Small Business Taxes for LLC Owners: The Complete 2026 Guide

Small business taxes come down to three separate bills stacked on the same income: self-employment tax at 15.3%, federal income tax at your bracket, and state income tax unless you live in one of the nine states without it. A single-member LLC clearing $100,000 in profit typically owes about $26,700 across all three, or roughly 27% of net profit.

Four new deductions arrived for the 2026 tax year, the S corp election remains the largest single lever for owners above $80,000 in profit, and the quarterly payment schedule catches people who have only ever had taxes withheld from a paycheck. This guide covers the full picture, with links to detailed walkthroughs of each piece.

Key Takeaways

• Small business taxes for an LLC flow onto your personal return by default. The LLC itself pays nothing federally.
• Self-employment tax of 15.3% applies before any bracket logic, which is why the total lands higher than most owners expect.
• The QBI deduction removes 20% of qualified business income from the taxable base and is now permanent.
• Four new deductions for tips, overtime, car loan interest, and seniors are claimed together on Schedule 1-A.
• Quarterly payments are required once you expect to owe $1,000 or more.
• An S corp election starts saving money around $60,000 to $80,000 of net profit.

Where Your Revenue Actually Goes

Self-employment tax is the largest single tax line and the one people underestimate, because employees only ever see half of it on a pay stub. Understanding small business taxes starts with accepting that 15.3% arrives before your bracket does anything.

How Your Structure Decides the Bill

Structure	Files	SE tax on profit	Payroll required
Sole proprietor	Schedule C	All of it	No
Single-member LLC	Schedule C	All of it	No
Multi-member LLC	Form 1065 + K-1	Generally all	No
LLC with S corp election	Form 1120-S + K-1	Salary portion only	Yes
C corporation	Form 1120	Salary portion only	Yes

Forming an LLC changes your legal liability, not your small business taxes. The IRS treats a single-member LLC as a disregarded entity, meaning profit lands on Schedule C exactly as it would for a sole proprietor. Nothing about the tax math changes on the day you file articles of organization.

What does change the math is an election. Choosing S corporation treatment splits profit into a salary that carries payroll tax and distributions that do not. Our full comparison of LLC versus S corp taxes covers the structural differences, and the breakeven analysis sits in when an S corp election makes sense.

Self-Employment Tax: The 15.3% Baseline

Self-employment tax funds Social Security and Medicare. Employees split it with their employer at 7.65% each. Owners pay both halves.

The rate applies to 92.35% of net earnings, breaking into 12.4% for Social Security up to the 2026 wage base of $184,500 and 2.9% for Medicare with no ceiling. An additional 0.9% Medicare surtax kicks in above $200,000 for single filers.

One partial offset: half of your self-employment tax comes off your income before income tax applies. On $100,000 of net profit, the $14,130 of SE tax generates a $7,065 deduction against income tax. It softens the blow without removing it.

Federal Income Tax and the QBI Deduction

After the SE tax deduction and your standard deduction, the qualified business income deduction removes another 20% of qualified business income from the taxable base. Congress made it permanent in 2025 legislation, so it remains part of small business taxes going forward.

That deduction explains why the effective rate on $100,000 of profit lands near 27% rather than the 37% you would guess by adding 15.3% to a 22% bracket. Two large deductions apply before the brackets ever touch your income.

Specified Service Trades or Businesses face limits above certain income thresholds. Consultants, lawyers, accountants, financial advisors, and health practitioners all fall into that category, and the deduction phases down for them above roughly $197,300 single.

The Four New Deductions on Schedule 1-A

The One Big Beautiful Bill created four deductions that changed small business taxes for 2026. All four are claimed on the same new form, and all four work alongside the standard deduction.

• Qualified tips, up to $25,000. Self-employed workers in listed occupations qualify, capped at net income from that business. See no tax on tips for self-employed workers.
• Qualified overtime, up to $12,500. FLSA non-exempt employees only, which excludes owners. If you employ hourly staff, new W-2 reporting applies. See no tax on overtime.
• Car loan interest, up to $10,000. New US-assembled vehicles with more than 50% personal use. See the car loan interest deduction.
• Senior deduction, up to $6,000 for filers 65 and older.

The mechanics of the form itself, including how the phaseouts differ between deductions, are covered in our walkthrough of Schedule 1-A. All four run through tax year 2028.

Quarterly Payments and Deadlines

Once you expect to owe $1,000 or more, small business taxes get paid across the year rather than in April. Paying 100% of last year’s total tax, or 110% if your AGI topped $150,000, satisfies safe harbor and eliminates penalty risk regardless of how the current year performs.

The payment periods are not equal quarters, which trips up nearly everyone. The full schedule, the safe harbor math, and what the penalty actually costs are covered in our guide to quarterly estimated taxes. Deciding how much to hold back each month is a separate question, answered in how much to set aside for taxes.

