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In pure game theory terms, taking out insurance is always a losing proposition - by which I mean on average people who take insurance lose money on it. Simplistically the amount you get back times the percentage chance of you needing it is always less than the premium, and you know this is true because insurance companies (who are very, very good at statistics) design it to be that way. After all, they do want to make a profit.

So why do people take insurance? It's about risk. You insure your house because, even though the chance of it being destroyed is very small, if it does happen (and you are not insured) it will impact your life in a major way. You might never recover financially from a loss like that. On the other hand the downside of taking insurance is just a few hundred bucks a month, which you can almost certainly afford (at least if you are rich enough to own a house). The same is true of most people's cars, and certainly of the liability insurance for a car, which can bankrupt you faster than losing a house. For medical insurance (if you are not in a country with universal healthcare) this is even more true - in the US most bankruptcies are because of medical bills.

If you decide to insure a small item, then you are on average going to lose money on it. And if you can easily afford to replace it, then you are not reducing your risk in any significant way, so there would appear to be no point. Most people who do this either do it because the statistics are not obvious to them, or because they psychologically feel better about not 'losing money' if something bad happens, even if it is a bad thing they can easily afford, and they are psychologically OK with spending small amounts of money on something that will probably do them no good.

It's probably also worth mentioning that companies love insurance for small items because not only to they make a profit each time it is taken out, but lots of people either forget they insured something when it breaks, or they can't be bothered to make the claim, or they can't find the paperwork. The company profits in every case.

Also be aware that all 'extended warranties' that cost you money are essentially insurance, just marketed in a different way.

TLDR: Insurance will lose you money on average, and the only benefit to insuring things you can afford to replace is to make you feel better.

An insurance is a gamble with the insurance company where you bet that something bad will happen to you and they bet that everything will be fine. The insurance company decides the odds for that bet, and they do that based on detailed analysis of a huge amount of statistical data. So you are betting against the house. If an insurance would be worth it from a cost/risk assessment in the long run, then no insurance company would offer it.

There are only three cases where an insurance makes sense economically*:

• There are some circumstances the insurance company doesn't know which make your risk a lot higher than for most people (and not disclosing that fact isn't insurance fraud in this case).


• The potential damage is so high that it wouldn't just be inconvenient to pay for it, it would completely ruin you. Any emergency you can pay out of your emergency fund isn't worth insuring against.


• It's an insurance which is directly or indirectly subsidized by a 3rd party (government, employer...) making it a winning bet for both you and the insurance company.

So unless having to replace your phone out of your own pocket would be something you wouldn't be able to do or your personal lifestyle makes phone mishaps magnitudes more likely than for other people, it is likely not worth it.

Health insurance, on the other hand, is an insurance almost everyone should have if possible.

• There are many medical problems which can happen to everyone and which generate costs which greatly exceed the emergency funds of most people.


• When you need medical help, you are already in a situation where you feel extremely bad. You don't want to have an additional stress factor in form of worrying about how to pay for all the stuff the doctors do to you in order to help you.


• Being able to go to the doctor whenever you feel you should without having to consider whether or not it's worth it can fix many medical problems before they become expensive (and painful).

_{*unfortunately there are some cases where legal requirement or contractual obligations force you to get an insurance even if you don't think it makes sense economically.}

According to utility theory, one should adopt the strategy that maximizes one's expected utility. So when it comes to insurance, one needs to look at the probability of each scenario, and the utility of that scenario. For small amounts, utility and money can be treated as being close to proportional: losing $2 is about twice as bad as losing $1. But for larger amounts, it gets more complicated, and generally losing a large amount is larger loss of utility per dollar than a small loss. This is where insurance comes in: if you have a 1% chance of losing $100,000, then paying $1,100 to avoid that possibility may increase your expected utility, even though it decreases your expected money, if the loss of utility from losing $100,000 is more than 100 times the loss in utility in losing $1,100.

One method of modeling utility is to assume that it's proportional to the log of one's money. If we use the natural base, then going from $200,000 to $100,000 is a loss of 0.69 utils. If that has a 1% chance of happening, then the expected utility loss is 0.0069 Going from $200,000 to $198,900 is a loss of 0.0055 utils. So in this case, insurance increases your expected utility, since 0.0069 > 0.0055.

