How many years do you depreciate construction equipment?

There's an important distinction here: how many years you depreciate construction equipment depends on whether you're following IRS tax rules or your own accounting estimate of useful life, and these two numbers often differ.

For tax purposes (MACRS): Most construction equipment falls into the 5-year property class under the Modified Accelerated Cost Recovery System, though certain equipment types are classified as 7-year property. The specific recovery period depends on how the IRS categorizes that asset, and depreciation begins when the equipment is placed in service, not when it was purchased.

For accounting or internal purposes: If you're using straight-line depreciation on your financial books rather than tax schedules, useful life is an estimate set by your business based on expected years of service, which can run longer than the IRS recovery period since it reflects how long the machine actually stays productive, not a tax formula.

Why this matters for a valuation. Depreciation schedules are an accounting concept and are not the same as fair market value. An excavator fully depreciated on the books for tax purposes can still have significant resale value, and a heavy equipment appraisal determines that actual market value based on condition, comparable sales, and remaining useful life, not the depreciation schedule alone. This distinction matters for insurance claims, loan collateral, and estate settlement, where lenders and courts need the real value of the asset, not its book value.

If you're trying to establish what your equipment is actually worth today, see our guide on how to calculate the fair market value of equipment.