S-Corp vs C-Corp Taxes: Which Structure Saves You More Money?

Picking the wrong entity structure costs business owners real money. Not theoretical money. Not “it depends” money. We’re talking $20,000 to $50,000 per year in unnecessary taxes for a business earning $200,000 to $500,000 in profit.

Here’s what trips people up: both S-Corps and C-Corps are corporations under state law. You file the same articles of incorporation. The difference is purely a federal tax election. One checkbox on Form 2553 changes how the IRS treats every dollar your business earns.

This guide uses actual 2026 tax rates and real dollar calculations to show you exactly how S-Corp and C-Corp taxation differ. No vague “it depends” hand-waving. If you’re choosing a business entity structure or questioning whether your current setup still makes sense, the numbers here will give you a clear answer.

What’s the difference between an S-Corp and C-Corp?

S-Corps and C-Corps are both corporations, but they’re taxed differently. C-Corps pay a flat 21% federal tax on profits, then shareholders pay tax again on dividends at 0-23.8% (double taxation). S-Corps pay no corporate tax. Income passes through to owners at individual rates (10-37%) with a potential 20% QBI deduction under Section 199A, now permanent after OBBBA 2025. For a business earning $200,000, the difference can exceed $35,000 annually. Most small businesses benefit from S-Corp taxation, but C-Corps win for VC-backed startups seeking QSBS tax-free exit benefits up to $15 million.

Key Takeaways

• C-Corps face double taxation – 21% corporate tax plus 0-23.8% dividend tax means combined rates of 32.85-39.8% on distributed profits
• S-Corps pass income through once – Individual rates (10-37%) with no corporate-level tax, saving most owners $20,000-$50,000 annually
• QBI deduction is S-Corp exclusive – Up to 20% off qualified business income under Section 199A, now permanent under OBBBA 2025
• C-Corps unlock QSBS benefits – Up to $15M in tax-free capital gains under enhanced OBBBA 2025 rules (Section 1202)
• Self-employment tax savings favor S-Corps – Distributions above reasonable salary avoid the 15.3% payroll tax hit
• S-Corps have ownership restrictions – 100 shareholders max, US individuals only, one class of stock
• Converting between structures triggers tax consequences – Built-in gains tax, E&P tracking, and timing all matter

The Fundamental Difference: How Each Structure Is Taxed

The entire S-Corp vs C-Corp comparison comes down to one question: where does the tax bill land?

C-Corporation: Separate Tax Entity

A C-Corp is its own taxpayer. The corporation files Form 1120, calculates taxable income, and pays a flat 21% federal tax before shareholders see a dime.

When the corporation distributes remaining profits as dividends, shareholders pay tax again at qualified dividend rates (0%, 15%, or 20% depending on income). That’s double taxation: once at the corporate level, once at the shareholder level.

High-income shareholders also face the 3.8% Net Investment Income Tax on dividends, pushing the second layer even higher.

S-Corporation: Pass-Through Entity

An S-Corp files an informational return (Form 1120S) but pays zero federal income tax at the corporate level. All income, deductions, and credits pass through to shareholders via Schedule K-1.

Shareholders report their share on personal returns and pay at individual rates. One level of tax. That’s it.

This fundamental difference drives every other comparison between the two structures.

Complete Comparison Table: C-Corp vs S-Corp

Tax Rate Comparison: 2026 Numbers

Let’s put real numbers to the comparison. All figures below reflect 2026 inflation-adjusted brackets per IRS and Tax Foundation data.

C-Corporation Tax Rates (2026)

The federal corporate tax rate is 21% flat on all taxable income. A C-Corp earning $100,000 and one earning $10 million both pay the same 21% rate. This rate is permanent law under IRC Section 11(b), unchanged since TCJA 2017.

State corporate taxes vary significantly:

• 0%: Nevada, Wyoming, South Dakota, Washington (no corporate income tax)
• 4-6%: Most states
• 8-12%: California, New Jersey, Pennsylvania

Combined federal + state rates typically fall between 21% and 30%.

When profits are distributed as dividends, shareholders pay again at qualified dividend rates:

High earners also owe the 3.8% Net Investment Income Tax (NIIT) on dividends when AGI exceeds $200,000 single or $250,000 married. OBBBA 2025 did not change these thresholds, and they’re still not indexed for inflation.

S-Corporation Tax Rates (2026)

S-Corp income passes through and is taxed at individual rates. Here are the 2026 brackets:

The real kicker: S-Corp owners may also qualify for the QBI deduction, which knocks up to 20% off their qualified business income before applying these rates. That can drop an effective 24% bracket closer to 19%.

Run your own numbers with our S-Corp tax calculator.