Now let's go through the above numbers, except with a loss of $100 instead of $100,000. Going from $200,000 to $199,900 is a loss of 0.0005 utils, so the expected loss is 0.0000050. If you have to pay $1.10 for insurance, that's a loss of 0.0000055 utils. So in this case, the insurance decreases your expected utility.

So whether insurance makes sense depends on how large a loss it is, how likely it is, how expensive the insurance is, and also personal factors such as how much money you currently have (if you have a billion dollars, the possibility of losing $100,000 isn't that big of a deal) and what your utility function/tolerance of risk is.

TLDR; If the item isn't expensive enough to be willing to put in so many hours of your time and effort, then just always skip it. If the item wouldn't cause a major financial hardship for you to replace, skip it.

The big problem with small insurances is they are in most places poorly regulated, and even when operating legally are doing so in a way that is "technically legal" but actively deceptive using small print and ridiculously time-consuming claim processes. This is a polite way of saying they are, 95%+ of the time, a total rip-off.

One example is a major retailer here in the US sold (and maybe still sells) insurance on air beds. A friend of mine bought it, thinking it was only a few dollars and air beds go bad all the time, so maybe this would be a good bet?

Naturally the air bed started leaking, and my friend asked for my help because the process didn't seem to make any sense, so I called up the company. The operator read out the exact requirements on the insurance and had trouble not laughing while doing so, because it was one of the most rediculous things I ever heard. To be covered the bed would need to be losing air through no visible rip or tear, not through a seam, and not through the inlet valve assembly.

...so how, pray tell, could any item actually be covered? One that loses air through some form of internal teleportation? They gave a small nervous laugh and said that basically, yes, that does seem like how it would need to happen.

Similarly I worked for a company that sold electronic insurance, and I got to talk to customers that did and did not get the insurance on the items to work for them. I always asked how the process went, and not a single one said that they needed to make less than 4 phone calls, usually waiting for half an hour or more each time, they kept their original receipt and sometimes even cut out the UPC code from the box, usually sent a few emails back and forth as well, and it took around 2-3 weeks to get a gift card back. And that was when the company agreed to cover the item in full.

The trick is, most people don't have that kind of free time or sheer force of will to collect on what amounts to usually under $100 of 'insurance'. I know of one single major US electronics retailer that offers a 'protection plan' that is actually worth the money and not a hassle, out of the dozens of companies with similar claims.

Another common trick is to sell insurance on an item, but it turns out the fine print says it only kicks in after the manufacturer period expires (usually 1-3 years), even if the insurance you bought was supposed to protect from things the manufacturer wouldn't cover regardless.

There are an infinite variety of clever ways these companies have developed to take advantage of people, engaging in rent-seeking behavior to increase their profits while providing no useful service to most or all of the people who buy their goods.

Add this reality together with the uncertain risk that you would need it at all, and you'll find that the vast majority of the time these things end up as losing propositions.

If the item you are looking at is considerably expensive enough to be a real burden if it has a problem - like a car, house, etc. - then you'll need to try to do some research to see if that particular option you have seems to operate in a legitimate way. Then you'll need to read the fine print, keep up with all required paperwork and documentation kept in a safe place, and if it comes to time that you need it be prepared and diligent because you will usually spend many hours on the phone and by email/website/letter to get what is owed you.

All insurance is a waste of money until you need it.

I don't spend money to insure the small stuff. Most of the time there's no problem and when there is, the replacement cost is reasonably inconsequential when you compare the insurance cost saved versus the cost of replacing the item.

Where the dividing line is between inconsequential and a painful expenditure to replace the item is a personal decison ($$$).

As a rough rule:

"Don't buy an insurance for what you can afford to get again; buy one for what you can't afford to lose."

Indeed, it's not only a question about the average cost (because statistically (and by design from insurance companies), it's never a good operation — as detailed in previous answers), but also if you can handle the event the accident happening. Because the long term doesn't matter if you're "game over" in the middle of the journey.

Note that it's not only about the cost of the tire itself, but, would you need the car to go to work, the cost of renting another car to go to work/don't work until the tire is fixed, etc.

So to answer your question, you should consider the full cost of a faulty tire (and this depends on your context), and then check if you can (or are ready to) support the consequences of this risk.

