Financial Glossary
Depreciation Formula
A depreciation formula is the calculation used to allocate the cost of a tangible asset over the periods it is expected to be used, rather than expensing the full cost at purchase. The most common approach, straight-line, divides the asset's cost minus its estimated salvage value by its useful life to produce a periodic depreciation expense. Accelerated methods, such as declining balance, apply a fixed rate to the asset's remaining book value so more expense is recognized in earlier years.
Problem & Application
Owner-operated businesses, STR hosts, and campground or RV-park owners buy furniture, equipment, vehicles, and improvements that wear out over time, and the depreciation formula determines how much of that cost hits the books each period. Choosing the right method affects both reported profit and taxable income, since the tax depreciation schedule can differ from the book schedule. Applying the formula consistently and tracking accumulated depreciation keeps the balance sheet and tax return aligned.
In Short
The depreciation formula turns a one-time purchase into a measured expense that matches the asset's productive life. Picking the right method and useful life is what makes the resulting numbers accurate.