In the Sum-of-the-Years'-Digits (SYD) depreciation method, the depreciable base is calculated by considering the cost of the asset, its estimated salvage value, and its useful life. The depreciable base represents the portion of the asset's cost that will be allocated as an expense over its useful life.
To calculate the depreciable base using the SYD method, you need to follow a specific formula. The formula is as follows:
Depreciable Base = Cost of Asset - Salvage Value
The cost of the asset refers to the original purchase price or
acquisition cost of the asset. It includes all costs necessary to bring the asset into its intended use, such as transportation, installation, and legal fees.
Salvage value, also known as residual value or scrap value, represents the estimated value of the asset at the end of its useful life. It is an approximation of what the asset could be sold for or its remaining value after depreciation.
Once you have determined the cost of the asset and its salvage value, you can subtract the salvage value from the cost to obtain the depreciable base. This depreciable base is the amount that will be allocated as an expense over the asset's useful life using the SYD method.
It is important to note that in the SYD method, the depreciation expense is not allocated evenly over the useful life of the asset. Instead, it is allocated based on a fraction that changes each year. The fraction is calculated by summing the digits of the useful life and then dividing it by the remaining useful life at the beginning of each year.
For example, let's consider an asset with a cost of $10,000, a salvage value of $1,000, and a useful life of 5 years. The depreciable base would be calculated as follows:
Depreciable Base = $10,000 - $1,000
Depreciable Base = $9,000
Using the SYD method, the sum of the digits for a 5-year useful life is calculated as follows:
Sum of the digits = 5 + 4 + 3 + 2 + 1
Sum of the digits = 15
To determine the depreciation expense for each year, you divide the remaining useful life by the sum of the digits and multiply it by the depreciable base. The calculation for each year would be as follows:
Year 1: (5/15) * $9,000 = $3,000
Year 2: (4/15) * $9,000 = $2,400
Year 3: (3/15) * $9,000 = $1,800
Year 4: (2/15) * $9,000 = $1,200
Year 5: (1/15) * $9,000 = $600
By following this method, the total depreciation expense over the asset's useful life would equal the depreciable base ($9,000) calculated earlier.
In summary, the depreciable base in the Sum-of-the-Years'-Digits method is calculated by subtracting the salvage value from the cost of the asset. This depreciable base is then allocated as an expense over the asset's useful life using a changing fraction based on the sum of the digits. This method allows for a higher depreciation expense in the earlier years and a lower expense in the later years of an asset's useful life.