Double Taxation Explained: The C-Corp Cost

Double taxation is the single biggest reason small businesses avoid C-Corp status. Here’s exactly how the math works on $200,000 in profit, fully distributed.

C-Corp: $200,000 profit, all distributed as dividends

For shareholders in the 20% + 3.8% NIIT bracket, the combined rate climbs to roughly 39.8%.

When Double Taxation Doesn’t Matter

Double taxation only hits distributed profits. If your C-Corp retains all earnings and reinvests them, there’s no second layer of tax yet.

This is why C-Corp structure works for:

• Growth companies reinvesting every dollar back into the business
• Startups building toward a QSBS-eligible exit (more on that below)
• Businesses with patient owners who don’t need current distributions

The trap we see in practice: founders who form a C-Corp “for the future” but actually need $150,000 in distributions this year. They end up paying double taxation on money they needed today while the QSBS benefit they were targeting is five years away.

S-Corp Advantages: Why Most Small Businesses Choose Pass-Through

For business owners who take regular distributions from their company, S-Corp taxation wins in three specific ways.

Single Level of Tax

Same $200,000 profit scenario, structured as an S-Corp with the owner filing married jointly:

That $35,700 difference isn’t a rounding error. It’s a new employee, a marketing budget, or two years of S-Corp tax services.

QBI Deduction (Section 199A)

The QBI deduction lets S-Corp owners deduct up to 20% of qualified business income from their personal tax return. C-Corps don’t qualify. Period.

OBBBA 2025 made this deduction permanent (it was scheduled to expire after 2025) and expanded the phase-in range for specified service businesses. For 2026, the key thresholds:

• Phase-out begins: ~$203,000 (single) / ~$406,000 (married filing jointly)
• Phase-in range: $75,000 / $150,000 (expanded from $50,000/$100,000 under OBBBA)
• Full phase-out for SSTBs: ~$278,000 / ~$556,000

For a business owner in the 32% bracket, the QBI deduction effectively reduces their rate on qualified income to about 25.6%. For strategies to maximize your QBI deduction as an S-Corp, proper planning around the phase-out thresholds is critical.

Self-Employment Tax Savings

S-Corps offer a legitimate way to reduce payroll taxes through the reasonable salary strategy.

The concept is straightforward: S-Corp owner-employees pay themselves a reasonable salary (subject to payroll taxes at 15.3%), then take remaining profits as distributions (not subject to self-employment tax).

Example: $200,000 S-Corp profit

• Reasonable salary: $80,000 (subject to payroll taxes)
• Distribution: $120,000 (no self-employment tax)
• Savings: $120,000 x 15.3% = $18,360 in avoided payroll tax

This has to be done right. The IRS scrutinizes unreasonably low salaries, and getting audited over a $50,000 salary on a $300,000 business isn’t worth the extra few thousand in tax savings. Our guide on determining S-Corp reasonable compensation covers what the IRS actually looks at.

Loss Pass-Through

S-Corp losses flow through to shareholders and can offset other personal income (subject to basis, at-risk, and passive activity limitations).

C-Corp losses stay trapped inside the corporation. They can only offset future C-Corp profits. If you have a bad year and need those losses on your personal return, the C-Corp gives you nothing.

C-Corp Advantages: When Corporate Structure Wins

Despite double taxation, C-Corps are the right answer in four specific situations.

Venture Capital and Outside Investment

VCs and institutional investors strongly prefer C-Corp structure. Most require it. Here’s why:

• Clean equity rounds with multiple share classes (preferred, common, options)
• No K-1 headaches for investors who don’t want pass-through income they didn’t receive in cash
• Standardized Delaware C-Corp governance that every VC lawyer knows
• QSBS eligibility (only available for C-Corp stock)
• Easier exit path for acquirers and IPO underwriters

If you’re raising institutional capital, you’ll be a Delaware C-Corp. There’s no realistic alternative.

QSBS Tax Exclusion (Section 1202): Updated for OBBBA 2025

Qualified Small Business Stock (QSBS) is one of the most powerful tax benefits in the code. It’s exclusively available for C-Corp stock.

OBBBA 2025 enhanced the rules significantly. The benefits now depend on when stock was issued:

Stock issued BEFORE July 4, 2025 (grandfathered):

Stock issued AFTER July 4, 2025 (new OBBBA rules):

A founder selling $15 million in qualifying QSBS could save over $3.5 million in federal taxes compared to standard capital gains treatment. S-Corps can’t access this benefit at all.

Reinvestment Strategy

If you’re reinvesting all profits with no plans to distribute cash to owners:

• The 21% corporate rate may be lower than your personal rate (anyone above the 24% bracket)
• No double taxation applies if no dividends are paid
• You build entity value for an eventual sale (potentially QSBS-eligible)

This works for growth-stage companies. It falls apart the moment owners start needing distributions, which is why we see founders who chose C-Corp “for QSBS” end up regretting it two years later when they need cash.

