LLC vs. S-Corp for Contractors: How to Compare the Tax Tradeoffs

A contractor can have an LLC and be taxed as an S-Corp. The useful question is whether changing the LLC’s federal tax treatment improves the business’s overall position after owner pay, taxes and administrative costs.

There is no standard annual savings amount or profit threshold that answers that question. A business whose earnings depend mainly on the owner’s field work can reach a different result from one earning the same profit through employees and equipment.

This guide focuses on an owner-operated contracting business comparing default single-member LLC taxation with an S-Corp election. The numerical illustration uses 2026 federal employment-tax rules. It is a hypothetical calculation, not a client result or a recommendation for your salary.

An LLC is a legal structure; S-Corp is a tax election

An LLC is formed under state law. For federal income-tax purposes, a domestic single-member LLC is generally disregarded unless it elects corporate treatment. An individual owner typically reports an operating business on Schedule C. A domestic LLC with multiple members generally defaults to partnership treatment, which requires a separate analysis.

An eligible LLC can elect S-Corp taxation without ceasing to be an LLC under state law. Review the operating agreement and ownership terms when considering that election. IRS: LLC tax classification.

S-Corp eligibility includes a domestic entity, permitted shareholders, no more than 100 shareholders and one class of stock. Certain trusts and estates can qualify; partnerships, corporations and nonresident aliens generally cannot be shareholders. Shareholder consent is required. IRS: S corporations.

How default LLC self-employment tax works

For a sole proprietor, the regular calculation generally applies to 92.35% of net self-employment profit, rather than every dollar of revenue or profit. The combined rate is 15.3%: 12.4% Social Security and 2.9% Medicare. The deductible portion of self-employment tax affects income tax; it does not erase the employment-tax bill. IRS Topic 554, IRS self-employment tax guidance.

For 2026, the Social Security earnings ceiling is $184,500. Medicare has no corresponding ceiling. Other wage income and possible Additional Medicare Tax also matter, so a flat 15.3% estimate becomes unreliable across different households and income levels. Social Security taxable maximum, IRS Additional Medicare Tax guidance.

Use a reconciled profit-and-loss statement as the starting point. Revenue, cash in the bank and the owner’s draws are different numbers. A busy contractor buying materials ahead of collections needs a cash forecast as well as a tax comparison.

What changes under S-Corp taxation

A shareholder who works in the business must receive reasonable compensation for services before payments are treated as non-wage distributions. Salary generally attracts payroll taxes, including an employer share paid by the company. The IRS can reclassify distributions as wages when compensation is inadequate. IRS: S corporation compensation.

Qualifying S-Corp pass-through business income generally is not subject to self-employment tax. It is still part of the owner’s income-tax picture. Allocated earnings can be taxable even when the business retains the money; a cash distribution has separate stock-basis rules. Profit and distributions are not interchangeable. IRS: S corporation stock and debt basis.

A worked example with both sides of payroll tax

Assume a single owner has $150,000 of business profit before owner wages and employer payroll taxes. For the S-Corp comparison, assume an independent compensation review supports $90,000 of annual wages. That wage figure is an example input, not a recommended contractor salary.

Also assume no other wages or self-employment income, no Additional Medicare Tax and no special adjustments. Both tax bases are below the 2026 Social Security ceiling. Figures below are rounded to cents.

The illustrated employment-tax difference is $7,424.33. This is not net tax savings. It excludes federal and state income-tax effects, the qualified business income deduction, unemployment taxes, retirement contributions, health benefits, payroll services and return-preparation costs. The remaining S-Corp profit is not a promise that the same amount is available to withdraw.

The payroll calculation includes 6.2% Social Security and 1.45% Medicare for each of the employer and employee. The sole-proprietor calculation uses the separate self-employment adjustment. IRS Publication 15, IRS Topic 554.

Ask for the same comparison using your supported compensation figure and full tax return. Do not use “profit minus salary, multiplied by 15.3%” as a shortcut for net savings.

Build the salary analysis around the owner’s work

For a contractor, the analysis should account for estimating, field work, supervision, purchasing, customer relationships and administration. Document time, responsibilities, experience and comparable compensation. Consider whether receipts arise from the owner’s services, other employees or equipment.

A fixed salary-to-distribution ratio does not establish reasonable compensation. Keep the supporting records and revisit them as your role changes. IRS compensation factors.

An owner moving from installing work personally to managing a team should have that change reflected in the analysis. Choosing a salary simply because it produces a preferred savings number reverses the process.

Compare income taxes, benefits and recurring costs

The employment-tax illustration is only one part of the decision:

• Qualified business income deduction: eligible owners may deduct up to 20% of QBI, subject to limits. S-Corp reasonable compensation is excluded from QBI. Changing owner pay can therefore change the income-tax result. IRS QBI guidance.
• Retirement contributions: S-Corp shareholder distributions are not earned income for retirement-plan purposes. Model contributions using eligible compensation and the plan’s rules. IRS retirement-plan FAQs.
• Owner health insurance: more-than-2% shareholder coverage has special payment and W-2 reporting rules. Confirm the treatment before assuming it follows ordinary employee benefits. IRS S-Corp health insurance guidance.
• State and local obligations: ask your preparer to identify the taxes, elections and filings in each place you operate. A federal election is not a complete state-tax analysis.
• Administration: obtain actual quotes for payroll, the corporate return, bookkeeping and required filings. Generic fee ranges cannot establish your cost.

An S-Corp generally files Form 1120-S and provides shareholder reporting, alongside its employment-tax obligations. Set responsibility for deposits and filings before the election takes effect. IRS S corporation filing information, IRS employer tax guide.

When keeping the current tax treatment may make sense

An election deserves closer scrutiny when documented owner compensation would absorb most earnings, profit is inconsistent, or recurring costs use up the modeled benefit. If ownership plans are incompatible with S-Corp eligibility, address that before filing.

Include a slower-year scenario in the comparison. For example, ask whether the business could maintain the proposed payroll schedule through a seasonal drop in collections. That is an operating question even when the annual tax projection looks favorable.

Selling the business, admitting an investor or carrying losses adds questions that this single-owner illustration cannot answer. Have your advisers model those facts separately instead of treating a current-year employment-tax difference as the whole decision.

Confirm eligibility and the election date before filing

Form 2553 is generally due no more than two months and 15 days after the beginning of the tax year the election is to take effect, or during the preceding tax year. Calculate the deadline for your facts; “75 days after forming an LLC” is not a universal rule.

Missing the normal deadline does not automatically require waiting another year. Late-election relief may be available, with specific eligibility and filing conditions. Confirm the effective date, shareholder consent, IRS acceptance and coordinated payroll and return filings. IRS Form 2553 instructions.

Before the discussion, gather:

1. Your most recent business and personal returns, plus current financial statements.
2. A description of each owner’s work, hours and compensation records.
3. Other wage income, current benefits and retirement-plan details.
4. Ownership documents, state filing history and any planned ownership changes.
5. Proposed payroll and compliance costs, plus a cash forecast covering seasonal needs.

Request a written comparison that shows assumptions, the effective date and the conditions under which the election would stop making sense. Our LLC and S-Corp guide adds state-tax considerations, and the contractor tax scorecard can help organize the broader planning discussion.