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.)

SWR: 4.5%, Retirement Duration: 15 years

SWR: 4.5%, Retirement Duration: 20 years

SWR: 4.5%, Retirement Duration: 25 years

What these charts show
- For a retirement of 15 years or less, the investment space is largely “green”.
- For 20-25 years, investments with a stock profile (return and stdev) are becoming risky.
With an SWR of 4.5% being so successful for short periods, let’s look at a 6.0% SWR and 7.0% SWR for just 10-15 years.
Charts for 6.0% and 7.0% SWR at Shorter Retirement Durations
See chart titles for details (SWR, retirement years, etc.)
6.0% SWR, Retirement Duration: 10 years

6.0% SWR, Retirement Duration: 15 years

7.0% SWR, Retirement Duration: 10 years

7.0% SWR, Retirement Duration: 15 years

What these charts show
As you might expect, the shorter retirement periods allow for substantially higher withdrawal rates.
The heatmaps use simulated data based on an asset class's real return and stdev. Let’s take a look at how some of these scenarios play out against historic data.
Historic Simulation - 20 Year Retirement, Starting in 1920, 4.5% SWR
See chart titles for details (SWR, retirement years, etc.)


These charts are for a 4.5% SWR, for a 20 year retirement, invested 100% in the S&P500. (We simulate a retirement for every year, starting in 1920, until 2015. For years after 2010, less than 20 years are simulated.)
- We ran a 15 year retirement and it had zero failures since 1920.
- The chart of real return for a 20 year retirement shows a single failure for retirement starting in 1969. (See the red line segment in the otherwise green line.)
- The balances chart (balances from each simulation starting in 1920) shows the failure and some lower balances.
- 100% stocks is not a recommendation, but used to show that at this shorter retirement duration a portfolio can take more risk with a 4.5% SWR.
Running against historic data shows the portfolio was a bit more robust than when based on simulated returns.
Historic Simulation - 10 Year Retirement, Starting in 1920, 8.0% SWR
See chart titles for details (SWR, retirement years, etc.)


These charts are for a 8.0% SWR, for a 10 year retirement, invested 100% in the S&P500. (We simulate a retirement for every year, starting in 1920, until 2015. For years after 2010, less than 20 years are simulated.)
- We ran a 10 year retirement at 7.0% SWR and it had zero failures since 1920.
- The 8.0% SWR chart of real return shows two failures for retirement starting in 1973 and 2000. (See the red line segment in the otherwise green line.)
- The balances chart (balances from each simulation starting in 1920) shows the failures and some lower balances.
- Again, this is not a recommendation, but used to show that at this shorter retirement duration a portfolio can take more risk with a higher SWR.
Key Takeaways
- Retirement duration of less than 30 years may be appropriate for some.
- For these shorter durations, SWR can be increased, and the portfolios can withstand higher volatility.
“Just because you can, doesn’t mean you should”
Again - these are not recommendations. Just because simulations and historical data suggest you could take on more risk, doesn’t mean you should. The optimal approach is generally to take on the LEAST risk, at a real return required to get to the desired SWR.
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Disclaimer
For Educational Purposes Only: All content on this site, including articles, tools, and simulations, is for informational and educational purposes only. It should not be construed as financial, investment, legal, or tax advice. The information provided is general in nature and not tailored to any individual's specific circumstances.
Software Development Has Inherent Risks: The software used to perform the analyses may have errors or inaccuracies. When we post updates to any material, errors or inaccuracies that are subsequently fixed may change the results.
No Guarantees & Risk of Loss: The analyses and simulations presented are based on historical data. Past performance is not an indicator or guarantee of future results. All investing involves risk, including the possible loss of principal. Market conditions are subject to change, and the future may not resemble the past.
No Fiduciary Relationship: Your use of this information does not create a fiduciary or professional advisory relationship. We are not acting as your financial advisor.
Consult a Professional: You should always conduct your own research and due diligence. Before making any financial decisions, it is essential to consult with a qualified and licensed financial professional who can assess your individual situation and objectives. We disclaim any liability for actions taken or not taken based on the content of this site.
Nobody associated with Algorithmic Fire LLC has any credential(s) or affiliation(s) with any licensing or regulatory bodies, including but not limited to: Securities and Exchange Commission (SEC), Financial Industry Regulatory Authority (FINRA).
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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?