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Show HN: Investment Calculator – A simple retirement calculator

investmentcalculator.io

121–130 of 218 posts

Re: Show HN: Investment Calculator – A simple retirement calculator

#121

Someone should make a debt calculator that shows when debt will be paid off.

https://unbury.me I believe I first saw this as a Show HN a few years ago. Enter in each of your debts (balance, minimum payment, interest rate) and select your method of repayment and the extra you can put into it (if any).

Thanks for the link, this is awesome!

Re: Show HN: Investment Calculator – A simple retirement calculator

#122

Those seeking a much more sophisticated retirement calculator, where you can set nearly every parameter, such as rate of return, amount saved, and nearly everything else, should checkout firecalc. You can select different withdrawl rate strategies, different investment strategies, deferred compensation strategies, different investment mixes, and many, many other things. The interface isn't as pretty, but it is unbeli…

Am I missing something? The calculator only shows how long my money will last given a spending rate and starting value.

There are many additional places to enter information.

Immediately below the banner at the top of the page are links to several other pages: "Other Income/Spending"; "Not Retired?", and so on.

Re: Show HN: Investment Calculator – A simple retirement calculator

#123
post #54

Earlier quoted context omitted.

Yeah, it's also using a 9% rate of return for the "conservative" scenario and 12% for aggressive. Due to the exponential nature of compound interest, just a single point of overoptimism in your real growth number leads to a massive overestimation of your results. 1.07 ^ 30 = 7.6, 1.09 ^ 30 = 13.3, and 1.12 ^ 30 = 30.0 It's baseline assumptions are way off.

Yowzers! Please tell me what this magical investment is where I can expect an average rate of return of 9% (let alone 12%). That is off the charts optimistic.

S&P 500 annualised returns over:

5 years - 15.79%

10 years - 8.49%

15 years - 9.92%

20 years - 7.19%

25 years - 9.69%

Re: Show HN: Investment Calculator – A simple retirement calculator

#124

Earlier quoted context omitted.

Yowzers! Please tell me what this magical investment is where I can expect an average rate of return of 9% (let alone 12%). That is off the charts optimistic.

Assuming dividend reinvestment, the S&P 500 has returned an annual average of 10% nominally (7% real), over the last 100 years or so.

[deleted]

Re: Show HN: Investment Calculator – A simple retirement calculator

#125

Be careful with this: The projections are gross (ie not inflation-adjusted) and the advice buried in the explanatory text below does not sufficiently discuss this issue. It says you can do a "simple" calculation by applying one year's worth of inflation versus a compounded rate of return. Assuming historical inflation rates, the value of the savings it projects will be significantly eroded compared to what it shows.…

I agree with this. Inflation is a huge factor and needs to be considered with any retirement calculator because you can't assume that your $100K today is worth $100K in 20 years.

I actually built a calculator myself to better accommodate for inflation and have the ability to tweak the numbers just a bit more. If you're interested:

https://www.financialtoolbelt.com/calculators/financial-inde...

Re: Show HN: Investment Calculator – A simple retirement calculator

#126

Those seeking a much more sophisticated retirement calculator, where you can set nearly every parameter, such as rate of return, amount saved, and nearly everything else, should checkout firecalc. You can select different withdrawl rate strategies, different investment strategies, deferred compensation strategies, different investment mixes, and many, many other things. The interface isn't as pretty, but it is unbeli…

Another more detailed one is cfiresim

http://cfiresim.com/

Re: Show HN: Investment Calculator – A simple retirement calculator

#127

Does this assume that I'll live forever, or that I'll die some day?

Ah, it does not assume that you'll die:

The retirement calculator takes the Total retirement savings and calculates how much monthly income a 4% annuity would generate without drawing from the principal. This indicates the type of lifestyle you can expect without running out of money.

Or, to put it another way: it assumes that you want to be worth roughly the same at death as you were at retirement.

That's fine, but it bears mentioning - since it assumes you want to pass on potentially millions of dollars at the time of your death.

If you aim to break even at death, that changes the calculations.

Re: Show HN: Investment Calculator – A simple retirement calculator

#128

Earlier quoted context omitted.

While it is fashionable to doubt that Social Security will be around for the Gen X or Millenial retirements, the reality is that it's simply a matter of political will. If people like Social Security (and they generally do), then all they have to do is vote for politicians who will protect it, and harass politicians when it looks like they won't. Of course it's fine to plan for a retirement without Social Security...…

IMO, publicly despairing that social security won’t exist in the future only serves to shift the Overton window, making it more likely that social security won’t exist.

Of course it won’t exist. It’s an asinine, regressive policy that uses trick after evil trick to convince voters that it’s not an unholy abomination.

I know my rhetoric sounds like a joke, but I’m 100% serious. You have the fake notion that “employers pay half” (no, the worker pays 100% of it truly), you have its regressive nature (poor people start working earlier and also die earlier, so it’s a redistribution towards the wealthy), you have the fact that it’s sold as a sort of insurance/retirement account when in actuality it’s neither.

Honesty, you’d be hardpressed to find a more awful government “safety net” program. I miss the days when I supported myself only on illegal income and got to avoid the whole issue. Alas, those days are gone.

Re: Show HN: Investment Calculator – A simple retirement calculator

#129
post #54

Earlier quoted context omitted.

Yeah, it's also using a 9% rate of return for the "conservative" scenario and 12% for aggressive. Due to the exponential nature of compound interest, just a single point of overoptimism in your real growth number leads to a massive overestimation of your results. 1.07 ^ 30 = 7.6, 1.09 ^ 30 = 13.3, and 1.12 ^ 30 = 30.0 It's baseline assumptions are way off.

Yowzers! Please tell me what this magical investment is where I can expect an average rate of return of 9% (let alone 12%). That is off the charts optimistic.

[deleted]

Re: Show HN: Investment Calculator – A simple retirement calculator

#130

Those seeking a much more sophisticated retirement calculator, where you can set nearly every parameter, such as rate of return, amount saved, and nearly everything else, should checkout firecalc. You can select different withdrawl rate strategies, different investment strategies, deferred compensation strategies, different investment mixes, and many, many other things. The interface isn't as pretty, but it is unbeli…

I second the motion on firecalc because it really helps you visualize in how many 30 year periods historically you would have gone to zero (which is obviously the thing everyone most needs to avoid). The 100 year averages are useless as they don't encapsulate realistic investing lifetime chunks of around 30 years, the firecalc approach gets around this with the 30 year increment parameter (which you can tweak as well). It's a better way to approach the problem.
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