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Insurance of any kind is always going to have a lower expected value than self-insuring. If there's a 10% chance of a loss of ₹100 occurring, insurance companies will charge more than ₹10, to cover their overheads and earn a profit. If you self-insure, you keep the profit, and eliminate the overheads.

If you can't handle the worst-case scenario, if it will cost too much relative to your assets, then you should buy insurance. End of story. This question refers only to situations in which you can comfortably handle the worst-case scenario.

In my case, instead of paying the insurance company, I invest the money. I switched from comprehensive insurance for my car to third-party. I don't buy insurance for my phone or computer when I'm offered one. And so on.

I instead invest the money, most in equity mutual funds. I'm taking a bit of risk to make a profit, and I'm comfortable with that.

But it recently struck me that I could instead take the risk in a different way. Buy the insurance, and adjust my investment portfolio towards higher risk/return than I'd otherwise choose.

In other words:

BASELINE SCENARIO: Third-party car insurance, investment portfolio consists of 80% equity and 20% debt

ALTERNATIVE SCENARIO: Comprehensive car insurance, investment portfolio consists of >80% equity and <20% debt.

In effect, I'm substituting the risk of loss from my car being destroyed for the risk of a stock market decline.

Which of these scenarios provides more returns for the same level of risk? Or, alternatively, provides the same returns with less risk? How would you quantify and analyse this?

If someone came to you and presented their portfolio of investments and insurance policies, and asked you to reduce risk in their financial life, would you do so by increasing the percentage of debt in their investments, or by buying insurance for things that they haven't insured? Would you be able to justify mathematically why your choice is better?

Here's a concrete example:

One of my family members has medical insurance for a low amount which may not even be sufficient to cover routine hospitalisation without surgery. It's also low relative to my expenses — it's just 1-2 months of expenses.

I considered discontinuing this insurance, but my financial advisor suggested I keep it, since the sum insured is 17 times the annual premium. As he put it, it's a good deal to spend ₹1 to get back ₹17 if things go wrong [1].

Is he correct? Is 17x a good deal? 40x? 7x? How do I analyse this?

Footnotes:

[1] Let's rule out the possibility of getting insurance for a higher amount, for reasons I prefer not to go into here. The question is whether the given insurance policy is worth it relative to self-insuring.

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    OK you are misunderstanding insurance. Insurance isn't used to make a profit but to guard against losses, primarily major. The premium you pay is much less than the insured amount, so I am not sure how you can profit from only the premiums.
    – DumbCoder
    Oct 12, 2016 at 10:38
  • I know how insurance works. Please click the first link in the question and read through the answers to understand why buying insurance has a negative expected value.
    – Kartick Vaddadi
    Oct 12, 2016 at 10:48
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    Did you go through it in detail or just skimmed over it ? No you don't understand insurance, hence you are making assumptions or are very vague in wording your query. The post justifies it's point properly but you have incorrectly assumed it is relevant to your query. And I didn't see any instance of how it was relevant to your current query.
    – DumbCoder
    Oct 12, 2016 at 11:45
  • I've clarified the question. Are you now able to understand my point?
    – Kartick Vaddadi
    Oct 12, 2016 at 15:50
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    It's all about whether you can afford the worst case. With medical insurance, I can't, so I insure. If you can afford the worst case, it's a question of insurance vs Investment, as the question says.
    – Kartick Vaddadi
    Oct 13, 2016 at 2:27

1 Answer 1

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You are kind of thinking of this correctly, but you will and should pay for insurance at some point. What I mean by that is that, although the insurance company is making a profit, that removing the risk for certain incidents from your life, you are still receiving a lot of value.

Things that inflict large losses in your life tend to be good insurance buys. Health, liability, long term care, long term disability and property insurance typically fall into this category.

In your case, assuming you are young and healthy, it would be a poor choice to drop the major medical health insurance. There is a small chance you will get very sick in the next 10 years or so and require the use of this insurance. A much smaller chance than what is represented by the premium. But if you do get very sick, and don't have insurance, it will probably wipe you out financially. The devastation could last the rest of your life.

You are paying to mitigate that possibility. And as you said, it's pretty low cost.

While you seem to be really good at numbers it is hard to quantify the risk avoidance. But it must be considered in your analysis.

Also along those lines is car insurance. While you may not be willing to pay for "full coverage" it's a great idea to max out your personal liability if you have sufficient assets.

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    Great points, so upvoted, but tangential to what I was trying to ask. Not your fault, since my question wasn't as clear as it could have been. I've clarified it now. Does it help? Thanks.
    – Kartick Vaddadi
    Oct 12, 2016 at 15:59
  • To me, it is still not 100% clear. The 1x to 17x comparison needs to also have a likelihood of occurrence. If there is a 25% chance of the emergency occurring then yes it is a good deal. If there is a 1% chance, then it is not a good deal. It feels like you are talking about gimmick insurance like those offered by AFLAK. Those are a poor buy.
    – Pete B.
    Oct 12, 2016 at 16:50
  • First, I agree with your points about medical, property and disability insurance. In those situations, I can't afford the worst case, so I insure. Regarding other insurance, in a competitive market, you can assume that the likelihood is roughly taken care of. I'm more focused on the magnitude of the loss, not the likelihood, since it's the magnitude that will mess up my financial situation if it were to happen. More the magnitude relative to premium, the better the deal is.
    – Kartick Vaddadi
    Oct 13, 2016 at 2:24

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