The Solo Attorney’s Guide to Business Structures

Executive Summary & Key Points

The Big Picture

Most solo attorneys begin their careers without a formal business structure, which the IRS classifies as a “Sole Proprietorship.” This default status is the most expensive and risky way to practice law because it offers zero protection for your personal assets and subjects 100% of your income to income tax and self-employment taxes. Transitioning to a PLLC creates a necessary legal barrier between your firm’s liabilities and your personal wealth. Once your firm achieves consistent profitability, electing S-Corp status allows you to reduce your tax burden by thousands of dollars annually through a strategic split between salary and distributions.

This guide will give you an overview.  It is not legal advice or professional tax advice.

The Cheat Sheet

• Asset Protection: A PLLC or LLC serves as a legal “shield.” It ensures that business debts, office leases, and vendor disputes stay with the business, protecting your home, personal savings, and family assets.
  
• The “P” for Professionals: Many states require attorneys to form a Professional LLC (PLLC) or a Professional Corporation (PC). This ensures that while you have business protection, you remain personally accountable for your professional legal advice and malpractice.
  
• Tax Arbitrage (S-Corp Savings): By electing S-Corp status, you only pay self-employment taxes (15.3%) on your “reasonable salary” rather than your entire firm profit. This single change typically saves attorneys between $5,000 and $15,000 in taxes every year.
  
• Operational Integrity: Your business structure is only legally valid if you treat it like a separate entity. This requires dedicated business bank accounts and clean accounting to maintain separation and avoid IRS “veil-piercing.”

The Five-Year Commitment: Choosing a tax structure is a long-term decision. The IRS generally restricts you from changing your tax election more than once every five years, making it critical to choose correctly the first time.

The Business of Law

You spent years earning your degree, but law school rarely teaches you how to structure a firm. Most solo practices start with a single client and no clear business plan. Without a formal setup, the IRS views you as “Self-Employed.” In the tax world, being “Self-Employed” is often the most expensive way to work. It means you are personally liable for business mistakes, and you are likely paying the highest tax rates possible. My job over the last 15 years has been to move attorneys out of this “default” setting and into a structure that protects their assets and their income.

The Sole Proprietorship: The Default Setting

A sole proprietorship is not a legal entity. It is simply an individual doing business. If you have not filed articles of organization with your state, this is your current status.

Why it is Dangerous

In a sole proprietorship, there is no legal separation between the owner and the business. If your firm is sued or cannot pay its debts, your personal assets—including your home, car, and savings—are at risk. This includes liability for office leases, employee disputes, or accidents that happen on your business premises.

Tax Implications: The 15.3% Penalty

The IRS taxes 100% of your business profit at two levels:

1. Income Tax: Based on your personal tax bracket.
2. Self-Employment Tax: A flat 15.3% tax that covers Social Security and Medicare.

Because you pay that 15.3% on every dollar you earn (up to the Social Security wage base), you are effectively paying more than many large corporations. You are paying both the employer and the employee portion of these taxes yourself.

CPA Pro-Tip: Many attorneys use a “DBA” (Doing Business As) and assume they are protected. A DBA is only a name. It provides zero legal protection. If you are operating under a DBA, you are still a sole proprietor in the eyes of the law.

LLC and PLLC: The Liability Shield

The Limited Liability Company (LLC) is a formal legal entity. It is designed to provide the protection of a corporation with the simplicity of a small business.

LLC vs. PLLC

In many states, professionals like attorneys cannot form a standard LLC. You must form a Professional Limited Liability Company (PLLC). The rules vary by state, but the primary difference is that a PLLC requires proof of your law license. It does not protect you from personal malpractice, but it does protect you from:

• Debts of the business (such as office leases or equipment loans).
• Liability for the actions of employees or partners.
• Personal liability for general business lawsuits.

How it is Taxed

By default, the IRS ignores the LLC. They call it a “disregarded entity”, or you may hear it called a single-member LLC. You still pay taxes on your personal return just like a sole proprietor. The LLC is a legal choice, not a tax choice. It creates the “shield” but does not yet create the “tax savings.”

CPA Pro-Tip: You must ensure that your “Operating Account” is strictly for business. If you pay your mortgage or personal groceries out of your LLC account, a court can “pierce the corporate veil.” This means they can ignore your LLC protection because you didn’t treat the business like a separate entity.

The S-Corp: The Tax Efficiency Strategy

The S-Corp is not a type of company you form at the state level. It is a tax election you make with the IRS. You can be an LLC or PLLC that “chooses” to be taxed as an S-Corp.

The Tax Advantage: Distributions vs. Salary

The S-Corp allows you to split your income into two categories:

1. W-2 Salary: You pay yourself a “reasonable” salary as an employee of your firm. You pay the 15.3% self-employment tax only on this amount, up to the annual Social Security wage base.
   
