S Corp vs. C Corp: Advantages and Disadvantages for Beancount.io Users
Choosing the right business entity is one of the most critical decisions a founder makes. It impacts your taxes, your ability to raise money, and your administrative workload. Two of the most common structures for incorporated businesses are the C corporation and the S corporation. What’s the difference, and which one is right for you?
TL;DR
C corporations are taxed at the corporate level, and shareholders are taxed again when they receive dividends—a system known as double taxation. S corporations are "pass-through" entities, meaning profits are taxed just once on the owners’ personal tax returns, but they come with strict ownership limits. If you plan to reinvest heavily and raise venture capital, the C corp is often the cleaner, more scalable choice. If you're a profitable, owner-operated business and want to distribute cash while paying yourself a reasonable salary, an S corp can significantly lower your tax bill.
Either way, Beancount.io is built to keep your books clean with plain-text, auditable entries and export-ready financials that make tax time a breeze.
Quick Comparison
Topic | C corporation | S corporation |
---|---|---|
How to create | File articles of incorporation with a state (this is the default status). | Incorporate first, then file IRS Form 2553 to elect S corp status. |
Taxation | Double taxation: Profits are taxed at the corporate level, then shareholders are taxed on dividends. | Pass-through: Income is taxed on the owners’ personal returns (no corporate income tax). |
Ownership rules | No limits on the number or type of shareholders; multiple classes of stock are allowed. | ≤100 shareholders, who must be U.S. persons only, and only one economic class of stock is permitted. |
Investor perception | VC-friendly, especially the Delaware C corp, which is the industry standard. | Less attractive to VCs due to pass-through taxation and stock class limitations. |
Best for | High-growth startups focused on reinvestment and raising external capital. | Owner-operators who want to pull cash from the business via a mix of payroll and distributions. |
Core IRS forms | 1120, 1120-W, 941, 1099-DIV (if paying dividends). | 1120-S, 1120-W (if applicable), 941, Schedule K-1 issued to each owner. |
Note: The federal corporate income tax is a flat 21%. However, state rules for both C corps and S corps vary widely. Always verify the tax treatment in your state of incorporation and operation.
What is a C Corporation?
A C corporation is the standard, default corporate structure in the United States. When you file articles of incorporation with a state, you create a C corp unless you elect otherwise. This structure provides limited liability protection for its owners (shareholders), requires formal governance (a board of directors, officers, bylaws), and creates a legal entity that investors and banks recognize and understand.
How C Corps Are Taxed
C corps have a distinct tax identity. They file their own corporate tax return, IRS Form 1120, and pay taxes on their net income at the corporate level. If the corporation then distributes its after-tax profits to shareholders in the form of dividends, those shareholders must report that dividend income on their personal tax returns and pay taxes on it again. This is the "double taxation" C corps are known for.
Why Choose a C Corp?
- Fundraising & Equity: This is the biggest draw for startups. C corps can issue multiple classes of stock (e.g., common and preferred), which is essential for venture capital deals. Structuring option pools, SAFEs, and convertible notes is straightforward.
- Reinvestment: If you plan to plow all your profits back into growing the business, you can avoid the second layer of tax by simply not paying dividends. The profits are taxed once at the corporate rate and remain in the company.
- Signaling: For better or worse, incorporating as a Delaware C corp signals to investors that you intend to build a venture-scale company.
Drawbacks of a C Corp
- Double Taxation: The primary disadvantage. If you plan to distribute profits regularly, you’ll pay tax twice on the same dollar.
- Administrative Burden: C corps come with more compliance requirements, including holding board meetings, maintaining corporate minutes, and handling more complex state and federal filings.
- Limited Deductions: Certain tax credits and deductions available to individuals or pass-through entities are not available at the corporate level.
What is an S Corporation?
An S corporation is not a different type of legal entity but rather a special tax election made with the IRS. A domestic corporation (or an LLC that elects to be taxed as a corporation) can file to become an S corp, which allows it to be treated as a pass-through entity for federal tax purposes.
