The initial cost of the asset.

The estimated value of the asset at the end of its useful life.

The useful life of the asset in years.

The actual units produced in the period.

The total estimated units the asset can produce over its life.

Select the IRS property class for your asset.

Half-year is most common. Mid-quarter applies if >40% of assets placed in service in Q4.

Number of months the asset is depreciated in the first year.

Your marginal tax rate to calculate tax savings from depreciation.