Accelerated Depreciation Schedule (2026): 5-Year, 15-Year, 39-Year Class Lives Explained

The accelerated depreciation schedule is the piece most CPA-facing articles skip — the class-by-class reference for what actually goes where, how the deduction is calculated year by year, and how the schedule looks after IRS §168(k) bonus depreciation is applied. This article is the reference. It walks through each MACRS class, lists the specific components that fit each bucket, shows the applicable method and convention, and works through a full deduction schedule so the mechanic is visible from Year 1 through Year 39.

For the umbrella framework of how MACRS, §168(k), and §179 interact, see our accelerated depreciation hub guide. This article assumes you want the class-life reference and the actual schedule numbers.

The full MACRS class table: what each recovery period covers and how it depreciates

MACRS assigns tangible property to one of several class lives per Rev. Proc. 87-56. For real estate purposes, five classes matter. Each has its own recovery period, depreciation method, and convention that determines Year 1 deduction.

Two mechanics matter for reading this table. First, the 20-year §168(k) ceiling is the reason 5-year, 7-year, and 15-year classes get 100% Year-1 bonus depreciation while 27.5-year and 39-year classes do not. This is what makes cost segregation valuable — it moves dollars out of the two above-ceiling classes into the three below-ceiling classes where §168(k) applies. Second, the mid-month convention on real property means Year-1 depreciation on a 27.5-year or 39-year asset depends on which month the property was placed in service; the half-year convention on 5-year and 15-year property is uniform across the year (except for the mid-quarter exception).

MACRS 5-year property covers the personal property inside a rental

MACRS 5-year property under Rev. Proc. 87-56 asset class 00.11 and related classes is tangible personal property with an ADR midpoint life of 4 to 10 years. For a residential rental or short-term rental, the 5-year bucket typically includes:

• Appliances — refrigerator, dishwasher, oven, range, microwave, washer, dryer, wine cooler, built-in coffee machines, garbage disposal.
• Carpet and non-permanent flooring — carpet, area rugs conveyed with sale, laminate and vinyl plank when not embedded in structural subfloor.
• Decorative lighting — pendant lights, chandeliers, sconces, decorative fixtures (the fixture itself, not the electrical rough-in).
• Cabinetry — kitchen cabinets, bathroom vanities, built-in shelving when treated as personal property under the facts of the case.
• Decorative plumbing fixtures — faucets, showerheads, decorative sinks, freestanding tubs, frameless glass shower enclosures.
• Window treatments — blinds, shades, curtains, drapes, motorized systems.
• Furniture, fixtures, and equipment (FF&E) — all furniture conveyed with the sale (beds, sofas, dining sets, patio furniture, artwork), televisions and AV equipment, smart-home hubs and control systems.
• Low-voltage wiring and dedicated circuits — network cabling, security wiring, audio wiring, dedicated tenant-use circuits.
• Decorative millwork — non-structural crown molding, wainscoting, decorative trim.

The 5-year class uses the 200% declining balance method with the half-year convention (mid-quarter if the aggregate 40% test triggers). Under §168(k), 5-year property placed in service after January 19, 2025 receives 100% first-year bonus depreciation — the full adjusted basis is deducted in Year 1, bypassing the 200% DB schedule entirely for the bonused portion. For a taxpayer who elects out of §168(k) for a specific class, the regular 5-year MACRS schedule applies: Year 1 20.00% (half-year), Year 2 32.00%, Year 3 19.20%, Year 4 11.52%, Year 5 11.52%, Year 6 5.76%.

MACRS 15-year property covers land improvements outside the building shell

MACRS 15-year property under Rev. Proc. 87-56 asset class 00.3 covers land improvements — depreciable improvements to real estate that are separate from the building structure. For residential rentals and STRs, the 15-year bucket typically includes:

• Pools and hot tubs — in-ground pools, spa systems, hot tub installations, associated equipment pads.
• Fire pits and outdoor fireplaces — permanent outdoor gas or wood-burning installations.
• Outdoor kitchens — built-in outdoor cooking areas, weatherproof cabinetry, plumbed exterior sinks.
• Pergolas, gazebos, covered structures — freestanding shade structures not attached to the primary building.
• Exterior paved surfaces — driveways, walkways, patios, courtyards, decorative pavers.
• Landscaping and irrigation — installed plantings, sod, mulching systems, irrigation lines, sprinkler heads, drip systems.
• Retaining walls, terracing, hardscape — engineered walls, tiered landscaping, decorative rock features.
• Fencing — perimeter fencing, decorative fencing, pool safety fencing.
• Outdoor lighting — path lighting, landscape lighting, pool lighting, deck lighting, dusk-to-dawn systems.
• Site utilities outside the building envelope — exterior gas lines, exterior electrical service, well and septic components.

