run $50 to $300 per year. Once the entity exists, apply for a federal Employer Identification Number (EIN) from the IRS — you need it before you can make any tax election.

Step 3: Confirm You Meet the S-Corp Eligibility Rules

To qualify for S-corp status, the entity must satisfy every one of these tests: it must be a domestic entity; have no more than 100 shareholders; have only allowable shareholders (individuals who are U.S. citizens or residents, plus certain trusts and estates — but not partnerships, corporations, or non-resident aliens); and have only one class of stock.

That one-class-of-stock requirement is the dealbreaker for fundraising. Venture investors buy preferred stock, which is a second class. Funds and other entities also cannot be S-corp shareholders. So if you intend to raise a priced round, the S-corp election is off the table and a Delaware C-corp is the right structure.

Step 4: File Form 2553 with the IRS

Make the election by filing IRS Form 2553, signed by all shareholders. Timing is critical: to be treated as an S-corp for the current tax year, you must file no later than two months and 15 days after the beginning of that tax year (for a new entity, two months and 15 days after the formation date). Miss that window and the election generally applies to the following year, though the IRS allows late-election relief in limited circumstances.

If your entity is an LLC, electing S-corp status also requires the LLC to be treated as a corporation for tax purposes — Form 2553 handles this automatically, so you do not need to file a separate Form 8832.

Step 5: Stay Compliant Year to Year

After the election, the entity files Form 1120-S each year and issues a Schedule K-1 to each owner. Delaware still charges annual franchise tax — a corporation pays a minimum of $175 (Assumed Par Value method often lower than the Authorized Shares method for startups) plus a $50 annual report fee, while an LLC pays a flat $300 annual tax. S-corp owners who work in the business must also pay themselves 'reasonable compensation' through payroll, which the IRS scrutinizes closely.

Should Your Startup Be an S-Corp at All?

For a bootstrapped, profitable company with a small number of U.S. founders who take money out of the business, the S-corp election can save real self-employment tax. For a technology startup that plans to raise outside capital, issue stock options, or eventually qualify for the Qualified Small Business Stock (QSBS) gain exclusion, the answer is almost always no — those benefits require a C-corp. We help founders run this decision before they form anything, because changing structure later is more expensive than getting it right the first time.