Sound Transit uses these depreciation tables for RTA tax.
Depreciation Curve
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.
Depreciation percentage based on years of service
| Year of Service | Percentage |
|---|---|
| 1 | 100% |
| 2 | 95% |
| 3 | 89% |
| 4 | 83% |
| 5 | 74% |
| 6 | 65% |
| 7 | 57% |
| 8 | 48% |
| 9 | 40% |
| 10 | 31% |
| 11 | 22% |
| 12 | 14% |
| 13 or older | 10% |
