I'd second those recommending tax if you want to run competitively.
Generally the hours are better, less travel (although I got slightly screwed in that I did travel a fair bit but that is relatively rare). When not travelling it wasn't that difficult to get 100+ in as the hours were very reasonable. 9:30-6:00 in my case which was faintly ridiculous (and now having moved to industry the stories I hear from my former colleagues who worked in audit suggest that certainly wasn't the case).
Also the work tends to be better. If you focus on advisory as opposed to compliance and in a specialist area (those doing personal tax compliance get destroyed...) then you're supplying a service that hasn't been commoditised like audit or compliance. I found myself doing relatively little spreadsheet work and mostly analysis of legislation (the pure advisory side work I did is usually done by lawyers in other countries).
This does hurt your exit opportunities but if you're bright and interview well then you can get into exactly the same jobs as your audit colleagues - you might just need to work a bit harder at that point. This is presupposing that you have excellent academics.
Something that's worth noting is that if you do your "apprenticeship" in the Big 4 at a full service firm then you can do stuff that pretty much mirrors almost every other professional industry. You can do stuff that is very legalistic and even transfer to law (one of our associate partners transferred to be a partner at a major law firm). You can work in advisory team and do consulting work and transfer there. You can work in transaction services and end up in a bank etc. Yes - it's not the same work but it'll give you enough to talk about in the interview and at 24/25 with 3 years solid work experience that's really all you need.
Yes the salary is worse and you'll maybe be a year down on those who went there immediately but to be honest it'll give you a better sense of the work involved with more flexibility to transfer to another area if it doesn't suit you. That's less of an option for those working in those companies.
You'll work less hours (a lot of those in those careers burn out in the first couple of years) and ultimately if you're a qualified accountant you can ALWAYS find work.
The social side (at least a Big 4) is also a big factor especially when studying - sometimes it can feel that you're still at uni just with a lot more money. This can be good for the first 3 years although when you get to senior managers and directors who still want to live like this you need to consider if that's really the life you want. You'll also (likely) be surrounded by similar sporting people. In my current (admittedly industry) role surrounded by ex-big 4 grads about 75% of the office exercise relatively seriously with groups of 5 or 6 on lunch runs, regular gym trips etc.
Hope that helps. Context is UK system where it's perhaps a slightly more prestigious career than in the US by the sounds of it (or at least ACA / CA are).
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