Build a U.S. credit history from zero

Credit histories do not cross borders. However well you managed money at home, in the U.S. you begin with no file at all — which is treated as worse than a mediocre one, because there is nothing to assess.

This matters more than it sounds. Landlords, mobile phone carriers, insurers and employers all check credit. A thin file means larger deposits and higher premiums.

Time to a usable score

About 6 months

Score range

300–850; above 700 is good

Cost

Free — a secured card requires a refundable deposit

Biggest factor

Paying on time, every time

The routes that work

A secured credit card. You put down a deposit — say $300 — and that becomes your credit limit. The card reports to the credit bureaus exactly like a normal card. After 6 to 12 months of on-time payments most issuers refund the deposit and convert it to a regular card. This is the standard route and it works.

A card from a bank that considers foreign history. A few issuers will use your credit record from certain other countries when you apply within your first year. Worth asking about, but do not rely on it.

Becoming an authorised user on the card of a family member with good credit. Their payment history is added to your file. Only do this with someone whose habits you trust — their late payment lands on your record too.

A credit-builder loan from a credit union. You "borrow" a small sum that sits in a locked savings account while you repay it. At the end you get the money and a year of payment history.

Rent and utility reporting. Several services add on-time rent, phone and utility payments to your credit file for a small fee or free through some landlords. It builds a file from payments you are already making — worth setting up when you first put utilities in your own name.

Before any of these, you need an account: see opening a U.S. bank account, which can usually be done with a passport and an ITIN.

What actually moves the score

Factor	Weight	What to do
Payment history	~35%	Never pay late. Set up autopay for at least the minimum.
Amounts owed	~30%	Keep balances under 30% of your limit — ideally under 10%.
Length of history	~15%	Never close your first card.
New credit	~10%	Do not apply for several cards at once.
Credit mix	~10%	Takes care of itself over time.

Read your report, not just your score

The score is a summary; the report is the evidence behind it. You are entitled to free reports from the three credit bureaus, and checking your own never affects your score.

What to look for: accounts you did not open, addresses you have never lived at, a name spelled in a way that suggests two files have been merged, and balances that are wrong. Errors are common, and they are more common for people whose names do not fit the one-given-name-one-surname assumption most systems make.

Disputes are made free, directly with the bureau, and it must investigate — usually within 30 days. Do it in writing and keep proof.

Freezing your credit is also free, takes minutes, and stops anyone opening an account in your name. It is the single most effective protection against identity theft, and you can lift it temporarily when you actually apply for something.

What to avoid

• "Credit repair" companies. They charge for disputes you can file free, and cannot remove accurate information.
• Carrying a balance to "build credit". This is a myth. Interest is not required to build a history; paying the statement in full each month reports exactly the same.
• Store cards opened at a checkout for a discount. High rates, low limits, and a hard credit enquiry.
• Closing the first card once a better one arrives. It is the account setting the length of your history, and closing it also cuts your total available credit, which raises the utilisation ratio on everything else.

Six months of one secured card, used lightly and paid on time, gets most people to a score that changes what they are offered — for a deposit they get back.