What Are Corporate Bylaws?

Bylaws defined

Bylaws are a written set of rules that a corporation adopts to govern its internal affairs. They sit underneath state corporate law and the articles of incorporation, filling in the practical details those documents leave open.

State corporation statutes — many of which are modeled on the Model Business Corporation Act (MBCA), with Delaware following its own Delaware General Corporation Law (DGCL) — set default rules for things like quorum, notice and voting. Many of those defaults can be changed, and the bylaws are the usual place to do it. When the bylaws are silent, the statutory default generally applies.

In a closely held corporation with one or a few owners, bylaws can feel like a formality. They still matter: they define who has authority to act for the company and they are part of the paper trail that shows the corporation is run as a separate entity. See our guide on corporate formalities and piercing the corporate veil for why that paper trail matters.

Bylaws vs. articles of incorporation vs. shareholder agreement

Founders often confuse three documents that do different jobs. Here is how they compare:

The articles are a public filing and tend to be short. Bylaws are longer and private. A shareholder agreement is optional and is a contract between owners rather than a governance document of the corporation itself, although its terms are often coordinated with the bylaws.

Who adopts the bylaws?

Bylaws are usually adopted right after the state accepts the articles of incorporation. Depending on the state and how the corporation was formed, they are adopted by:

• The incorporator, if no initial directors were named in the articles. The incorporator typically signs a written action appointing the first directors and may adopt bylaws at the same time.
• The initial board of directors, at the organizational meeting or by unanimous written consent.

Adoption is normally recorded in the initial organizational minutes or written consent, which is why bylaws and organizational minutes are typically prepared together.

Are bylaws filed with the state?

Generally, no. In most states bylaws are an internal document. You keep the signed bylaws and any amendments in your corporate records book, and you provide copies when someone with a legitimate need asks — a bank, an investor, a lender, an auditor or a shareholder exercising inspection rights.

Because they are not filed, nobody at the state checks whether you have them. That makes it easy to skip them — and it is a common gap that surfaces later when a bank or buyer requests a copy.

Are bylaws legally required?

Most state corporate laws contemplate that a corporation will have bylaws, and many describe how the initial bylaws are adopted. Whether a missing set of bylaws causes a specific legal consequence depends on the state, but operating without them leaves you relying entirely on statutory defaults — which may not match how you actually want the company run.

There are practical reasons, too. Banks frequently ask for bylaws (along with a banking resolution) when you open a business account, and investors and lenders typically review them during due diligence. State-specific notes are collected on our states page.

Getting a set prepared

Many founders prefer to start from customized, signature-ready bylaws rather than a blank page, then review them with an advisor.

What bylaws typically cover

Most bylaws follow a familiar structure organized into articles. A typical set includes:

For a full article-by-article walkthrough, see how to write corporate bylaws.

How to amend bylaws

Bylaws usually contain an amendment article that says who may change them — often the board, the shareholders, or both — and what vote is needed. State law and the articles of incorporation may limit the board's power to amend certain provisions.

1. Check the amendment article in your current bylaws and any limits in your articles.
2. Draft the exact amended text, including article and section numbers.
3. Approve it by board resolution and/or shareholder vote, at a meeting or by written consent where permitted.
4. Record the approval in minutes or a signed consent.
5. File the amended bylaws (or a restated version) in your records book alongside the originals.