Limited liability companies (LLCs) and S corporations (S corps) are two of the most common business structures in the US, but they're frequently confused. The most important distinction to understand is that an LLC is a legal business entity, whereas an S corp is an Internal Revenue Service (IRS) tax classification. Because they operate on completely different levels, they're not mutually exclusive: a business formed as an LLC can elect to be taxed as an S corp. Choosing the right structure impacts everything from personal liability and self-employment taxes to ongoing administrative overhead.

Below, we'll explain the key differences between LLCs and S corps, as well as how to decide which structure is right for your business.

Key takeaways

• An LLC is a legal entity formed under state law to protect personal assets. An S corp is a federal tax status created by the IRS.

• Because an S corp is a tax status rather than an entity type, an eligible LLC can file IRS Form 2553 to be taxed as an S corp while retaining its simplified LLC legal structure.

• Under standard LLC status, all net profits are subject to self-employment tax. S corp election allows owner-employees to split profits into reasonable salaries and owner distributions.

• Standard LLCs require minimal corporate governance. Electing S corp status introduces stricter compliance requirements, including running formal payroll, withholding taxes, filing annual Form 1120-S returns, and tracking officer compensation.

• LLCs offer unlimited operational flexibility with no restriction on owner types or counts. S corps enforce strict IRS boundaries: no more than 100 shareholders, US citizens or permanent residents only, and a single class of stock.

What is an LLC?

A limited liability company is a type of business entity that combines the limited liability protection of a corporation with the flexibility and Tax benefits of a partnership. Forming an LLC establishes a business as a separate Legal entity from its Owners, who are called members. That means they’re not personally responsible for the business’s debts and obligations.

LLC members pay self-employment taxes on their earnings. Alternatively, an LLC can elect to be taxed as a corporation, which might offer different Tax advantages depending on the business structure.

What is an S corp?

An S corporation is a business structure that’s typically more appropriate for small and medium-sized businesses that want to avoid the double Taxation that can occur with a traditional corporation.

In an S corp, the Company’s Income, deductions, and credits pass through to the shareholders’ personal Tax returns and the Company itself doesn’t pay federal Income Tax. This means that the S corp’s profits are taxed only once: the shareholders pay Tax on their distributions at their personal Income Tax rates.

To be eligible for S corp Status, a business must meet specific IRS requirements such as:

• Having no more than 100 shareholders

• Being organized as a domestic corporation

• Allowing only US citizens or permanent residents as shareholders

• Issuing one Class of stock (i.e., no preferred stock)

• Meeting all S corp election filing requirements with the IRS

S corps are a popular choice for businesses that want the liability protection of a corporation but prefer to be taxed like a partnership or sole proprietorship. However, S corps require more administrative work, such as filing annual reports and meeting payroll Tax obligations for owner-employees.

What are the differences and similarities between an S corp and an LLC?

Similarities between an S corp and an LLC

While an LLC is a legal business entity and an S corp is an IRS tax status, they share several foundational benefits for business owners:

• Limited liability protection: Both shield personal assets (e.g., your home, personal bank accounts, and investments) from business debts, judgments, and legal liabilities.

• Pass-through taxation: Neither structure is subject to double taxation by default. Instead, business profits and losses pass through directly to the owners' personal tax returns.

• Separate legal identity: Both establish a distinct business identity separate from the owners, enhancing operational credibility with clients, vendors, and lenders compared to a sole proprietorship.

• State compliance duties: Both require ongoing state-level maintenance, such as appointing a registered agent, filing annual reports, and paying applicable state fees or franchise taxes.

Differences between an S corp and an LLC

The choice of whether to organise as an S corp or an LLC depends on the specific needs and goals of the business owners. While both S corps and LLCs provide limited liability protection to their owners, their tax treatment, ownership structures, and management requirements differ significantly.

Here are the key differences between these two options.

