FIRECALC & WR's

[Midpack]

Just for fun, I did a classic 4% SWR age 65 scenario to show what year to year withdrawal % would actually be for average, best case and worst case. Illustrates how wildly results can vary if a retiree were to just blindly follow the 4% rule without regard to asset balances (not that anyone would) - and how pinning down a bulletproof number in advance is out of the question. I was just curious to see the result in this format, thought maybe others might...

First chart is withdrawal rates for each year (expenses inflated by 3% each year) starting with 4% SWR and following the classic withdrawal methodology. Second chart is corresponding asset balances, same chart as FIRECALC provides except only showing 4 cases instead of all.

The point is not to examine the results, as much as comparing best, worst and average cases.

Assumptions:
Retired age 65
Plan duration 30 years (age 95)
Nest egg $1MM
Expenses $60K/yr initial ($40K withdrawal, $20K Soc Sec starting age 65)
Inflation 3%
FIRECALC probability of success 94.6%
Default asset allocation & returns

[marko]

Just curious here (don't want to set off a storm)... but I'm wondering how much faith folks here put into Firecalc.

I find it to be a fantastic tool and it confirms the results of other calculators, but some posters seem to take the results as 'gospel'. Sort of "well, I ran my inputs through Firecalc and it says that I'm good, so I'm on my way!..."

To me, it is a guide that tells me if I'm in the ballpark or out in the weeds. When a calculator tells me that in 30 years I could have between a $400K or $14,000,000 balance, there has to be a lot of room for error. No?

[W2R]

Quote:

Originally Posted by marko Just curious here (don't want to set off a storm)... but I'm wondering how much faith folks here put into Firecalc. I find it to be a fantastic tool and it confirms the results of other calculators, but some posters seem to take the results as 'gospel'. Sort of "well, I ran my inputs through Firecalc and it says that I'm good, so I'm on my way!..." To me, it is a guide that tells me if I'm in the ballpark or out in the weeds. When a calculator tells me that in 30 years I could have between a $400K or $14,000,000 balance, there has to be a lot of room for error. No?

I would NEVER take results from any retirement calculator as gospel. Even though I think FIRECalc is one of the better ones available, I only regard it as a double check. If FIRECalc didn't give me a good result, it would be a huge red flag for me, in other words. FIRECalc is a bit optimistic for my tastes (but then, I tend to be pretty cautious).

I always recommend running one's scenario through FIRECalc as a doublecheck, but I don't think that is all there is to retirement planning.

[REWahoo]

Quote:

Originally Posted by W2R (but then, I tend to be pretty cautious).

........

Ahem. Uh, sorry. Lost my head there for a minute.

[Midpack]

Quote:

Originally Posted by marko Just curious here (don't want to set off a storm)... but I'm wondering how much faith folks here put into Firecalc. I find it to be a fantastic tool and it confirms the results of other calculators, but some posters seem to take the results as 'gospel'. Sort of "well, I ran my inputs through Firecalc and it says that I'm good, so I'm on my way!..." To me, it is a guide that tells me if I'm in the ballpark or out in the weeds. When a calculator tells me that in 30 years I could have between a $400K or $14,000,000 balance, there has to be a lot of room for error. No?

I'd suggest you start a thread to explore that question. That's not what this thread was for at all...

[marko]

Quote:

Originally Posted by Midpack I'd suggest you start a thread to explore that question. That's not what this thread was for at all...

Ok. Sorry. I've always had a problem with tangent control.

[GrayHare]

Midpack - I'm not clear on what you want to explore. Yes, the two Firecalc charts present the data in different ways, but I would draw equivalent conclusions from each. Should that not be the case?

[Midpack]

Quote:

Originally Posted by GrayHare Midpack - I'm not clear on what you want to explore. Yes, the two Firecalc charts present the data in different ways, but I would draw equivalent conclusions from each. Should that not be the case?

Not meant to be a revelation. Just two ways of looking at the same thing as you say. I think everyone knows how wildly different assets would grow for best and worst case, or residual $ after 30 years.

Viewing same as actual withdrawals for each year following the 4% SWR methodology is easier relate to IMO, that's why I did it. Imagine withdrawing at more than 10% yr after yr for the last half of retirement - and not running out of money as the worst case shows. Who would have the nerve, not me, even though you'd have a 95% chance of success based on past history. OTOH, imagine withdrawing less than 1% for many years, while still building a considerable nest egg, with no need to reduce spending at any time. Just puts the huge divergence in potential outcomes in perspective more clearly for me. Maybe I'm the only one. Luck of the draw is an understatement IMO.

