Personal Finance: Credit/Debit Card, Checking/Savings Account, Index Fund

Right now, I'm 20 and I have about $20k to my name. It's all sitting in a checking account with no fees. I pay for things with a debit card.

I want to start a credit card to build my credit history. I also recently opened a low-fee brokerage account and wanted to put most of my cash into an index fund.

How should I structure this? I was thinking of funding the brokerage account with 19k and splitting that between maybe three indexes.

I'd keep 1k in my checking account, set up an auto-pay for the credit card bills out of there, and pay off each bill completely and on time each month. Am I able to set up a bill auto-pay from a savings account so that I can open some small amount of interest? Or does it make sense to keep a checking account? Both?

And if I need more cash for my credit card bills, I'll have to liquidate shares of the index funds.

Does that make sense? Any advice?

Thanks a lot.

28 Comments
 
cakepie

I'd keep more in cash. You're young and have plenty of time to invest over time. 20% in cash ensures you'll always have some money on hand for emergencies and sudden bills regardless of short-term index drops.

I have low expenses and have future tuition payments ready in a separate account. If I ever need cash, I could just sell index shares and transfer them to my bank. Meanwhile, that cash could be making more.
 
Best Response

I'd keep on buying in the US for a long time in equity. If you are worried about the US, look at the rest of the world and you will understand. The US has the privilege of holding everybody else by the balls to get out of trouble. As long as they will keep the printing press in action you will see some nice inflation, and equity is a great hedge vs. inflation, your cash will just keep on losing its value by the day.

If you are young and in college, why don't you take a more active approach to investing? Stick in an index fund for now (if cash is not an issue, just use the cash to build your credit history as you said). And start building a mock portfolio for the next 3-6months, plenty of them to chose from online; do not invest right away, unless by active approach you are going to stick most of your cash in US blue chips and not rotate for 6mths+. Stick 4K into a Roth, or whatever the max allowance is, and play there, you can take 10K out for your first buy tax free, so you don't have to wait for retirement.

 
Disjoint If you are young and in college, why don't you take a more active approach to investing? Stick in an index fund for now (if cash is not an issue, just use the cash to build your credit history as you said). And start building a mock portfolio for the next 3-6months, plenty of them to chose from online; do not invest right away, unless by active approach you are going to stick most of your cash in US blue chips and not rotate for 6mths+.
Stick 4K into a Roth, or whatever the max allowance is, and play there, you can take 10K out for your first buy tax free, so you don't have to wait for retirement.

+1 (What I've personally done)

I keep about 6m worth of cost of living in cash, rest in a brokerage account with ~75% etfs on major index and ~25% bonds (PIMCO's flagship fund; that guy's good enough not to get crushed when IR rise again... hopefully). No single name as I'm just trying not to miss out on the markets over the long term, no beat them.

In your case, keep in mind you need a big chunk to stay liquid (without too much risk of a loss on your capital) because you will have major expenses coming in the next few years: maybe a car, maybe buy a house/apt or nicely furnish your new place, maybe a wedding, maybe tuitions, maybe just a less frugal way of living, etc. At 20, you know for sure some of those will come, you just don't know when.

 

booz and hookers. and on the serious note 50% on checking account, 25% on ETRADE and 25% to max out your retirement contibutions plan.

 

I used to have a few spreadsheets built out to calc cash flow, liquidity, etc.. but it required manual updates from me.

I use mint exclusively now. There are a few things that irk me about it though. i.e. one of my favorite restaurans continues to show up as "dry cleaners" and I have to re-categorize it every time. Kind of pain. The budget setting process is a little weak, but everything else it great.

 

Thanks for the responses. I've been hearing about mint for a long time now, and I think I even created an account a couple of years ago (but haven't checked it since), but I'll give it a second shot. Didn't know I could export the data to excel.

I'm gonna toy around with it for a bit, but anyone have any useful tips for using it, or is it pretty simple with no hidden functions?

Remember, once you're inside you're on your own. Oh, you mean I can't count on you? No. Good!
 

Is Mint.com available in Europe at this point? Any tips besides this app?

I'm talking about liquid. Rich enough to have your own jet. Rich enough not to waste time. Fifty, a hundred million dollars, buddy. A player. Or nothing. See my Blog & AMA
 

if this is a joke, I fell for it...

  1. model is clean

  2. kudos for wanting to plan this far in advance

  3. put some money towards an emergency fund (http://www.wallstreetoasis.com/forums/the-last-what-should-i-do-with-my…)

  4. I personally think inflation assumption is too low, while CPI prints at around 2 nowadays, your real cost of living will increase more than this (to be super conservative, I'd model 4%)

  5. no idea how you can spend only $500 on groceries & dining in any city a month

  6. no clue if your raise expectations are reasonable, you're anticipating a 21% raise on salary and a 33% increase in bonus after your first year? I'm not in IB, but that sounds a bit lofty.