Eligibility Snapshot
To qualify for and maintain S corp status, a company must meet strict criteria:
- Have no more than 100 shareholders.
- All shareholders must be U.S. individuals, certain trusts, or estates. No corporations, partnerships, or non-resident aliens can be shareholders.
- Have only one class of stock economically. (Differences in voting rights are allowed, but all shares must have the same rights to profits and assets).
- Not be an ineligible corporation, such as a bank or insurance company.
- You must file Form 2553 on time. For an existing business, this is generally by the 15th day of the third month of the tax year (March 15th for a calendar-year business).
Why Choose an S Corp?
- Single Layer of Tax: Profits and losses "pass through" the business directly to the owners' personal tax returns, reported via a Schedule K-1. The corporation itself does not pay federal income tax.
- Self-Employment Tax Savings: This is a key benefit. Owner-employees must pay themselves a "reasonable salary," which is subject to FICA taxes (Social Security and Medicare). However, any additional profits can be paid out as distributions, which are not subject to self-employment taxes.
Drawbacks of an S Corp
- Strict Rules: The ownership restrictions are rigid. Accidentally violating one (e.g., selling stock to an ineligible shareholder) can lead to an "inadvertent termination" of S corp status, which can have messy tax consequences.
- "Reasonable Compensation" Scrutiny: The IRS pays close attention to whether the salary paid to owner-employees is reasonable. Paying yourself an artificially low salary to maximize tax-free distributions is a major red flag for an audit.
- State Variability: Not all states recognize the S corp election. Some tax S corps as if they were C corps, or they may impose a separate entity-level tax, partially negating the federal tax benefit.
Which Should You Pick?
The decision boils down to your goals for ownership, funding, and cash flow.
Consider a C corp if you expect to:
- Seek institutional investment from venture capitalists.
- Create different classes of stock for founders and investors (e.g., preferred shares).
- Use complex equity instruments like SAFEs or convertible notes.
- Have non-U.S. owners, either now or in the near future.
- Reinvest profits for several years before taking significant cash out of the business.
Consider an S corp if you:
- Are 100% owned by U.S. individuals who meet the criteria.
- Are already profitable and want to distribute cash to owners efficiently.
- Can confidently run payroll and pay owner-operators a defensible, market-rate salary.
- Do not need complex equity classes for different types of owners.
If you’re unsure, many businesses start as a Delaware C corp to maintain maximum flexibility. You can evaluate making an S corp election later if your profitability and ownership structure make it advantageous.
Beancount.io: How Your Books Differ (with Examples)
Whether you choose a C or S corp, Beancount.io’s plain-text ledger makes the flow of money for taxes and equity explicit and auditable. Here are a few examples illustrating the key differences in your journal entries.
1) C Corp: Accruing and Paying Corporate Income Tax
A C corp is responsible for its own income tax. You'll accrue this liability and then pay it.
2025-03-31 * "Accrue federal corporate income tax for Q1"
Expenses:Taxes:Income 12500.00 USD
Liabilities:Taxes:Federal -12500.00 USD
2025-04-15 * "Pay Q1 2025 federal estimated tax"
Liabilities:Taxes:Federal 12500.00 USD
Assets:Bank:Checking -12500.00 USD
2) C Corp: Paying a Dividend vs. Retaining Earnings
When a C corp distributes profits, it's a dividend. This is a reduction of equity, not an expense.
2025-06-30 * "Board declares and pays cash dividend"
Equity:Dividends 50000.00 USD
Assets:Bank:Checking -50000.00 USD
If you retain the earnings instead, you simply don’t post this transaction. The profit stays in your Equity:RetainedEarnings
account.
3) S Corp: Reasonable Salary & Payroll Taxes
S corp owners must be paid a salary. This is a standard payroll expense, complete with employer-side taxes.
