When Should Architecture Firms Elect S-Corp Status?

After preparing tax returns and advising over 150 S corporations (many of them architecture and professional service firms) the pattern is clear: the firms that benefit most from S-Corp election are those earning $100,000-300,000 with simple structures in tax-friendly states. The firms that regret the election are those who implemented it based on headline tax savings without calculating reasonable compensation requirements, state tax clawbacks, or whether their existing W-2 income eliminates the primary benefit

The S-Corp election benefit comes from splitting business income into two categories with different tax treatment. As a sole proprietor or default LLC, you pay 15.3% self-employment tax on every dollar of net business income:

An S-Corp changes this by paying you W-2 salary subject to full 15.3% payroll tax, then distributing remaining profit as distributions that avoid payroll tax entirely while still being taxed as ordinary income.

The distributions aren't tax-free—they're just exempt from the 15.3% FICA specifically.

Example: $150,000 net income

As Sole Proprietor:

As S-Corp ($90K salary / $60K distribution):

But you're not pocketing $9,180 because of compliance costs:

The break-even point sits around $60,000-80,000 in net income. Below this, administrative overhead consumes the tax benefit. Above $100,000, savings accelerate enough to clearly justify the complexity.

S-Corp Requirements for Architecture Firms: The Reasonable Compensation Trap

The IRS requires shareholder-employees to pay themselves fair market value for services actually performed before taking distributions. You cannot pay yourself $30,000 salary while taking $120,000 in distributions when you're personally performing billable design work the firm bills at $150-200/hour.

Reasonable compensation ranges for architects (2025):

The IRS audits S-Corps with disproportionate ratios and has detailed wage data by occupation and metro area. They flag situations where:

Penalties when caught:

The IRS typically examines three years simultaneously in employment tax audits, which means $75,000+ total exposure before unwinding the S-Corp structure.

When S-Corp Doesn't Work: The W-2 Income Problem

S-Corp election backfires when you're already earning W-2 wages approaching or exceeding the Social Security wage base ($176,100 for 2025). Once you've maxed out Social Security tax at your day job, additional self-employment income only faces 2.9-3.8% Medicare tax, not the full 15.3%.

The trap: As an S-Corp shareholder-employee, you must pay employer-side payroll taxes including 6.2% employer Social Security on your reasonable compensation; new money that didn't exist under sole proprietor taxation.

Example: $147,000 W-2 job + $80,000 side practice

As sole proprietor:

As S-Corp (with $50,000 reasonable salary):

You need side practice income exceeding $200,000-300,000 annually to overcome this disadvantage. At that point you're running a full architecture firm, not a side practice.

State Tax Rules That Eliminate S-Corp Benefits

Federal self-employment tax savings disappear when state tax structures impose S-Corp-specific penalties.

States where S-Corp benefits are significantly reduced:

State

S-Corp Tax

Impact on $150K Income

California

1.5% franchise tax + $800 minimum

-$2,250 annual

New York City

8.85% corporate rate (doesn't recognize S-Corp)

Eliminates most benefit

Tennessee

6.5% on distributions

Claws back partial federal savings

Texas

Franchise tax on gross receipts >$1M

Applies regardless of entity

State Tax Rules That Eliminate S-Corp Benefits

Federal self-employment tax savings disappear when state tax structures impose S-Corp-specific penalties.

States where S-Corp benefits are significantly reduced:

State

S-Corp Tax

Impact on $150K Income

California

1.5% franchise tax + $800 minimum

-$2,250 annual

New York City

8.85% corporate rate (doesn't recognize S-Corp)

Eliminates most benefit

Tennessee

6.5% on distributions

Claws back partial federal savings

Texas

Franchise tax on gross receipts >$1M

Applies regardless of entity

California example:

Additional state complications:

For California and New York City firms, S-Corp may still justify election above $150,000 income, but benefits are substantially smaller than federal-only analysis suggests.

