Single-Member LLC Taxes: What Solo Owners Need to Know

The single-member LLC is the default starting point for millions of American solo businesses — and one of the most misunderstood. Owners often assume forming an LLC changes how they are taxed. In most cases it does not. Here is what actually happens on your return, and where the real decisions lie.

This is general information, not individual tax advice — the right treatment depends on your specific situation.

By Default, the IRS Ignores Your LLC

Unless you elect otherwise, the IRS treats a single-member LLC as a disregarded entity. That means the LLC is invisible for federal income tax purposes, and its activity is reported on the owner's own return — generally on Schedule C of Form 1040 for an operating business (Schedule E or F applies to rentals or farming). You are taxed exactly as a sole proprietor would be. There is no separate business income tax return, and the business's profit simply flows onto your personal return.

Self-Employment Tax Is the Real Cost

Because a disregarded-entity owner is not an employee of the LLC, there is no paycheck and no payroll withholding. Instead, you owe self-employment tax on the net profit of the business — the Social Security and Medicare contributions that an employer and employee would otherwise split, totaling 15.3% up to the annual Social Security wage base and 2.9% (plus any additional Medicare tax) above it. This is on top of regular income tax, and it is the figure that surprises most first-year owners. Quarterly estimated payments are usually required to cover both.

When You Need an EIN — and When Your SSN Is Fine

A single-member LLC that is a disregarded entity, has no employees, and owes no excise tax does not technically need its own Employer Identification Number; it can use the owner's Social Security number for income tax reporting. You will need an EIN once you hire employees, become liable for certain federal excise taxes, or set up particular retirement plans — and separately, most banks require one to open a business account. Because of that, getting an EIN is common even when the IRS does not strictly require it. An EIN is free and takes minutes to obtain directly from the IRS.

The S-Corp (or C-Corp) Election

An LLC is not locked into disregarded-entity treatment. You can ask the IRS to tax your LLC as a corporation. Filing Form 8832 elects C-corporation treatment; filing Form 2553 elects S-corporation treatment (which also handles the underlying classification). The S-corp election is the one solo owners reach for most often.

Why Owners Elect S-Corp Status

The appeal is self-employment tax. An S-corp owner who works in the business must be paid reasonable compensation as a W-2 salary, which is subject to payroll taxes — but profit distributed above that salary generally is not subject to self-employment tax. For a consistently profitable business, that split can produce real savings. The trade-offs are real too: you must run payroll, file a separate Form 1120-S return, and defend that your salary is genuinely reasonable. The election makes sense at a certain profit level, not from day one.

Liability vs. Taxation: Two Different Things

One point owners routinely conflate: an LLC is a state-law liability shield, not a federal tax category. Forming an LLC can help separate your personal assets from business creditors, but by itself it does not change your federal tax treatment at all. The entity gives you legal protection; the tax election — disregarded, S-corp, or C-corp — is a separate decision layered on top of it.

How VarStan Helps

The single-member LLC question is really two questions — how you are taxed today, and whether an election would save you money as you grow. As a CPA-led firm, we model the self-employment tax math, tell you whether and when an S-corp election is worth the added payroll and filing burden, handle the EIN and the elections, and keep the compensation defensible. If you are running a solo business and wondering whether you are leaving money on the table, that is exactly the kind of question worth a quick conversation.