  7. please PM me the city you live in where you can find a 1br for 1k a month and still make NYC income. if the rent isn't section 8, I may consider moving ;)

I realize you were bored, but I think you're getting way too detailed. if you're OCD, you will get super stressed out if you don't abide by this budget every month. if I were you, I would focus on the savings portion of it, not the rest. and focus savings on the portion you can control, like percentage. if you don't get your expected bonus/raise every year, you will not hit your net worth goals. focus on the controllable. if your goal is to spend 20% of what you make, great! that's easier to stick to than what you're talking about. once your income goes up, if you keep your spending down, maybe you can just bump the percentage up (say something like once I hit 100k, I want to save 30% of what I make, at 200k, 40%, and so on). I'm a big believer in enjoying your resources (even though I don't get paid when people do that), but I didn't see a budget for vacation or fun. take a trip every once in a while, if you make a ton of money over time and save diligently, the difference in experiences and overall happiness you get from taking annual trips to the difference in your estate at death will be a rounding error.

 

Are you not going to buy a new car at any point in the next ten years? I think you are grossly underestimating extra expenses. Think: Christmas presents for family, travel, medical expenses if you get sick, ext. as stated above 2% inflation is not even close to what you should be putting in the model, I would do 3-4% as stated above. Also some things you have to think about, you may not pay any tax on investments if you hold long term

 

@"thebrofessor" I'll definitely keep in mind the emergency fund and factor in 4% inflation. As for groceries, I plan to maximize my usage of Seamless every day. I plan on using the extra money to buy other meals (for lunch and weekends) so most of the money I spend in this category will go towards home essentials and not groceries. Also as a college student I regularly spent $150/every 2 week on groceries in a large metropolitan city, so for me $500 doesn't seem a stretch considering I will be at home even less now

As far as the salary expectations go, the analysts #'s were definitely confirmed to me by the others. The pay for associates and VPs was taken off of estimates on this site and others (post-recession, of course)

And I'll definitely make sure to follow the advice to not sweat the nickels and dimes! I set aside $12k a year under other, which I hope will be enough to fulfill hangouts/vacations/gifts/etc...but will definitely be willing to go over if it brings me the utility :)

 

@"ct banker" that's a good point for the car and inflation, will definitely add that in. My current car is actually only 2 years old but I will add in that expenditure near the tail end of the projection period.

For gifts and other expenses...I set aside an additional $12k/year so hopefully that is enough to cover anything I did not think of. I am not really clear how employer medical insurance works, so I may add that into the model to cover any uninsured claims

 

Sit deleniti blanditiis quos voluptas. Consequatur nobis et voluptas consectetur perferendis.

Laborum aut eius consequatur. Dignissimos sit eum et velit error veritatis voluptatem. Consequatur dolores a dolor cumque ab dolore consectetur. Sit eaque voluptatum quam quo aut ipsum nihil nihil.

Aperiam aut nisi dignissimos et sed in aperiam. Ipsam dolorem cumque autem aliquid eligendi consequatur quisquam.

Et exercitationem nihil minima est officiis accusamus. Ipsam ipsa quo ab ut. Aut iste velit ut sit omnis consequatur eveniet. Non facere non et. Eveniet exercitationem eos deleniti eligendi. Non voluptas amet nesciunt at ut corrupti quas.

 

Et voluptatibus et laudantium repellendus non aperiam enim. Rerum qui rem enim eius placeat adipisci. Minima ut natus vel rerum eaque autem.

Aut aperiam omnis illum. Consequatur consequatur odit placeat reprehenderit quisquam reiciendis. Corrupti harum beatae facere aut sequi unde vero. Quas doloremque modi vel dolore quibusdam numquam debitis. In magni et hic velit dolores. Sed nemo voluptates aut velit architecto numquam. Provident odit voluptate magni.

Est dicta possimus architecto ipsa. Eveniet veritatis distinctio corporis rerum quo molestiae assumenda.

Career Advancement Opportunities

June 2026 Investment Banking

  • Evercore 01 99.4%
  • Moelis & Company 01 98.8%
  • JPMorgan 01 98.2%
  • Guggenheim Partners 01 97.7%
  • Morgan Stanley 07 97.1%

Overall Employee Satisfaction

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Morgan Stanley 01 98.8%
  • Evercore 01 98.2%
  • BMO Capital Markets 12 97.6%
  • Banco Santander 01 97.1%

Professional Growth Opportunities

June 2026 Investment Banking

  • Moelis & Company No 99.4%
  • Evercore No 98.8%
  • Morgan Stanley 05 98.2%
  • JPMorgan No 97.7%
  • BMO Capital Markets 12 97.1%

Total Avg Compensation

June 2026 Investment Banking

  • Vice President (14) $434
  • Associates (43) $259
  • 3rd+ Year Analyst (8) $210
  • 2nd Year Analyst (22) $179
  • Intern/Summer Associate (13) $156
  • 1st Year Analyst (75) $151
  • Intern/Summer Analyst (67) $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
BankonBanking's picture
BankonBanking
99.0
3
kanon's picture
kanon
99.0
4
Secyh62's picture
Secyh62
99.0
5
CompBanker's picture
CompBanker
98.9
6
DrApeman's picture
DrApeman
98.9
7
dosk17's picture
dosk17
98.9
8
Betsy Massar's picture
Betsy Massar
98.9
9
GameTheory's picture
GameTheory
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...”