This free online depreciation calculator will calculate the rate and expense amount for a personal or real property for a given year based on the Modified Accelerated Cost Recovery method as described in Chapter 4 of IRS Publication 946  How To Depreciate Property.
Plus, the calculator also gives you the option to include a yearbyyear depreciation schedule in the results  along with a button to open the schedule in a printer friendly window.
Note that if you would like an answer to "What is Depreciation?", or you would like to learn about and/or calculate straight line depreciation, please visit the SLD Calculator.
Or if you would like to learn about and/or calculate Double Declining Balance depreciation, please visit the DDB Calculator.
MACRS is an acronym for Modified Accelerated Cost Recovery System, which is the name given to the system created by the Internal Revenue Service to standardize the depreciation of property acquired for business use. Standardize? Maybe. Simplify? The total opposite.
I'll be honest with you, in the days spent researching the formulas needed to create the MACRS calculator I couldn't help but be totally amazed at how a bureaucratic agency can take an otherwise simple expense formula and complicate it so thoroughly that it takes a 119page document to explain it. Unbelievable!
You can't.
On most of my calculator pages you will find that I attempt to cover all of the bases for those wanting to learn how to manually calculate the results the calculator was designed for. However, thanks to the IRS and their ruling factions, I'm sorry to report that the calculator on this page is an exception.
In the case of this calculator, all I can offer is a summary of the parts of the publication that are applicable to the typical small business. If you own a farm, a speedway, an energy company, or any of the other 100+ nontypical types of businesses, and want to know exactly what your depreciation expense is, you may need to either hire a tax lawyer, or spend a week studying the Publication 946  depending on what type of business you are engaged in and on whether or not you have an infallible, photographic memory.
In order to calculate MACRS depreciation you will need to determine five different variables that make up the formula. I will try to summarize each as they relate to the typical business.
Basis is the cost to acquire the property (price, sales tax, etc.), less any land that was included in the acquisition cost, less the percentage the property will be used for personal use. Note that since MACRS fully depreciates property, salvage value is not used to adjust the basis.
A property's classification determines which depreciation method you can use, as well as its allowable cost recovery period.
At last count Table B1 in IRS publication 946 lists 13 different classes of property. However, before you can make a final decision as to your property's recovery period, you must first read through more than 120 different activity classifications listed in Table B2 to see if the activity the property is used for overrides the recovery period as stated in Table B1.
While there are 9 different recovery periods (3, 5, 7, 10, 15, 20, 25, 27.5, and 39 years), most businesses property falls into the 5, 7, 27.5, or 39 year recovery period. The allowable recovery period for a specific property depends on which classification you decide it belongs in.
Depending on what type of property you are depreciating, you may have the option of choosing either the declining balance method or the straight line method. If you are depreciating real property you have no choice but to use the straight line method.
Furthermore, if using a declining balance method, at the point in the recovery period where it becomes more advantageous to use the straightline method, the depreciation schedule switches to the straightline method for the remainder of the recovery period. After all, if you never switched to the straightline method you would never be able to fully depreciate the property.
Convention is the term used by the IRS to describe what percentage of the property cost can be recovered the first year an asset is placed in service. This percentage depends on which of the three following conventions the property falls into:
That is just a brief summary of the five variables that need to be determined in order to calculate depreciation using the MACRS method.
Once you have solved for the 5 dependent variables, the next step in figuring a property's allowable depreciation expense is to use Charts 13 (Appendix A in IRS Publication 946) to determine which percentage table to refer to in order to look up the percentage needed for the applicable recovery year.
Next, once you know which percentage table to use, you then find that table and crossreference the recovery year (lefthand column) with the recovery period (top row). The table cell where the intersection of the cross reference occurs will list the percentage figure needed to calculate the property's depreciation expense for the applicable tax year.
Finally, you multiply the property's basis by the percentage figure to arrive at the property's depreciation expense for the year.
To illustrate how to figure depreciation using the MACRS depreciation method and tables, suppose you purchased an office desk at a total cost of $800.00 and placed the desk in service on April 15th of 2014.
Further suppose you want to calculate the desk's depreciation expense for the 2015 tax year. Here are the steps to arriving at the answer:
Here is the depreciation schedule for the above example, as generated by the MACRS Depreciation Calculator located on this page:
Desk Depreciation Schedule  
#  Year  Basis  %  Depreciation Expense 
Accumulated Depreciation 
Ending Book Value 
M 
1  2014  $800  14.286%  $114  $114  $686  DB 
2  2015  $800  24.490%  $196  $310  $490  DB 
3  2016  $800  17.493%  $140  $450  $350  DB 
4  2017  $800  12.495%  $100  $550  $250  DB 
5  2018  $800  8.925%  $71  $622  $178  SL 
6  2019  $800  8.925%  $71  $693  $107  SL 
7  2020  $800  8.925%  $71  $764  $36  SL 
8  2021  $800  4.462%  $36  $800  $0  SL 
Note that since the declining balance (DB) depreciation for year 2018 ($71) would be less than or equal to the straight line (SL) depreciation ($71), straight line depreciation is used for year 2018 as well as the remainder of the recovery period  as indicated in the "M" (Method) column.
Due to the complex and everchanging nature of depreciation tax laws, please consider the results of the MACRS Depreciation Calculator to be for illustrative purposes only.
In other words, be sure to consult a qualified tax professional and/or IRS Publication 946 before completing your depreciationrelated tax forms.
With that, let's use the MACRS Depreciation Calculator to calculate a property's depreciation rate and expense for a given tax year based on Chapter 4 of IRS Publication 946.

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