Depreciation is not valuation

What depreciation is doing

Depreciation answers a timing question: how much of an asset's cost belongs to this period? It does not answer a price question: what would the asset sell for today?

US GAAP describes depreciation accounting as a system that distributes the cost, or other basic value, of a tangible capital asset, less salvage if any, over the asset's estimated useful life in a systematic and rational way. The Codification then says the point directly: it is a process of allocation, not of valuation. That language is in ASC 360-10-35-4.

Three terms keep the idea precise.

Cost is the amount recognized when the asset is acquired or constructed. For equipment, that is usually the cash or cash equivalent given up to get the asset ready for use.

Salvage value, also called residual value, is the amount the company currently expects to recover at the end of the asset's useful life. It is an estimate, not a promise.

Book value, or carrying amount, is cost minus accumulated depreciation, and minus any impairment loss that has been recognized. Accumulated depreciation is the portion of cost already allocated to past periods. It is not a separate pile of cash, and it is not a measurement of lost market value.

The expense in the current period is the cost allocated to that period. The credit goes to accumulated depreciation, a contra-asset account, so the balance sheet shows both the original cost and the amount allocated so far.

A worked example

This example is hypothetical. Northline Co. buys a machine for its own use.

• Cost: $50,000
• Estimated salvage value: $5,000
• Estimated useful life: 5 years
• Method: straight-line, used here because the arithmetic is easy to follow

The depreciable amount is the cost that will be allocated:

$50,000 − $5,000 = $45,000

Annual straight-line depreciation is that amount divided by the useful life:

$45,000 ÷ 5 years = $9,000 per year

1. Cost$50,000
2. −Residual value$5,000
3. =Depreciable base$45,000
4. ÷Useful life5 years
5. =Annual depreciation$9,000

Depreciation expense for one period, in currency units. The calculation does not estimate a market price.

Cost

Historical cost recognized for the asset, in currency units.

Residual value

Estimated salvage expected at the end of the useful life, in currency units. US GAAP often calls this salvage value.

Useful life

Estimated number of periods the asset will provide service to the reporting entity.

Each year, while the estimates hold, Northline records:

Account	Debit	Credit
Depreciation expense	$9,000
Accumulated depreciation (contra-asset)		$9,000
Totals	$9,000	$9,000

Neither line is cash. The cash left when the machine was bought.

That entry reduces profit by $9,000. It does not record a cash payment. The cash left when the machine was purchased, in an earlier entry.

At the end of year 5, book value equals the $5,000 salvage estimate. The $45,000 of cost has been allocated. Check any row by subtracting accumulated depreciation from the $50,000 cost. At the end of year 1, $50,000 − $9,000 = $41,000.

Now add a labeled hypothetical, separate from the accounting. Suppose that at the end of year 1 a buyer would pay $46,000 for the same machine. The financial statements still show a book value of $41,000. Northline does not record a $5,000 gain, because it has not sold the machine, and US GAAP does not write this kind of asset up to that price. The $46,000 is an illustration of a resale price. It is not a market quote and not an appraisal in the example.

The schedule above is the explanation. The calculator repeats the same straight-line arithmetic so you can change the inputs. It does not estimate a market price. Any resale amount you type stays outside the accounting calculation.

How to read property and equipment

When property, plant, and equipment appears on a balance sheet, the number under the cost model is book value. Use it as the unallocated cost of assets still in service, not as the amount the company could raise by selling them.

The notes are part of the reading. They usually disclose the depreciation method, the useful lives or the range of lives, and the accumulated depreciation. An impairment loss, if one was recognized, is a different event from the recurring depreciation expense. The cash flow statement is the other place depreciation shows up: under the indirect method it is added back to net income because the expense was not a cash payment. That add-back does not turn depreciation into a source of cash. Profit is not cash walks through that distinction.

A common misconception

A common reading is that accumulated depreciation measures how much market value the asset has lost. It does not. It measures how much cost has been allocated.

An asset can be worth more than its book value, or less. Depreciation can continue in a period when the asset's fair value is above book value. Professional guidance applying ASC 360-10-35-4 makes that operational: if the company expects to sell later at a gain, but the asset is not yet held for sale, depreciation still continues. The asset is not written up to appraisal, market, or current value.

IFRS states the same allocation idea. IAS 16 defines depreciation as the systematic allocation of an asset's depreciable amount over its useful life, and IAS 16.52 says depreciation is recognized even if fair value exceeds carrying amount, as long as residual value does not exceed that carrying amount.

Where this stops

Depreciation is not the only way a long-lived asset's carrying amount can change.

Impairment is a different test. Under US GAAP, a long-lived asset classified as held and used is not routinely marked to fair value. It is tested for recoverability. If the carrying amount is not recoverable, an impairment loss is measured using fair value. That loss is not depreciation expense. The recoverability and measurement guidance is in ASC 360, including ASC 360-10-35-17. This page does not walk through that test.

Held for sale is a different measurement. Once an asset is classified as held for sale, ASC 360-10-35-43 measures it at the lower of carrying amount or fair value less cost to sell, and depreciation stops.

IFRS permits a revaluation model that US GAAP does not. IAS 16.29 through 16.31 let an entity choose, for a class of property, plant, and equipment, to carry assets at a revalued amount: fair value at the revaluation date, less later accumulated depreciation and impairment. Depreciation then allocates that new depreciable amount. It is still allocation after the revaluation. It is not US GAAP. A company reporting under US GAAP does not revalue its property and equipment upward under ASC 360.

Tax depreciation is a tax calculation. Accelerated cost recovery for a tax return can differ from book depreciation. A tax recovery period is not automatically the useful life used in the financial statements.

Land is ordinarily not depreciated. Land used in operations is treated as having an indefinite life, so there is no depreciable amount to allocate. A building on that land is a separate asset and is depreciated. Land is not immune from impairment.

Some assets use a fair-value model on purpose. Certain investments and derivatives are remeasured to fair value, with the change recognized under those topics' rules. Do not import this page's cost-allocation conclusion into those assets.

Straight-line is not the only acceptable pattern. US GAAP requires a systematic and rational method. Units of production, or a declining pattern that reflects how the asset is consumed, can be appropriate. The $9,000 in the example is straight-line arithmetic for these inputs. Change the method, the salvage estimate, or the life, and the periodic expense changes. The conclusion does not: the procedure is still allocation, not valuation.