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S Corp vs. LLC: What’s the Difference—and Which Fits Your Books?

· 10 min read
Mike Thrift
Mike Thrift
Marketing Manager

Choosing a business structure is one of the first real “finance” decisions you’ll make. For most small teams and solo founders who want liability protection and pass-through taxation, the short list is usually an LLC or an S corporation.

This guide explains how they differ—legally, operationally, and on your tax return—and shows how to keep clean, audit-proof records for either structure in Beancount.io (plain-text, double-entry accounting that scales from freelancer to S corp).

2025-08-11-s-corp-vs-llc


At a Glance

S CorpLLC
What it isA tax status you elect with the IRS for a corporation or LLCA state-created legal entity with flexible governance
Liability shieldYesYes
OwnersUp to 100 U.S. shareholders; no entity ownersUnlimited members; entities and non-U.S. owners allowed (varies by state)
OperationsCorporate bylaws, directors/officers, meetings and minutesGoverned by operating agreement; fewer formalities
Classes of equityOne class of stock (economic rights must be identical)Flexible membership units and waterfalls
TaxationPass-through; files Form 1120-SDefault pass-through (Schedule C or Form 1065); can elect S or C taxation
Owner payOwners who work must take reasonable salary via payrollMembers take distributions; no payroll required for owners by default
Lifespan & transferPerpetual; shares generally transferableOften needs member consent to transfer; rules set in operating agreement
Fits best whenProfitable, owner-operators on payroll; cleaner investor signalingFlexible ownership, profit splits, or non-U.S./entity members; simpler operations

How They Actually Differ

While both LLCs and S corps offer a crucial liability shield, their legal and financial mechanics are fundamentally different. Here’s a deeper look at what sets them apart.

Formation and Formalities

A Limited Liability Company (LLC) is a legal entity created by state law. The process involves filing "articles of organization" with your state and adopting an "operating agreement," which is a flexible internal document that outlines how the business will be run and how profits will be split.

An S corporation, on the other hand, is not a legal entity itself but a tax election made with the IRS by filing Form 2553. This election can be applied to either a standard C corporation or an LLC. Once you elect S corp status, you must adhere to stricter corporate formalities, including drafting bylaws, appointing a board of directors and officers, holding annual meetings, and keeping detailed records of those meetings (known as "minutes").

Ownership & Investors

Ownership flexibility is a hallmark of the LLC. You can have an unlimited number of owners (called "members"), including individuals, other corporations, and foreign citizens. The operating agreement allows for custom profit splits ("waterfalls") and different classes of membership, which is ideal for complex partnerships.

The S corp is far more restrictive. It can have no more than 100 owners (called "shareholders"), all of whom must be U.S. citizens or residents. Other entities (like corporations or partnerships) cannot be shareholders. Furthermore, S corps can only have one class of stock, meaning all shareholders have identical economic rights (profits and distributions must be allocated proportionally to ownership). This simplicity can make the cap table cleaner but severely limits who can invest.

Taxes & Filings

By default, an LLC is a pass-through entity.

  • A single-member LLC is a "disregarded entity," meaning its income and expenses are reported on a Schedule C filed with the owner’s personal Form 1040.
  • A multi-member LLC files a partnership tax return, Form 1065, and issues a Schedule K-1 to each member detailing their share of the profit or loss.

An S corp is also a pass-through entity, but it files its own business tax return, Form 1120-S, and also issues K-1s to its shareholders. The key difference is that any owner who works for the company must be treated as an employee and paid a reasonable salary through a formal payroll system.

How Owners Get Paid

This is one of the most significant distinctions. LLC members are not employees. They get paid by taking distributions (or "draws") of the company's profits. Members are responsible for paying their own income and self-employment taxes (Social Security and Medicare) on their entire share of the net profits, regardless of how much cash they actually took out.

S corp owner-employees face a two-part system.

  1. Reasonable Salary: They must be paid a reasonable wage for the work they perform, which is subject to standard payroll taxes (FICA). The company pays the employer portion, and the employee pays their portion.
  2. Distributions: Any remaining profits can be paid out as distributions, which are not subject to self-employment or FICA taxes. This potential tax saving is the primary reason businesses elect S corp status. The IRS requires the salary to be "reasonable," so you can't pay yourself $1 and take the rest in distributions; you must document how you determined the salary amount.

Transferability & Lifespan

S corp stock functions like typical corporate shares. It is generally freely transferable (unless restricted by a shareholder agreement), and the corporation has a perpetual existence, meaning it continues even if a shareholder leaves or passes away.

Transferring ownership in an LLC is often more complex. The operating agreement dictates the rules, and it typically requires the consent of the other members to sell or transfer ownership units. This protects members from being forced into business with strangers but can make exiting the business more cumbersome.


Should You Elect S Corp Status for Your LLC?

A very common path for successful small businesses is to start as an LLC and elect S corp taxation later. This "LLC now, S corp when profitable" strategy allows you to enjoy the simplicity of an LLC in the early stages and switch for tax optimization once your income grows.

