Understanding Depreciation

Depreciation is the single largest non-cash tax deduction available to real estate investors. It lets you deduct the cost of your property over time — even while the property is appreciating in value. Understanding how it works (and how to maximize it) can save you tens of thousands of dollars per year.

This guide explains the mechanics in plain language. No accounting degree required.

What Is Depreciation?

The IRS considers buildings to be assets that wear out over time — just like a piece of equipment. Even though your property might be worth more than when you bought it, the IRS lets you deduct a portion of the building’s cost each year as a “loss.”

This deduction reduces your taxable rental income. In many cases, depreciation alone can turn a cash-flow-positive property into a tax loss — meaning you owe zero taxes on the rental income and may even have losses to carry forward.

Key concept: You can only depreciate the building, not the land. When you buy a property for $400,000, some of that is the land and some is the structure. Only the structure portion is depreciable.

How RealBooks Handles It

When you add a property to RealBooks with a purchase price and date, the platform automatically sets up depreciation tracking. You’ll need to specify the land value (or let RealBooks estimate it based on your property type and location) so only the building portion is depreciated.

Straight-Line Depreciation (The Default)

This is the standard method the IRS requires for real estate:

• Residential rental property: 27.5-year recovery period
• Commercial property: 39-year recovery period

The calculation is simple:

Annual depreciation = (Purchase price - Land value) / Recovery period

Example

You buy a residential rental for $300,000. The land is worth $50,000.

• Depreciable basis: $300,000 - $50,000 = $250,000
• Annual depreciation: $250,000 / 27.5 = $9,091 per year

That’s a $9,091 deduction every year for 27.5 years — without spending a single dollar beyond the purchase.

At a 24% tax rate, that’s $2,182 in annual tax savings from depreciation alone.

When Depreciation Starts

Depreciation begins when the property is placed in service — meaning it’s ready and available for rent. This is typically:

• The purchase date for a property you rent immediately
• The date you list it for rent after completing renovations
• Not the date you close on a property you’re still rehabbing (depreciation starts when the rehab is done and it’s available for tenants)

RealBooks uses the purchase date you enter as the placed-in-service date. If your timeline differs, adjust the date in the property settings.

First-Year and Last-Year Rules

The IRS uses a “mid-month convention” for real estate: regardless of which day in the month you place the property in service, you get half a month’s depreciation for that month.

If you close on July 15:

• You get 5.5 months of depreciation in Year 1 (July 15 through December = 5 full months + 0.5 for July)
• Year 2 through Year 27 get a full 12 months
• Year 28 gets the remaining balance

RealBooks handles this calculation automatically.

Cost Segregation (Accelerated Depreciation)

Straight-line depreciation treats the entire building as one asset. Cost segregation breaks it into components that can be depreciated faster:

Component Type	Recovery Period	Examples
Personal property	5 years	Appliances, carpet, cabinetry, light fixtures, window treatments
Land improvements	15 years	Landscaping, driveways, fencing, outdoor lighting, sidewalks
Building structure	27.5 or 39 years	Walls, roof, foundation, core HVAC, plumbing

The Impact

Using the same $250,000 depreciable basis:

Method	Year 1 Deduction	Years 2-5 Average	Total Over 5 Years
Straight-line only	$9,091	$9,091	$45,455
With cost segregation	$40,000-$80,000+	Varies	$80,000-$130,000+

The total depreciation over the life of the property is the same — cost segregation doesn’t create new deductions, it moves them forward. You get bigger deductions in the early years when the money is most valuable to you.

How to Run It in RealBooks

1. Go to Tax Reporting > Cost Segmentation
2. Select the property
3. RealBooks analyzes the components and generates a schedule
4. Review the savings projection (standard vs. accelerated side-by-side)
5. Approve to apply the accelerated schedule to your tax reports

See the full guide: Cost Segmentation

When Cost Segregation Makes Sense

• Properties valued at $200,000+ (excluding land) — the dollar benefit is more meaningful
• Year of purchase — maximizes the front-loaded deductions
• After a major renovation — capital improvements can be cost-segregated too
• Commercial properties — 39-year default schedule means more to reclassify
• High-income investors — more income to offset means more tax savings

When It Might Not Be Worth It

• Low-value properties (under $150,000 building value)
• Properties you plan to sell within 1-2 years (depreciation recapture may offset the benefit)
• If you don’t have enough income to offset the larger deduction

Bonus Depreciation

Bonus depreciation lets you deduct a large percentage of certain asset costs in the first year — on top of the normal schedule.

Under current tax law, bonus depreciation applies to:

• 5-year property (appliances, carpet, fixtures)
• 15-year property (land improvements)
• Used property (not just new construction — this changed in 2017)

Note

Bonus depreciation percentages change based on legislation. The rate has been phasing down from 100%. Check with your CPA for the current year’s rate, or review the schedule RealBooks generates — it applies the current rate automatically.

How It Works with Cost Segregation

Cost segregation identifies which components qualify for 5-year and 15-year recovery. Bonus depreciation then lets you deduct a percentage of those components immediately.

Example: Your cost segregation identifies $60,000 in 5-year property. At 60% bonus depreciation:

• Bonus deduction (Year 1): $60,000 x 60% = $36,000
• Remaining $24,000 depreciated over the 5-year schedule

Combined with your regular building depreciation, this can produce a Year 1 deduction that exceeds your actual rental income — creating a paper loss that offsets income from other sources (subject to passive activity rules).

