The depreciation curve
A typical new vehicle loses 20-25% of its value in year 1 and 45-55% by year 5. EVs depreciate harder in years 1-3 (often 50%+ by year 3) due to rapid technology cycles. Trucks and body-on-frame SUVs hold value best. This is why a 2-3 year old CPO of the same model often costs 30-40% less than new while being functionally identical.
When new wins
Buyer keeps the car 8+ years (full new-car warranty is fully utilized), EV buyer eligible for the $7,500 credit, buyer needs latest active safety (auto emergency braking, lane keeping, blind spot — these jump generations every 2-3 years), or financing rates are subsidized below used-car rates.
When CPO wins
Buyer wants a 2-5 year old vehicle and the manufacturer warranty extension, the model has expensive out-of-warranty repairs (German luxury, anything with adaptive air suspension, complex hybrids), or buyer wants captive-financing rates that are usually subsidized for CPO.
When non-certified used wins
Buyer can read a pre-purchase inspection report (or hire a $150 inspection), is buying a known-reliable model (most Toyotas, Hondas, Mazdas under 100K miles), or is paying cash and does not need the extended warranty premium. Skip CPO premium on a 2019 Camry — base reliability is the warranty.
Insurance and registration costs
Comprehensive and collision insurance scales with vehicle value — a $40K new car costs roughly 60% more to insure than a $20K used version of the same model. Registration in many states is also value-based, declining each year.