The Excel SYD function returns the “sum-of-years” depreciation for an asset in a given period. The calculated depreciation is based on initial asset cost, salvage value, and the number of periods over which the asset is depreciated.

**Syntax**:= SYD (cost, salvage, life, period)

The SYD function syntax has the following arguments:

**Cost**Required. The initial cost of the asset.**Salvage**Required. The value at the end of the depreciation (sometimes called the salvage value of the asset).**Life**Required. The number of periods over which the asset is depreciated (sometimes called the useful life of the asset).-
**Per**Required. The period and must use the same units as life.

**Example**: Let’s look at some Excel SYD function examples and explore how to use the SYD function as a worksheet function in Microsoft Excel:

In the example below, the SYD function uses the sum-of-years’ digits depreciation method to calculate the yearly depreciation of an asset that costs $100,000 at the start of year 1, and has a salvage value of $21,000 after 20 years.

**Syntax**: =SYD(B1,B2,B3,1)

**Result**:

Based on the Excel spreadsheet above, the following SYD examples would return:

**Syntax**: =SYD(B1,B2,B3,2)**Result**: $7,147.62

**Syntax**: =SYD(B1,B2,B3,3)**Result**: $6,771.43

**Syntax**: =SYD(B1,B2,B3,4)**Result**: $6,395.24

**Syntax**: =SYD(B1,B2,B3,5)**Result**: $6,019.05

**Syntax**: =SYD(B1,B2,B3,6)**Result**: $5,642.86

**Syntax**: =SYD(B1,B2,B3,7)**Result**: $5,266.67

**Syntax**: =SYD(B1,B2,B3,8)**Result**: $4,890.48

**Syntax**: =SYD(B1,B2,B3,9)**Result**: $4,514.29

**Syntax**: =SYD(B1,B2,B3,10)**Result**: $4,138.10

**Note**:

- We need to provide the arguments
*life*and*per*in the same units of time: days, months, or years. - #VALUE! error – Occurs when the given arguments are non-numeric.
- #NUM! error – Occurs when:
- The salvage argument provided is less than zero.
- The life or per argument given is less than or equal to zero.
- The per argument provided is greater than the life argument provided in the formula.

- SYD is calculated as follows: