2025 Schedule of Percentages Applied to Historical Costs in Estimating Value of Construction Equipment
Each depreciation percentage listed below is the result of multiplying an equipment index factor by a percent good factor. When the depreciation percentage is applied to the historical cost, it concurrently trends the historical cost to an estimate of replacement cost new and depreciates it to arrive at an estimate of present value. Any deviation from this table for unusual functional or economic obsolescence, etc., should be documented in compliance with Property Tax Rule 6 (F).
| 2024 | 74 | 91 | 83 | 93 |
| 2023 | 68 | 83 | 76 | 89 |
| 2022 | 67 | 83 | 75 | 87 |
| 2021 | 68 | 84 | 77 | 88 |
| 2020 | 66 | 81 | 74 | 82 |
| 2019 | 62 | 77 | 70 | 74 |
| 2018 | 58 | 72 | 65 | 68 |
| 2017 | 53 | 65 | 60 | 58 |
| 2016 | 49 | 60 | 55 | 50 |
| 2015 | 44 | 54 | 49 | 42 |
| 2014 | 40 | 49 | 44 | 34 |
| 2013 | 38 | 47 | 42 | 29 |
| 2012 | 36 | 43 | 40 | 24 |
| 2011 | 34 | 42 | 39 | 19 |
| 2010 | 32 | 40 | 37 | 16 |
| 2009 | 31 | 37 | 34 | |
| 2008 | 27 | 33 | 30 | |
| 2007 | 22 | 29 | 26 | |
| 2006 | 21 | 23 | 23 | |
| 2005 | 20 | 20 | 20 | |
| 2004 | | 17 | | |
| 2003 | | | | |
| 2002 | | | | |
| 2001 | | | | |
| 2000 | | | | |
| 1999 | | | | |
| 1998 | | | | |
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| 1996 | | | |
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