How to Improve Your Credit Score (ITIN Holders)

Whether your score is in the 500s or climbing through the 600s, the same five FICO factors drive every point you gain or lose. Here's exactly what to do — and what to avoid — to move your score upward.

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Updated June 5, 2026

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Quick Answer

The fastest legitimate ways to improve a credit score: pay down high-balance cards (lowers utilization, can show results in one billing cycle), dispute errors on your reports (30 days to resolve), and never miss a payment (payment history is 35% of your FICO score). Don't close old cards, limit new applications, and add accounts gradually to build credit mix.

What actually moves a credit score?

FICO scores are calculated from five weighted categories. Understanding the weights tells you where to concentrate your effort. You can't influence all five equally quickly — but you can influence all five deliberately:

Factor	Weight	How to improve it
Payment history	35%	Pay every bill on or before the due date, every month without exception
Amounts owed (utilization)	30%	Keep card balances below 30% of limit; below 10% is better
Length of credit history	15%	Keep old accounts open; don't close your first card
New credit	10%	Space out applications; apply only when you genuinely need credit
Credit mix	10%	Have at least one installment account (loan) and one revolving account (card)

What raises your score — and what lowers it?

Action	Effect on score	Speed
Pay in full and on time	Strong positive (+)	Builds over months
Pay down card balance below 30% utilization	Positive (+)	1–2 billing cycles
Dispute and remove an error	Can be large positive (+)	~30 days
Add a new account (authorized user or credit-builder loan)	Positive over time (+)	3–6 months
Miss a payment by 30+ days	Significant negative (−)	Immediate; stays 7 years
Max out a credit card	Negative (−)	Immediate; reverses when paid down
Close your oldest account	Moderate negative (−)	Next reporting cycle
Apply for several cards at once	Small negative (−) per inquiry	Immediate; fades in 12 months
Account sent to collections	Severe negative (−)	Immediate; stays 7 years

How does utilization affect your score?

Utilization — the ratio of your current balances to your total credit limits — is the second-largest factor in your FICO score at 30%. Unlike payment history, which builds slowly over time, utilization changes are reflected almost immediately in your score. If you're carrying $800 on a $1,000 limit card (80% utilization) and you pay it down to $200 (20% utilization), your score will likely jump within one to two billing cycles when the lower balance is reported. The general guideline is to stay below 30% at all times. Getting below 10% produces the best scores. If your limit is too low to easily stay under 30%, requesting a credit-limit increase — without spending more — instantly improves your ratio.

Why is disputing errors so important?

Studies by the Federal Trade Commission have found that a significant share of credit reports contain errors. ITIN holders face a higher risk of mixed-file errors — accounts belonging to someone with a similar name or address appearing on your report. Any inaccurate negative item (a late payment that wasn't yours, a collection account already paid, a balance that's wrong) is directly lowering your score by information that isn't accurate. You have the right under the Fair Credit Reporting Act to dispute any item you believe is wrong. The bureau must investigate and respond within 30 days. If it can't verify the information, it must remove it. Pulling your report from all three bureaus — Experian, Equifax, and TransUnion — and reviewing it carefully is the starting point. See our credit bureaus guide for the dispute process at each bureau.

What should ITIN holders avoid?

A few common mistakes disproportionately hurt people who are still building their files:

Closing the first card you opened. Length of history is 15% of your score. Your oldest account, even unused, anchors the average age of your accounts. Keep it open.
Applying for multiple cards quickly. Each application is a hard inquiry. Spacing applications at least six months apart limits the score impact. Once you're established, a single well-chosen new account is fine; a burst of applications signals financial stress to the scoring models.
"Credit repair" companies. Legitimate negative information — a real late payment, a real collection — cannot be removed from your report before its legal expiration date (7 years for most items). Any company promising to "erase" accurate negative history is offering something illegal or ineffective. Disputing genuine errors yourself is free and achieves the same result as any third-party.
Paying only the minimum. Minimum payments keep the account current but leave high balances — and high utilization — in place. Paying in full is the target; if that's not possible, pay as much above the minimum as you can.

What timeline can you realistically expect?

Credit improvement is not a straight line, but these are reasonable benchmarks. Starting from a thin file or a score below 600: reaching 670 (the "good" threshold) typically takes 12 to 24 months of consistent positive behavior. Reaching 740 (the entry point for the best rates) typically takes 2 to 4 years. Every late payment sets the timeline back — protecting your payment streak is the single most important thing you can do. For tools that help ITIN holders build and maintain a strong credit profile, see our building credit guide or get matched with ITIN-friendly options.

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Common questions

How fast can I raise my credit score?

Some actions — like paying down a high-utilization card — can raise your score within one billing cycle (30–45 days). Removing errors via dispute can take 30 days once the bureau investigates. Building a strong payment history takes months of consistent on-time payments. Significant score jumps of 50–100 points typically take 3–12 months depending on your starting point.

Does paying off a card every month help?

Yes, significantly. Paying your full statement balance each month eliminates interest charges AND keeps your reported utilization low — since balances are usually reported to bureaus on your statement closing date. Even if you pay in full, a high balance at statement close shows as high utilization. Paying before the statement date keeps the reported balance even lower.

Should I close old credit cards I don't use?

Generally no. Closing an old card shortens your length of credit history (15% of your FICO score) and reduces your total available credit, which can increase your utilization ratio. Unless the card has high fees, keeping it open with a small occasional charge is better for your score.

How do I dispute errors on my credit report?

Visit the dispute portal for whichever bureau has the error — Experian, Equifax, or TransUnion — and submit a dispute with supporting documentation. The bureau is required to investigate within 30 days and remove any information it cannot verify. Dispute all three bureaus if the error appears on multiple reports.

Does applying for new credit hurt my score?

A hard inquiry from a new credit application typically drops your score by 5–10 points temporarily. Multiple inquiries for the same type of credit (like auto loans) within a short window are usually treated as a single inquiry by FICO. The impact fades within 12 months and disappears from your report after 2 years.