How long it takes to get an SSN after arriving in the US, how to open a bank account with no SSN, and when a founder needs an ITIN instead.
You can land at SFO on a Monday and have a working US phone number, a funded US bank account, and an SSN appointment on the calendar by Wednesday night. The one thing you cannot rush is the SSN itself: you should wait 10 days after entering the country before applying, and the card takes roughly two more weeks after that. So your first 72 hours are really about doing everything that does not require an SSN, which turns out to be almost everything.
This is the paperwork sprint, not the whole landing sequence. For the apartment hunt, transit, and meeting people, see our first 30 days guide. For incorporating and EINs, see legal setup.
The 72-hour plan at a glance
The optimal order is phone on day 0, bank account on day 1 or 2, SSN appointment booked now for day 10 or later. Nothing in this list requires you to already have an SSN.
| When | Task | Needs an SSN? |
|---|---|---|
| Before you board | Buy a prepaid US eSIM | No |
| Day 0 | Activate the eSIM, keep your home SIM as secondary | No |
| Day 1-2 | Open a personal bank account in a branch | No |
| Day 1-2 | Book your SSA appointment for day 10+ | No (that is the point) |
| Day 10+ | SSA appointment with original documents | n/a |
| ~Day 17-24 | SSN card arrives by mail | n/a |
Everything below is the detail on each step, plus the ITIN path if your visa makes you ineligible for an SSN.
Phone: buy a prepaid eSIM before you land
You do not need an SSN, a US credit history, or even a US address to get a phone plan: any prepaid carrier will activate an eSIM with nothing but a payment card, and you can do it from the departure lounge. Postpaid plans from Verizon, AT&T, and T-Mobile run a credit check keyed to an SSN, so skip them for now.
The cheap, credible options in 2026 are Mint Mobile (intro pricing at $15/month for the first three months on a 5GB plan, running on T-Mobile's network; as of mid-2026 a promo prices even the unlimited plan at $15/month for the first term) and US Mobile. Both activate an eSIM in minutes through an app or QR code, no shipping, no store visit.
Do this first because everything downstream wants a US number. Your bank, the SSA's online tools, landlords, and every 2FA prompt in American life assume a US mobile number. Keep your home-country SIM alive as a secondary eSIM so you can still receive 2FA codes from your old bank while you migrate.
Once your SSN arrives and you have a few months of history, you can switch to postpaid if you care. Most founders never bother.
Open a personal bank account with no SSN on day 1 or 2
Bank of America and Wells Fargo will open a personal checking account with a passport, your visa documentation, and proof of US address, no SSN required; Chase does the same but insists you come into a branch with two forms of ID. All three also accept an ITIN in place of an SSN if you already have one.
The catch is the channel, not the policy. The banks' online applications almost always hard-require an SSN because the web form was built for domestic customers. Branch staff have a separate process for foreign passports. So walk into a branch. Downtown SF branches (Market Street, FiDi) see international customers daily and will not blink.
Bring:
- Passport
- A second ID (home-country driver's license or a credit card in your name works at most banks)
- Visa documentation and your I-94 record, the electronic arrival record created when you entered the US (print it from the CBP website, it takes two minutes)
- Proof of US address: a signed lease is cleanest. If you are still in temporary housing, some branches accept a letter from your host plus their utility bill. Sort your lease first if you can.
When the form asks for an SSN, the correct answer is "applied for" or "pending." You update the bank later. This is routine.
One thing this article deliberately does not cover: your company's bank account. That is a separate track. Mercury still opens US business accounts remotely for non-US founders in 2026 with just a Delaware C-corp, an EIN, and a passport, no SSN needed, though it has tightened scrutiny and will reject registered-agent addresses and PO boxes as your business address. The full sequence is in legal setup.
The SSN: wait 10 days, then move fast
Wait 10 days after your first US entry before applying for an SSN. Applying earlier is the single most common cause of delays, because the Social Security Administration verifies your entry against DHS's SAVE database (the system SSA uses to confirm your immigration status with Homeland Security), and your arrival record can take up to 10 days to propagate. Apply on day 3 and the automated check fails, kicking your application into a manual queue that can add weeks.
