Nobody hands you a manual for this when you land. Opening a bank account in the US, getting a Social Security Number, and building credit from zero — here’s the real timeline of how it happened, and how it compared to doing the same things in Korea and Germany.
Getting the SSN
The earliest available appointment at the Social Security office was about two weeks after I arrived, so I booked the first slot I could get. I brought my passport, my I-94, and the completed application form.
Then came the part that cost me the most time: I made a mistake entering my address on the form. The day after applying, I spent the entire day on the phone and in person with the SSA office trying to get it corrected. About ten days after that, the SSN finally arrived.
Opening a Bank Account — Before the SSN Even Arrived
You don’t actually need the SSN in hand to open an account. I opened checking and savings accounts within the first few days of arriving, using a Korean-speaking banker at a branch I’d specifically sought out for that reason. A debit card followed about 8 days later. Once the SSN came through, I went back and updated the account with that information.
Building Credit From Zero
About three weeks after updating my SSN on file, I applied for a basic starter credit card — a Chase Freedom card. That became the starting point for a US credit history, since none of my credit history from Korea or Germany carries over here.
How It Compared Across Three Countries
Opening an account
- Korea: no friction at all, as a citizen.
- Germany: straightforward, handled through my employer’s relationship with the bank.
- US: the SSN was the real bottleneck — having a Korean-speaking banker to walk through it made it manageable.
Using a card
- All three countries: using a card day-to-day feels about the same.
- Germany: plenty of local shops, especially early on, simply didn’t take credit cards.
- US: the harder part isn’t using a card, it’s meeting the requirements to get approved for one and start building credit in the first place.
Sending money — this is where the three countries differed the most.
- Korea: transfers are instant, and it’s easy to confirm both sides of the transaction right away.
- Germany: transfers typically take 2–3 days, sometimes over a week, and it’s often unclear whether the money actually arrived until it does.
- US: faster than Germany, but the process still isn’t always transparent, and transfers don’t move over weekends.
Closing an account
- Korea: can be done entirely online.
- Germany: requires a signed cancellation request mailed in — still, as far as I know, even now.
- US: haven’t closed one yet, so no comparison to offer there.
If You’re Doing This Yourself
Book the SSA appointment as early as you can, because the wait alone can eat up a couple of weeks. Look over the address field on the form twice — that one typo cost me more time than everything else in this process combined. And don’t wait around for the SSN to open a bank account: start that in parallel, then update your information once the SSN shows up.
Frequently Asked Questions
Do you need an SSN before opening a bank account in the US?
No. I opened checking and savings accounts within my first few days here, before my SSN had even arrived, using a Korean-speaking banker at a branch I chose specifically for that reason.
How long does it take to build credit in the US as a new immigrant?
None of my Korean or German credit history carried over, so I started from zero. About three weeks after my SSN was on file, I qualified for a basic starter card, which became the real starting point.
Related reading:
If your kids weren’t born in the US, SSN isn’t an option for tax filing — here’s how we got them ITINs instead.
For the fuller professional journey behind this move, see From Seoul to Frankfurt to Georgia.