If you're weighing a used Cadillac CT5, or wondering what yours is worth, here's the short version: the average depreciation number hides a big split between trims. Knowing which side of that split your car sits on is what matters.
Per Slashgear, estimates suggest the CT5 loses about 40 to 42 percent of its value over five years. That's roughly in line with the broader car market, and better than the typical mid-size luxury car. But Slashgear also notes the figure may be propped up by the high-performance CT5-V Blackwing, which holds value far better than the rest of the lineup.
The Headline Number: About 40% in Five Years
A 40 to 42 percent loss over five years sounds steep, but context helps. Luxury cars have a reputation for punishing first owners, and the CT5 manages to land at the market average and ahead of many of its mid-size luxury rivals.
That's the good news. The caveat is that an average blends very different cars together. A number lifted by one standout trim tells you less about the car you're actually considering.
A Tale of Two CT5s
This is the core of the story. Depreciation varies dramatically by trim, and performance variants like the CT5-V Blackwing hold value far better than base models.
What that means in practice:
- Base and lower trims: Expect them to track closer to, or worse than, the 40 percent average once you account for the Blackwing pulling the overall figure up.
- CT5-V Blackwing: Slashgear's reporting points to far better retention, with the high-performance sedan standing apart from the pack.
The takeaway is simple. If you read "40 percent" and assume your base-trim CT5 will behave that way, you may be too optimistic. The headline figure is flattered by its best performer.
Why Sedans Face Headwinds
The market context matters here. Cadillac is discontinuing both the CT4 and CT5 sedans after 2026, as the luxury market shifts toward SUVs.
My read, and it's only analysis: a discontinued sedan in an SUV-dominated market has a smaller pool of future buyers. That tends to put pressure on mainstream trims. Performance models are different because enthusiasts, not family shoppers, set their prices. Buyers who want a V-series sedan have fewer new options, which is a plausible reason the Blackwing stands out. Slashgear's estimates don't spell out that causal link, so treat it as informed reasoning, not confirmed fact.
What This Means If You're Buying Used
Practical guidance based on the reported split:
Shopping for a base-model CT5
You're buying into a car that has historically depreciated roughly with the market, and possibly more steeply than the blended figure suggests. That's actually your advantage: a used example lets the first owner absorb the biggest hit. Negotiate with the discontinuation in mind, and don't pay a premium assuming it will hold value.
Shopping for a CT5-V Blackwing
Expect to pay up, because the market already recognizes its strength. The upside is that you're buying the trim best positioned to retain value. Whether it becomes a modern classic is speculation, but the retention numbers are the reason the idea gets floated.
Shopping in between
We don't have trim-by-trim figures for the middle of the lineup, so don't assume. Compare actual local listings for the specific trim and model year, and check how long similar cars sit before selling.
What This Means If You Already Own One
If you drive a base or lower-trim CT5, plan around the full 40 percent or so over five years, and don't count on a Blackwing-style outcome. If resale matters to you, selling before the discontinuation fully shakes out in used pricing is a judgment call worth weighing, though no source here predicts how prices will move.
If you own a Blackwing, the reported pattern is in your favor. Keep service records and condition pristine, since buyers in this segment tend to be particular.
The Bottom Line
Don't shop on the average. Before you buy or sell any CT5, look up what your exact trim is bringing in current listings, and treat the 40 percent figure as a ceiling for the Blackwing's story, not a promise for every car on the lot.
