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Sum of Years Depreciation (SYD)

An alternative accelerated depreciation method

Written by

Tim Vipond

Published September 11, 2023

Updated July 7, 2023

What is Sum of Years Depreciation (SYD)?

Sum of Years Depreciation (SYD) is a method of accelerated depreciation. Similar to the double declining balance method, sum of years depreciation aims to depreciate a company’s assets at an accelerated rate. Companies may choose the SYD method as the practice will result in a larger depreciation tax shield in the first few years of the asset’s life.

Organizations that face difficult tax environments may choose to depreciate their assets in an accelerated way in order to realize larger tax savings and benefit from the resulting understated net income figure shown on the company’s financial statements in the first few years of owning the assets. In later years, when the depreciation amount is smaller, the net income will be overstated.

How It Works

The sum of years depreciation method works by depreciating the asset’s depreciable amount by a depreciation factor unique to each year. The depreciable amount is equal to the asset’s total acquisition cost less the asset’s salvage value. The total acquisition cost refers to the total capital expenditure that the company had to undertake in order to gain possession of said assets.

The total cost would include the purchase price of the asset, any shipping costs associated with moving the asset to the company, and any installation costs. The depreciation factor is the useful life of the asset (in years) divided by the sum of all the useful years. The formula below summarizes the process:


n – Useful life of the asset (ex. 4 years)

∑n – Sum of years (e.g., 4 years: 1+2+3+4 = 10)

Depreciable amount – (Total Acquisition Cost – Salvage Value)

Sum of Years Depreciation Example

Consider coffee company Mega Coffee, which is ready to expand into its new office headquarters. The company is considering investing in the latest available computers in order to make sure that its business runs smoothly. The material cost of all the computers is $2,500,000.

However, Mega Coffee needs to pay $100,000 in shipping costs in order to move this massive order of computers across the country in due time. In addition, Mega Coffee is faced with a $400,000 installation charge to ensure that its computers are installed correctly and function at full capacity.

Mega Coffee believes that at the end of the computers’ 5-year useful life, they will be worth $200,000. The company decides to depreciate the assets using the SYD method as it faces a fairly harsh tax environment. Also, there is a high probability that the computers will become obsolete before their useful life is up. Create a depreciation schedule to model how these assets can be depreciated.


The first step is to identify the main inputs needed for this calculation. These are summarized in the table below:


Total acquisition cost – $2,500,000 + $100,000 + $400,000 = $3,000,000

Depreciable Amount – $3,000,000 – $100,000 = $2,900,000

Sum of useful years – 1+2+3+4+5 = 15

Once we have established the relevant parameters, we can calculate the depreciation expense for each year as follows:

Additional Resources

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