How Long is Retirement?
30 Years?
- 30 Years is a common assumption.
- The reasoning is that most people wait until they are eligible for Social Security and Medicare, which historically has been 65.
- Life expectancy past 65 is low. SSA (Social Security Administration) estimates that only 1 in 7 live to 95; that is 14%. (Reference: When to Start Receiving Retirement Benefits
Why it Might be Less?
- You worked until very late in life.
- You’re terminally ill.
- You’re only using retirement funds as a bridge to something else (inheritance, Social Security, pension, etc.)
This is Part Two - Please Read Part 1
If you haven’t read our prior posts on SWR and SWR Failure, please do so now. Those posts provide detail about the simulation and charts shown next.
Simulation Results
Reminder of what is shown…
Heatmaps
- Red points indicate failure (the account ran out of money), green points indicate success.
- These are based on SIMULATED returns given an asset class's average return and stdev; these use simulated returns, not historical data.
Historical Data
- These charts show the real return for a given investment strategy versus time, based on historical data, with success/failure for a given retirement start mapped on top of that in red/green
Charts for a 4.5% SWR for 10, 15, 20 and 25 Year Retirements
See chart titles for details (SWR, retirement years, etc.)

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View Video Transcript
You know, whenever you hear about
retirement planning, it always seems to
come back to the same old ideas, right?
The 4% rule, planning for a 30-year
timeline. But what if that's not your
story? What if your retirement is going
to be much, much shorter? Well, today
we're going to dive into some really
fascinating data that completely
challenges those one-sizefits-all rules.
And honestly, the results might just
change the way you think about your
entire financial future. I mean, this is
the big question, isn't it? It doesn't
matter if you're just starting your
career or you're about to wrap it up.
This is the puzzle we're all trying to
solve. How do you make absolutely sure
that your nest egg lasts as long as you
do? We're about to see how changing just
one single variable, the length of your
retirement, can totally flip the answer
on its head. So, here's how we're going
to break it all down. First, we'll look
at the standard rule of thumb that
everybody talks about. Then, we're going
to question it and ask, "What if things
are shorter?" After that, we'll dig into
some powerful simulation results, test
them against nearly a century of real
market history, and then wrap it all up
with the most important part, the
takeaway and a critical warning for you.
All right, first up, the retirement rule
of thumb. Let's start with the
conventional wisdom that pretty much all
financial advice is built on, and then
we'll see why it might be time to poke
some holes in it. So, this 30-year model
is basically the foundation for almost
every retirement calculator out there.
The idea is simple. You stop working
around 65, maybe when you can get
Medicare, and then you need your money
to last you all the way into your mid
'90s. But get this, according to Social
Security data, only about one out of
every seven people actually lives that
long. So, it's a super conservative
starting point, but it's the one almost
everyone uses. But here's the thing. Not
everyone fits into that neat little box.
So, let's explore what happens to your
money if you're actually planning for a
much shorter retirement. And there are
some really practical real world reasons
why this might be your situation. Maybe
you just loved your job and worked into
your 70s. Or on a more somber note, it
could be because of a difficult health
diagnosis. Or maybe you just need your
investments to be a bridge fund. you
know, a pot of money to cover you for 5
or 10 years until a pension kicks in or
you decide to take social security or
maybe an inheritance is on the way. For
any of these reasons, planning for 30
years just makes no sense at all. Okay,
now for the really cool part, the
simulation results. This is where we get
to see exactly how the odds of success
change when we start shrinking that
retirement window. All right, now check
this out. The best way to understand
this is to think of it like a weather
forecast for your money. That vertical
line, the y-axis, that's volatility, how
bumpy the ride is. The horizontal one,
the x-axis, is your average return, how
much you're making. And the color, well,
green is good. It means your portfolio
survived with an over 98% success rate.