What you should also take into account, is the fact that your tire insurance can't be activated every time your tire is faulty (so you shouldn't over-estimate how likely you are to benefit from the insurance).

Plus the fact that you will not be reimbursed for all the costs of the incident: excess/deductible, sometimes the cost of having to pay upfront prior being reimbursed, the cost of your time filing up all paperwork, etc.

See also "Only Buy Insurance When You Can’t Afford the Loss".

The simple way to evaluate insurance against an event is to look at 1) the potential loss if an event occurs, and 2) the probability of an event occurring.

With medical insurance, the odds are generally irrelevant because the potential loss is enormous. Very few people can afford to cover catastrophic medical expenses out-of-pocket.

With consumer insurance (phones, tires) it's a little less clear. If you broke your phone, could you afford to replace it (or if you couldn't, would you be willing to go without?). What are the odds that your phone will get broken? Once you have those numbers, you can determine if insurance is statistically worth it.

If your phone costs $500 and insurance costs $10/month, that means that in any given year they think the odds of you needing to replace your phone is about 24% ($120/$500). It's actually a little less since they bake in some profit to their rates. If you think the odds of you needing a new phone are higher, or you would absolutely need to replace your phone and can't afford $500, then buying insurance might make sense.

However, an alternative would be to just save the amount that you would put toward insurance in case one of these events occurs. That's called self-insurance. You can actually get away with saving less that the combined insurances you're offered, since the odds of multiple events happening are much lower. So if you save $50/month, and in one year have $600, then you can afford to either replace your phone or tires, but maybe not both. But the odds of both happening are much smaller. Plus if neither event happens, you don't need to save any more.

The example of a phone is great. We have 3 phones in our family. Say $800 each. And the $10/mo per phone insurance. $30/mo just for the insurance. 90% of claims are for cracked screens. If I set aside the $30, we could crack a screen every 3 months and avoid talking to the insurance department of our provider. I told my wife and daughter if they manage to do more than a screen crack, I’ll give them back a prior model, and 10 mo penalty box. Then we get another new phone.

Given the nature of the question, I’d suggest finding a decent credit card with accident protection included as a perk. It will extend the seller coverage by up to a year. For many electronics, the full 2 years takes you the time when the value is 1/2 original cost anyway.

The very short answer is: No, small insurances are not worth it. The reason is called the calibration theorem.

If you accept a sure loss to remove a small risk (which is exactly what a cell phone insurance is), then under standard assumptions on rational behavior over gambles (von Neumann Morgenstern expected utility maximization), you will be committed to also reject huge potential profits for a medium risk. Think about drawing a curve that represents how much you value every dollar, every cent in terms of utility. This is what expected utility maximization tells you to do. If you make the function concave, you will be risk averse and in some cases want to buy insurance. The issue is that locally, this function will still be almost flat. But if the curve is approximately flat, you are approximately risk neutral and will therefore reject insurances over small risks.

One aspect of some "small insurances" that I haven't yet seen mentioned is that certain kinds of insurance may provide one with advantages beyond the monetary value of the payout, although some of these may not be worth as much as they once were. For example, if someone who gets an unrepairable flat in an unfamiliar area is a member of a roadside-assistance plan, they would be able to call the phone number for the plan and immediately have a reliable service crew dispatched to them. In the days before people routinely had pocket web browsers, someone who was signed up with a plan could have help dispatched to them while someone who wasn't on the plan would still be trying to figure out who to call.

Finding towing service in a remote area is probably easier now in the days of pocket web browsers than it had been previously, but for people who are often victims of "choice paralysis" the peace of mind from knowing that they can just call one number and not have to worry about choosing a towing operator may be worth the cost of the insurance, whether or not towing fees would cause any particular hardship.

The general answer to any "is it worth it" insurance question is "no," because the insurance company is making a profit on the insurance. However, that does not mean that insurance is always a bad idea or that insurance companies are cheating their customers.

When you buy any product from a business, that business is making a profit. And there is nothing wrong with that at all. They are providing a service and should be compensated for their efforts.

Insurance companies also provide a service, but unlike other types of businesses, their product is monetary. You pay them money now, and they might pay you money later. If they pay you more money then you spent, you came out ahead, and if you spend more money then they give you, it was a loss for you.

