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401k Calculator Question

Posted on 10/6/25 at 3:41 pm
Posted by tigergal918
Member since Feb 2022
366 posts
Posted on 10/6/25 at 3:41 pm
Playing around with a few 401k calculators. They ask what rate of return you expect until you retire. If my account is at 15.34% ytd, 24.73% for 3-year, and 16.38% for 5-year...what is a safe, conservative number to use in calculations? I've looked for the overall rate of return since I opened the account but am not having any luck finding it...
Posted by Tifway419
Member since Sep 2022
1645 posts
Posted on 10/6/25 at 3:45 pm to
8%
Posted by Mingo Was His NameO
Brooklyn
Member since Mar 2016
36282 posts
Posted on 10/6/25 at 3:47 pm to
I always use 6% to be conservative
Posted by tigergal918
Member since Feb 2022
366 posts
Posted on 10/6/25 at 3:48 pm to
By no means trying to argue because I know nothing, but if the average performance of the stock market is 10% since inception, why only 8%? (I'm really trying to learn)
Posted by Tifway419
Member since Sep 2022
1645 posts
Posted on 10/6/25 at 3:57 pm to
You said conservative, which IMO is how you should do it.
Posted by Shepherd88
Member since Dec 2013
4875 posts
Posted on 10/6/25 at 3:58 pm to
Because if you plan for 8 and perform 10, then it’s icing on the cake. If you plan for 10, and perform 8 then it’s back to work again.
Posted by tigergal918
Member since Feb 2022
366 posts
Posted on 10/6/25 at 4:03 pm to
Would that number change if I'm invested aggressively, as I have a healthy guaranteed pension?
Posted by Tifway419
Member since Sep 2022
1645 posts
Posted on 10/6/25 at 4:06 pm to
If you can swing it and are young, dump as much as you can into it now. Compounding returns are where you really build your wealth, not just your contributions.
Posted by tigergal918
Member since Feb 2022
366 posts
Posted on 10/6/25 at 4:08 pm to
Haha, not as young as I'd like. Just made 44 and retiring at 60 is our goal.
Posted by CharlesUFarley
Daphne, AL
Member since Jan 2022
891 posts
Posted on 10/6/25 at 4:22 pm to
quote:

Just made 44 and retiring at 60 is our goal.


Then maybe you are counting your pension chickens before they hatch.

A lot of people use a 4%-6% real rate, meaning an inflation free rate. The historical inflation free rate was 7.7% a few years back, I don't know what it is now, but at 7.7% your real purchasing power would double every 10 years.

It's best to use a conservative rate but back it up with a doomsday scenario, like 2% inflation free. Calculate it both ways and develop a plan for both scenarios. You've got time to make both of them work out.

If the real return is 10% instead, well, I think you'll figure out how to react to that.
Posted by lsuconnman
Baton rouge
Member since Feb 2007
4425 posts
Posted on 10/6/25 at 5:17 pm to
quote:

but if the average performance of the stock market is 10% since inception, why only 8%


It’s not the average that gets you. It’s the single 40% down year once a decade that erases years of gains.
Posted by MSTiger33
Member since Oct 2007
21421 posts
Posted on 10/6/25 at 5:39 pm to
I run 10% for average and 12% for giggles.
Posted by CharlesUFarley
Daphne, AL
Member since Jan 2022
891 posts
Posted on 10/6/25 at 5:42 pm to
quote:

It’s not the average that gets you. It’s the single 40% down year once a decade that erases years of gains.


Allocation and discipline solves that problem.
Posted by TorchtheFlyingTiger
1st coast
Member since Jan 2008
2893 posts
Posted on 10/6/25 at 5:58 pm to
quote:

stock market is 10% since inception, why only 8%?
Reversion to the mean. It has been outperforming for years there is some likelihood it may underperform at some point. I'd rather plan conservatively and adjust to more optimistic outcomes.
This post was edited on 10/6/25 at 5:58 pm
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