My first summer in New York, I took home $3,800 a month. Rent was $2,100. Groceries and transit ran another $400 or so. That left me with $1,300 to cover everything else and still try to save something. It was not comfortable, but I made it work. More importantly, it completely reset how I think about cost of living math before accepting any job offer.
That summer taught me more about personal finance in three months than a semester of coursework did. Not because I was struggling, but because every dollar had a visible destination and I had to make deliberate choices about which ones were worth it.
If you’re heading into a big city internship this summer, here’s what actually matters.
The Housing Number Is Everything
Seriously, nothing else comes close. If you get your housing wrong, the rest of the budget is just damage control.
The standard advice is to keep housing under 30% of your gross income. In New York or San Francisco, that math often doesn’t work unless you’re making serious money or sharing a place with multiple people. My approach is to lock in housing first and build the rest of the budget around what’s left, not the other way around.
Corporate housing stipends are worth taking if your company offers them. If they give you $2,500 a month and you find a room for $1,800, you keep $700. That’s real money. If they offer a furnished intern apartment instead, do the math on whether the flexibility of your own place is actually worth what you’d be giving up.
If you’re finding housing on your own, intern Facebook groups specific to your city are legitimately useful. Not glamorous, but they’re how a lot of people find sublets from other interns who just finished. I found my second summer place through a Tulane alumni network post, which cost me zero dollars in broker fees. In New York especially, broker fees can run 10 to 15% of annual rent. Avoiding that is worth spending real time on.
Splitting a two or three bedroom is almost always the right move. A one bedroom in Manhattan that costs $3,200 becomes $1,600 each in a two bedroom, and often the two bedroom is only $3,400 total. The math rewards you for having a roommate.
Where Your Day-to-Day Money Actually Goes
Once housing is handled, the bleed comes from small stuff that adds up faster than you’d expect.
Food is the biggest variable. You can spend $800 a month eating out constantly in a major city, or you can spend $250 cooking most meals and being selective about when you go out. I land somewhere in between. The trick is not trying to never eat out, it’s being deliberate about which meals are worth it. A $22 work lunch every day is $440 a month. Making lunch four days a week and going out on Fridays cuts that to somewhere around $130. That’s $310 back in your pocket monthly from one habit change.
Grocery strategy matters more in a city than it does anywhere else because stores vary wildly on price. A Whole Foods in Midtown and an Aldi in a residential neighborhood are not the same experience or cost structure. Knowing which stores actually stretch your budget is worth figuring out in the first week, not the last.
Transit is mostly fixed once you know your commute. In New York, a monthly unlimited MetroCard runs $134. If you’re walking distance from the office, you might not need it at all. Either way, price it out before assuming.
Subscriptions are where people get quietly drained. Streaming services, gym memberships you signed up for optimistically, food delivery apps with monthly fees. Do an audit in the first two weeks. I cut two subscriptions I’d forgotten I was paying for and recovered $27 a month. Not life changing, but it was genuinely just waste.
Make the Money You Do Save Actually Work
This is where I think most interns leave real money on the table. They save a little, park it in a checking account earning nothing, and call it a day.
If you don’t already have a high yield savings account, open one before your first paycheck hits. I use Marcus by Goldman Sachs for my emergency fund. The current APY is around 4.10%. That’s not going to make you rich, but it’s meaningfully better than the 0.01% most big bank checking accounts pay. On $3,000 sitting in savings over a summer, that difference is real money for doing nothing differently.
For anything beyond a basic emergency cushion, a Roth IRA is worth thinking about if you have earned income from your internship. I opened mine at 19 through Fidelity with $400 from my first paycheck that felt like real money. The process took about 20 minutes and was completely anticlimactic. That was the point. Fidelity has no account minimum for a Roth IRA, no annual fee, and FSKAX, the Fidelity Total Market Index Fund, has an expense ratio of 0.015%. You’re not paying anyone to manage your money. The 2026 Roth IRA contribution limit is $7,000, and contributions are capped at your actual earned income for the year, so whatever you make this summer, you’re eligible to contribute up to that amount.
The earlier you get money into a Roth IRA, the more years of tax-free compounding you get. That matters a lot more at 21 than most people realize.
On the credit card side, if you’re not earning rewards on your spending, you’re leaving money on the table. My daily driver right now is the Chase Freedom Flex. No annual fee, 5% cash back on rotating quarterly categories, 3% on dining and drugstores. The variable APR runs from 19.99% to 28.74% depending on your credit, but that number doesn’t matter if you pay in full every month, which you should be doing. Chase has also run welcome bonuses of $200 cash back after spending $500 in the first three months, which is easy to hit in a city.
If your credit isn’t there yet for the Freedom Flex, the Discover it Student card is a solid starting point. It’s what I opened first. No annual fee, 5% cash back on rotating categories, and Discover matches all the cash back you earn in your first year automatically. It’s a real card with real rewards, not a placeholder.
The Mindset Piece Nobody Really Talks About
Big cities are expensive, but they’re also really good at making you feel like spending is normal and necessary. Everyone around you is going out, taking Ubers, buying $16 cocktails on a Tuesday. The social pressure is real even when nobody is saying anything explicitly.
I’m not going to tell you to skip the social stuff entirely. That’s not realistic and honestly it’s not the right call. The internship experience is partly about building relationships, and some of that happens outside the office.
What I will say is that there’s usually a version of every social activity that costs significantly less without being obviously cheaper. Grabbing drinks at happy hour instead of at 10pm. Suggesting a park or a free museum instead of another bar. Cooking dinner at your place once a week and splitting the cost four ways. Eating smart doesn’t have to mean eating alone or eating badly. The people worth spending time with won’t care about the setting.
The interns who leave the summer with real savings aren’t the ones who said no to everything. They’re the ones who were intentional about what they said yes to. There’s a difference between choosing where your money goes and just watching it leave.
You’ve got a few months and a real paycheck. That combination doesn’t last forever. Making it work in a high cost city is genuinely good practice for the rest of your career, at least in my experience.
I’m not a financial advisor, just a finance student sharing what I’ve actually done and learned. Do your own research before making any financial decisions.
Frequently Asked Questions
Q: How much should an intern realistically save over a summer? Even in an expensive city, saving $1,500 to $3,000 over a 10 to 12 week internship is achievable if housing is shared and food spending is managed. The number matters less than building the habit of saving something before spending the rest.
Q: Is it worth opening a Roth IRA with internship income? Yes, and the earlier the better. Fidelity has no minimum to open one, and contributions from earned income grow tax-free for decades. Even $500 or $1,000 contributed at 21 is worth significantly more than the same contribution at 35.
Q: What’s the best bank account for an intern living in a big city? A no-fee checking account for daily spending paired with a high yield savings account works well. Marcus by Goldman Sachs is currently paying around 4.10% APY with no minimum balance and no fees, which beats most traditional savings accounts by a wide margin.
Q: How do I avoid overspending on food in an expensive city? Pick two or three cheaper grocery stores near you in the first week and make most meals at home. Reserve eating out for social situations where it actually adds value, rather than defaulting to it out of convenience or laziness.
Q: Should I use a credit card for everyday spending as an intern? If you can pay the full balance every month, yes. A card like the Chase Freedom Flex earns 5% on rotating categories and 3% on dining with no annual fee. Using it for normal spending and paying it off monthly means you earn rewards on money you were going to spend anyway.