How Contractors Can Legally Reduce Self-Employment Tax

If you're a contractor operating as a sole proprietor or single-member LLC, there's a tax you probably feel more than any other: self-employment tax. It hits every dollar of profit, and for a busy trades business it can be one of your largest bills of the year.

The good news is that self-employment tax is one of the most controllable taxes a contractor pays — legally, with the right structure and planning. This isn't about loopholes or gray areas. It's about how your business is set up and how you pay yourself.

What Self-Employment Tax Actually Is

Self-employment tax is how self-employed people fund Social Security and Medicare. When you're an employee, your employer withholds these taxes and pays half for you. When you work for yourself, you're both the employer and the employee — so you pay both halves.

The combined rate is roughly 15.3% of your net self-employment income (about 12.4% for Social Security up to an annual wage base that the IRS adjusts each year, plus 2.9% for Medicare with no cap, and an additional Medicare surtax at higher incomes). On top of that, you still owe regular income tax.

That 15.3% is the part contractors underestimate. On $200,000 of profit, self-employment tax alone can run into the tens of thousands — before you've paid a dollar of income tax.

Why Sole Props and Single-Member LLCs Pay It on Everything

Here's the trap many contractors fall into. A single-member LLC gives you legal liability protection, but for tax purposes the IRS treats it exactly like a sole proprietorship by default. An LLC is not a tax classification.

That means all of your net profit flows straight to your personal return and is subject to self-employment tax — whether you took the money out of the business or left it in to buy materials, equipment, or build a reserve. The IRS doesn't care that you reinvested it. If it's profit, it's taxed.

So a contractor netting $250,000 as a default LLC pays self-employment tax on the full $250,000. That's the baseline we're trying to improve on.

The Main Lever: The S-Corp Election

The single biggest tool for reducing self-employment tax is electing to have your business taxed as an S-Corp. You can usually keep your existing LLC and simply file an election with the IRS to change how it's taxed — the legal entity doesn't have to change.

As an S-Corp, your profit gets split into two buckets. The first is a reasonable salary you pay yourself through payroll, which is subject to payroll taxes (the S-Corp equivalent of self-employment tax). The second is distributions — the remaining profit, which is not subject to self-employment or payroll tax.

That split is the whole game. If a contractor netting $250,000 pays a reasonable salary of, say, $110,000 and takes the rest as distributions, only the salary carries payroll tax. The distribution portion escapes that roughly 15.3% hit. Depending on the numbers, that can mean five figures in annual savings.

What "Reasonable Compensation" Really Means

This is where contractors get into trouble, so read carefully. The IRS requires S-Corp owners to pay themselves a salary that is reasonable — meaning roughly what you'd have to pay someone else to do your job. You cannot pay yourself a token $30,000 and route $220,000 through distributions to dodge payroll tax.

Reasonable compensation depends on your role, your hours, your experience, what you'd pay a foreman or project manager doing similar work, and what the business can support. A working owner running a $3M trades company earns a very different defensible salary than a part-time consultant.

Underpaying your salary is one of the most common S-Corp mistakes, and the IRS actively looks for it. If they decide your salary was unreasonably low, they can reclassify distributions as wages and add back taxes, penalties, and interest — wiping out the savings you were chasing. The number has to be defensible, documented, and set with a professional.

When an S-Corp Actually Makes Sense

The S-Corp election isn't free. It brings mandatory payroll, a separate business tax return, extra bookkeeping, and generally higher compliance costs. Those costs have to be worth it.

As a rough rule of thumb, the election tends to start paying off once your business consistently nets somewhere in the range of $60,000–$80,000 or more in profit after paying yourself. Below that, the added costs can eat the savings. Well above it, the savings can be substantial. These are general guideposts, not a formula — the right threshold for you depends on your salary level, state taxes, and how steady your profit is.

Other Levers That Stack On Top

The S-Corp election is the headline, but a few other strategies work alongside it. Retirement contributions — such as a Solo 401(k) or SEP IRA — let you move profit into a tax-advantaged account, reducing income tax now while building wealth. An S-Corp structure can also change how much you're able to contribute, which is worth modeling before year-end.

An accountable plan lets your S-Corp reimburse you, tax-free, for legitimate business expenses you pay personally — home office, mileage, tools, phone. Done correctly, those reimbursements are deductible to the business and not taxable income to you. It has to be a formal plan with real documentation, not a shoebox of receipts.

Hiring family — a spouse or older child doing genuine work — can shift income and open retirement or benefit options, but this one demands caution. The work has to be real, the pay has to be reasonable for that work, and the paperwork has to hold up. Done sloppily, it's a red flag rather than a strategy.

None of This Works Without Planning and Payroll

Every lever here shares a requirement: it has to be set up correctly and run consistently. An S-Corp election means real payroll, on schedule, with the right salary. Reasonable compensation means a defensible number, documented. Accountable plans and retirement contributions mean formal plans and clean records.

This is not a switch you flip in April. It's a structure you build ahead of time and maintain all year — which is exactly the kind of proactive work most contractors never get from a firm that only files returns.

At Gonzalez & Company, we help construction and trades owners decide whether an S-Corp fits, set a reasonable salary that holds up, run the payroll, and layer in the rest. If self-employment tax is taking a bite you can feel, let's coordinate a plan that fits your business.