Red, red is where it gets risky. And as
you can see, for a 10-year retirement,
pulling out 4.5% a year is, well, it's
almost solid green. It's incredibly
safe. And this right here, this slide
shows you everything you need to know
about the power of time. On the left,
you've got that beautiful, safe green
10-year plan. But look what happens on
the right. This is a 25-year retirement
with the exact same 4.5% withdrawal
rate. Suddenly, a huge chunk of that map
turns red. Why? Because that longer
timeline gives bad luck, like a market
crash right after you retire, so much
more power to derail your entire plan.
So, the bottom line from all these
simulations is pretty straightforward.
If your retirement horizon is 15 years
or less, a 4.5% withdrawal rate is shown
to be extremely safe. It holds up across
a massive range of different investment
types. Everything from conservative
bonds to high growth stocks. The risk of
running out of money is just remarkably
low. Okay, so this of course leads to a
very very tempting question. If the risk
is so low at 4.5%,
does that mean we have some wiggle room?
Does a shorter time frame give us
permission to maybe push that withdrawal
rate a little higher? How much more
could you really take out each year?
Well, according to the simulations, the
answer is a pretty resounding yes. Look
at this. On the left is our original
4.5% plan. On the right, we have cranked
the withdrawal rate all the way up to 7%
for that same 10-year period. And yet,
you see a little red creeping in on the
left for lower return assets. But there
is still a massive green zone of success
for portfolios that are heavy in stocks.
It really suggests that a much higher
withdrawal rate could actually be
possible. Simulations are great. They
really are. But they're just models. The
real stress test is to see how these
ideas hold up against actual history
with all its real world chaos, its
crashes, and its incredible booms. So
before we look at the historical data, I
want you to see what success and failure
actually look like. This is sometimes
called a spaghetti chart. Each one of
those thin gray lines is one possible
future for a 20-year retirement. Most of
them, as you can see, finish with plenty
of cash to spare. But those few lines
that just nose dive to zero, that's
portfolio failure. That's exactly what
we're trying to avoid. Okay, so here it
is. This is what actually happened in
the real world. This chart shows what
would have happened if you started a
20-year retirement pulling out 4.5% a
year in every single year from 1920 all
the way to 2015. And look at it, it is
almost completely green. That means
through the Great Depression, World War
II, the insane inflation of the 70s,
the.com bust, this strategy worked. In
fact, out of nearly a hundred different
start years they tested, there was only
one. A single failure. That's it. Just
one. If you had the terrible luck to
start your 20-year retirement in 1969,
right before a nasty period of high
inflation and bad stock returns, your
portfolio would have run dry. But every
single other start date was a success.
All right, so what happens if we get
really bold? Let's take what we learned
from the simulations and test a super
aggressive 8% withdrawal rate, but over
a short 10-year retirement. Let's throw
that against the same historical data.
Now, this this feels like it should be
incredibly risky, right? And yet, you
won't believe it. It held up even at an
8% withdrawal rate, which sounds crazy
high. There were only two points of
failure in almost 100 years of data,
just two. If you had retired in 1973,
right at the start of a huge bare
market, or in 2000 at the absolute peak
of the dot bubble, you would have
failed. every other 10-year period, it
worked. So, after all that data, all
those charts, what's the actual takeaway
for you? Let's boil this all down to
what really matters. Here are the big
things to remember. First, you are not
locked into the 30-year model if it
doesn't fit your life. Second, planning
for a shorter time period can
potentially let you support a much
higher withdrawal rate. And third, these
shorter timelines mean your portfolio
can handle more bumps in the road, which
is why even 100% stock portfolios did so
well in those historical tests. But we
have to end on this, and it's a critical
warning that comes straight from the
source of this analysis. The data shows
that you could take on more risk, and
you could withdraw more money over these
shorter periods, but the smartest path
is always to take on the least amount of
risk you need to in order to reach your
goals. This data opens up new
possibilities for sure, but it is not a
license to be reckless. It's a tool to
help you plan smarter and in a way
that's personalized to you. So the real
question isn't just how much can I take.
The better question is how much risk do
I actually need to take?