I'll respond to a bunch of this stuff.
First of all, in general, when a young, healthy person is trying to figure out their need, they might as well buy more than what they think that they need. This is because the price difference of the premium is an immaterial dollar amount, but the death benefit has a huge material difference.
What I mean is that for a healthy 25 year old male to increase his coverage by $500,000, and it doesn't really matter if we are going from $500,000 to $1,000,000 or $1,000,000 to $1,5000,000, etc., the premium on a 20 year term policy will only increase by about $13/month. You are looking at about $2.50 per $100,000 of additional coverage. At this cheapness, it seems to make sense to make sure that your family thrives instead of survives.
You can buy more insurance when you have your 3rd or 4th kid - that's likely 5 or more years away, right? No point paying for it now.
That is extremely dangerous advice. Insurability is fragile. I see too many people who need coverage and can't get it at affordable rates. The one thing that the vast majority of these people had in common is that at one point they were insurable.
Look what happens even if he stays insurable, but he just gets a little heavy or develops high blood pressure, etc. I'm comparing purchasing an extra $500,000 now to waiting 5 years to get it. I'll assume in 5 years, he'll get a 15 year policy, just so that I'm doing apples to apples with a 20 year purchased today. His rate on that extra $500,000 will be about $35/month. What if he stays in excellent health? The rate will be about $15/month. In short, there's plenty of downside risk to waiting to purchase coverage, but very little in the way of upside benefit.
What is your income? Your family shouldn't be living better after you die than before.
Why not? Shouldn't his family live in the style that he wants them to live? He's 25 years old. He has dreams and goals for his family. He's probably had late night talks with his wife about how he wants things to be. They are going to move to a nicer neighborhood, have a big house with a picket fence, send his kids to private school, etc. Should the dreams that we have for our families that will be accomplished through our hard work die because we do? I am not saying that he wants these things, but, rather, everything should be based upon his wants for his family. For some people, it is about having their family survive. Others want to make sure that their family thrives.
I would do 10x the income necessary for your family to function should you die. Why 10X? I can pretty confidently invest in Mutual Funds that should earn close to 10% (as in 75% of the time) long term. If I needed $100,000 then $1M should throw that amount off without touching the principal. Should it not, I would have to dive into some of the principal which should not be an issue. I have never heard of anyone that said they got too much from life insurance, but many say they did not get enough.
If someone wants $100,000 year, $1,000,000 won't come close to getting the job done.
Problem 1: Let's assume for a second that you have an investment that will give you $100,000/year. The best case scenario, is that everything will be a capital gain and the spouse will get $85,000. Now factor in inflation, the fact that it won't all be capital gains, and capital gains tax rates will go up and it should be easy to see that even if she gets 10% a year, $1,000,000 isn't enough to give someone $100,000 of income.
Problem 2: There is no investment that will give 10% a year, so let's try assuming that she will average 10% a year. We'll completely ignore taxes and inflation. What if the returns looked like this in years 1-10?:
-20%, -10%, 35%, 10%, 27%, 18%, 0%, 10%, 14%, 30%. This is the same as averaging 10%, but after 10 years, the balance would be down to a little over $500,000. If taxes an inflation were factored in, I'm guessing that she'd be down to about $300,000.
Problem 3: It's insane to think that someone can average 10%. You said that you can get 10%, 75% of the time. Ok. Let's generously say that you average 0% on the years that you don't get around 10%, this only works out to an average of around 7%.
It's only realistic to be able to take $40-$50,000 before taxes out of an investment of $1,000,000. If $100,000 a year is going to be generated from life insurance proceeds, a $2,000,000 benefit is the minimum needed.
I suppose I may have put too much of an emphasis on getting coverage now (when I'm young and healthy) while it's so cheap. cowboyBill is the only one that seems to think I've underestimated my need; I'd like to hear more of what he might have to say.
Putting the emphasis on getting coverage now is smart! I don't know what you need. It really depends on what you truly want for your family. Here's one completely unscientific way to determine if you have a good amount of insurance. Take that $750,000 that MikeF is suggesting that you get. If I was willing to give you $750,000 today and in exchange you could never work again no matter what, would you accept the offer? That is what you would be asking your family to do...replace your ability to earn an income with a lump sum. Until you apply, you don't even know what the rate will be. Why don't you apply for the most coverage that you can get, and then make a decision after you are positive what the rates will be? After the policy is approved, you can accept it or lower to the amount that fits your comfort level and your budget.
I'm definitely planning to get coverage for my wife as well, she does so much for the family. I think something like $400k would provide for child care for several years and give me several months off of work.
Just to give you something to think about...What's important to you? For instance, my wife is a stay at home mom because that is what we feel is the best for our children. We have a lot of life insurance on her. Day care is not acceptable to us. If she dies, we don't need to replace her income with child care. We need to replace my income so that I can become a stay at home dad and then probably suffer a permanent shortfall in pay since I want to be home when my kids get out of school for the day. Term insurance is so cheap. Decide what you want and cover that want.
Also, be careful with your thought process that you won't need/want insurance in 25 years. More than likely that won't be the case and you'll actually have more. Don't believe me? Go talk to 10 50 year olds. 9 of them will have more coverage now than when they were 25. Why is this? They had a $50,000 mortgage. Now, they have a $400,000 mortgage. They were making $25,000/year. Now, they are making $250,000/year, etc.