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

The most common mistake founders make is treating an S-corp as a type of company you form with the state. It is not. In Delaware you form a corporation (a C-corp for tax purposes by default) or an LLC. The "S" refers to Subchapter S of the Internal Revenue Code, an election you make with the IRS that changes how the entity is taxed, not what kind of entity it is.

With S status, the business generally stops paying federal corporate income tax. Profits and losses pass through to the owners' personal returns, avoiding the double taxation a C-corp faces. That is the appeal. The election also comes with strict eligibility rules that rule out most startups planning to raise venture capital.

First create the underlying entity. For a corporation, file a Certificate of Incorporation with the Delaware Division of Corporations; the filing fee starts at $109 under the fee schedule revised August 1, 2026, and rises with the number of authorized shares. For an LLC, file a Certificate of Formation ($110).

Every Delaware entity must appoint and keep a Delaware registered agent with a physical address in the state; commercial agents charge an annual fee. Once the entity exists, apply for a federal Employer Identification Number (EIN) from the IRS. You need it before you can file Form 2553.

If you will operate outside Delaware, you also register as a foreign entity in your home state. That state may tax S-corps at the entity level (California, for example, charges S-corps 1.5% of net income with an $800 minimum), so check its rules before you elect.

To qualify, the entity must pass every one of these tests:

• it is a domestic corporation, or an LLC eligible to be taxed as one;
• it has no more than 100 shareholders;
• every shareholder is an allowable shareholder: US citizen or resident individuals, estates and certain trusts and exempt organizations, but not partnerships, corporations or nonresident aliens;
• it has only one class of stock (differences in voting rights alone are allowed).

The one-class rule is the deal-breaker for fundraising. Venture investors buy preferred stock, which is a second class, and venture funds are partnerships that cannot hold S-corp stock. A single nonresident alien co-founder also disqualifies the company. If you intend to raise a priced round, the S election is off the table and a Delaware C-corp is the right structure.

Make the election on IRS Form 2553, with a consent signed by every shareholder. To be treated as an S-corp for the current tax year, file no more than two months and 15 days after the beginning of that tax year. For a new entity, the tax year begins on the earliest of the date it has shareholders, acquires assets or begins doing business. You can also file at any time during the year before the year the election should take effect.

Miss the window and the election generally starts the following year. The IRS offers simplified late-election relief under Rev. Proc. 2013-30 if you file within three years and 75 days of the intended effective date and have reasonable cause; write "FILED PURSUANT TO REV. PROC. 2013-30" at the top of the form.

If the entity is an LLC, a timely Form 2553 also counts as its election to be taxed as a corporation, so you do not need a separate Form 8832.

After the election, the entity files Form 1120-S each year (due March 15 for a calendar-year company) and gives each owner a Schedule K-1.

Delaware's annual obligations do not change. A corporation files its annual franchise tax report by March 1 and pays a $50 report fee plus franchise tax: at least $175 under the Authorized Shares Method or $400 under the Assumed Par Value Capital Method. A company with few authorized shares often pays the $175 minimum; one with millions of authorized shares should use the Assumed Par Value Capital Method. A Delaware LLC instead pays a flat $400 annual tax by June 1.

Owners who work in the business must pay themselves reasonable compensation through payroll before taking distributions. The IRS scrutinizes S-corps that pay little or no salary.

For a small, closely held business, a Delaware corporation with few authorized shares is often cheaper to keep than a Delaware LLC, while an LLC is simpler to run. Both can elect S status on Form 2553, and the federal tax result is the same.

The Delaware cost difference comes from the franchise tax rules. A corporation with 5,000 or fewer authorized shares pays the $175 Authorized Shares minimum plus the $50 annual report fee, or $225 a year. A Delaware LLC pays a flat $400 annual tax by June 1, whatever its income. A corporation that authorizes millions of shares should use the Assumed Par Value Capital Method instead, where the minimum is $400.

The LLC's advantages are operational. An LLC can be governed by a short operating agreement without a board, annual meetings or stock certificates, and if the S election is later terminated or never made, it falls back to partnership or disregarded-entity treatment rather than C-corp treatment. A corporation gives you a ready path to a C-corp if you later raise venture money: you revoke the S election and the same entity becomes a C-corp, though stock issued while it was an S-corp never becomes QSBS.

The S election saves payroll tax only on profit above a reasonable salary, so the saving depends on how much the business earns and what the owner's work is worth on the market. The figures below are a hypothetical, using 2026 rates.

A single US owner runs a Delaware LLC that nets $200,000 before owner pay.

• As a single-member LLC (no election), self-employment tax applies to 92.35% of net earnings, or $184,700. Social Security at 12.4% applies up to the $184,500 wage base ($22,878) and Medicare at 2.9% applies to all $184,700 ($5,356), about $28,234 in total.
• With an S election and a $100,000 salary, employer and employee payroll tax is 15.3% of $100,000, or $15,300. The remaining $100,000 is distributed without payroll tax.

The simplified saving is about $12,900 a year. From that, subtract payroll service fees, state unemployment tax, a separate Form 1120-S and the higher bookkeeping standard an S-corp needs. In our experience the election starts to pay for itself once profit is comfortably above a market salary for the owner's role. If the business nets $90,000 and the owner's reasonable salary is $80,000, the election rarely makes sense.

For a bootstrapped, profitable company owned by a few US individuals who take money out of the business, the S election can cut payroll tax on profit above a reasonable salary. For a technology startup that plans to raise outside capital, grant options broadly or qualify for the Qualified Small Business Stock exclusion, the answer is almost always no.

QSBS under IRC §1202 applies only to stock issued by a C-corporation, and shares issued while a company is an S-corp never become QSBS, even after a later conversion. For stock issued after July 4, 2025, QSBS can exclude 50% to 100% of the gain (after three to five years), up to the greater of $15 million or 10 times basis per issuer. That is usually worth far more than the payroll tax an S-corp saves.

We help founders run this decision before they form anything, because changing structure later costs more than getting it right the first time. This is general information, not tax advice for your specific facts.