Mobile Home Depreciation Life: IRS Rules Every Park Owner Must Know

When you own a mobile home park, the IRS does not see one asset. It sees a collection of assets, each with its own defined recovery period — its “depreciation life.” Getting those recovery periods right is not a minor technical detail. It is the foundation of your entire tax strategy as a park owner.

The depreciation life assigned to each asset determines how fast you can recover its cost. Faster recovery means larger early-year deductions. And for MHP owners with POHs, land improvements, and multiple asset classes under one acquisition, the difference between correct and incorrect depreciation lives can be substantial.

This post covers the IRS rules that govern depreciation life for every major asset class in a mobile home park — drawn directly from the MACRS framework in IRS Publication 946 and the applicable asset class tables.

The Framework: MACRS and Why It Governs Your Returns

Most MHP assets placed in service after 1986 are depreciated under the Modified Accelerated Cost Recovery System, or MACRS. MACRS is the IRS’s standard framework for depreciation, and it assigns every depreciable business asset to a specific property class with a defined recovery period and depreciation method.

MACRS does not give you discretion on recovery periods. The IRS has established asset classes — found in Revenue Procedure 87-56 and incorporated into IRS Publication 946 — that tell you exactly what depreciation life applies to each type of asset. Your CPA’s job is to correctly identify which class each asset belongs to. That identification is where most errors occur in MHP taxation.

Park-Owned Homes: The 5-Year Recovery Period

Park-owned homes (POHs) — the manufactured homes you own and rent to residents — are among the most valuable and most misunderstood assets in your park from a tax perspective. When these homes retain their personal property title and are used in the active conduct of your mobile home park business, they are classified under IRS Asset Class 00.12.

Asset Class 00.12 covers manufactured homes as personal property. The MACRS recovery period for 5-year property is exactly that: 5 years. The applicable depreciation method is 200% declining balance, switching to straight-line when that produces a larger deduction. The applicable convention is the half-year convention (or mid-quarter convention if more than 40% of depreciable property is placed in service in the last quarter of the year).

This 5-year life is not a loophole or an aggressive position. It is the correct application of the IRS asset class tables to the specific characteristics of a manufactured home held as personal property in an active MHP business. The problem is that many CPAs unfamiliar with MHP taxation simply apply the residential real property class (27.5 years) out of habit, without examining whether the asset meets the criteria for that class.

The titling question matters here. If a manufactured home has been de-titled under state law — surrendered its certificate of title and been permanently affixed to a foundation — it may have been converted to real property. In that case, the 27.5-year residential real property class may be correct. The determination must be made on a home-by-home basis, examining the title status and how the home is held under applicable state law.

Land Improvements: The 15-Year Recovery Period

Land improvements are a distinct asset class that represents some of the most commonly misclassified property in an MHP acquisition. Under MACRS, land improvements that are not specifically included in any other asset class and are not otherwise excluded are classified as 15-year property.

For mobile home parks, the list of 15-year land improvements is extensive. Roads, parking lots, and driveways that serve the park. Underground utility distribution systems — water lines, sewer lines, electric conduit. Fencing. Storm drainage infrastructure. Sidewalks. Outdoor lighting structures. Playground equipment and amenity structures. Swimming pool infrastructure.

The depreciation method for 15-year property is 150% declining balance, switching to straight-line. The applicable convention is the half-year convention. And critically, 15-year land improvements are eligible for bonus depreciation under the TCJA framework — which means qualifying assets can be deducted at an accelerated rate in the year placed in service, subject to the applicable phase-down percentage for the tax year.

Residential Structures: The 27.5-Year Recovery Period

Residential rental property — structures used to provide residential housing to tenants — is depreciated over 27.5 years under the straight-line method using the mid-month convention. For most MHP owners, the assets in this class are limited: a permanently constructed residential structure on the property, or manufactured homes that have been converted to real property through de-titling.

The mid-month convention means you treat the asset as placed in service in the middle of the month it was actually placed in service, regardless of the actual date. The first-year deduction is calculated based on the number of half-months remaining in the tax year after placement in service.

Unlike 5-year and 15-year property, 27.5-year residential real property does not qualify for bonus depreciation under current law. This is one of the primary reasons that correctly pulling faster-depreciating assets out of the building basis is so valuable — those assets become bonus-eligible once properly classified.