Fringe Benefit Advantages

C-Corps can deduct certain fringe benefits that aren’t fully deductible for S-Corp shareholders who own more than 2%:

Foreign Shareholders and Unlimited Ownership

S-Corps cannot have foreign shareholders. Even one non-resident alien shareholder terminates the S election automatically.

S-Corps are also limited to 100 shareholders (family members can elect single-shareholder treatment), can only have US individuals and certain trusts as owners, and must stick to one class of stock.

C-Corps face none of these restrictions. Unlimited shareholders, any person or entity, multiple stock classes, any fiscal year-end.

Break-Even Analysis: At What Income Does C-Corp Win?

This is the question every business owner actually wants answered. There’s no single number because it depends on distribution needs, but here are the general breakpoints:

Below ~$400K taxable income (MFJ): S-Corp wins almost every time. The QBI deduction alone saves 4-5% on the effective rate, and self-employment tax savings add another $10,000-$18,000. C-Corp double taxation can’t compete.

$400K-$800K range: The answer depends on how much you’re distributing. If you’re retaining 60%+ of profits in the business, the 21% C-Corp rate starts looking attractive compared to the 32-35% personal rate. But if you need most of that cash out, S-Corp still wins.

Above $800K with reinvestment: C-Corp can win if you’re retaining all or most earnings at 21% and building toward QSBS. The 37% personal rate on S-Corp income (even with QBI) exceeds the 21% corporate rate by a wide margin when you’re not distributing.

The QSBS wildcard: If you’re building toward an exit above $1M and can meet the Section 1202 requirements, C-Corp wins regardless of current income level. The potential $3.5M+ in tax-free gains on exit dwarfs any annual savings from S-Corp taxation.

The factor most people overlook: state taxes shift everything. In California, S-Corps pay a 1.5% entity-level franchise tax. In Texas, there’s no personal income tax but there’s a franchise tax. These state-level differences can swing the break-even point by $50,000 or more.

The bottom line: Most small businesses under $5M in revenue where owners need regular distributions should be S-Corps. The exceptions are real, but they’re exceptions.

Making the Decision: Which Is Right for You?

Decision Framework

Answer these questions in order. The first “yes” usually decides it:

1. Are you raising VC or institutional capital? Yes = C-Corp required
2. Do you have or plan foreign shareholders? Yes = C-Corp required
3. Do you need more than 100 shareholders or multiple stock classes? Yes = C-Corp required
4. Is your exit strategy built around QSBS (selling for $1M+)? Yes = C-Corp advantage
5. Do you need regular distributions from the business? Yes = S-Corp advantage
6. Is your taxable income under $400K? Yes = S-Corp almost certainly wins

If you answered “no” to questions 1-4 and “yes” to questions 5-6, you’re an S-Corp candidate. That describes the majority of small business owners.

Real-World Scenarios

Scenario 1: Professional Services Firm, $300K Profit, Owner Needs $200K

Best choice: S-Corp

• Owner takes $120,000 reasonable salary (payroll tax applies)
• $180,000 passes through as S-Corp distribution
• QBI deduction saves approximately $10,800
• Self-employment tax saved: ~$9,200 versus sole proprietorship
• Annual savings vs C-Corp: approximately $25,000

Scenario 2: Tech Startup, Series A Raised, Reinvesting All Profits

Best choice: C-Corp

• VCs require C-Corp structure for clean preferred stock rounds
• QSBS clock starts at incorporation
• No distributions means no double taxation currently
• Building toward $15M+ tax-free exit under QSBS
• Potential future savings: $3.5M+ in capital gains tax avoided

Scenario 3: E-Commerce Business, $150K Profit, Two US Partners

Best choice: S-Corp

• Pass-through taxation avoids double taxation entirely
• Both partners benefit from QBI deduction
• Distributions taken as needed without second tax layer
• No institutional capital needed
• Simpler structure, lower annual tax burden

Scenario 4: Manufacturing Company, $2M Profit, Foreign Investor Among 5 Partners

Best choice: C-Corp

• Foreign investor disqualifies S-Corp election outright
• 21% flat rate on retained earnings (reinvesting heavily)
• Can structure dividend timing strategically
• May qualify for QSBS on eventual sale
• Only viable corporate structure given ownership

Converting Between C-Corp and S-Corp

Already in the wrong structure? Conversion is possible, but the tax consequences depend on which direction you’re going.