And again, I realize no one would mindlessly follow the 4% SWR methodology without regard for outcomes as they develop.

[pb4uski]

To me it just reinforces that flexibility is a key aspect of retirement and being able to dial down expenses if investment results lag is important.

[Lsbcal]

Quote:

Originally Posted by Midpack ...(snip)... Assumptions: Retired age 65 Plan duration 30 years (age 95) Nest egg $1MM Expenses $60K/yr initial ($40K withdrawal, $20K Soc Sec starting age 65) Inflation 3% FIRECALC probability of success 94.6% Default asset allocation & returns

Here are a few questions about the inputs that I've wondered about for my own case:

1) Assuming our retiree owns his house (no mortgage), wouldn't a good plan B be to assume he could sell at 85, then rent and live on the balance + SS? In that case, couldn't he just run the simulation for 20 years and assume that it's pretty much worst case?

2) Before 1930 the stock market allowed extreme equity leveraging by individuals. Today that is not done much and probably not by most retirees. So I've always run my simulations starting around 1925 but payed particular attention to the "retire in 1968" line which I think is close to worst case for current history. I noticed the worst case in OP's simulation was 1906 (I think) -- maybe just too long ago to realistically take into account with current economics? This is probably a very debatable point but just thought I'd mention it.

3) When I run FIRECalc I use the CPI inflation rate. Did the above just use a straight 3.0%? If so I think it is too optimistic. Post WW2 inflation was high as was the 1970's.

[Bestwifeever]

Quote:

Originally Posted by Midpack I'd suggest you start a thread to explore that question. That's not what this thread was for at all...

When did that ever stop us !

[Major Tom]

Quote:

Originally Posted by marko When a calculator tells me that in 30 years I could have between a $400K or $14,000,000 balance, there has to be a lot of room for error. No?

The philosophy behind Firecalc is clearly stated on the main page. Anyone who would expect such a tool to provide a very narrow range of specific outcomes needs to do a bit more reading.

[IBWino]

I find it interesting that the worst-case and best-case scenarios start only 6 years apart: worst - 1969, best - 1975.

[d]

Quote:

Originally Posted by IBWino I find it interesting that the worst-case and best-case scenarios start only 6 years apart: worst - 1969, best - 1975.

ditto

[Major Tom]

Quote:

Originally Posted by IBWino I find it interesting that the worst-case and best-case scenarios start only 6 years apart: worst - 1969, best - 1975.

I'm not sure if that's interesting or downright scary

[frayne]

Firecalc, is kind of like a GPS, good for general directions, in general, but you still need to exercise some common sense.

Can I get an Amen ?

[Midpack]

A m e n !

[H2ODude]

I like the Firecalc a lot in that it shows the variability we all (should) know about. I'm new here but not to these calculators. I've used the Fidelity one, and what I like about it is that it accounts for what is yet to be taxed (IRA's etc) as well as state taxes and gives you a detailed cash flow based on their worst case. Yes, you can see what would happen in 9/10, 3/4, and 1/2 scenarios, but the Firecalc gives you a more graphic view of the spread.

I think what the spread the firecalc shows is that the first few years (well, if you're retiring really young more than first few) you better be willing to be flexible. I wouldn't want to have it figured to the nearest $100 a month and go into what we went into in 2008.

Anyway, good board, like all the thoughts here.

[Live And Learn]

I've run my numbers throught FireCalc, Fido, Vanguard and my own homegrown spreadsheet. I like to "compare and contrast". I'm starting to get some consensus (worst plan has my portfolio depleted in 30 years, age 80, best has me depleted in 38 years). My conclusion is that my portfolio will be depleted somewhere in between. As long as my SS will cover roof and food at age 80 then I'm ok with ER. (BTW - when I talk about SS I assume no future earning and only a 65% payout on the number I get from the SSA website).

[Lsbcal]

Any thoughts on my questions above particularly question #1?

Repeated here:

Quote:

1) Assuming our retiree owns his house (no mortgage), wouldn't a good Plan B be to assume he could sell at 85, then rent and live on the balance + SS? In that case, couldn't he just run the simulation for 20 years and assume that it's pretty much worst case?

Or alternately, as that lower red line on the original chart showed poor results at year 20, couldn't the retiree just sell the house and rent to increase their disposable income? I'm assuming the house has some pretty decent market value and has been maintained and is in a decent local.