Sole Prop, LLC, S-Corp, or C-Corp: What To Choose Before Your First Peptide Sale

You started a peptide company and now you need to determine a legal entity. That part is settled. The real question is which one, and it is not obvious. Sole prop, LLC, S-corp, C-corp, they all sound official enough, and a quick search will hand you five confident, but contradictory, answers about which to choose. So let me sort it out.

If you start selling peptides, revenue can show up fast. So the entity question is not something to sort out later. It shapes your taxes and your personal risk from day one.

Sole proprietorship is the default. You do not file anything to become one. You just start selling, and in the eyes of the law you and the business are the same thing. Sounds convenient, and it is, right up until a customer sues you, a supplier comes after an unpaid bill, or the IRS comes looking for tax you owe. There is no wall between the business and your house, your car, your savings. Regulators watch this category closely. One lawsuit or investigation aimed at the business can put everything you own on the table.

An LLC builds a protective wall. It separates you, the human, from the business, the entity. If the company gets sued or owes money, your personal stuff is generally protected, so long as you keep things clean (more on that in part two of my business basics series). Setting one up is cheap and quick.

So here is the first half of the recommendation, plain and simple. Form an LLC. A sole prop gives you no protection at all. An LLC does, for a small filing fee.

Now the second half, and this is the part worth spending some time to get it right. Forming the LLC is one decision. How that LLC gets taxed is a separate one, and you have options. By default, the IRS taxes your LLC by how many owners it has. One owner, and it is taxed like a sole proprietor, except you keep the liability shield a plain sole prop never had. Two or more owners, and it is taxed as a partnership.

Both of those defaults are pass-throughs. The business pays no income tax itself. The profit flows to the owners, who report it on their personal returns and pay tax there. That includes self-employment tax, Social Security and Medicare at roughly 15.3 percent, on top of regular income tax. On growing revenue, that runs into thousands of dollars a year. Which is exactly why the next two options exist.

Option one is to elect S-corp treatment. Still a pass-through, so no separate corporate tax. What changes is how you pay yourself. You take a reasonable salary, which carries payroll tax, and the rest comes out as a distribution, which skips the 15.3 percent self-employment tax. Past a certain profit, that saves real money. The cost is more paperwork and a set up of a real payroll solution. And the salary has to be reasonable. Set it too low and the IRS can reclassify your distributions as wages, then bill you for back payroll taxes, plus penalties and interest.

Option two is to elect C-corp treatment. The company becomes its own taxpayer and pays a flat 21 percent federal tax on its profits. If it then pays those profits out to you, you pay tax again on that money as a dividend. Two layers of tax. For most start up peptide founders, that makes a C-corp a poor fit. It earns its place when you plan to raise money from outside investors, who usually want one, or when you plan to leave profits in the company to fund growth.

Now the rule that makes all of this worth slowing down for. Once you elect to tax your LLC differently than its default, the IRS generally locks you in for 60 months. Five years. You cannot elect S-corp now, decide the payroll is a headache, and switch back next year. So run multiple scenarios before you decide. You are committing to the answer for a long while.

Here is the whole thing in one breath. Form the LLC now for the protection. Take the default pass-through taxation to start. Elect S-corp when your profit is high enough to cover the payroll and still come out ahead. Save the C-corp for when you are raising outside money.

One thing I will say plainly. This is not a form to rush, not with a five-year lock on the tax election. The peptide space has its own quirks too, from how you are positioned to how banks read you. Talk to a CPA who knows the industry, and set it up before the sales ramp. Cleaning up the wrong structure later costs far more than getting it right on day one.

Your product might be complicated. Your foundation should not be.

By Melissa Diaz, CPA, Co-Owner & Partner, High Rock Accounting