LLC vs Sole Proprietorship Taxes: What’s the Difference?

Introduction

Choosing between an LLC and a sole proprietorship is one of the first decisions new business owners face. While many focus on liability protection, taxes are often the deciding factor.

Here’s the truth that confuses most entrepreneurs: By default, the IRS taxes a single-member LLC exactly like a sole proprietorship. Both are considered disregarded entities for tax purposes. You report business income on Schedule C and pay self-employment tax.

So why do accountants still recommend LLCs? Because an LLC gives you options that a sole proprietorship doesn’t — including the ability to elect S-Corp taxation and save thousands on self-employment tax as you grow.

Quick Answer: Are LLC Taxes Different?

How Sole Proprietorship Taxes Work

A sole proprietorship is not a separate legal entity. The IRS doesn’t distinguish between you and your business for tax purposes.

1. Income Tax

You pay federal and state income tax on your net business profit. Profit is calculated as revenue minus business expenses on Schedule C. That profit is added to your other income (W-2, investments) and taxed at your marginal personal income tax rate (10%-37% federal).

2. Self-Employment Tax

Because you don’t have an employer withholding Social Security and Medicare, you pay both the employee and employer share: 15.3% on your first $168,600 of net earnings (2024) + 2.9% beyond that. Plus 0.9% additional Medicare tax over $200k single / $250k married.

3. Quarterly Estimated Taxes

You must pay quarterly estimated taxes (Form 1040-ES) if you expect to owe $1,000+ in taxes. Due dates: April 15, June 15, Sept 15, Jan 15.

How LLC Taxes Work (Default)

A single-member LLC is a disregarded entity by default. The IRS treats it exactly like a sole proprietorship — but with one huge advantage: legal separation without tax complexity.

Same Filing, Same Tax

Like a sole proprietorship, you file Schedule C, Schedule SE, and Form 1040. You pay income tax + 15.3% self-employment tax on net profit. No separate LLC tax return required (unless you have partners — then it’s Form 1065 partnership return).

Where LLC Wins for Taxes

• Tax election flexibility: You can elect to be taxed as S-Corp (save on SE tax) or C-Corp (retain earnings) by filing Form 2553 or 8832. A sole proprietorship cannot elect corporate taxation — you must first form an LLC or corporation.
• Credibility for deductions: While the tax law is the same, having an LLC with separate bank account and EIN makes it easier to prove business intent and defend deductions in an audit.
• No double taxation by default: Like sole proprietorship, profits pass through once. Unlike C-Corp.

Side-by-Side Comparison

Self-Employment Tax Breakdown

This is the biggest tax burden for both sole proprietors and LLC owners. For 2024-2025:

• 12.4% Social Security (on up to $168,600)
• 2.9% Medicare (no limit)
• 0.9% Additional Medicare tax over $200k single / $250k joint
• Total: 15.3% flat on most small business profits

Example: You net $60,000 profit.

LLC Tax Elections: S-Corp & C-Corp

This is where LLCs become powerful tax tools — something a sole proprietorship can never do.

1. S-Corp Election (Most Popular)

File Form 2553 within 75 days of formation or by March 15 for existing LLCs. You remain an LLC legally but are taxed as S-Corp.

• Pay yourself reasonable salary via payroll (requires Gusto or similar)
• Salary subject to payroll taxes (15.3%)
• Remaining profit taken as distribution — NOT subject to self-employment tax
• File Form 1120-S + K-1s + still file personal return
• Best when net income consistently $40k-$50k+

2. C-Corp Election

File Form 8832. LLC taxed as C-Corp. Useful if you want to retain earnings in business or seek venture capital. Beware double taxation (21% corporate + dividend tax).

Deductions & Write-Offs

Both sole proprietorships and LLCs can deduct the same business expenses on Schedule C:

Filing Requirements & Forms

Sole Proprietorship

• Schedule C (Profit or Loss from Business)
• Schedule SE (Self-Employment Tax)
• Form 1040 + state return
• Quarterly 1040-ES if owe $1k+

Single-Member LLC (Default)

• Same as sole proprietorship: Schedule C, SE, 1040
• Plus LLC annual report to state (most states)
• If elect S-Corp: Form 1120-S, K-1, Form 941 payroll, W-2s

When Should You Switch to LLC?

From a tax perspective alone, switch when:

• You’re consistently profitable $40k+: S-Corp election can save $3k-$10k/year in SE tax
• You want to hire employees: LLC with EIN and payroll (Gusto) looks more professional and simplifies W-2s
• You need liability protection: Not tax-related, but critical — sole proprietors risk personal house, car, savings
• You plan to get business credit: LLC can build business credit and get business bank accounts

Frequently Asked Questions

Does an LLC save taxes vs sole proprietorship?
By default, no. Both pay same income tax and self-employment tax. LLC saves taxes only when you elect S-Corp status at higher profit levels.

Can I switch from sole proprietorship to LLC mid-year?
Yes. Form LLC anytime. For tax purposes, you file one Schedule C for the whole year — just note you became LLC. If electing S-Corp, election effective date matters.

Do I need an EIN for LLC taxes?
Single-member LLC with no employees can use SSN, but EIN recommended for banking and credibility. Required if electing S-Corp or hiring employees.

What is reasonable salary for S-Corp?
IRS requires reasonable compensation for your role, location, industry. Typically 40%-60% of net profit for small LLCs. Consult CPA and use payroll software like Gusto.

Best LLC Formation Services for Tax Flexibility

If you decide an LLC is right for you (for tax flexibility and liability protection), we recommend these two services that make formation easy and help with S-Corp election later:

Best Overall Value

Bizee

Why We Recommend Bizee for Taxes

• $0 + state fee to form LLC — keep cash for taxes
• Free registered agent first year ($199 value)
• S-Corp election support when you’re ready to save on SE tax
• Free EIN + operating agreement — required for S-Corp payroll
• Over 1,000,000 LLCs formed since 2004

Start LLC with Bizee →

Best Worry-Free Compliance

ZenBusiness

Why We Recommend ZenBusiness for Taxes

• Worry-Free Compliance — annual report reminders so you stay compliant
• S-Corp filing service included in higher plans
• Best for S-Corp payroll — integrates with Gusto
• Free accounting consultation to plan tax strategy
• Excellent support for tax elections and filings

Start LLC with ZenBusiness →

Final Verdict

Taxes are identical at the start. Both sole proprietorship and single-member LLC report on Schedule C and pay 15.3% self-employment tax. Neither is better for taxes on day one.

LLC wins long-term for taxes because it gives you options:

• Start simple — taxed like sole proprietorship
• When profitable ($40k+ net), elect S-Corp and save thousands on SE tax
• Maintain liability protection the entire time — sole proprietorship never offers this
• Look more professional to banks, clients, and the IRS for deductions

If you’re serious about your business, the LLC is worth the small state fee ($40-$300) for tax flexibility and asset protection. Pair it with Bizee or ZenBusiness for formation (Bizee is cheapest $0 + state fee, ZenBusiness is best for worry-free compliance and S-Corp filing), then use Gusto for payroll when you elect S-Corp, Melio for free bill pay, and Wise for international payments.