3.2 Depreciation & Fixed Asset Accounting

Key Takeaways

  • Property, Plant, and Equipment (PP&E) are long-term tangible operating assets capitalized at historical acquisition cost, which includes purchase price plus all expenditures necessary to place the asset in its intended condition and location for use.
  • Depreciation under GAAP is a systematic process of cost allocation over an asset's useful life, not a valuation process to reflect fair market value.
  • The depreciable base (Depreciable Cost) equals Historical Cost minus Estimated Salvage (Residual) Value; straight-line depreciation allocates this base evenly across each period.
  • Accumulated Depreciation is a contra-asset account with a normal credit balance, paired with the asset account on the Balance Sheet to report Net Book Value (NBV).
  • When disposing of an asset, the asset and its accumulated depreciation are removed from the books, and any difference between Net Book Value and net disposal proceeds is recognized as a Gain (Credit) or Loss (Debit) on Disposal.
Last updated: August 2026

Depreciation & Fixed Asset Accounting

Fixed assets—formally classified under U.S. GAAP as Property, Plant, and Equipment (PP&E)—are tangible, long-lived resources owned and used in the active operations of a business. Unlike inventory (held for sale to customers) or short-term prepaid items, PP&E assets provide productive utility across multiple accounting periods. Accounting for fixed assets requires bookkeepers to master three sequential phases: initial capitalization, periodic depreciation, and final disposal.


1. Capitalization vs. Revenue Expenditures

A fundamental duty of the bookkeeper is distinguishing between costs that must be capitalized into an asset account on the Balance Sheet versus costs that must be expensed immediately on the Income Statement.

+-----------------------------------------------------------------------------+
|                   CAPITAL EXPENDITURE VS. REVENUE EXPENDITURE               |
|                                                                             |
|   CAPITAL EXPENDITURES (CapEx)           REVENUE EXPENDITURES               |
|   - Recorded on BALANCE SHEET (Assets)   - Recorded on INCOME STATEMENT     |
|   - Benefits MULTIPLE future periods     - Benefits ONLY the current period |
|   - Material acquisitions, structural    - Ordinary repairs, routine tune-  |
|     improvements, major overhauls          ups, cleaning, minor replacement |
|     that increase capacity or life.        parts that maintain operation.   |
+-----------------------------------------------------------------------------+

The Historical Cost Principle

Under the Historical Cost Principle, a fixed asset is initially recorded at all reasonable and necessary costs incurred to acquire the asset, transport it, and place it in condition and location ready for its intended productive use.

+-----------------------------------------------------------------------------+
|                   COMPONENTS OF CAPITALIZED HISTORICAL COST                 |
|                                                                             |
|   [+] Gross Purchase Price (less trade or cash discounts taken)             |
|   [+] Non-refundable Sales Taxes and Import Customs Duties                  |
|   [+] Freight-in, Shipping, Delivery, and In-Transit Insurance              |
|   [+] Site Preparation, Excavation, and Concrete Pad Foundation Work        |
|   [+] Professional Installation, Assembly, Wiring, and Engineering Setup   |
|   [+] Initial Testing, Trial Runs, and Calibration Costs                    |
|                                                                             |
|   [-] EXCLUDED (Expensed Immediately):                                      |
|       - Fines, parking tickets, or damage incurred during transit           |
|       - Repairs resulting from improper installation or mishandling         |
|       - Post-operational routine maintenance and insurance after placement |
+-----------------------------------------------------------------------------+

Worked Example: Machinery Cost Capitalization

Precise Manufacturing purchases industrial fabrication machinery. The invoice details are:

  • List price: $$50{,}000$ (with a $2%$ cash discount taken: $-$1{,}000$)
  • State sales tax: $$3{,}400$
  • Freight and shipping delivery: $$1{,}800$
  • In-transit insurance policy: $$350$
  • Reinforced concrete foundation installation: $$2{,}200$
  • Electrical contractor wiring and calibration: $$1{,}600$
  • Damage repair due to worker dropping a panel during unloading: $$750$

Capitalized Historical Cost Computation: Capitalized Cost=$49,000+$3,400+$1,800+$350+$2,200+$1,600=$58,350\text{Capitalized Cost} = \$49{,}000 + \$3{,}400 + \$1{,}800 + \$350 + \$2{,}200 + \$1{,}600 = \$58{,}350 (Note: The $$750$ repair is an uninsured damage casualty and is debited to Repairs & Maintenance Expense, NOT capitalized).

Asset Categorization: Land vs. PP&E

  • Land: Has an infinite economic life and is never depreciated. Historical cost includes purchase price, broker commissions, title fees, legal fees, back taxes assumed, and razing/demolition costs of old buildings less salvage proceeds.
  • Land Improvements: Driveways, parking lots, fences, outdoor lighting, and landscaping have limited lives and are depreciated separately.
  • Buildings & Equipment: Subject to periodic depreciation over estimated useful service lives.