Depreciation on Capital Improvements

When you renovate or improve a property, the improvement gets its own depreciation schedule — separate from the original building.

How It Works

1. You spend $40,000 on a new kitchen (capital improvement)
2. RealBooks creates a new depreciation entry for $40,000
3. The kitchen depreciates over 27.5 years (residential) starting from the date it was placed in service
4. You can also run cost segregation on the improvement to accelerate portions of it

What Counts as a Capital Improvement

The IRS uses three tests:

• Betterment — Makes the property better than before (new roof, upgraded HVAC)
• Adaptation — Adapts the property to a new use (converting garage to apartment)
• Restoration — Restores the property after damage or deterioration (rebuilding after a fire)

If the work meets any of these, it’s a capital improvement. Regular repairs (fixing a leak, patching a wall) are deducted immediately on Schedule E.

Tracking in RealBooks

When you categorize an expense as a Capital Improvement, RealBooks:

• Adds it to the property’s depreciable basis
• Creates a separate depreciation schedule for the improvement
• Reflects the new depreciation in your Form 4562
• Updates your property’s adjusted basis (important for capital gains when you sell)

Depreciation Recapture: What Happens When You Sell

Here’s the trade-off: when you sell a property, the IRS “recaptures” the depreciation you’ve claimed.

How Recapture Works

1. You bought a property for $250,000 (building only)
2. Over 10 years, you claimed $90,909 in depreciation
3. Your adjusted basis is now $250,000 - $90,909 = $159,091
4. You sell for $350,000
5. Your gain is $350,000 - $159,091 = $190,909
6. Of that gain, $90,909 is depreciation recapture (taxed at up to 25%)
7. The remaining $100,000 is capital gains (taxed at long-term rates, typically 15-20%)

Is Depreciation Still Worth It?

Almost always yes. Here’s why:

• You get the deduction now (when the money is worth more) and pay recapture later
• The recapture rate (25%) may be similar to or lower than your ordinary income rate
• If you 1031 exchange into another property, recapture is deferred further
• The time value of those early deductions far exceeds the eventual recapture cost
• You might never pay recapture if you hold the property indefinitely or pass it to heirs (stepped-up basis)

Accelerated Depreciation and Recapture

Cost segregation increases your Year 1-5 deductions but also increases the recapture amount when you sell. The math still works in your favor for most investors — but run the numbers or talk to your CPA if you plan to sell within a few years.

The IRS Forms

Here’s how depreciation shows up on your tax returns:

Form	What It Shows
Form 4562	The complete depreciation schedule — every property, every improvement, every component (if cost segregation was done)
Schedule E, Line 18	The total depreciation amount for each rental property (pulled from Form 4562)
Schedule D + Form 8949	Depreciation recapture when you sell (the amount becomes part of your gain)

RealBooks generates all of these automatically. Form 4562 is built from your property data and cost segregation schedules. Schedule E pulls the depreciation total. Schedule D calculates the recapture on sale.

Common Depreciation Mistakes

1. Not Separating Land Value

If you depreciate the full purchase price (including land), you’re over-claiming and the IRS can disallow it. Always separate land from building value. Common methods:

• Use the county tax assessment ratio (e.g., if the county assesses 75% to building and 25% to land, apply that ratio)
• Get an appraisal that breaks it out
• Use the ratio from your closing documents if available

2. Forgetting to Depreciate Improvements

A $30,000 roof replacement gets its own 27.5-year schedule. If you expense it as a repair, you lose 26.5 years of future deductions. If you capitalize it but forget to set up depreciation, you lose the annual deduction entirely.

3. Starting Depreciation on the Wrong Date

Depreciation starts when the property is placed in service (available for rent), not when you close on it. If you buy a property in March and spend 6 months rehabbing it before listing for rent in September, depreciation starts in September.

4. Not Claiming Depreciation at All

Some investors skip depreciation because they don’t want recapture when they sell. This doesn’t work. The IRS requires you to reduce your basis by the “allowable” depreciation whether you claimed it or not. You’ll owe recapture regardless — so you might as well take the deduction now.

5. Using the Wrong Recovery Period

• Residential rental: 27.5 years
• Commercial: 39 years
• A property that’s 50% residential and 50% commercial may need to be split

Common Questions

When does depreciation start for a new construction property? When the property is placed in service — typically when the certificate of occupancy is issued and the property is available for rent or use.

Can I depreciate a property I live in part-time? You can depreciate the rental-use portion. If you rent a property 9 months of the year and use it personally for 3 months, you depreciate 75% of the building value.

What if I bought a property years ago and haven’t been claiming depreciation? File Form 3115 (Change in Accounting Method) to catch up. Your CPA can calculate the accumulated missed depreciation and deduct it in a single year. This is one of the most common “found money” situations in real estate tax planning.

Does depreciation affect my cash flow? No. Depreciation is a non-cash deduction — it reduces your taxable income without reducing the actual cash in your bank account. That’s what makes it so powerful.

Can I choose not to depreciate a property? Technically you can choose not to claim it on your return, but the IRS will still reduce your basis by the “allowable” depreciation amount when you sell. You’d be leaving money on the table with no benefit.