Understanding the OBBBA Changes

Many high-earning individuals focus on mortgage rates when buying a house. However, few realize that tax law timing can have a six-figure impact on their real after-tax cost of ownership.

The One Big Beautiful Bill Act (OBBBA), effective July 2025, introduced several key adjustments affecting homeowners and real estate investors. Consequently, understanding how these new provisions interact with income, property value, and filing status is critical for effective planning.

Key Changes

Scenario: High-Income California Buyer

Profile:

• Annual Income (W-2 + bonus): $500,000
• Filing Status: Married Filing Jointly
• Home Purchase: $2,000,000 primary residence in Los Angeles
• Down Payment: $500,000
• Mortgage: $1,500,000 at 6% interest
• Annual Property Tax: 1.2% of value = $24,000
• State Income Tax (CA): ~9.3% marginal = $46,500
• Other Itemized Deductions (charity, etc.): $5,000

Before OBBBA (Old Rules)

1. SALT Deduction Cap

• Combined CA income tax ($46,500) + property tax ($24,000) = $70,500
• SALT deduction capped at $10,000
• Result: $60,500 in lost deduction potential

2. Mortgage Interest Deduction

• Interest on first $750,000 of mortgage debt deductible
• Mortgage = $1,500,000 → 50% of interest deductible
• Annual interest = $90,000 × 50% = $45,000 deductible

3. Total Itemized Deductions

Effective Federal Tax Benefit:
$60,000 × 37% = $22,200 reduction in federal tax liability

After OBBBA (New Rules)

1. SALT Deduction Cap Raised

• New cap = $40,000, phased out for AGI > $500K
• In this case, assume partial phase-out allows $30,000 deduction

2. Mortgage Interest Deduction

• Rule unchanged ($750K limit), but made permanent
• Still $45,000 deductible

3. Total Itemized Deductions

Effective Federal Tax Benefit:
$80,000 × 37% = $29,600 reduction in federal tax liability

Net Difference

Over a 10-year mortgage horizon, that’s roughly $74,000 in additional tax savings purely from timing and deduction differences.

Strategic Takeaways

1. Buying after OBBBA is not automatically better — it depends on income, state, and timing.
   For AGI over $500K, the SALT cap benefit begins to phase out.
   For those below, the new $40K limit offers substantial relief.
2. Property-tax prepayment and mortgage structuring are now bigger levers than interest rates.
3. For mixed-use properties, entity-level PTE elections can bypass individual SALT limits.
4. Accelerate qualifying energy improvements before 2025 year-end to maximize remaining credits.
5. Maintain digital documentation of all property-related payments and lender reports to prevent audit exposure.

Conclusion

For high-earning individuals, real estate isn’t just an investment — it’s a strategic tax tool.
The One Big Beautiful Bill Act widened opportunities for deduction recovery, especially through the expanded SALT cap and clarified entity rules, while also tightening compliance.

In practice:
A $2 million home in California now produces roughly $7,400 more in annual federal tax savings under the new law.
Combined with proper income and entity planning, this can result in over $70,000 in additional long-term savings.

At Flex Tax & Consulting Group, we help clients structure real estate purchases and ownership plans to align with the latest tax legislation — ensuring every major financial decision maximizes after-tax results.

Don’t just buy a home. Structure it — the right way, the first time.

The post Buying a Home Before vs. After OBBBA: How the Rules Change for High-Income Individuals appeared first on Flex Tax and Consulting Group (FTCG).