Commercial Structures: The 39-Year Recovery Period

Non-residential real property — commercial structures used for business purposes rather than residential housing — depreciates over 39 years under the straight-line method with the mid-month convention. In an MHP context, this class typically covers the park office, maintenance storage buildings, and other permanent commercial structures on the property.

The 39-year recovery period is the longest available under MACRS for depreciable property. Like 27.5-year property, commercial real property does not qualify for bonus depreciation. The goal with these assets is accurate identification and basis allocation — making sure no 5-year or 15-year assets are incorrectly blended into this slow class.

The Recovery Period Comparison by Asset Type

Bonus Depreciation Eligibility by Recovery Class

Under the Tax Cuts and Jobs Act of 2017, bonus depreciation was expanded to cover used property as well as new property, and the rate was set at 100% for qualifying assets placed in service after September 27, 2017. The TCJA bonus rate has been phasing down since 2023. The phase-down schedule established in current law is:

80% for assets placed in service in 2023. 60% for 2024. 40% for 2025. 20% for 2026. 0% for 2027 and after — unless Congress acts to extend or modify bonus depreciation provisions.

Note: Tax legislation is subject to change, and the phase-down schedule reflects current law at the time of this writing. Verify current bonus depreciation rules with your MHP CPA before making elections.

The key eligibility rule: only property with a MACRS recovery period of 20 years or less qualifies for bonus depreciation. This means 5-year POHs and 15-year land improvements qualify. Residential real property (27.5 years) and commercial real property (39 years) do not.

This rule is the core reason cost segregation creates such dramatic tax acceleration. By identifying and documenting assets that belong in the 5-year and 15-year classes — rather than leaving them in the 27.5 or 39-year building basis — you move them into bonus depreciation eligibility. Learn how this works in practice in our post on bonus depreciation for mobile home park owners.

The Lookback Correction: Form 3115

If your prior-year returns used the wrong depreciation life for any MHP assets — POHs at 27.5 years, land improvements blended into the building basis — you have not permanently lost those deductions. The IRS provides a correction mechanism through Form 3115, Application for Change in Accounting Method.

A change in the depreciation life of a specific asset is treated as a change in accounting method. A lookback cost segregation study identifies the assets that were misclassified and calculates what the correct depreciation would have been under the proper recovery periods from the original placed-in-service date.

The difference between what was deducted and what should have been deducted is calculated as a Section 481(a) adjustment. This adjustment — which represents the cumulative missed depreciation from prior years — is recognized in the tax year the Form 3115 is filed, typically as a single below-the-line deduction. You do not need to amend each prior-year return individually.

The Form 3115 process is procedurally specific. It must be attached to your timely filed tax return for the year of change, and a copy must be sent to the IRS national office. An MHP-specialized CPA will have experience with this process and can manage it correctly. See our overview of what makes MHP accounting different for more context on why this level of specialization matters.

Why “Mobile Home Depreciation Life IRS” Searches Lead Here

Park owners searching for “mobile home depreciation life IRS” are usually trying to answer a specific question: how long do I depreciate this asset? The answer depends entirely on what that asset is and how it is classified under state law and IRS guidelines.

For a personal-property-titled manufactured home used in a mobile home park business: 5 years. For a road or utility line serving the park: 15 years. For a permanent residential structure: 27.5 years. For a park office: 39 years. For the land itself: never — land is not depreciable.

The challenge is that applying these rules correctly to an actual MHP acquisition requires a detailed asset-by-asset analysis. That analysis is what a qualified MHP CPA and a cost segregation engineer do together. The output is a depreciation schedule where every line item has a documented, defensible recovery period based on IRS rules — not a guess and not a default.

For a full breakdown of how these depreciation principles connect to your overall financial reporting, see our guide to MHP financial reporting and what your books should show every month.

Frequently Asked Questions

For the authoritative IRS guidance on MACRS recovery periods, see IRS Publication 946: How to Depreciate Property.

This content is for educational purposes only and does not constitute tax or legal advice. The MHP Accountant recommends consulting a qualified CPA for advice specific to your situation.