2. Straight-Line Depreciation Mechanics

[!IMPORTANT] Depreciation Is Cost Allocation, Not Valuation. Depreciation is not a method to determine the current fair market resale value of an asset, nor does it establish a cash "fund" to replace the asset. Depreciation is strictly a system of allocating the historical cost of a tangible asset as an expense over the periods expected to benefit from its use.

Core Depreciation Terminology

  1. Historical Cost ($C$): Total capitalized acquisition cost.
  2. Salvage (Residual) Value ($S$): The estimated net recoverable value expected from selling or scrapping the asset at the end of its useful life.
  3. Depreciable Base (Depreciable Cost): $\text{Historical Cost} - \text{Estimated Salvage Value}$. This is the maximum total cumulative depreciation that can ever be recognized on the asset.
  4. Useful Life ($N$): The estimated period of productive service, expressed in years or months.

Straight-Line Depreciation Formula

The Straight-Line (SL) method allocates an equal amount of depreciation expense to each full accounting year throughout the asset's useful life:

Annual Depreciation Expense=Historical CostSalvage ValueUseful Life (Years)=Depreciable BaseN\text{Annual Depreciation Expense} = \frac{\text{Historical Cost} - \text{Salvage Value}}{\text{Useful Life (Years)}} = \frac{\text{Depreciable Base}}{N}

Straight-Line Rate=1N(e.g., a 5-year life has an annual rate of 15=20%)\text{Straight-Line Rate} = \frac{1}{N} \quad (\text{e.g., a 5-year life has an annual rate of } \frac{1}{5} = 20\%)

Monthly Depreciation Expense=Annual Depreciation Expense12\text{Monthly Depreciation Expense} = \frac{\text{Annual Depreciation Expense}}{12}


3. Partial-Year Depreciation Proration

Businesses rarely acquire fixed assets on January 1. When an asset is placed in service mid-year, depreciation must be prorated for the exact number of months it was active during that fiscal period.

+-----------------------------------------------------------------------------+
|                   PARTIAL-YEAR PRORATION CALCULATION FLOW                   |
|                                                                             |
|   [Annual SL Depreciation] x [ (Months in Service in Year 1) / 12 ]         |
+-----------------------------------------------------------------------------+

Worked Example: Equipment Purchased Mid-Year

  • Acquisition Date: April 1, 20X6
  • Capitalized Cost: $$32{,}000$
  • Estimated Salvage Value: $$2{,}000$
  • Estimated Useful Life: 5 years ($60 \text{ months}$)

Step 1: Calculate the Depreciable Base Depreciable Base=$32,000$2,000=$30,000\text{Depreciable Base} = \$32{,}000 - \$2{,}000 = \$30{,}000

Step 2: Calculate Annual and Monthly Depreciation Annual Depreciation=$30,0005=$6,000/year\text{Annual Depreciation} = \frac{\$30{,}000}{5} = \$6{,}000/\text{year} Monthly Depreciation=$6,00012=$500/month\text{Monthly Depreciation} = \frac{\$6{,}000}{12} = \$500/\text{month}

Step 3: Calculate Partial-Year Depreciation for 20X6 From April 1 through December 31 is 9 months of service: Year 1 (20X6) Depreciation=$6,000×912=$4,500\text{Year 1 (20X6) Depreciation} = \$6{,}000 \times \frac{9}{12} = \$4{,}500

GENERAL JOURNAL - ADJUSTING ENTRY
Date        Account Titles and Explanation                Debit       Credit
20X6
Dec 31      Depreciation Expense—Equipment ...........   $4,500
                Accumulated Depreciation—Equipment ...                $4,500
            (To record 9 months of straight-line depreciation)

4. Accumulated Depreciation & Book Value Presentation

Accumulated Depreciation is a contra-asset account with a normal credit balance. It directly offsets the corresponding fixed asset debit balance on the Balance Sheet.

Net Book Value (Carrying Value)

Net Book Value (NBV)=Historical CostAccumulated Depreciation\text{Net Book Value (NBV)} = \text{Historical Cost} - \text{Accumulated Depreciation}

BALANCE SHEET (PARTIAL PRESENTATION AS OF DECEMBER 31, 20X7)
Property, Plant, and Equipment:
    Machinery & Equipment (at cost) ...................   $32,000
    Less: Accumulated Depreciation—Equipment ..........   (10,500)
    Net Book Value of Equipment .......................              $21,500

(Note: Cumulative depreciation as of Dec 31, 20X7 = Year 1 [9 mos = $$4{,}500$] + Year 2 [12 mos = $$6{,}000$] = $$10{,}500$).

