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HP 12c Financial Calculator - Depreciation

Depreciation
Depreciation (Latin 'Depretium': 'decline in price' or 'value') is an accounting term that may be defined as the permanent and continuing diminution in the quality, quantity or the value of an asset over time. This is due to many reasons, from deterioration and obsolescence to impending retirement. It applies particularly to physical assets like equipment and structures. In industry, for accounting purposes, depreciation is also a method of deducting the cost of business property related to capital assets as they wear out, lose value, or become obsolete in order to recover their cost as a business expense. A capital asset can be a piece of equipment, a building or a vehicle expected to be used for several years. The purchase price of the asset on the purchase date is called book value.
Depreciation on the HP 12c
There are mathematical tools that calculate the depreciation of assets, and the HP 12c has functions that allow three different approaches: straight-line depreciation (), depreciation using declining balance () and depreciation using sum of the years digits (). These functions can be used to directly calculate depreciation or as part of a program or more complex calculations. The expressions used by the HP 12c to calculate depreciation with these functions are:
Figure : Expressions for calculating depreciation
Where:
Term
Description
L
Asset's useful life expectancy
SBV
Starting book value
SAL
Salvage value
FACT
Declining balance factor expressed as a percentage
j
Period number
DPNj
Depreciation expense during period j
RDVj
Remaining depreciable value at the end of period j;
RDVj = RDVj-1 − DPNj
where RDV0= SBV − SAL
RBVj
Remaining book value;
RBVj = RBVj-1 − DPNj
where RBV0 = SBV
Y1
Number of months in the partial first year.
The HP 12c calculates depreciation with either of these three methods by using TVM registers , , and to hold the necessary data, as shown below:
Register
Contents
Salvage value of the asset
Original cost of the asset
Expected useful life of the asset (years)
Declining-balance factor ( only).
To calculate the depreciation after entering these values, key in the number of the year for which the depreciation is to be calculated and press , or . The amount of depreciation is calculated and shown in the display. To see the remaining depreciable value (book value minus salvage value) press .
Practice solving depreciation problems
Example 1
The R&D department of a crystal refinement company spent $28,000 for new equipment for the digital spectrometer lab. The expected life for this equipment is 12 years, and the salvage value is $2,500. Calculate the declining balance depreciation for the fifth and eighth years and compare the values to the straight-line fixed depreciation. Use the DB method with a 2× weight (200%) related to the SL.
Solution
Load the TVM registers with the relevant values and calculate the depreciation for the fifth and eighth years using the DB method:
Keystroke
Display
Figure : Calculating depreciation for the fifth year
Figure : Calculating depreciation for the eighth year
Keep the TVM registers with previous values and calculate the depreciation using the SL method. As the straight-line method returns the same depreciation amount for each valid period, it is enough to calculate it for the first year.
Keystroke
Display
Figure : Calculating depreciation for the first year
Answer
The amount of depreciation with 2× weighted DB method for the 5th year is $2,250.52 and $1,302.38 for the 8th year. With the same figures, the annual amount of depreciation calculated with the SL method is $2,125.
Example 2
Professional video equipment bought for $15,000 has a useful life of 8 years with a salvage value of $1,100. Using the SOYD method, find the amount of depreciation for the fourth year.
Solution
Load the TVM registers with the relevant values and calculate the SOYD depreciation for the fourth year:
Keystroke
Display
Figure : Calculating depreciation for the fourth year
Answer
The amount of depreciation for the fourth year is $1,930.56.
Practice solving partial-year depreciation problems
In most cases, the acquisition date of an asset does not coincide with the start of the fiscal or tax year. In these cases, the amounts of the first and last year's depreciation are computed as fractions of a full year's depreciation. Consider the example shown in Figure 6.
Figure : Calculating the amount of depreciation as fractions
When using the straight-line method, calculating partial-year depreciation is a matter of calculating depreciation fractions related to the calendar year, because the amount of depreciation for each depreciation year is constant. In the diagram shown in Figure 3, the amount of depreciation calculated with SL for the first calendar year is 2/3 of the amount of depreciation for a full year, and for the fourth calendar year it is just 1/3 of it.
When using either DB or SOYD depreciation method, the depreciation fractions are the ones reflected by the fractions of the depreciation years. The relationship between the calendar year and the depreciation year in the example shown in Figure 6 for DB and SOYD depreciation methods is shown in the table below:
Figure : Relationship between calendar year and depreciation year
Example 3
Using the same video equipment from the previous example, calculate the amount of depreciation of the fourth year using SOYD, but now assume that the equipment was bought in February.
Figure : Calculating partial depreciation
Solution
The diagram in Figure 8 helps building the solution. The fourth year is calculated by adding 1/12 of the third depreciation year to 11/12 of the fourth depreciation year. If data from previous example has not been changed yet, the following keystroke sequence can be used:
Keystroke
Display
Figure : Calculating depreciation amount for 1/12 of the third year
This is the depreciation amount for 1/12 of the 3rd year, and it is stored in R0. Now calculate 11/12 of the fourth depreciation year, add it to R0 and retrieve the accumulated value:
Keystroke
Display
Figure : Calculating the amount of depreciation for the fourth year
Answer
The amount of depreciation for the fourth year is $1,962.74 given that the first depreciation year was only 11 months long.
Additional information
The HP 12c Owner's Handbook and Problem Solving Guide , Part III Section 13, under Investment Analysis, has many examples on how to use programs with depreciation functions in more complex depreciation situations.

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