# How to Calculate Partial Year Depreciation

When an asset is put in service in any month other than January (or first month of a fiscal year), a business generally takes depreciation only for the months the asset was owned. To calculate the amount of depreciation, take the calculated amount for the year, divide it by 12 to get the monthly expense, and multiply that number by the number of months the asset was owned.

For example, if a business purchases an Ford F350 truck on August 1, under Straight Line depreciation, we would take the depreciation expense for the first year \$7,600, divide by 12 to get the monthly cost of \$733. Then multiply that by the number of months the asset was owned–5. The first year’s depreciation would be \$733 x 5 = \$3665.

The depreciation expense to complete the five year period would be calculated as 7 months in the sixth year of the asset’s life. Five months in the first year, 12 months in years two through five, and seven months in year six.

## What is the Journal Entry to Record Depreciation?

Whether a company records its depreciation monthly or yearly, an adjusting journal entry is made to adjust the balance of depreciation expense and to record the the loss of value of the asset in the accumulated depreciation account.

The journal entry is a debit to Depreciation Expense and a credit to the contra asset Accumulated Depreciation. In this case, we’ll assume the asset has \$2,000 a year in depreciation (straight-line)

When the entry is posted to the accounts, Depreciation Expense has increased and Accumulated Depreciation has increased. The new Accumulated Depreciation total then moves to the Balance Sheet where it shows the total reduction in the assets value from the time the asset was purchase. The Depreciation Expense is accumulating, adding up over time.

Assuming that the asset in question has a 5 year useful life and the company uses Straight Line Depreciation, the next year’s entry will be:

The new Accumulated Depreciation amount will be \$2,000 + \$2,000 = \$4,000. The Balance Sheet will now show this:

The Depreciation has Accumulated to \$4,000. The Net Book Value of the asset is now \$6,000. Notice we haven’t touched the original (historic) cost of the asset. We are tracking the loss in value using the Accumulated Depreciation contra asset account.

For more how-to tips about calculating depreciation, check out these articles:

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