Saving enough for retirement

Learn this with friends

MathsFinancial mathematics (TX TEKS)5:205 check-ins

About this video

Sal compares an early saver ($100/month for 40 years) with a later saver ($200/month for 20 years) at 8% a year: both put in $48,000, but the early saver ends with about three times as much thanks to compounding. He then introduces the 4% rule for estimating how much you need saved, and reminds viewers to factor in taxes, changing costs and inflation.

You'll be able to

  • explain why starting to save early leads to much more money, even with the same total contributions.
  • use the 4% rule to estimate yearly retirement income from savings, or savings needed for a yearly income.
  • name costs that may go down and costs that may go up in retirement.

Key words

compounding
Earning returns on your earlier returns, so money grows faster the longer it is invested.
return on investment
How much your investment grows each year, shown as a percentage (like 8% per year).
4% rule
A rule of thumb that you should be able to live off 4% of your retirement savings each year.
inflation
The general rise in prices over time, so the same money buys less in the future.
Social Security
Government benefits many people receive in retirement, in addition to their own savings.
Transcript

- [Instructor] So let's talk a little bit about saving enough for retirement. So I'll start emphasizing how important it is to start early versus, let's call it not early. And I'll give you a scenario here. Let's say that in the early scenario, you are going to put in $100 per month.

And you're going to do this for, let's call that 40 years. 40 years. And you're going to get 8% per year return on your investment. So if you think about $100 a month for 40 years, that's going to be $48,000 in total is what you directly contribute. But you also get this growth.

Now, the not early scenario, let's say you double your contribution, so you're doing $200 a month. But you're doing it for half as much time. You're doing it for 20 years. And you're getting the same investment return. So you're not making different choices on how you invest your money.

And once again, you are also putting in $48,000 in total. What's your gut sense of at the end of this, of either of these periods, who's going to have more money or less money, or whether it might be similar? Well, it turns out, and there are many calculators on the internet, or you could get a spreadsheet out to actually calculate this, the person in the the early saving category is going to save $349,100.78.

Versus the person in the not early category is only $117,000, or $117,804.08. So even though they contributed the same amount of money, the early saver, because of that compounding for longer, especially those early contributions, is getting roughly three times as much saved up.

Now, another misconception... Hopefully, now you are very clear. However old you are, start, start investing, start putting money away. Now, another big question is, how much money do you need to put away? And that will depend on the standard of living you have, your capability of saving, how much you're bringing in, how much you're spending, your budgets.

And we have many, many videos on all of those things. But some people might imagine, well, maybe $1 million is more than I would ever need. I'm a millionaire after all. But you have to remember, retirement is when you are no longer working, or at least working in the traditional sense.

So you're no longer bringing in income. So you have to essentially live off of this money. You might get some other things. Maybe you have a pension. Maybe, well, likely to have Social Security benefits, things like that. But for the most part, you're going to try to live off of this $1 million.

And you don't know how long you're gonna live. Hopefully, you live a very long and healthy life. So if you retire at 65, it's possible that you might, you might need this money for 25, 30, 35 years. Lifespans are getting longer. Healthcare is getting better. Now, a rule of thumb that a lot of retirement planners would say, they would say the 4% rule.

That however much money you have, you need to be able to live off of 4% of that money. So for example, if you were to have $1 million when you start retiring, that means that you should be able to live off of 4% of that, which would be $40,000. Now, in some places, some parts of the world, that is doable.

And some parts, not so doable. And you have to keep in mind, where's this money being saved? If it was a 401(k), you didn't pay taxes when it went in. You didn't pay taxes while you were investing it. But as you start taking it out, you will pay taxes on it. So you're not even going to get necessarily the full $40,000.

And so if you said, "I needed 80,000," well, you're gonna have to put $2 million in. And if you go back to these calculations before, if you're this early saver, if you wanna save $1 million, or even $1 million after 40 years, so you have to start early. You gotta start in your early 20s there.

You would have to not put $100 a month and get an 8% per year. You'd have to put about $300 a month, so approximately 300 per month. And this person who didn't start quite as early, although 20 years isn't horrible, well, this person is going to need almost, is going to need almost, what is this, eight, nine times as much money put in.

So if they only got a 117, and if they actually want to get to 1 million, so if I were to multiply this times eight, you're looking at more like $1,600 a month that they're going to need to put in. So keep all of this in mind. Keep in mind your cost of living.

Keep in mind that the costs that are likely to decrease. Hopefully, your car and housing expenses go down when you retire. Maybe it even gets paid off. You're less likely to have childcare costs, college costs. Your tax rate might go down. But there's other things that might go up.

Things like healthcare costs, inflation. Remember, this money, you're spending it in the future. And things get more expensive. Even a good inflation rate is two or 3% and the not... And in many years, sometimes you have inflation rates a lot higher than that.

So you have to make sure that that's not just in today's money, $40,000. You have to say, "Okay, what would it be like in 40 years or 20 years? How far will $40,000 go?" And it might not go that far.

Video © Khan Academy, used under CC BY-NC-SA. Watch on Khan Academy. Puzzicle is not affiliated with Khan Academy.