---
url: /cube-functions/db.md
description: >-
  Returns depreciation of an asset for a specified period using the
  fixed-declining balance method.
---

# DB 

Returns depreciation of an asset for a specified period using the fixed-declining balance method.

```js
DB(cost, salvage, life, period, month)
```

#### Parameters

* `cost` - The initial cost of the asset.
* `salvage` - The value of the asset at the end of its useful life (salvage value).
* `life` - The total number of periods over which the asset is depreciated.
* `period` - The specific period for which to calculate depreciation.
* `month` - The number of months in the first year (1–12). Defaults to 12 if omitted. `(optional)`

#### Examples

```js
DB(1000, 100, 5, 1)

```

**Result:** `369.0`

**Note:** Returns the first-year depreciation for an asset costing 1000 with a 5-year life and 100 salvage value.

```js
DB(1000, 100, 5, 1, 9)

```

**Result:** `276.75`

**Note:** Returns the first-period depreciation when the first year includes only 9 months.

```js
DB(1000, 100, 5, 6, 9)

```

**Result:** `10.58`

**Note:** Returns the depreciation for the final (sixth) partial period when the first year includes 9 months.