Casco is voluntary cover for your own car: it pays out if the vehicle is damaged in a collision, stolen, battered by hail, or has its windscreen broken – regardless of who is at fault. This is the key difference from MTPL, and it's the starting point for understanding everything else.
Because MTPL never protects your own car. If you cause an accident, your MTPL settles the other party's damage – repairing your own car comes out of your own pocket. If hail hits, if an unknown culprit scratches it in a car park, if it's stolen: none of these have an "other party" whose MTPL would pay. You either cover your own car's risk from savings, or hand it over to an insurer with casco – that's the essence of the casco vs MTPL question.
Comprehensive casco rests on four covers: collision damage (crashes, collisions, parking damage, vandalism), theft and robbery, natural perils (storm, hail, flood, fire) and glass damage. On top of these sit the extras: luggage cover, a replacement car during repairs, assistance, and for new cars, GAP-style value protection. The exact scope varies by insurer – the same word can mean different things in two policies, which is why comparisons need to go by content.
Three settings. The deductible decides how much of the claim stays with you – typically a percentage plus a minimum amount together. The depreciation rule decides which parts the insurer deducts value from due to age. The exclusions decide what the cover doesn't reach at all. Two offers with a similar premium can genuinely differ on these three points – this is where everything is decided at claim time.
An honest question deserves an honest answer: casco isn't worthwhile for everyone. For a new or higher-value car, financed cars, or daily use, there are strong arguments for it; for an older, low-value car, partial casco or deliberately self-insuring may be the rational choice. A separate article covers this: who should get casco and who shouldn't – no pressure to run the numbers.
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