2. Distributions: The profit remaining after your salary is paid is distributed to you as a shareholder. These distributions are not subject to the 15.3% self-employment tax, which is the primary source of your tax savings. [Note: Taking these funds incorrectly can lead to IRS penalties. To see the exact steps for moving this money to your personal account, read our guide: When and How to Take Distributions from Your S Corporation]

The Detailed Math of an S-Corp

Let’s look at a solo attorney with $150,000 in annual profit.

Tax Type	Sole Proprietor / LLC	S-Corp Election
Gross Revenue	$250,000	$250,000
Business Expenses	$100,000	$100,000
Net Profit	$150,000	$150,000
W-2 Salary	N/A	$70,000*
Shareholder Distribution	$150,000	$80,000
Self-Employment Tax (15.3% on $150k vs $70k)	$22,950	$10,710
Total Tax Savings	$0	$12,240

By electing S-Corp status, this attorney keeps an extra $1,020 per month in their pocket. Over a decade, that is over $120,000 in wealth that stayed with the attorney instead of the IRS.

• The IRS does specify that this salary must be considered “reasonable compensation”.  When we are working with a new client we have an IRS approved method for helping you come up with a reasonable amount.

Requirements for S-Corp Status

• Reasonable Salary: You cannot pay yourself $0 to avoid taxes. Your salary must be comparable to what other attorneys with your experience earn in your geographic area.
  
• Payroll Processing: You must run a formal payroll and withhold taxes (Social Security, Medicare, Federal, and State income taxes).
  
• Separate Tax Return: You must file Form 1120-S every year. This is a business tax return that is due by March 15th, earlier than your personal return.

The C-Corp: Why It Fails Solo Attorneys

A C-Corporation is a separate legal and tax-paying entity. While large companies use this structure, it is rarely the best choice for a solo law firm due to the Double Taxation problem.

The Double Taxation Mechanics

1. The corporation pays a corporate tax (currently 21%) on its profits.
2. When you take that money out as a dividend, you pay personal income tax on it again.
3. This often leads to a total effective tax rate that is higher than an S-Corp.

When to Consider a C-Corp

A C-Corp only makes sense if:

• You plan to keep millions of dollars of profit inside the company to reinvest in growth rather than taking it out as income.
  
• You want to offer specific “fringe benefits” like tax-deductible health insurance for owners that S-Corps cannot offer in the same way.

The Transition Roadmap: Moving from Sole Prop to S-Corp

Transitioning your firm is a process that requires attention to detail. Follow these steps to ensure you do not lose your liability protection.

Step 1: Form the Entity

File your Articles of Organization with the Secretary of State. Ensure you use the correct designation (LLC or PLLC) required by your State Bar.

Step 2: Obtain an EIN

Your “Employer Identification Number” is like a Social Security Number for your business. You will use this for banking and tax filings.

Step 3: Open Business Bank Accounts

You must open a new Operating account and a new Trust (IOLTA) account under the new EIN. Do not use your old sole-proprietorship accounts.

Step 4: File Form 2553

To be taxed as an S-Corp, you must file this form with the IRS. To be effective for the current year, it must be filed within 75 days of forming your LLC or by March 15th of the current year.

Step 5: Setup Payroll

Use a provider like Aligned CPA to handle your W-2 salary. This ensures that federal and state taxes are paid on time, avoiding massive penalties.

Advanced Tax Planning: Retirement and S-Corps

One of the most overlooked benefits of the S-Corp structure for attorneys is the Solo 401(k).

Maximize Your Contributions

As an S-Corp owner/employee, you can contribute to a Solo 401(k) in two ways:

1. Employee Contribution: Up to $24,500 (for 2026) taken from your salary.
   
2. Employer Contribution: Your firm can contribute up to 25% of your W-2 salary as a profit-sharing contribution.

This allows high-earning solo attorneys to shield up to $72,000 per year from income taxes.

How Often Can You Change Your Structure?

The IRS does not allow you to “flip-flop” between tax statuses to chase the lowest rate each year.

• The Five-Year Rule: If you elect S-Corp status and later decide to go back to being a regular LLC, you generally cannot elect S-Corp status again for five years.
  
• The “Reasonable Cause” Exception: If you miss a deadline, you can sometimes file for a “Late Election,” but it requires a CPA’s assistance and a valid reason for the delay.

FAQ Section

Conclusion

The “Business of Law” requires as much attention as the “Practice of Law.” Staying as a sole proprietor is a risk to your personal assets and a drain on your income. Transitioning to a PLLC provides immediate protection, and electing S-Corp status ensures you are not overpaying on self-employment taxes.

Building a profitable, compliant firm requires the right legal structure and the right technology. By combining a tax-efficient entity with clean data from Clio, you ensure that your firm serves your financial future rather than just paying the IRS.

Ready to optimize your firm’s taxes? Let’s review your current Profit and Loss statement and your Clio data. We can determine exactly how much an S-Corp switch will save you this year.

Book a Discovery Meeting with our Tax Planning Team