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:

• 12.4% for Social Security (up to $176,100 in 2025) and 

• 2.9% for Medicare on all earnings, 

• plus 0.9% additional Medicare tax above $200,000. This happens before calculating income tax.

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:

• Self-employment tax: $22,950 (15.3% on full $150,000)

• Income tax: ~$36,000 (24% bracket estimate)

• Total tax: ~$58,950

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

• Payroll tax on salary: $13,770 (15.3% on $90,000)

• Income tax on full $150,000: ~$36,000 (same)

• Self-employment tax on distribution: $0

• Tax savings: $9,180

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

• Payroll processing: $1,200-1,800/year

• S-Corp tax return (Form 1120S): $800-2,500/year

• Additional administrative time

• Net savings: $5,000-7,000/year

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):

• Entry-level/recently licensed: $65,000-85,000

• Mid-career licensed architect: $85,000-135,000

• Senior principal, specialized practice: $120,000-180,000

• Varies by market: San Francisco +30%, Nashville -15% from national median

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

• Distributions exceed salary by more than 2:1

• Compensation falls significantly below industry norms

• Professional service businesses show suspiciously round numbers ($30,000 exactly)

• High profitability with inexplicably low shareholder wages

Penalties when caught:

• 15.3% on reclassified distributions (the tax you tried to avoid)

• 20% accuracy-related penalty on underpayment

• Interest from original due dates

• Professional fees for audit defense

• Total damage: Often $25,000+ per year examined

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