The mechanics changed in early 2026. SSA launched a streamlined online application in February 2026 that lets many applicants start (and some finish) the process at ssa.gov. As a first-time applicant with foreign documents, expect the online flow to route you to an in-office appointment where you show originals. Book that appointment in advance: SSA moved to appointment-based field-office service in January 2025. Walk-ins are officially still served (SSA says it will not refuse in-person service), but without an appointment you will wait far longer, roughly 26 minutes versus 6 on average, and you may be asked to come back with a booked slot. SF-area offices book out, so make the booking on day 1 or 2 for a slot on day 10 or later. That is the whole trick.
Bring your passport, I-94, and your work-authorization evidence (for an O-1, your I-797 approval notice). The application is free. Anyone charging you to "expedite" an SSN is selling you nothing.
After your appointment, the card typically arrives 7 to 14 days after SSA receives DHS verification, with 2 to 4 weeks being the realistic end-to-end budget. Total timeline from wheels-down to card-in-hand: figure three to four weeks if you execute cleanly.
SSN or ITIN: your visa decides
If you hold an O-1, H-1B, or L-1, you are SSN-eligible the day you arrive; F-1 students only qualify with evidence of employment (an on-campus job offer, or CPT/OPT work authorization, the two permits that let students work); and B-1/B-2 visitors cannot get an SSN at all, which makes the ITIN their only US tax ID. If you have not picked a visa yet, start with the founder visa decision tree; if you are on the O-1 track, the O-1 cheat sheet covers the documents you will be showing SSA.
The ITIN (Individual Taxpayer Identification Number) is the fallback. The IRS issues it regardless of immigration status via Form W-7, but it is slow: about 7 weeks standard processing in 2026, stretching to 9 to 11 weeks if you file during peak season (January 15 through April 30) or from overseas. That timeline means the ITIN is never a first-72-hours task. If you need one, the practical paths are filing the W-7 with your first US tax return or going through a Certified Acceptance Agent, who verifies your passport so you do not have to mail it to Austin.
Know what an ITIN is and is not. It gets you bank accounts, some credit cards, and tax compliance. It does not authorize work, and it is not a substitute for an SSN once you become SSN-eligible. Founders scouting SF on a B-1 before committing should read our advice for international founders before spending 11 weeks on paperwork they may not need.
What you do not need an SSN for (almost everything)
You do not legally need an SSN to sign a lease, get a phone plan, open a bank account, or incorporate and get an EIN for your company. Every one of those systems has a documented path for "applied for" or foreign-ID applicants, and the people who tell you otherwise are usually reading a web form, not the law.
Where the SSN actually matters:
- Building a US credit history efficiently (most credit cards and all credit bureaus key off it)
- W-2 payroll once you start paying yourself (you can begin work while it is pending and give your employer, even your own startup, the number when it arrives)
- A California driver's license application, where it saves you an extra ineligibility step
So do not let a missing SSN block anything in week one. Mark it pending, keep moving, and backfill the number everywhere once the card shows up.
The one automatic-SSN shortcut left in 2026
One automatic-issuance shortcut survives: if you are filing an adjustment of status (Form I-485, the application for a green card from inside the US), answer yes to the SSN questions on the form and SSA will issue and mail your SSN automatically, no office visit needed. The old equivalent for work-permit (EAD) applicants is gone: SSA paused automatic issuance for EAD applicants in March 2025 and never reinstated it, and USCIS removed the SSN-request option from Form I-765 entirely in the 08/21/25 edition, the only edition accepted since March 2026. A spouse applying for an EAD now needs a regular SSA appointment like everyone else.
Most nonimmigrant founders will not touch this path (an O-1 approval does not run through it), but if you or your cofounder is filing an I-485, answer the SSN questions and cross the SSA appointment off the list.
After 72 hours
By Thursday you should have a working number, a bank account, and an SSA slot booked for next week. That is the entire dependency chain unblocked. The next moves are the apartment (where your new bank balance and proof of funds do real work), transit, and getting into rooms with people, all covered in the first 30 days guide. On the company side, your EIN and business bank account run in parallel and need none of the personal paperwork above.
The meta-lesson of week one in America: almost nothing requires the document everyone tells you it requires. It just requires showing up in person with a passport and refusing to be turned away by a web form.
Numbers verified July 2026. SSA procedures, ITIN processing times, and carrier pricing change fast, so confirm current figures before relying on them.
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This guide was researched and written with AI assistance for justmovetosf.com, with every number checked against the sources below in July 2026. Things change fast and mistakes are possible: do your own research, and for visa, tax, or legal decisions talk to a licensed professional.
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