Founders typically make the switch when:

  • Profits are steady and significant. The amount paid in self-employment tax as an LLC member becomes greater than the FICA taxes on a reasonable salary plus the compliance costs of an S corp.
  • They desire more structure. The formal requirements of an S corp can enforce better financial discipline and send a more "serious" signal to lenders or future investors.

Electing S corp status for your LLC brings concrete changes:

  • You must set up and run payroll for all owner-employees.
  • You must adhere to corporate record-keeping, including holding meetings and documenting them with minutes.
  • Your annual tax preparation becomes more complex, requiring Form 1120-S and K-1s.

When is it better to remain an LLC?

  • You need flexible ownership structures, like special profit allocations or having a corporation or foreign partner as a member.
  • Your profit is volatile or you are still in the early stages. The overhead and cost of running payroll might not be worth it yet.
  • You plan to issue complex equity, like token-based compensation or preferred units, that don't fit the S corp's "one class of stock" rule.

Practical Rule of Thumb: Before you switch, model your next 12 months of expected profit. Calculate your total tax burden (income + self-employment tax) as an LLC. Then, calculate your total tax burden as an S corp (income tax + FICA tax on a reasonable salary). If the savings from the S corp structure are clear, recurring, and outweigh the added compliance costs, the election is worth a serious look. Be sure to document your analysis for determining a "reasonable salary."


How to Keep Either Structure Clean in Beancount.io

No matter which entity you choose, chaotic books can undermine your liability protection and create tax-time nightmares. Beancount.io gives you a plain-text, double-entry ledger with automated imports and tax-ready reports, so your legal structure doesn’t turn into bookkeeping sprawl.

Chart of Accounts Suggestions

A clean chart of accounts is the foundation. Here are our recommendations:

  • For an LLC:
    • Equity:Member-Capital (for initial and subsequent contributions)
    • Equity:Member-Distributions (for owner draws)
    • Standard Income and Expense accounts.
  • For an S corp:
    • Equity:Common-Stock (for capital contributions)
    • Equity:Retained-Earnings (where profits accumulate)
    • Expenses:Payroll:Wages
    • Expenses:Payroll:EmployerTaxes
    • Equity:Shareholder-Distributions (for payments out of profit)

Example Entries

Here’s how common owner payments look in a Beancount.io ledger.

LLC member distribution: This transaction records a $5,000 payment to a member, reducing cash and tracking the draw in a dedicated equity account.

2025-03-15 * "Member distribution"
Assets:Bank:Checking -5,000 USD
Equity:Member-Distributions 5,000 USD

S corp owner salary (from a payroll run): This entry captures the gross wage, the employer's share of payroll taxes, and the total cash leaving the bank. Withholding liabilities would also be tracked here.

2025-03-31 * "Owner payroll"
Expenses:Payroll:Wages 8,000 USD
Expenses:Payroll:EmployerTaxes 612 USD
Assets:Bank:Checking -8,612 USD
Liabilities:Payroll:Withholding 0 USD ; Net pay + withholdings

S corp shareholder distribution: This is a simple transfer from cash to the shareholder distribution equity account, separate from payroll.

2025-04-10 * "Shareholder distribution"
Assets:Bank:Checking -10,000 USD
Equity:Shareholder-Distributions 10,000 USD

Close the Loop at Tax Time

With a clean Beancount.io ledger, tax season is streamlined:

  • Generate your Profit & Loss and Balance Sheet statements directly from your transactions.
  • Export the data your accountant needs for your specific tax form (Schedule C, 1065, or 1120-S).
  • Keep your reasonable salary memos, meeting minutes, and other compliance documents alongside your transactions for a complete, audit-ready financial record.

When Each Choice Shines

Here's the decision in a nutshell.

Choose (or remain) an LLC if you want:

  • Maximum flexibility in ownership, profit splits, or bringing in entity/foreign members.
  • Minimal corporate formalities and no mandatory owner payroll.
  • Simpler compliance while you are finding product-market fit or have inconsistent profits.

Choose (or elect) an S corp if you want:

  • Potential savings on self-employment (FICA) taxes once your profits can justify a formal payroll.
  • A clean, traditional corporate structure with straightforward stock transferability.
  • A governance model that investors and lenders often prefer for established operating companies.

Bottom Line

Both LLCs and S corps protect your personal assets and allow business profits to pass through to the owners for tax purposes. The best fit depends entirely on your ownership structure, your expected profitability, and your appetite for formal governance and payroll.

Whichever you choose, disciplined bookkeeping matters far more than the entity's label. Keep your financial records precise, searchable, and reproducible with Beancount.io.


Build Tax-Ready, Investor-Ready Books with Beancount.io

  • Plain-text, version-controlled double-entry accounting.
  • Clean charts of accounts designed for LLCs and S corps.
  • Automated bank, credit card, and processor imports and reconciliations.
  • Tax-ready exports and seamless accountant collaboration.
  • A system that scales from a solo founder to a multi-entity enterprise.

Start a streamlined ledger for your entity today with Beancount.io.


This guide is for informational purposes and is not legal or tax advice. Consult your attorney or tax advisor for guidance specific to your situation.