In order for the insurance company to make a profit, they need to bring in more money than they pay out. In fact, they need to bring in a lot more money then they pay out, because in addition to their profit, they have all the overhead of running a business.

As a result, on average, you will come out behind when you purchase insurance. This means that when you are on the fence about whether or not to purchase any insurance product, the default choice should be "no." On average, you are financially better off without insurance.

Now, that doesn't mean you should never buy insurance. Insurance companies spread risk across all of their customers. If I am in a situation where I have a risk of financial ruin in a certain circumstance, I can eliminate that risk by purchasing insurance. For example, I have term life insurance, because if I were to pass away, it would be financially catastrophic for my family. (I'm hoping that the insurance company makes 100% profit on that deal!) I also continue to buy expensive health insurance because an unexpected medical event would be financially devastating. However, I always decline the extended warranty when I buy a $300 appliance, because I don't have any trouble coming up with another $300 in the unlikely event that it breaks, and I would rather keep the money than contribute to the profits of an insurance company unnecessarily.

To decide if you want the insurance, you need to figure out how much you can afford to pay if something happens, how much they cover, and how badly you want to transfer your risk to them.

For small things like phone insurance, tire insurance, or other extended warranties, you need to decide how much trouble you would be in if you needed to replace the item you are insuring. If it would be terribly difficult for you financially to replace a phone that gets damaged, you could get the phone insurance. However, you need to keep in mind that it will most likely be costing you money, not saving you money. A better plan is to build up an emergency fund that can cover things like this, so that if you do happen to take your phone swimming you can afford to replace it.

_{Note: This answer is adapted from my answer on another question.}

As others have mentioned, insurance is geared toward risk aversion, and is best calculated in utility units.

Most rational adults choose to take insurance (consciously or otherwise) on a combination of relative utility of money versus relative risk aversion. Risk is 2 part in that it takes into account both the anticipation of a negative event (hereafter probability) versus the magnitude of that same event. Dropping my smartphone and totaling my car seem to be roughly similar in probability, but the magnitude of the events are vastly different (1k USD versus 6k USD replacement for the car, with a loss in utility for having a crappier car).

The biggest utility drop, however, happens when a negative event pushes your finances into insolvency, so it's a non-linear curve, with a 'kink' in it. The utility of the top 25% of my income is less than half of the utility of the second 25%, because losing more than 25% of my income would eat into savings as opposed to disposable income. The third 25% can be considered to hold all the remaining utility value, as even keeping the bottom 25% would not allow me to meet all my financial obligations for any serious period of time (therefore pushing me into bankruptcy or at least serious debt).

Therefore, assuming the insurance is the same percentage cost of the object be insured, and the negative event probability is identical, the value of insurance increases with the value of the item at a greater than 1:1 rate. replacing a $1000 phone is less harmful than replacing a $30000 car, and since I can afford the first and not the second, I may be inclined to forgo phone insurance and elect auto insurance, even if the auto insurance is a worse deal.

Additionally, 90+% of extended warranty/insurance plans cost more than they are likely to pay out. You are purchasing peace of mind and security against risk at a higher cost than replacement cost specifically because it allows you to pay that replacement cost incrementally. Spending $1000 10 months in the future is better than Spending $110 a month for 10 months, unless you need that $1000 before the 10 months are through.

Insurance is a financial tool/product. You are buying a transfer of financial liability.

Generally speaking no matter what's being insured, if you have the financial means to self-insure, that's what you should do. If you're a billionaire, you don't need most insurance.

There are situations where the low level consumer type specific product lines of coverage are priced below their value particularly because there is no underwriting. Are you clumsy and work in a tough environment where you routinely drop your overly delicate cell phone breaking the screen? Yes? Then maybe the $84 per year insurance is worth it for you.

Is insurance always a bad deal? No. Does it matter that the sales person makes 50% of the cost in commission? No. It matters that you break your screen every 6 months, screens cost $150, there's no underwriting and the insurance costs $7 a month.

I'd rather put the $7 monthly insurance premium in to my own savings account and deal with the broken screen if it happens. As an aside, this is kind of the point of your emergency fund. You self insure some of these risks.