The QBI Deduction Impact on S-Corp Savings

Section 199A qualified business income deduction (20% of business income) works differently for S-Corps versus sole proprietors, reducing net tax benefit substantially.

Sole proprietor: 20% deduction on entire $150,000 net income

S-Corp: 20% deduction only on distribution portion

This reduction comes directly off your S-Corp net savings. Combined with state taxes and compliance costs, actual benefit for $150,000 income runs $1,500-3,000 annually—meaningful but nowhere near the $9,000 headline number.

Note: QBI phases out above $191,950 (single) or $383,900 (married filing jointly) for "specified service trades or businesses" including architecture. High-income architects face additional complexity in this calculation.

S-Corp vs Partnership for Multi-Owner Architecture Firms

S-Corps require single class of stock, meaning all shareholders receive distributions proportional to ownership percentage. You cannot allocate profits based on formulas considering client origination, project management, or performance metrics.

Partnership allocation flexibility:

S-Corp restriction:

Workaround: Multi-entity structure where each partner has individual S-Corp contracting with partnership entity

For architecture firms with sophisticated profit-sharing formulas or unequal contribution models, partnership taxation typically makes more sense despite slightly higher self-employment tax on guaranteed payments.

S-Corp Election Timeline and Commitment Requirements

Filing deadlines for 2026 tax year:

Critical limitation: Five-year lock-in

Once elected, revoking S-Corp status creates five-year waiting period before re-election without IRS permission. You cannot:

This requires commitment that the structure makes sense for medium term (5+ years), not just current year tax optimization.

Ongoing compliance requirements:

Missing deadlines or failing to maintain corporate formalities can invalidate S-Corp election, triggering back taxes and penalties for all years treated as S-Corp.

When Architecture Firms Should Elect S-Corp Status: The Decision Framework

Green light scenarios (S-Corp likely makes sense):

✓ Net income consistently $100,000-300,000+ annually

✓ Solo practitioner or two equal partners with simple arrangement

✓ No significant W-2 income from other employment

✓ Operating in tax-friendly state (Texas, Florida, most states without S-Corp specific taxes)

✓ Can justify reasonable compensation $75,000-135,000 for your market/role

✓ Leaving $40,000+ for distributions after reasonable salary

✓ Comfortable with payroll obligations and corporate formalities

✓ Planning stable structure for 5+ years

✓ Expected annual savings: $5,000-15,000 after all costs

Yellow light scenarios (requires detailed analysis):

⚠ Net income $80,000-100,000 (marginal benefit)

⚠ California, New York, Tennessee operations (state taxes reduce benefit)

⚠ Moderate W-2 income from other job ($50,000-100,000)

⚠ Partnership with straightforward equal splits

⚠ Variable income year-to-year but trending upward

⚠ Growth phase with plan to add staff

⚠ Potential savings: $2,000-5,000 annually, worth analyzing closely

Red light scenarios (S-Corp likely doesn't work):

✗ Net income below $60,000-80,000

✗ W-2 income exceeding $176,100 Social Security wage base

✗ New York City operations

✗ Three or more partners with complex allocation formulas

✗ Startup phase with unpredictable income

✗ Plans to bring in outside investors or preferred equity

✗ Can't justify reasonable compensation leaving meaningful distributions

✗ Don't want payroll administrative burden

✗ Result: Compliance costs exceed benefits, or election creates new taxes

Sunbridge AdvisoryYour dedicated finance and tax team

DISCLAIMER OF TAX ADVICE: Any discussion contained herein cannot be considered to be tax advice. Actual tax advice would require a detailed and careful analysis of the facts and applicable law, which we expect would be time consuming and costly. We have not made and have not been asked to make that type of analysis in connection with any advice given in this e-mail/newsletter. As a result, we are required to advise you that any Federal tax advice rendered in this e-mail is not intended or written to be used and cannot be used for the purpose of avoiding penalties that may be imposed by the IRS. In the event you would like us to perform the type of analysis that is necessary for us to provide an opinion, that does not require the above disclaimer, as always, please feel free to contact us