Property Depreciation Calculator

When depreciating assets, the cost of acquiring buildings and equipment is not recorded as a one-time expense but spread out over the years in which it generates income. This tool supports four different accounting methods and shows the depreciation for the first year, the depreciable amount, the book value, and a detailed depreciation table for each year.

It can be used for rental properties, commercial buildings and industrial plants. Land is never depreciated and therefore must be calculated separately. The depreciable basis amount is the amount that results when the value of the land is subtracted from the cost of acquisition.

What does depreciation mean?

Depreciation is the loss of value of an asset due to age or use. In accounting and taxation, the acquisition cost of an asset is spread over its useful life so that a reasonable portion of the cost flows into each year's income.

The total depreciation amount, i.e. the depreciable amount, is calculated from the acquisition costs minus the residual value and then the value of the land is deducted. Regardless of the method chosen, the ultimately deductible amount is always the same. The difference lies in the timing of distribution. With linear depreciation, the same amounts are recorded annually, whereas with accelerated depreciation higher amounts are deducted in the first years.

The four methods are:

The straight-line method of depreciation spreads out costs evenly and is applied to real estate because there is no residual value.

For a rental property with a depreciable basis of $200,000 and a useful life of 27.5 years, the annual depreciation would be approximately $7,272.73, calculated by dividing $200,000 by 27.5.

The declining balance depreciation method applies a fixed percentage to the remaining book value each year, resulting in decreasing depreciation amounts over time. The depreciation rate is determined by the factor. 2 represents double-declining balance depreciation while 1.5 represents another type of declining balance depreciation. The calculation follows this formula:

For an asset with a cost of $10,000, a useful life of five years and a factor of two, the depreciation rate is 40 percent, calculated by dividing 2 by 5. The first year's depreciation would be $4,000, calculated by multiplying $10,000 by .40. Depreciation stops once the book value reaches the salvage value.

The sum-of-the-years'-digits method is another accelerated depreciation method. It weights the annual depreciation amounts based on the ratio of remaining useful life to the sum of all years:

For an asset with the same $10,000 cost, a $1,000 salvage value and a five-year useful life, the sum of years is 15. In year one, 5 is divided by 15 and then multiplied by $9,000, which equals $3,000.

The production cost method ties depreciation to the number of units produced rather than time. First, the depreciable amount is divided by the total number of units that the asset will produce and then multiplied by the number of units produced in the current period. The calculation follows this formula:

How to use this calculator:

Select a method and enter the acquisition cost, residual value, and useful life of the asset. For real estate, enter the land value in a special field and leave the residual value at zero. For declining balance, set a factor. For production-costs method, enter the number of units produced during the current period as well as the total number of units over the entire useful life.

The results area shows the depreciation for year one, the depreciable amount, the carrying value after one year and the depreciation rate. The table below lists the opening carrying amount, depreciation, accumulated depreciation and closing carrying amount for each year.

Depreciation of rental properties and commercial real estate:

The depreciation period for residential rental properties in the US is 27.5 years while it's 39 years for commercial real estate, both methods using straight-line depreciation. Since only the building and not the land is depreciated, a breakdown of costs and a simple valuation of the land are important to calculate the basis.

Depreciation begins when an item is put into service, i.e., it's ready to operate and be rented out, not at the date of purchase. Improvements such as a new roof must be depreciated separately while repair costs are expensed in the year they're paid.

There can be problems with sales. When an asset is sold, the IRS may assess a tax of up to 25 percent on the depreciation claimed. This is a recapture of the depreciation amounts. With a 1031 exchange, capital gains taxes and depreciation recapture taxes are deferred by reinvesting the gain in a similar property.

The table below shows each input point and what it means.

Tips for a meaningful estimate:

Allocate a reasonable percentage to buildings and land. The higher the percentage of land, the lower the deductible amount. The method is adapted to each type of asset. For buildings, linear depreciation is used, while for assets whose value drops rapidly immediately after purchase, an accelerated depreciation method is applied. The residual value should be realistic and usually zero for real estate, as all acquisition costs are depreciated.

This tool is for general educational and planning purposes only, and does not constitute tax or accounting advice. Tax laws, depreciation periods, and practices are subject to change and depend on individual circumstances. Consult a qualified accountant or tax advisor before filing.