Do You Really Need Full Coverage on an Old Car? Probably Not.

The Misconception: Full Coverage Is Always Worth It

There’s a widespread belief that as long as a car is financed, you must carry “full coverage” — collision and comprehensive — no matter what. That’s wrong. The real question isn’t what the lender demands; it’s what the car is worth. Once your car’s actual cash value drops below a certain threshold, paying premiums for collision and comprehensive is mathematically foolish. We’re going to walk through the decision with real numbers, because this is a decision you should make with your wallet, not your emotions.

What “Full Coverage” Actually Buys You

Let’s start with the basics. Auto insurance liability coverage pays for damage or injury you cause to others — that’s the legally required part. Collision covers your own vehicle in a crash, and comprehensive covers non-collision damage like theft, fire, and hail (Investopedia). So “full coverage” typically means liability plus collision plus comprehensive. The catch? Collision and comprehensive are subject to a deductible — the amount you pay out of pocket before the insurer pays. Deductibles are typically $500 or $1,000, and the higher the deductible, the lower the premium (III — How Much Auto Coverage).

The Math: When It Stops Making Sense

Here’s the rule we use in the field: if your annual collision and comprehensive premium is more than 10% of your car’s actual cash value, drop them. Say you drive a 2013 sedan worth $3,000. If you’re paying $600 a year for collision and comprehensive combined, that’s 20% of the car’s value. Over two years, you’ll pay $1,200 in premiums — nearly half the car’s worth. And if you file a claim, you’ll still pay a $500 or $1,000 deductible (III — How Much Auto Coverage). The insurer will only pay up to the car’s actual cash value, minus the deductible. So on a $3,000 car, a $1,000 deductible means you’re only getting $2,000 from the insurer — but you’ve already paid $1,200 in premiums. That’s a losing bet.

But Wait, What About the Uninsured Driver Risk?

You might argue, “But if I drop collision, what if an uninsured driver hits me?” That’s a valid concern — the estimated percentage of uninsured drivers in the U.S. is close to 13 percent (III — Compulsory Auto Insurance). However, uninsured motorist coverage (UM) is separate from collision. UM pays for your injuries and, in some states, property damage when the at-fault driver has no insurance. It doesn’t cover your own car’s damage caused by a covered collision if you don’t have collision. So if you drop collision, you’re accepting the risk that an uninsured driver could total your old car and you’d get nothing for it. But that risk is already priced into your decision: if the car is worth only $3,000, the worst case is you lose $3,000. In contrast, keeping collision could cost you $600 a year indefinitely.

Our Recommendation: Run the Numbers Every Two Years

Here’s the practical approach. Every two years, get the actual cash value of your car (from a source like Kelley Blue Book). Then get a quote for collision and comprehensive with a $1,000 deductible (III — How Much Auto Coverage). If the annual premium is more than 10% of the car’s value, drop those coverages and pocket the savings. Put that money into an emergency fund for car repairs. For example, a $500 annual premium on a $5,000 car is 10% — borderline. On a $3,000 car, $500 is 16.7% — drop it. This isn’t about being cheap; it’s about being rational. Remember, liability coverage is still legally required in virtually all states (New Hampshire is the exception) (III — Compulsory Auto Insurance). So keep liability, but don’t over-insure a depreciating asset.

The Takeaway

Full coverage on an old car is often a waste of money. The moment your collision and comprehensive premiums exceed 10% of your car’s value, you’re better off dropping them and self-insuring the risk. Run the numbers, not your emotions.

Sources

• III — How Much Auto Coverage - https://www.iii.org/article/how-much-auto-coverage-do-i-need
• III — Compulsory Auto Insurance - https://www.iii.org/article/background-on-compulsory-auto-uninsured-motorists
• Investopedia - https://www.investopedia.com/terms/i/insurance.asp