Deductions Worth Tracking

Every legitimate business expense reduces both income tax and self-employment tax, which makes deductions roughly twice as valuable to an owner as to an employee. The categories that matter most:

• Home office. Simplified method pays $5 per square foot up to 300 feet. The actual expense method often pays more.
• Vehicle. Standard mileage or actual expenses, chosen carefully since it interacts with the car loan interest deduction.
• Health insurance premiums. Deductible above the line, subject to rules covered below.
• Retirement contributions. Solo 401(k) or SEP-IRA, the largest discretionary lever most owners have.
• Software, subscriptions, and equipment. Section 179 and bonus depreciation allow immediate expensing in many cases.
• Professional fees. Accounting, legal, and bookkeeping costs.
• Business meals. Generally 50% deductible with documentation of the business purpose.
• Education and training that maintains or improves skills in your current field.

Retirement contributions deserve particular attention because they do double duty. They cut taxable income and they move money into your own account rather than the Treasury’s, and for owners near an income threshold they can restore deductions that phase out.

Health Insurance

Premiums for you, your spouse, dependents, and children under 27 are deductible above the line, limited to your net self-employment income. The most-missed disqualifier: eligibility for an employer plan through a spouse blocks the deduction for those months, whether or not either of you enrolls.

For 2027, premiums are rising again and the ACA subsidy cliff has returned at 400% of the federal poverty level. Owners with controllable income can manage modified AGI to stay under it, which is often worth several thousand dollars. Details in our guide to self-employed health insurance.

1099 Reporting: What You Receive and What You File

Two reporting thresholds changed for 2026, and both affect small business taxes on the paperwork side rather than the liability side.

Payment platforms issue a 1099-K only when you exceed $20,000 and 200 transactions, though nine states set far lower limits. Separately, the 1099-NEC threshold rose from $600 to $2,000 for payments made on or after January 1, 2026.

Fewer forms does not mean less tax. All income is reportable whether a form arrives or not, and the gross figure on a 1099-K is not your taxable income. Our breakdown of the 1099-K threshold covers both sides, including what you must file for contractors you pay.

The Whole Cluster in One Map

Recordkeeping That Survives an Audit

Open a dedicated business bank account before anything else. Commingling personal and business money is the single most common reason small business taxes become expensive to defend, because reconstructing which transactions were business becomes guesswork.

Keep receipts for anything you deduct, log business mileage contemporaneously rather than reconstructing it in April, and reconcile monthly rather than annually. The IRS generally has three years to examine a return, extending to six if income was substantially understated, so retain records for at least seven years.

Bookkeeping software costs $15 to $50 a month and eliminates most of this friction. Owners past roughly $75,000 in revenue usually find a bookkeeper cheaper than their own time.

State Taxes Vary Widely

Nine states levy no personal income tax, which changes the arithmetic considerably. Others impose entity-level obligations on top of personal tax: California charges S corporations a 1.5% franchise tax with an $800 minimum, New York City ignores the federal S election entirely, and Tennessee applies its own excise tax.

Many states also require annual reports or franchise fees regardless of profit. Check your state before assuming federal planning translates, particularly when weighing an S corp election.

When to Hire Help

Handle small business taxes yourself while your situation stays simple: one income stream, no employees, no inventory, profit under roughly $50,000. Software handles that competently for a couple hundred dollars.

Bring in a CPA when you elect S corp status, hire employees, operate in multiple states, carry inventory, or clear $100,000 in profit. Expect $800 to $2,500 for a business return, which usually pays for itself in the first year through elections and deductions you would have missed.

The mid-point option is a one-hour planning consultation each autumn. Several hundred dollars buys a review of your structure, your estimated payments, and any year-end moves worth making before December 31.

FAQ

How much should I expect to pay in small business taxes?

Roughly 25% to 30% of net profit for most owners earning between $30,000 and $100,000. High earners in high-tax states can reach 35% to 40%.

Does forming an LLC lower my taxes?

No. An LLC changes legal liability. A single-member LLC is taxed exactly like a sole proprietorship until you make an S corp election.

What is the self-employment tax rate for 2026?

15.3% on 92.35% of net earnings, with the 12.4% Social Security portion capped at the $184,500 wage base and 2.9% Medicare applying without limit.

When do I have to start paying quarterly?

Once you expect to owe $1,000 or more after withholding and credits.

Can I deduct my home office?

Yes, if the space is used regularly and exclusively for business. The simplified method pays $5 per square foot up to 300 square feet.

At what profit does an S corp election make sense?

Around $60,000 in consistent net profit, becoming clearly worthwhile above $80,000 for most service businesses in most states.

Do the new 2026 deductions apply to business owners?

Partly. Tips and car loan interest can apply to self-employed people who meet the rules. Overtime cannot, because it requires FLSA-covered employment.

What happens if I file late?

Failure to file runs 5% of unpaid tax per month up to 25%, considerably worse than failure to pay at 0.5% per month. File on time even when you cannot pay in full.

Are business meals still deductible?

Generally at 50%, with documentation of the attendees and business purpose.

How long should I keep tax records?

At least seven years. The IRS normally has three years to examine a return and six when income was substantially understated.

Sources: IRS, limited liability company · IRS, self-employment tax · IRS, estimated taxes · IRS, qualified business income deduction