S-Corp to C-Corp

Converting from S-Corp to C-Corp is relatively straightforward. Revoke the S election by filing a statement with the IRS. The main considerations:

• Generally minimal immediate tax consequences
• QSBS holding period clock starts fresh with the conversion date
• Time it around your fiscal year-end for cleaner accounting

This conversion makes sense before a VC funding round, when you want to start the QSBS clock, or when adding foreign shareholders.

C-Corp to S-Corp

Going the other direction is more complex. File Form 2553 to elect S-Corp status, but be prepared for:

Built-in Gains (BIG) Tax: If your C-Corp owns appreciated assets at conversion, the S-Corp owes a 21% tax on gains recognized from those assets within the first 5 years. This is the biggest gotcha in C-to-S conversions.

Earnings & Profits (E&P): Accumulated E&P from the C-Corp years carries forward. Distributions from this E&P layer get taxed as dividends, not as tax-free return of basis. You’ll need careful tracking of the Accumulated Adjustments Account (AAA), which starts at zero upon conversion.

Timing matters. Convert early when the company has fewer appreciated assets and less accumulated E&P. The best time is often the first day of the tax year.

For a full walkthrough of conversion planning, see our guides on C-Corp to S-Corp conversion and converting an LLC to S-Corp.

Frequently Asked Questions

Is C-Corp or S-Corp better for taxes?

S-Corp results in lower taxes for most small businesses where owners need regular distributions. The combination of pass-through taxation, QBI deduction (up to 20%), and self-employment tax savings typically saves $20,000-$50,000 annually. C-Corp is better when raising VC funding, planning for QSBS exit benefits, or when you can’t meet S-Corp eligibility requirements.

What is double taxation in a C-Corp?

Double taxation means C-Corp profits get taxed twice: first at the 21% corporate rate, then again at 0-23.8% when distributed as dividends to shareholders. On $200,000 in distributed profit, double taxation costs $65,700 (combined 32.85% rate) versus roughly $30,000 for the same income through an S-Corp.

Can I switch from C-Corp to S-Corp?

Yes, by filing Form 2553 with the IRS. The conversion triggers potential built-in gains tax (21% on appreciated assets sold within 5 years) and requires tracking accumulated E&P from C-Corp years. Earlier conversion is generally easier because there are fewer appreciated assets and less E&P to manage.

Why do startups choose C-Corp?

Startups choose C-Corp for two reasons: venture capital compatibility (VCs require C-Corp for clean equity rounds with preferred stock) and QSBS benefits under Section 1202 (up to $15 million in tax-free capital gains under OBBBA 2025 rules). S-Corps can’t offer either.

Do C-Corps get the QBI deduction?

No. The Section 199A Qualified Business Income deduction is exclusively for pass-through entities: S-Corps, partnerships, and sole proprietorships. OBBBA 2025 made the QBI deduction permanent, which strengthened the S-Corp advantage for owners under the income phase-out thresholds.

Can an S-Corp have foreign shareholders?

No. S-Corps can only have shareholders who are US citizens, resident aliens, or certain domestic trusts and estates. A single non-resident alien shareholder terminates the S election automatically. If you have or anticipate international investors, C-Corp is your only corporate option.

Which is better for self-employment tax?

S-Corp, when structured properly. S-Corp shareholders who work in the business pay themselves a reasonable salary (subject to payroll taxes), then take remaining profits as distributions that avoid the 15.3% self-employment tax. On a $200,000 business with $80,000 salary, that’s $18,360 saved annually on the distribution portion.

What’s the QSBS benefit for C-Corps?

Qualified Small Business Stock under Section 1202 lets shareholders exclude up to 100% of capital gains on C-Corp stock held for 5+ years (or 50-75% for shorter holding periods under OBBBA 2025 tiered rules). The maximum exclusion is $15 million or 10x your cost basis, whichever is greater. Only C-Corp stock qualifies.

The Bottom Line

S-Corp vs C-Corp isn’t about which structure is “better.” It’s about which one fits your situation.

S-Corp wins when you’re taking distributions, want the QBI deduction, benefit from self-employment tax savings, and don’t need the investor compatibility or QSBS benefits of a C-Corp. That covers the majority of small business owners with revenue under $5 million.

C-Corp wins when you’re raising institutional capital, building toward a QSBS-eligible exit, reinvesting all profits at a 21% rate that beats your personal bracket, or have ownership structures that disqualify S-Corp status.

The wrong choice costs tens of thousands every year. The right choice, made with your actual numbers in front of you, saves the same.

Entity selection decisions deserve more than a comparison table on the internet. If you’re evaluating S-Corp vs C-Corp for your business, considering a conversion, or want to model both structures with your actual revenue and distribution needs, schedule a consultation with our team to run the numbers for your specific situation.