Understanding depreciation methods
The chosen pattern for allocating an asset's cost to expense. Once you pick a pattern for an asset, you keep using it.
Definition
A depreciation method is the rule that sets the shape of each period's charge against a long-lived purchase. On the books, it is a choice, not an account you debit or credit.
The P&L still receives depreciation expense. The method only decides how large that figure is in this period versus later ones.
Where it shows up
Balance Sheet: Related to how fast accumulated depreciation grows.
P&L: Related to how depreciation expense is shaped each period.
See also: Straight-Line Depreciation · Depreciation Expense · Useful Life
When you look at your Balance Sheet, you will not find a line called depreciation method. You see the result: accumulated depreciation growing faster or slower against the related non-current assets.
The profit and loss statement shows the matching depreciation expense. A level pattern keeps that expense even; a front-loaded pattern takes more in early years.
The method lives on the depreciation schedule and in the capitalization policy, not as a Balance Sheet account. Readers see the effects, not the name of the choice.
This choice does not move cash. Cash moved, or will move, when the asset is bought.
Once a pattern is assigned to an asset, later periods should follow it. Changing it later makes both the schedule and the P&L harder to compare.
How it works
You pick the method when the asset is placed in service. Cost, useful life, and salvage still matter; the method is the extra choice about shape.
Straight-line is the pattern most small books use. It takes the same amount each full period, which is easy to check against the schedule.
Other patterns exist. They are not a catalog to shop from at every close; they are different shapes you would have chosen up front if the even pattern did not fit how the asset is used.
The books do not debit "depreciation method." Each period you still debit depreciation expense and credit accumulated depreciation; only the dollars change with the pattern.
Write the choice next to the asset on the schedule. Anyone posting the monthly entry should be able to see which pattern that item uses.
Stay with the same pattern for that asset. A one-time switch to manage a single year's profit is not what the method is for.
Tax rules can require a different pattern on a tax return than the one you use in the books. This page is the books choice, the one that shapes your P&L and Balance Sheet.
Example
A gym buys treadmills and chooses straight-line so each year takes the same slice. It writes that choice on the schedule and uses it for every later period.
This year's charge under that choice is $3,000. The gym records:
Debit: Depreciation expense $3,000
Credit: Accumulated depreciation $3,000
Depreciation expense on the P&L is $3,000, and accumulated depreciation rises by $3,000. Cash has not moved.
Next year the gym uses the same accounts and the same pattern. The method is the decision to keep that shape, not a new calculation invented at each close.
Common mix-ups
A depreciation method is not depreciation expense. The method is the pattern; the expense is the P&L account that receives the amount.
A method is not something you recast every year to smooth profit. You pick it for the asset, then you follow it.
Declining-balance and units-of-production would front-load or vary the charge. Naming them is only to say they are different shapes, not a list to rotate through.
Related terms
- Straight-Line Depreciation: Spreading an asset's cost evenly across each period of its useful life.
- Depreciation Expense: The periodic charge that spreads a fixed asset's cost over its useful life.
- Depreciation Schedule: The supporting schedule listing each asset, its cost, life, and depreciation to date.
- Useful Life: The number of periods a fixed asset is expected to serve the business.
- Fixed Assets: Long-lived physical assets used to run the business rather than resold.
- Capitalization Policy: The written dollar threshold and rules for recording a purchase as an asset instead of an expense.
- Accumulated Depreciation: The contra-asset account holding all depreciation taken on assets to date.
- Generally Accepted Accounting Principles: The common US rules for how financial statements are prepared.