Here are the depreciation tables Sound Transit uses for RTA.
Taxable value is based on vehicles age (year of service) and a base value established by the vehicle Manufacturer’s Suggested Retail Price (MSRP) for passenger vehicles, motorcycles, light-duty trucks (scale weight of 6,000 pounds or less) and small trailers.
For passenger vehicles, motorcycles, light-duty trucks, and small trailers: Take the vehicle’s MSRP, find the Year of Service (current calendar year - model year + 1 year = year of service), and apply the corresponding percentage.
|Year of Service||Percentage|
|13 or older||10%|