Most business owners pick an entity because someone told them to form an LLC. That is not the same as choosing the right structure.
The entity you form on day one affects your taxes, your liability exposure, your ability to raise capital, and what happens to the business when you are ready to exit. It is worth getting right.
Book free consultationChoosing the wrong business entity costs more in taxes and legal exposure than most business owners realize until they are already past the point where it is easy to fix. An LLC, S-Corp, and C-Corp are not interchangeable. Each has different tax treatment, ownership rules, liability protections, and implications for how the business gets sold or passed on. Getting the structure right at the beginning is significantly cheaper than restructuring it later.
The most common thing we hear from business owners who come to us after the fact is some version of: my accountant said to form an LLC, so I did. Sometimes that was the right call. Sometimes it was not, and by the time we are having the conversation, unwinding it is more complicated than starting fresh would have been.
Entity selection is a decision with tax consequences, liability consequences, and long-term structural consequences that interact with each other in ways that are not obvious at the outset. A single-member LLC taxed as a sole proprietorship, an LLC taxed as an S-Corp, and a C-Corp set up to issue QSBS are three fundamentally different structures with different implications for your income, your estate plan, and your eventual exit. The filing fee is the same. The outcomes are not.
Entity selection
The first question is which entity fits your situation, which requires understanding what you are building, how you plan to profit from it, who else will be involved, and what you want to happen to it eventually.
LLC. The Arizona limited liability company is the most flexible business structure available. It separates your personal assets from business liabilities, can be owned by one person or many, and can be taxed as a sole proprietorship, a partnership, or a corporation depending on elections made at formation or afterward. The operating agreement governs everything the statute does not: profit distributions, management authority, ownership transfers, and what happens when an owner wants out.
S-Corp Election. An LLC or corporation that elects S-Corp status for tax purposes is treated as a pass-through entity, with income and losses flowing to the owners' personal returns. The primary advantage over a standard LLC taxed as a sole proprietorship is the ability to pay owner-employees a reasonable salary and take additional profits as distributions, reducing self-employment tax on the distribution portion. The savings can be significant at higher income levels. S-Corps come with restrictions (no more than 100 shareholders, one class of stock, and shareholders must be U.S. citizens or residents) that matter for businesses planning to grow or bring in outside investors.
C-Corp for QSBS Planning. A C-Corp is the only structure that can issue Qualified Small Business Stock under IRC Section 1202. For founders and early investors in qualifying companies, QSBS allows up to $15 million in capital gains to be excluded from federal tax on a sale, provided the holding period and other requirements are met. The One Big Beautiful Bill Act increased the exclusion to $15 million and shortened the required holding period to three years, effective 2026. If there is any possibility the business will be sold to outside buyers or raise institutional capital, C-Corp formation with QSBS planning built in from the start is worth serious consideration.
Partnership. For businesses with multiple owners who want flexibility in how profits and losses are allocated (beyond the equal-per-share treatment of an S-Corp) a partnership structure allows custom arrangements documented in a partnership agreement. This is common in professional service firms, real estate ventures, and family businesses where different owners contribute different things and expect different returns.
Operating agreements and partnership agreements
Forming the entity is the beginning, not the end. The document that actually governs how the business runs is the operating agreement for an LLC or the partnership agreement for a partnership. Most online formation services generate a generic one-page agreement that covers almost nothing. Most businesses that run into internal disputes discover this at the worst possible time.
A well-drafted operating agreement covers how decisions get made and by whom, how profits and losses are allocated and when distributions happen, what happens when an owner wants to sell their interest, what happens when an owner dies or becomes incapacitated, how new members can be admitted, and what it takes to dissolve the business. These are not hypothetical questions. They are questions every multi-member business eventually has to answer, and the time to answer them is before there is a disagreement.
Existing businesses that never got it right
A significant portion of the formation work we do is for businesses that have been operating for years under a structure that was never quite right, or that was right at formation but has not kept up with how the business has grown.
Common situations we see: an LLC that should have made an S-Corp election years ago and has been overpaying self-employment taxes as a result. A multi-member business running on a handshake with no operating agreement. A business owner who formed a C-Corp for the liability protection but did not realize QSBS required the shares to be issued at the right time, to the right people, under the right conditions. A family business where ownership transferred informally without documentation, creating title problems that complicate a future sale.
These situations are fixable. They are just easier to fix before a transaction, a dispute, or an audit makes them urgent.
How formation connects to your estate plan
The way your business is owned and structured directly affects how it fits into your estate plan. A business interest held in your own name passes through your estate at death and may trigger probate. The same interest held by your revocable living trust transfers to your beneficiaries privately and immediately. How the operating agreement handles a deceased member's interest determines whether your family inherits a functioning ownership stake or a claim that other members can block.
We draft business formation documents with the estate plan in view, which means the operating agreement and the trust work together rather than against each other.
A complete formation engagement includes
Frequently asked questions
What is the best business entity for a small business in Arizona?
It depends on your situation. An LLC is the most flexible starting point and works well for most small businesses. Whether to elect S-Corp tax treatment depends on your income level and whether the self-employment tax savings justify the added administrative requirements. A C-Corp makes sense if you are building a business you plan to sell to outside buyers or raise capital from investors, particularly if QSBS planning is on the table. Entity selection is one of the first conversations we have with every new business client.
What is an S-Corp election and should I make one?
An S-Corp election changes how your LLC or corporation is taxed. Instead of paying self-employment tax on all net business income, you pay yourself a reasonable salary subject to payroll taxes and take additional profits as distributions, which are not subject to self-employment tax. The savings can be several thousand dollars per year at higher income levels. The election has eligibility requirements and adds payroll administration. Whether it makes sense depends on your net income and overall tax picture.
What is QSBS and how does C-Corp formation affect it?
Qualified Small Business Stock under IRC Section 1202 allows shareholders to exclude up to $15 million in capital gains from federal tax on a qualifying sale. The stock must be issued by a C-Corp with gross assets under $75 million at the time of issuance, held for at least three years, and acquired at original issuance. The One Big Beautiful Bill Act updated these thresholds effective 2026. QSBS eligibility depends on decisions made at formation and at the time shares are issued. It cannot be recreated retroactively.
What should an operating agreement include?
A complete operating agreement addresses management structure and decision-making authority, profit and loss allocation, distribution timing and amounts, restrictions on transferring membership interests, buyout rights and procedures when a member wants to leave, what happens at a member's death or incapacity, admission of new members, and dissolution procedures. Generic operating agreements from online formation services typically address only a fraction of these issues.
Can I convert my existing LLC to an S-Corp or C-Corp?
Yes, with varying degrees of complexity depending on your current structure and what you are converting to. An S-Corp election can typically be made on an existing LLC without restructuring the entity itself. Converting to a C-Corp involves a more significant structural change with tax consequences that need to be analyzed carefully. We assess the current structure, model the tax implications, and recommend the most efficient path.
What happens to my business when I die if I do not have an operating agreement?
Arizona's LLC statutes provide default rules that govern in the absence of an operating agreement, but those defaults may not reflect what you would have chosen. In a multi-member LLC, a deceased member's interest typically passes to their estate or heirs, who may have the right to receive economic distributions but not to participate in management. Whether surviving members can buy out the interest, and at what price, depends on documents that may not exist. An operating agreement answers these questions in advance.
Get the structure right at the start.
Book a free 30-minute consultation. We will walk through what you are building, the tax tradeoffs, and the entity that fits your goals.
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