[!WARNING] Book Value vs. Salvage Floor: An asset can never be depreciated below its salvage value. Once Accumulated Depreciation reaches the Depreciable Base (meaning Net Book Value equals Salvage Value), periodic depreciation ceases immediately, even if the asset remains in daily operational use.


5. Accounting for Fixed Asset Disposals

When a fixed asset is retired, scrapped, sold, or exchanged, the bookkeeper must perform a four-step journalizing routine:

  1. Update Depreciation: Record depreciation up to the exact date of disposal.
  2. Remove Accumulated Depreciation: Debit Accumulated Depreciation for the cumulative balance to date.
  3. Remove Historical Cost: Credit the fixed asset account for its original gross cost.
  4. Record Proceeds & Recognize Gain or Loss: Gain (Credit) or Loss (Debit)=Net Cash ProceedsNet Book Value at Disposal Date\text{Gain (Credit) or Loss (Debit)} = \text{Net Cash Proceeds} - \text{Net Book Value at Disposal Date}
+-----------------------------------------------------------------------------+
|                     GAIN VS. LOSS ON FIXED ASSET DISPOSAL                   |
|                                                                             |
|   If Cash Proceeds > Net Book Value  -->  GAIN ON DISPOSAL (Credit: Revenue)|
|   If Cash Proceeds < Net Book Value  -->  LOSS ON DISPOSAL (Debit: Expense) |
|   If Cash Proceeds = Net Book Value  -->  NO GAIN OR LOSS                   |
+-----------------------------------------------------------------------------+

Disposal Case A: Sale at a GAIN

  • Asset Data: Delivery Truck original cost $=$25{,}000$; Accumulated Depreciation through sale date $=$18{,}000$.
  • Net Book Value: $$25{,}000 - $18{,}000 = $7{,}000$.
  • Transaction: Truck is sold for $$9{,}200$ cash.
  • Calculation: $\text{Cash Received (}$9{,}200\text{)} - \text{NBV (}$7{,}000\text{)} = \text{Gain of } $2{,}200$.
GENERAL JOURNAL
Date        Account Titles and Explanation                Debit       Credit
20X8
May 15      Cash .....................................   $9,200
            Accumulated Depreciation—Vehicles ........  $18,000
                Vehicles .............................               $25,000
                Gain on Disposal of Fixed Assets .....                $2,200
            (To record sale of delivery truck at a gain)

Disposal Case B: Sale at a LOSS

  • Transaction: The same truck ($ ext{NBV} = $7{,}000$) is sold for $$5{,}100$ cash.
  • Calculation: $\text{Cash Received (}$5{,}100\text{)} - \text{NBV (}$7{,}000\text{)} = \text{Loss of } $1{,}900$.
GENERAL JOURNAL
Date        Account Titles and Explanation                Debit       Credit
20X8
May 15      Cash .....................................   $5,100
            Accumulated Depreciation—Vehicles ........  $18,000
            Loss on Disposal of Fixed Assets .........   $1,900
                Vehicles .............................               $25,000
            (To record sale of delivery truck at a loss)

Disposal Case C: Total Retirement / Scrapping (Zero Proceeds)

  • Transaction: An obsolete computer system ($ ext{Cost} = $6{,}000$; $ ext{Accumulated Depreciation} = $5{,}200$; $ ext{NBV} = $800$) is discarded with zero scrap value.
GENERAL JOURNAL
Date        Account Titles and Explanation                Debit       Credit
20X8
Jun 30      Accumulated Depreciation—Equipment .......   $5,200
            Loss on Asset Retirement .................     $800
                Equipment ............................                $6,000
            (To record scrapping of fully obsolete computer)
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Fixed Asset Accounting Lifecycle
Test Your Knowledge

A printing company purchases a commercial printing press for $70,000 list price. The company pays $4,200 in sales tax, $2,000 in shipping freight, $1,500 for concrete footing installation, $800 to repair a roller dented by a forklift driver during plant transit, and $1,200 for a 1-year operating insurance policy. What total amount should be capitalized in the Equipment account?

A
B
C
D
Test Your Knowledge

On September 1, 20X6, a business acquires office furniture for $18,000. The furniture has an estimated useful life of 5 years and a salvage value of $3,000. Using straight-line depreciation, what is the depreciation expense recorded on December 31, 20X6?

A
B
C
D
Test Your Knowledge

A company sells a delivery van on October 31 for $11,500 cash. The van originally cost $36,000, and as of October 31, its Accumulated Depreciation was $28,000. Which of the following entries correctly records the sale?

A
B
C
D
Test Your Knowledge

What is the accounting classification and normal balance of Accumulated Depreciation?

A
B
C
D