How a U.S. credit score works
A credit score is a number, usually between 300 and 850, that tells a lender how reliably you have repaid money in the past. Lenders use it to decide whether to approve you and what your financing will cost. If you have never borrowed in the U.S., you may have no score at all. That is not bad credit. It is simply a blank page, and a blank page can be filled carefully.
The most widely used score, FICO, is built from five things:
| What it measures | Share of score | In plain words |
|---|---|---|
| Payment history | About 35% | Did you pay every bill on time? |
| Amounts owed | About 30% | How much of your available credit are you using? |
| Length of history | About 15% | How long have your accounts been open? |
| New credit | About 10% | Have you applied for a lot of credit recently? |
| Credit mix | About 10% | Do you have different kinds of accounts? |
For a home purchase, minimums depend on the program. FHA financing can allow a score as low as 580 with 3.5% down, and many conventional programs look for 620 or higher. Halal financing providers set their own standards. A higher score usually means a lower cost, so building well is worth the patience.
Five safe ways to start from nothing
You only need one or two of these. Pick the ones that fit your situation.
A secured credit card
You give the bank a deposit, often $200 to $500, and that becomes your credit limit. Use it for one small bill each month, like your phone, and pay it off in full. Ask the bank before you open it whether it reports to all three credit bureaus (Equifax, Experian, and TransUnion). If it doesn't report, it won't help.
A credit-builder loan
Offered by many credit unions and community banks. The bank holds a small amount in a locked account while you make monthly payments, and you receive the money at the end. Your on-time payments are reported the whole time.
Becoming an authorized user
A family member with a long, clean credit history can add you to their card. Their good history can appear on your report. Only do this with someone who always pays on time, because their late payments can appear on your report too.
Getting credit for rent you already pay
Some landlords and rent-reporting services send your rent payments to the credit bureaus. Fannie Mae also allows lenders to consider a positive rent payment history for some borrowers. If you have paid rent on time for a year or more, keep your bank records: they may help.
Using an ITIN if you don't have a Social Security number
Some banks and credit unions open accounts and cards with an Individual Taxpayer Identification Number, and some lenders offer home financing to ITIN borrowers. Options are narrower and often cost more, but they exist.
Habits that grow your score
- Never miss a payment. Set up automatic payment for at least the minimum on every account. One payment 30 days late can hurt your score for years.
- Keep balances low. Try to use less than 30% of each card’s limit, and less than 10% if you can. On a $500 limit, that means keeping the balance under $150.
- Keep your first card open. Closing your oldest account shortens your history.
- Apply slowly. Each application can cause a small, temporary drop. Space new accounts several months apart.
- Check your reports. You can see all three reports free every week at AnnualCreditReport.com. Dispute anything that isn’t yours.
What to avoid
These cost families money and time every year.
- “Credit repair” companies that want payment up front. Federal law bars credit repair companies from charging before they perform the service, and nobody can legally remove accurate negative information. You can dispute errors yourself, for free.
- “CPN” or “new credit identity” offers. Using a number other than your own SSN or ITIN on a credit application is fraud. Walk away.
- Paying for your credit report. The official site is free.
- Co-signing for someone else unless you are ready to make every payment yourself. Their missed payments become yours.
- Stacking “buy now, pay later” plans. Some now appear on credit reports, and missed payments can hurt you.
A note about immigration status
Which financing you can use can depend on your documents and status, and every lender has its own rules. That conversation belongs with a licensed lender, privately. We never ask about immigration status on this site, and you don’t need to share it to join the Academy or ask a question.
How long does it take?
To generate a FICO score, you generally need at least one account that has been open for six months and reported in the last six months. After that, most families who follow the habits above are in a much stronger position within 12 to 24 months. Starting today, even if you plan to buy in two years, is the single best step you can take.
Sources you can check
- AnnualCreditReport.com: the official, free source for your reports from all three bureaus.
- CFPB: Credit reports and scores: how scores work and how to dispute errors.
- FTC: Fixing your credit: your rights and how to spot credit repair scams.