HP 12C - useful in IB or just man jewelry?

I did my CFA on a TI BAII Plus and never learned reverse Polish notation or whatever system the HP12C works on.

Until recently, I worked in Asia, where many relationship bankers struggled to operate even high school calculators.

I've moved to New York recently and noticed a lot more use of the HP12C in the IB world. I'm now wondering if there is any use learning to use my dusty old HP12C that I bought years ago and only switched on long enough to decide learning a new input system was not worth it for the CFA.

Does reverse Polish notation and the HP12C have any practical advantages for IB work, bearing in mind that (in my experience) most hard crunching calculation is done on Excel and hand calculators are usually just used whipped out to answer simple calcs that can be done in 5 - 10 seconds.

Or is the HP12C mainly useful as a semiotic device that signals that the user is more hardcore banker than others who don't know how to use a HP12C? Not too dissimilar to cufflinks, tie pins and other items of man jewelry male bankers wear to indicate they sit higher up some totem pole of self-regard?

18 Comments
 

I carry an HP 12C solely for the benefit of my MDs. I always used my graphing calculator in school and work because it's easier and familiar. Then one day an MD asked me for a calculator, i handed him my TI-83 and he started punching violently at the keys before handing it back to me and saying wtf is this? Since that day i've carried one in my briefcase and have learned to do rudimentary calculations with it.

 

OK, sounds like I should learn Reverse Polish Notation so I can keep climbing the greasy pole.

I crossed the man jewelry line years ago when I started wearing french cuffed shirts with cuff links, so I'm not worried about burning up time/resources learning a new skill with little practical application for the sake of career development.

Those who can, do. Those who can't, post threads about how to do it on WSO.
 

I think the Leveraged Sell Out blog put it best regarding the HP 12C:

To be fair, though, there is one redeeming aspect of the CFAs—one characteristic that is actually legit, the calculator. One of the two calculators permitted to be used on the CFAs is the HP 12C, and apart from the fact that its name sounds like some highly involved consulting framework, it is the epitome of Banker technology. The 12C embodies everything about us—elegant, bold, somehow clinging on to life in a world that no longer needs it. One look at its brushed plastic exterior and you think: “Damn, this thing is pro.”

http://www.leveragedsellout.com/2008/07/chartered-financial-banalyst/

 

@bootsnapper - great link.

OK, I was extra-observational in meetings today and noticed a few things: - When people brought calculators to meeting (around 20% of meeting attendees), it was always a HP12C (smart phones not included) - Calculators were prominently thrown on top of paperwork - Calculators were not used

This is reinforcing my view that the HP12C is a semiotic device only. This steels my resolve to learn RPN. I would take the device and leisurely toss it on my paperwork, but I fear the occasion may arise to actually use it and my posturing would be exposed. So I have no choice other than to learn RPN.

I have printed out the 31 page HP cheatsheet for the HP12C (seriously, 31 page "cheatsheet"?) and will start working on this. Tomorrow.

Those who can, do. Those who can't, post threads about how to do it on WSO.
 
Best Response

Additional thought - for extra IB swagger, I think you need to enter a meeting WITHOUT a HPC12, but then grab one off the nearest analyst whenever a calc question comes up, ideally with a "Can I borrow that?" request which sets up the expectation of failure ("I bet he doesn't know RPN"), only for you to show you are the BSD.

I think that would get me +2 swagger points, while entering the room with the HP12C (+1 swagger) then using it (no additional points) isn't going to pay out as much.

Contrary views welcome.

Those who can, do. Those who can't, post threads about how to do it on WSO.
 

use whichever gets you to the right answer quickly. screwing up numbers as a junior banker = fail, no matter what calculator you use

if you use 12C and get numbers wrong, will look like you're trying too hard at best, or incompetent and out of place (at worst - an image of a young, awkward boy wearing his dad's suit in mind when thinking of an analyst fumbling with a 12C and F'ing up.. Just wouldn't get too slick..

FYI - I use a 12C, but know how to use, which is admittedly pretty damn easy to pick up if you spend a bit of time with it

 

I haven't gotten an HP-12C yet, but I'm definitely going to get one and use it for my CFA exam (years away from now). I've only been learning RPN for a short amount of time and I've been making fewer mistakes with it than with my normal calculator (I've got an RPN calculator on my phone).

I find that it makes life easier to use when I'm faced with equations like (5-3)/(5*4) since there's no need to use a 2nd key with parentheses. I'm still earning my bachelor's degree in Financial Economics, so I understand that I'm coming off as some dumb kid who doesn't know what he's talking about. But I at least am wanting to get myself in there.

 

If you post this on a CFA forum,about 3/5 times a fight will start towards what the best calculator is, regardless of the question asked.

Now that I gave you that random piece of info, would you really use any calculator over excel? I can't really see a practical use other than it being easier to open your desk quicker than the excel program.

HOWEVER the calculator is useful if you're in a meeting or some scenario where excel isn't available. At your desk, I'm going to have to say man jewelry.

 

Vel dolorem sit soluta ex optio. Officia minima et est quia delectus aut. Porro laboriosam harum ipsa et id. Atque id reiciendis modi.

Career Advancement Opportunities

June 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.9%
  • JPMorgan 01 98.3%
  • Guggenheim Partners 01 97.7%
  • Morgan Stanley 07 97.1%

Overall Employee Satisfaction

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Morgan Stanley 02 98.8%
  • Evercore 01 98.3%
  • BMO Capital Markets 12 97.7%
  • Banco Santander 01 97.1%

Professional Growth Opportunities

June 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.9%
  • Morgan Stanley 05 98.3%
  • JPMorgan No 97.7%
  • Goldman Sachs 02 97.1%

Total Avg Compensation

June 2026 Investment Banking

  • Vice President (14) $434
  • Associates (44) $258
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (22) $179
  • Intern/Summer Associate (13) $156
  • 1st Year Analyst (79) $150
  • Intern/Summer Analyst (73) $101
notes
16 IB Interviews Notes

“... there’s no excuse to not take advantage of the resources out there available to you. Best value for your $ are the...”

Leaderboard

1
redever's picture
redever
99.2
2
kanon's picture
kanon
99.0
3
BankonBanking's picture
BankonBanking
99.0
4
Secyh62's picture
Secyh62
99.0
5
Betsy Massar's picture
Betsy Massar
98.9
6
dosk17's picture
dosk17
98.9
7
DrApeman's picture
DrApeman
98.9
8
GameTheory's picture
GameTheory
98.9
9
CompBanker's picture
CompBanker
98.9
10
bolo up's picture
bolo up
98.8
success
From 10 rejections to 1 dream investment banking internship

“... I believe it was the single biggest reason why I ended up with an offer...”