A 90-day window is long enough to move your FICO score in a meaningful way — usually 30 to 80 points if you start in the low-600s. Lenders pull a new bureau file every time you apply, so the score that matters is the one on the day you submit.
1. Pull all three bureau reports
Equifax, Experian, and TransUnion can each show different accounts, balances, and errors. Pull all three free at AnnualCreditReport.com. Roughly one in four reports contains an error serious enough to affect a credit decision, so dispute anything that is wrong — wrong balance, wrong status, accounts that aren't yours — directly with the bureau in writing.
2. Pay every revolving balance below 30%
Credit utilization is the second-largest input into your FICO score, behind only payment history. Pay every credit card and line of credit down to under 30% of its limit, and your top one or two cards under 10%. If you can't pay the balance, ask the issuer for a credit-limit increase — it lowers utilization without costing you a dollar.
3. Don't close old accounts
Length of credit history accounts for about 15% of your score. Closing a 12-year-old card you no longer use shortens your average age and shrinks your total available credit, both of which hurt the score. Leave it open; charge a small recurring bill to it so the issuer doesn't close it for inactivity.
4. Become an authorized user on a clean account
If a family member has a card that is years old, paid on time, and rarely used, ask to be added as an authorized user. The account's history is reported on your file, often within one statement cycle.
5. Limit hard inquiries to a 14-day window
Every loan or credit-card application creates a hard pull worth 2-5 points. FICO's auto, mortgage, and student-loan models bundle multiple inquiries inside a 14-day window into a single inquiry — so rate-shop fast or not at all.
6. Set up autopay on every account
Payment history is 35% of your score. A single 30-day late payment can cost 60-110 points and stay on your file for seven years. Set autopay for at least the minimum on every revolving and installment account; pay the balance manually later if you want.
When to apply
Wait until your three reports show updated balances — usually one full statement cycle after you pay things down. Then pre-qualify with a soft pull before you submit a hard application.