S corporation or C corporation? Rethinking the choice as you grow

Many owners chose their tax structure when the business was small, often on the advice that an S corporation is the natural choice for a profitable company. That can be the right answer for years. But as a business grows, with more profit, more reinvestment, new partners, outside investors or a possible sale, the reasoning behind the original choice can change. It’s worth revisiting.

This is general information, not advice for your particular situation. The right answer depends on your numbers, your plans and your state.

How each one is taxed

The core difference is where the income tax is paid.

An S corporation is a pass-through entity. The company generally doesn’t pay federal income tax on its profits. Instead, its income, deductions and credits flow through to the owners, who report their share on their personal returns. Owners pay tax on their share of the profit whether or not the company actually distributes cash to them. A company that keeps its profits to fund growth can leave its owners with a tax bill and no cash to pay it.

A C corporation is taxed at the entity level. The company pays income tax on its own profits. When it later pays those profits out as dividends, shareholders pay tax on the dividends too. That second layer is what people mean by “double taxation.” Profits that stay in the company aren’t taxed to the shareholders until they’re distributed or the shares are sold.

Neither is automatically better. Which one costs less depends largely on what the business does with its profits.

Paying owners and funding growth

In an S corporation, owners who work in the business are employees. They must take reasonable compensation as wages, meaning pay that reflects what the business would pay someone else to do the same work, before taking the rest of the profit out as distributions. Wages are subject to payroll taxes; distributions generally aren’t. That difference is a big part of why S corporations became popular, and it’s also why tax authorities look closely at owner pay that seems low for the role.

In a C corporation, owner-employees are also paid wages, which the company deducts. Profit beyond that stays in the company or comes out as dividends, which the company can’t deduct. Setting owner pay becomes a different balancing exercise: compensation that’s reasonable for the work, with the rest of the decision driven by how much the business needs to keep.

Reinvestment is where the choice most often shifts for growing companies.

If the business distributes most of its profit to the owners each year, a pass-through structure often fits well, because the owners are paying tax on income they actually receive.

If the business is reinvesting heavily, whether that’s hiring ahead of revenue, buying equipment, building inventory or expanding into new markets, the picture changes. A C corporation can retain its earnings, pay tax at the corporate level, and use what’s left to fund growth, without the owners paying personal tax on profit they never received. Whether that comes out ahead depends on the rates that apply to you, how long earnings stay in the business, and how they eventually come out. That’s the part that has to be modeled, not assumed.

Who can be an S corporation

S corporation status comes with eligibility limits that tend to matter more as a company grows:

• There is a cap on the number of shareholders.
• Shareholders are generally limited to individuals, certain trusts and estates. Most entities, including other corporations and partnerships, can’t hold shares.
• Nonresident alien shareholders aren’t permitted.
• The company can have only one class of stock. Shares can differ in voting rights, but their economic rights to distributions and liquidation proceeds must be the same.

These rules become practical problems when a company wants to bring in a fund, issue preferred stock or offer equity to a foreign partner. Breaking an eligibility rule can end the S election, sometimes before anyone notices.

Selling, state taxes and switching

If a sale is on the horizon, entity type shapes how a deal gets done.

Buyers often prefer to buy a company’s assets rather than its stock, partly because an asset purchase can give them better tax treatment on what they acquire. Sellers often prefer to sell stock. How that negotiation plays out, and what it means for the owners after tax, differs between S and C corporations.

C corporations may also be able to use the qualified small business stock rules, which can exclude some or all of the gain on a sale of qualifying shares from federal income tax. The requirements are detailed, covering how the stock was issued, the kind of business, the company’s size and how long the shares were held. Many of them turn on facts at the time the stock is issued, so they can’t be arranged at the time of sale. If an exit is part of the plan, this belongs in the conversation early.

State treatment varies. Not every state follows the federal pass-through treatment in the same way, some impose their own entity-level taxes or fees, and some offer their own elections. The combined federal and state picture can look quite different from the federal one alone.

Switching isn’t free or instant. Converting from an S corporation to a C corporation, or the other way, has tax consequences that should be worked through before the change, including how existing earnings, built-in gains and losses are treated. Elections have timing rules, and once S status is revoked or lost there can be restrictions on electing it again. A change made in a hurry, or partway through a year without planning, can cost more than it saves.

Model it on your own numbers

The S-or-C question doesn’t have a general answer. It depends on how much the business earns, how much it keeps, how the owners are paid, where everyone lives, who might invest, and how and when the owners expect to exit. The structure that fit when you started may not fit now, and the one that fits now may not fit in a few years.

The practical step is to model both structures on your actual numbers with an advisor who can factor in state taxes, owner compensation and your likely exit, and to revisit the analysis whenever the business changes meaningfully. Goldman Tax and Advisory helps owner-led businesses work through this choice as they grow.