Ask the Tax Editor, June 5: Tax Rules for Landlords

Why It Matters

Understanding these rules helps landlords avoid unexpected tax bills and optimize estate and sale strategies, directly affecting cash flow and investment returns.

Key Takeaways

• Rental sales trigger 25% depreciation recapture tax.
• Inherited rentals receive step‑up basis at fair market value.
• Net investment income tax applies above $200k/$250k AGI thresholds.
• Mixed‑use home basis equals cost plus improvements minus depreciation.
• Only residence portion of duplex qualifies for $500k exclusion.

Pulse Analysis

Landlords often assume that owning a property for decades automatically grants the home‑sale exclusion, but the IRS draws a hard line between personal use and rental activity. When a rental is sold, any depreciation claimed over the years is "recaptured" and taxed at a flat 25% rate, separate from the standard long‑term capital‑gain brackets of 0%, 15% or 20%. This recapture can significantly erode profit, especially for high‑value assets, making it essential for investors to factor it into their exit calculations.

Estate planning for rental owners also hinges on the step‑up in basis rule. Upon the owner's death, the heir inherits the property at its current fair‑market value, effectively resetting the tax basis and eliminating accumulated depreciation. This provision can transform a potentially taxable gain into a tax‑free transfer, but it also means the new owner must start a fresh depreciation schedule over the property's remaining recovery period. Advisors recommend reviewing ownership structures and beneficiary designations well before a transfer to capture the full benefit.

Finally, the 3.8% net investment income tax (NIIT) adds another layer of complexity for high‑income landlords. The tax applies to the lesser of net investment income or the amount by which modified AGI exceeds $200,000 for singles and $250,000 for married couples, and it is not indexed for inflation. Consequently, many landlords who thought only capital gains were at stake now face an additional levy on rental income, dividends, and other passive earnings. Proper tax planning—such as timing sales, managing AGI, or leveraging deductions—can mitigate the NIIT impact and preserve after‑tax returns.