Taxation

By default, LLCs are pass-through entities, which means profits and losses pass through to owners' personal tax returns. However, LLCs can elect to be taxed as a corporation (C corp or S corp), if desired. S corps are always pass-through entities so they avoid double taxation at the corporate level. S corps can also provide tax savings on self-employment taxes by allowing owner-employees to take part of their incomes as distributions, which aren't subject to payroll taxes.

While an S corp election can lower federal self-employment taxes by splitting earnings into salaries and tax-exempt distributions, state-level tax rules add important nuances for both structures. Standard LLCs often face mandatory annual state franchise fees, whereas S corps might face state-level income taxes, local nonrecognition rules, or tax deductions for specialised pass-through entities.

Ownership

S corps restrict shareholders to US citizens or permanent residents, and there can be no more than 100 total shareholders. LLCs don't have these restrictions. Additionally, S corps can issue only one class of stock, while LLCs can have multiple classes of ownership interests.

Management

LLCs offer more flexibility regarding management structure since they can be managed either by the owners (member managed) or by a designated manager (manager managed). S corps are required to have a board of directors, designate officers, and hold regular board and shareholder meetings.

Formalities

S corps generally have more formalities and reporting requirements compared to LLCs (e.g., holding regular meetings, maintaining corporate records). However, some states require LLCs to submit annual reports and pay fees.

Cost

While a standard LLC is relatively inexpensive to form and simple to maintain, electing S corp status introduces significant ongoing administrative costs. The cost to establish an LLC ranges from US$35–US$500 depending on the state, although annual operating expenses are low.

But maintaining S corp status requires running formal W-2 payroll, paying for payroll processing software, submitting quarterly payroll tax filings, and paying a certified public accountant to handle a separate corporate tax return (Form 1120-S). This can add roughly US$1,500–US$4,000 per year in operational costs.

Can an LLC be an S corp?

Yes, an LLC can elect to be taxed as an S corp. This allows the business to benefit from the pass-through taxation that S corps enjoy while maintaining the flexibility and limited liability protection of an LLC. To qualify for S corp taxation, the LLC must meet certain requirements, including having no more than 100 shareholders (all of whom are US citizens or permanent residents), having only one class of stock, and meeting certain restrictions on the types of shareholders and types of stock that can be issued.

While an LLC can elect to be taxed as an S corp, it's still classified as an LLC under state law and must comply with all the requirements and regulations that govern LLCs in the state where it's registered. Companies that opt for S corp taxation might also have to follow additional regulations and requirements, such as:

• Filing annual reports with state and federal agencies

• Maintaining accurate business records

• Following payroll tax rules for owner-employees

• Adhering to shareholder and stock class restrictions

It can get complicated, which is why it's important to work with a tax attorney and accountant to ensure your business complies with IRS regulations and state requirements.

Can an S corp own an LLC?

Yes, an S corp can own shares in other corporations or own interests in other types of businesses, including LLCs. If an S corp owns an LLC, the LLC is considered a separate Legal entity and the S corp’s ownership interest in the LLC is treated as a business asset. The S corp will report its ownership interest in the LLC on its tax return, and any Income or losses generated by the LLC will flow through to the S corp and be reported on the S corp's tax return.

In this Scenario, the S corp would be considered the parent Company or holding Company of the LLC and the LLC would be a subsidiary or wholly owned subsidiary of the S corp. The S corp would have the power to make decisions and take actions on the LLC’s behalf, as well as responsibility for any liabilities or debts incurred by the LLC. This structure can provide Tax benefits and liability protection while keeping the business entities legally distinct.

When do LLCs vs. S corps make the most sense?

Both LLCs and S corps offer advantages and drawbacks, depending on a business’s specific needs. Consider the following as you choose between them for your business:

• Flexibility: LLCs offer more control over ownership, management structure and Tax Status. They can be owned by one or more people, managed by the Owners or by a designated manager, and taxed either as a pass-through entity or as a corporation.

• Reporting requirements: LLCs generally have fewer formalities and reporting requirements than S corps, which can make them easier—and less expensive—to manage.