2025-01-31 * "Owner payroll (gross wages and employer taxes)"
Expenses:Payroll:Wages 8000.00 USD ; Gross salary
Expenses:Payroll:EmployerFICA 612.00 USD ; Employer portion of taxes
Liabilities:Payroll:Federal -2000.00 USD ; Withholding + FICA
Liabilities:Payroll:State -400.00 USD ; State withholding
Assets:Bank:Checking -6212.00 USD ; Net pay to owner
2025-02-15 * "Remit payroll taxes to agencies"
Liabilities:Payroll:Federal 2000.00 USD
Liabilities:Payroll:State 400.00 USD
Assets:Bank:Checking -2400.00 USD
4) S Corp: Owner Distribution
This is how profits beyond salary are paid out in an S corp. Notice it is not an expense. It's a direct draw from equity, similar to a dividend, but with different tax implications for the owner.
2025-03-15 * "Owner distribution (profit pass-through)"
Equity:Distributions:OwnerA 20000.00 USD
Assets:Bank:Checking -20000.00 USD
The owner receives a Schedule K-1 detailing their share of the company's profit and handles the tax on their personal return.
Chart-of-Accounts Tips
- Taxes:
- C corp: You'll need
Expenses:Taxes:Income
andLiabilities:Taxes:Federal
. - S corp: This income tax account is often unused at the federal level, but accounts for payroll taxes (
Expenses:Payroll:Taxes
andLiabilities:Payroll:*
) are essential.
- C corp: You'll need
- Equity:
- C corp: A standard setup includes
Equity:CommonStock
,Equity:AdditionalPaidInCapital
,Equity:RetainedEarnings
, andEquity:Dividends
. - S corp: Your chart will look similar but often uses
Equity:Distributions
instead of dividends. Some trackEquity:AAA
(Accumulated Adjustments Account) to manage distribution basis.
- C corp: A standard setup includes
- Payroll:
- Both structures will need robust
Expenses:Payroll:*
andLiabilities:Payroll:*
accounts if they have employees (including owner-employees).
- Both structures will need robust
Required IRS Forms (Common Cases)
- C corp: Form 1120 (Annual Income Tax Return), Form 1120-W (Estimated Tax), Form 941 (Quarterly Payroll), Form 940 (Annual Unemployment/FUTA), Form 1099-DIV (for each shareholder receiving dividends), W-2/W-3.
- S corp: Form 1120-S (Annual Income Tax Return), Schedule K-1 (for each shareholder), Form 941/940, W-2/W-3.
- States: Remember that separate state income, franchise, and payroll tax returns will likely apply to both.
FAQ Quick Hits
-
Can an LLC be an S corp? Yes. An LLC can file Form 8832 to elect to be taxed as a corporation, and then file Form 2553 to elect S corp status (assuming it meets all eligibility rules).
-
Is an S corp “always cheaper” for taxes? Not necessarily. The benefit depends entirely on your profit levels, the owner's reasonable salary, state tax laws, and the individual owner's tax bracket.
-
Can S corps have preferred stock? No, not in an economic sense. S corps can only have one class of stock. You can have different voting rights (e.g., voting and non-voting common stock), but all shares must have identical rights to distributions and liquidation assets.
-
Can I switch from one to the other later? Yes, but it can be complex. Converting from a C corp to an S corp is common, but you must be mindful of timing and potential built-in gains (BIG) tax rules. Converting from an S corp to a C corp is also possible and often required before a VC funding round.
How Beancount.io Helps
No matter which entity you choose, Beancount.io provides the clarity and control you need.
- Plain-text, version-controlled books that scale from a single-owner S corp to a venture-backed C corp.
- Clear payroll and equity workflows that make it easy to distinguish distributions from dividends, track stock option expenses, and manage retained earnings.
- Clean exports for your CPA, including a trial balance, income statement, and balance sheet, with a fully auditable trail for every number.
- Powerful automations for bank feeds and document capture, without ever sacrificing the transparency of a human-readable ledger.
Want a head start? Ask for our sample C-corp and S-corp Beancount charts of accounts and example journal bundle.
*Disclaimer: This guide is for informational purposes only and does not constitute legal or tax advice. Tax laws and entity regulations vary by state and are subject to change. You should consult with a qualified CPA or attorney before choosing or changing your business entity type.*