The 15-year class uses the 150% declining balance method with the half-year convention. Under §168(k), 15-year land improvements placed in service after January 19, 2025 receive 100% first-year bonus depreciation. For a taxpayer who elects out of §168(k), the regular 15-year MACRS schedule delivers a first-year deduction of 5.00% (half-year), then declining amounts over the full 15-year (16-year with the half-year convention) recovery period. On an STR with a hot tub, deck, paved driveway, and mature landscaping, the 15-year bucket is often the second-largest bonus-eligible slice after 5-year FF&E.

The 27.5-year and 39-year real property classes house the structural shell

IRC §168(c) sets a 27.5-year recovery period for residential rental real property and a 39-year recovery period for nonresidential real property. Both use the straight-line method with the mid-month convention. Neither qualifies for IRS §168(k) bonus depreciation because both exceed the 20-year ceiling.

The 27.5-year bucket covers the structural shell of any building where at least 80% of gross rental income is from dwelling units — long-term rentals, short-term rentals under IRC §469(c)(2), duplexes, quads, and multifamily properties. Components that stay in the 27.5-year shell:

• Structural components — foundation, framing, roof structure, exterior walls, load-bearing interior walls.
• Building envelope — windows, exterior doors, roofing materials, siding, insulation.
• Central HVAC — ductwork, main air handler, central heating and cooling infrastructure.
• Rough-in plumbing and electrical — the pipes, wires, and conduit embedded in the walls and floors, not the fixtures at the endpoints.
• Drywall, paint, embedded tile — interior finishes structurally attached to walls and floors.
• Structural fireplace surrounds — masonry fireplaces integrated into the framing.

The 39-year bucket covers nonresidential real property — commercial buildings, hotels (which typically fail the 80% residential dwelling test), retail, office, industrial. The list of structural components is essentially the same as 27.5-year residential; the difference is only the recovery period. For nonresidential property, qualified improvement property (QIP) — interior improvements to a nonresidential building placed in service after the building itself — has a separate 15-year recovery period and does qualify for §168(k).

A property owner who does not commission a cost segregation study leaves nearly all of the depreciable basis in the 27.5-year or 39-year bucket by default. That is the entire economic case for cost segregation: moving dollars out of these two long-recovery classes into the shorter classes where §168(k) applies. For the mechanics of that engineering study, see our accelerated depreciation for real estate guide.

Here is a full worked deduction schedule on a $500,000 residential rental shell

Numbers illustrate the schedule better than percentages. Consider a $500,000 depreciable basis residential rental shell (post-cost-seg, this is the 27.5-year portion after 5-year and 15-year components have been carved out) placed in service in September 2026. The 27.5-year class uses straight-line with mid-month convention.

The mid-month convention treats the property as placed in service at the midpoint of the placement month, so a September placement gets 3.5 months of Year-1 depreciation (mid-September through end of December). The annual deduction of $18,182 runs for years 2 through 27 (26 full years), and Year 28 captures the remaining 8.5 months of the 27.5-year schedule. Total depreciation across the 27.5-year life equals the full $500,000 basis. This is the schedule that runs alongside any §168(k) or §179 elections on other portions of the property — the shell is on its own straight-line clock regardless of what happens with bonus depreciation elsewhere in the return.

Now consider the same $500,000 property but broken into components via cost segregation, with §168(k) applied to the qualifying portions:

The comparison is stark: $5,303 of Year-1 deduction without cost segregation vs. $124,030 with cost segregation and §168(k) — a difference of about $118,700 in Year-1 write-offs from the same $500,000 property. The mechanic is entirely in the class-life reclassification and the §168(k) bonus rate; nothing about the property physically changed. This is the accelerated depreciation schedule at work — MACRS class lives set what goes where, §168(k) turns the qualifying dollars into Year-1 deductions.

The half-year and mid-quarter conventions determine Year-1 treatment on 5-year and 15-year property

For any taxpayer electing out of §168(k) on a specific class, the applicable convention on the underlying MACRS schedule matters. Two conventions apply to 5-year, 7-year, and 15-year property:

• Half-year convention (default). All property placed in service during the year is treated as placed in service at the midpoint of the year, regardless of actual placement date. Year-1 deduction is half of what a full year would deliver. Year 6 (for 5-year property) captures the remaining half year — which is why the 5-year MACRS schedule actually runs six calendar years.
• Mid-quarter convention. Triggered when more than 40% of the aggregate basis of all §168 property placed in service during the year is placed in service during the last quarter. When triggered, the mid-quarter convention treats all property placed in service each quarter as placed in service at the midpoint of that quarter. The result is a smaller Year-1 deduction on last-quarter placements and a larger deduction on first-quarter placements.