• Self-employment taxes: LLC Owners must pay self-employment taxes on all profits, which can be higher than the taxes paid by S corp shareholders. S corp Owners can avoid some self-employment taxes by paying themselves a salary and accessing additional profits as distributions, which aren’t subject to self-employment taxes.

• Business lifespan: In some states, LLCs have a limited lifespan and might need to be dissolved after a certain period of time or after a specific event, such as an Owner’s death.

• Access to capital: Compared to S corps, LLCs might have limited options for raising capital (e.g., stock offerings, taking on investors). S corps have restrictions on who can be a shareholder and how many they can have. That can make this structure attractive to smaller businesses that want to limit the number of Owners.

How to choose between an LLC and an S corp

It’s important to do your research and due diligence before you commit to a business structure. Consider the options for ownership structure, management, Taxation, and liability protection. Think holistically about your business and long-term business objectives. Which aspects of each structure feel the most important to you, as an Owner?

Here are some simple steps to help you decide between an LLC and an S corp:

• Evaluate your business needs: Consider the type of business you run, the number of Owners or shareholders you have, the industry you operate in, and your long-term goals for the business.

• Understand the tax implications: Compare the Tax advantages and disadvantages of each structure. These include pass-through Taxation for LLCs and S corps, self-employment taxes for LLCs, and the potential for Tax savings with S corps. There are benefits and drawbacks with either option so the specifics of your business will dictate which is right for you.

• Consider liability protection: Both LLCs and S corps offer limited liability protection for Owners, but LLCs might provide more flexibility in terms of personal asset protection—especially if the business has multiple Owners.

• Compare management structures: Think about the level of management control and flexibility you need, including whether you want to be actively involved in running the business or prefer to hire a designated manager.

• Understand the compliance requirements: Both LLCs and S corps have specific requirements that must be met, including rules about filing paperwork, holding regular meetings, and maintaining accurate records. Consider the time and resources needed to Comply with these regulations.

• Seek professional advice: Before you make a decision, consult a qualified attorney or accountant who can help you understand the Legal and Tax implications of each structure. They can help you make an informed decision.

The table below breaks down the differences between S corps and LLCs.

When does S corp election pay off?

Standard single-member and multimember LLCs operate as default pass-through entities; the Owners pay the 15.3% self-employment Tax (12.4% Social Security and 2.9% Medicare) on 100.0% of net business profits.

Electing S corp Taxation alters this treatment: owner-employees pay themselves a “reasonable W-2 salary” (subject to 15.3% payroll taxes) and take remaining profits as Owner distributions, which are exempt from self-employment Tax.

However, an S corp election isn’t free. It introduces mandatory ongoing overhead, including payroll software fees, quarterly employment Tax filings, and separate corporate Tax return preparation (IRS Form 1120-S). Because this Compliance adds roughly US$1,500–$4,000 per year in operational costs, the election pays off only when Tax savings exceed these added expenses.

When to use both an LLC and an S corp

Using both an LLC and an S corp means establishing a legal LLC with your state and filing IRS Form 2553 to elect S corp tax classification. It doesn't involve forming two separate entities. This hybrid approach gives business owners the operational flexibility and asset protection of an LLC as well as the tax benefits of an S corp.

These are the situations when it's ideal to combine an LLC with an S corp election

• You want tax savings without the corporate governance burden: Operating as a legal C corp or S corp requires strict corporate formalities, such as creating a board of directors, holding formal shareholder meetings, and maintaining corporate minutes. Forming an LLC and electing S corp tax treatment allows you to secure the tax savings while maintaining a simplified, flexible LLC management structure.

• Your business has outgrown standard LLC tax treatment: If you launched as a standard LLC and your net profit exceeds US$50,000, filing Form 2553 allows you to fine-tune your tax structure without needing to dissolve your existing entity or transfer assets to a new corporation.

• You meet all criteria for IRS S corp eligibility: Combining an LLC with an S corp tax election is ideal if your business satisfies IRS mandates – 100 or fewer members (shareholders), membership that's restricted to US citizens or permanent residents (no corporate or foreign owners), and one class of ownership issued.

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