Updated August 3, 2026. Quick answer: drop collision when the annual premium for it approaches roughly a tenth of what the insurer would actually pay you for the car. That is the whole calculation, and the number that matters is the car’s actual cash value minus your deductible — not what the car is worth to you.
The arithmetic
Collision pays the actual cash value of the vehicle, less the deductible, and never more. So the most the cover can ever return is:
Maximum possible payout = actual cash value − deductible
On a car the insurer values at $4,000 with a $1,000 deductible, the most collision can ever pay is $3,000 — and only in a total loss that is your fault. If collision costs $300 a year, you are paying a tenth of the maximum payout, annually, for a payout you may never claim.
The deductible is doing more work than people expect. Raising it to reduce the premium also reduces the maximum payout, so on an old car a high deductible and collision cover together can approach paying for nothing.
What you must not drop
Collision and comprehensive cover your car. Liability covers what you do to other people, and it is unaffected by the age of your vehicle. A twenty-year-old car can cause exactly as much injury and damage as a new one, and liability is where the ruinous numbers live.
So the retiree move is usually the opposite of trimming everything: drop collision on the old car and put part of the saving into higher liability limits, which are cheap per dollar of protection. Umbrella cover sits on top of those limits and does nothing if the underlying limits are too low.
When keeping it is right anyway
- You could not replace the car quickly. If losing it means not getting to medical appointments next week, the payout matters more than the arithmetic says.
- It is a newer or unusually valuable vehicle. The ratio simply is not there yet.
- You would not otherwise save the money. The case for dropping assumes the premium becomes a reserve. If it becomes spending, you have swapped cover for nothing.
Check the value, do not assume it
The number in the calculation is what the insurer would pay, which is a market valuation of your specific car in its specific condition — not a guess, and not sentimental value. Ask your insurer what they would settle a total loss at today. People consistently overestimate this for cars they like and underestimate it for cars they are bored of.
Related: the full insurance audit · where cover quietly thins.
General information drawn from the Internal Revenue Code, IRS publications, FEMA and NFIP materials and state statute, not legal, tax, financial or insurance advice. Insurance is regulated at STATE level and policy wording controls – your own policy, its endorsements and its exclusions decide what is covered, and no page can tell you what yours says. FEMA and NFIP figures change and every figure here is year-labelled with its source named. We are not an insurer, an agent, a broker or a public adjuster, and we sell nothing on these pages.