Tax Depreciation Explainer
Tax depreciation is the deduction allowed for the cost of eligible property over tax-prescribed periods and methods. It begins with tax basis, which can include purchase price and certain costs to place the asset in service, then applies rules based on asset class, use, and jurisdiction.
Tax schedules may accelerate deductions compared with straight-line financial reporting. Faster deductions reduce taxable income and cash taxes earlier, creating a timing benefit and often a deferred tax liability. They do not make the asset free; the deductions are used sooner and may be smaller later.
Special elections, expensing provisions, limitations, listed-property rules, and business-use changes can alter the result. Selling an asset may trigger gain and depreciation recapture, so the future tax effect depends on proceeds and remaining tax basis rather than book value alone.
Businesses should evaluate after-tax cash flow, maintenance, financing, and operational need before buying assets for a deduction. Tax rules change, and eligibility can be fact-specific. Financial forecasts should separate book depreciation, tax depreciation, and actual capital spending.
Eligible cost is recovered using tax-prescribed lives and methods.
Book depreciation can follow a different schedule.
Earlier deductions can reduce near-term cash tax.
Later periods then have less remaining basis to deduct.
A sale may create taxable gain or recapture.
Model the full asset life rather than only the purchase year.
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