# Rental Property Depreciation: How STR Investors Reduce Taxes Legally

> Depreciation is the largest tax deduction available to rental property owners. Learn how it works for short-term rentals, the 27.5-year schedule, cost segregation, and how bonus depreciation accelerates your write-offs.

Canonical: https://www.underwriteapp.com/learn/rental-property-depreciation


## What Is Rental Property Depreciation?

**Depreciation** is a non-cash tax deduction that allows you to write off the cost of your rental property over time, reflecting its theoretical wear and tear. For residential rental properties — including short-term rentals — the IRS allows you to depreciate the building structure over **27.5 years** using the straight-line method.

$$\text{Annual Depreciation} = \frac{\text{Depreciable Basis}}{27.5}$$

This is a paper loss. You're not spending money, but you're reducing your taxable rental income. For most STR investors, depreciation is the single largest tax deduction and often the difference between owing taxes on rental income and paying nothing.

## How to Calculate Your Depreciable Basis

You can only depreciate the building — not the land. Here's how to determine your depreciable basis:

### Step 1 — Determine the building's cost

Start with your purchase price plus any capitalized closing costs (title insurance, attorney fees, recording fees). Exclude the cost of land.

**Example:** $400,000 purchase price. Tax assessment shows 80% building / 20% land. Depreciable basis = $400,000 × 80% = **$320,000**.

### Step 2 — Calculate annual straight-line depreciation

$320,000 ÷ 27.5 = **$11,636 per year**

This $11,636 deduction reduces your taxable rental income every year for 27.5 years — even though you haven't spent a dime beyond the original purchase.

### Step 3 — Add depreciable personal property

Furnishings, appliances, linens, electronics, and outdoor equipment in your STR are depreciable assets with **shorter lives**:

| Asset Category | Recovery Period | Examples |
|---------------|----------------|----------|
| 5-year property | 5 years | Appliances, furniture, area rugs, electronics, linens, kitchen equipment |
| 7-year property | 7 years | Office furniture, certain fixtures |
| 15-year property | 15 years | Land improvements (fences, driveways, landscaping, patios) |
| 27.5-year property | 27.5 years | Building structure, roof, HVAC, plumbing, electrical |

A fully furnished STR typically has $15,000–$40,000 in 5-year personal property. At straight-line, that's $3,000–$8,000 per year in additional depreciation.

## Cost Segregation: Accelerating Depreciation

A **cost segregation study** is an engineering analysis that reclassifies components of your building from 27.5-year property into shorter-lived categories. Items that are normally lumped into the building structure — like decorative fixtures, specialized flooring, certain plumbing, and electrical components — get reclassified as 5-, 7-, or 15-year property.

### What gets reclassified

A typical cost segregation study on a $400,000 residential STR might reclassify:

| Component | Reclassified Amount | New Recovery Period |
|-----------|-------------------|-------------------|
| Decorative lighting, specialty fixtures | $15,000 | 5 years |
| Cabinetry, countertops, tile work | $25,000 | 5–7 years |
| Landscaping, patios, walkways | $20,000 | 15 years |
| Electrical components (dedicated circuits) | $10,000 | 5 years |
| **Total reclassified** | **$70,000** | |

Instead of depreciating that $70,000 over 27.5 years ($2,545/year), you depreciate it over 5–15 years ($4,667–$14,000/year) — or write it all off in year one with bonus depreciation.

### Bonus depreciation

Under the Tax Cuts and Jobs Act, qualifying assets can be deducted 100% in the year they're placed in service (through 2026, phasing down 20% per year after). When combined with cost segregation:

**Example:** $70,000 reclassified × 100% bonus depreciation = **$70,000 first-year deduction**

That's on top of your regular $11,636 building depreciation and $6,000+ in furnishing depreciation. Total first-year depreciation on a $400,000 STR could exceed **$85,000** — enough to offset substantial income from other sources.

### Is cost segregation worth the cost?

| Property Value | Study Cost | Typical First-Year Benefit | Payback |
|---------------|------------|--------------------------|---------|
| Under $200,000 | $3,000–$5,000 | $15,000–$30,000 deduction | Marginal |
| $300,000–$500,000 | $5,000–$8,000 | $50,000–$100,000 deduction | Strong |
| $500,000+ | $6,000–$10,000 | $100,000–$200,000+ deduction | Very strong |

At a 32% marginal tax rate, a $100,000 deduction saves $32,000 in taxes — making the $6,000 study cost a 5x return.

## The STR Tax Loophole: Material Participation

For most rental property, depreciation losses are **passive** — they can only offset other passive income. But short-term rentals have a unique advantage.

Under IRS rules, a rental activity with an average guest stay of **7 days or less** is not automatically classified as a passive activity. If you **materially participate** in the STR operation (spending 100+ hours and more than anyone else), the depreciation losses become **non-passive** and can offset your W-2 income, business income, or any other active income.

This is why many high-income professionals invest in STRs specifically: the combination of cost segregation + bonus depreciation + material participation can generate **six-figure paper losses** that offset active income in year one.

### Material participation requirements

You must meet at least one of the seven IRS material participation tests. The most commonly used for STR investors:

- **500-hour test**: You participate in the STR activity for 500+ hours during the year
- **Substantially all test**: Your participation constitutes substantially all participation by any individual
- **100-hour / more-than-anyone test**: You participate 100+ hours and more than any other individual (including a property manager)

Using a property manager doesn't disqualify you, but you must still demonstrate your own participation exceeds theirs. Track your hours meticulously — guest communication, pricing adjustments, maintenance coordination, financial management, and market research all count.

## Depreciation Recapture: The Trade-Off

Depreciation isn't free money — it's deferred taxes. When you sell, the IRS recaptures all depreciation you've taken at a **25% rate** (higher than the standard capital gains rate).

**Example:** $320,000 depreciable basis. After 10 years of $11,636/year straight-line depreciation, you've claimed $116,360. At sale, you owe:

- Depreciation recapture: $116,360 × 25% = **$29,090**
- Plus capital gains tax on any appreciation

You can defer depreciation recapture by executing a [1031-exchange](/learn/1031-exchange). Or, if held until death, your heirs receive a stepped-up basis that eliminates the recapture entirely.

## How Depreciation Affects Your Investment Returns

Depreciation doesn't change your actual cash flow, but it significantly impacts after-tax returns:

- **[cash-on-cash-return](/learn/cash-on-cash-return)**: Depreciation reduces taxable income, so your after-tax CoC is higher than your pre-tax CoC. A 10% pre-tax CoC might be 10% after-tax once depreciation shields the income.
- **[internal-rate-of-return](/learn/internal-rate-of-return)**: After-tax IRR should account for depreciation benefits during the hold period and recapture at sale. The net effect is almost always positive — the time value of deferred taxes works in your favor.
- **[net-operating-income](/learn/net-operating-income)**: Depreciation does not affect NOI (it's a non-cash, below-the-line item). Don't include it in your NOI calculation.

When underwriting an STR investment, model both pre-tax and after-tax returns. The depreciation benefit often adds 2–4 percentage points to your after-tax IRR over a 5–10 year hold.