The mid-quarter test aggregates across all §168 property for the year, so a taxpayer with a single large purchase in December can find themselves subject to mid-quarter treatment on that entire year's placements. §168(k) bonus property is excluded from the mid-quarter aggregation, so a full 100% §168(k) election on the 5-year and 15-year components of a Q4 real estate purchase generally sidesteps the issue. This is worth verifying with a CPA on any late-year acquisition — the interaction between §168(k) elections and the mid-quarter test can meaningfully change the shape of Year-1 deductions.

What Form 4562 actually looks like with the schedule filled in

The accelerated depreciation schedule flows through Form 4562 (Depreciation and Amortization). The form has six parts; four matter for real estate:

• Part I — §179 election. Line-item entries for property being expensed under §179, up to the 2026 $1,220,000 deduction limit and subject to the $3,050,000 phase-out and taxable-income cap.
• Part II — Special (§168(k)) depreciation allowance. Aggregate of qualifying property with a 20-year or less recovery period, at the 100% Year-1 bonus rate for 2026 placements.
• Part III — MACRS depreciation. Breakouts by class life (5-year, 7-year, 15-year, 27.5-year, 39-year), method, convention, and Year-1 deduction.
• Part V — Listed property (vehicles, computers used in the activity). Less common for real estate.

The engineering-based cost segregation report is what feeds Form 4562. Every component identified by the study is entered with its Rev. Proc. 87-56 classification, recovery period, method, and convention. The CPA then decides which items to elect §179 for, and §168(k) is applied by default to any qualifying MACRS property with a 20-year or less recovery period unless the taxpayer elects out by class. Regular MACRS runs the remaining schedule for anything not §179-expensed or §168(k)-bonused, plus the 27.5-year or 39-year shell balance.

How state conformity changes the schedule on the state return

The MACRS class-life schedule described above is preserved on almost every state return. State decoupling from federal depreciation targets specifically IRS §168(k) bonus depreciation, not the underlying MACRS class lives or methods. That means the accelerated depreciation schedule on the state return in a decoupling state looks like the schedule with the §168(k) layer stripped out — 5-year property depreciates over five years using 200% DB, 15-year property depreciates over 15 years using 150% DB, and the 27.5-year and 39-year shells depreciate straight-line as they do federally.

A California taxpayer with $124,030 of federal Year-1 depreciation (Scenario B above) would see the §168(k) portion — $120,000 — addbacked at the state level and instead spread across the regular MACRS schedules. The state Year-1 deduction would come in around $22,000–$26,000 (200% DB on 5-year plus 150% DB on 15-year plus straight-line on the 27.5-year shell, with the mid-year and mid-month conventions applied). The MACRS class lives themselves don't change; only the §168(k) 100% Year-1 acceleration is what gets stripped.

Partial-conformity states (North Carolina 85% addback, Minnesota 80% addback) allow a portion of the §168(k) deduction and depreciate the rest over the regular MACRS life. Full-conformity states (Texas, Florida, Tennessee, and most others) match the federal schedule dollar-for-dollar. Check the specific state before offer using our bonus depreciation conformity tool, or read the full 50-state bonus depreciation conformity guide. For a materially-participating STR owner specifically, the state-level impact on the schedule is walked through in our accelerated depreciation for STRs guide.

What about Alternative Depreciation System (ADS)?

The Alternative Depreciation System — ADS, IRC §168(g) — is the slower, longer-recovery straight-line alternative to MACRS. ADS is required for certain property (foreign-use property, tax-exempt-use property, listed property with 50% or less business use) and elective for property that would otherwise depreciate under regular MACRS. Recovery periods under ADS are longer than MACRS: 30 years for residential rental (vs. 27.5 under MACRS), 40 years for nonresidential (vs. 39), 9 years for most 5-year MACRS property, 20 years for 15-year land improvements.

ADS matters for accelerated depreciation planning in one specific case: a taxpayer who elects out of §168(k) bonus depreciation may also choose to use ADS instead of MACRS. This is unusual for accelerated depreciation purposes because the point of the strategy is to front-load deductions, and ADS moves in the opposite direction. But for taxpayers with foreign-use property, tax-exempt clients (co-ownership with tax-exempt entities), or specific planning around future high-marginal-rate years, ADS can enter the picture. For most STR and residential rental owners running standard §168(k) strategies, ADS is not part of the schedule.

Frequently asked questions

This article is for educational purposes only and does not constitute tax or legal advice. IRC §168, IRC §168(k), IRC §179, Rev. Proc. 87-56, and the associated Treasury regulations are complex; class-life determinations can be fact-intensive; individual facts and circumstances vary. Federal legislation is subject to change; this analysis reflects the law as of the publication date. Consult a qualified CPA or tax attorney familiar with real estate taxation before acting on any of this material.