How to Improve Your Credit Before Buying: A 90-Day Plan

Updated October 2026 · By Jet Ameti, NMLS #757627

If you’re planning to buy in the next few months, your credit score is one of the few parts of your mortgage you can still change. You can’t change the bond market or your income history — but you can change what your credit report says. Here’s a realistic 90-day plan, plus the traps that undo people’s progress.

Days 1–14: Know exactly where you stand

• Pull your reports from all three bureaus (Equifax, Experian, TransUnion) — you’re entitled to free copies. Read them line by line, not just the scores.
• Flag every error: accounts that aren’t yours, balances that are wrong, late payments you actually made on time, collections past the reporting window. Errors are common, and mortgage underwriters will make you explain or resolve them anyway.
• List every card with its balance and limit. You’ll need this for the utilization work below.

Days 15–45: Attack utilization

Credit utilization — the percentage of your available credit you’re using — is one of the fastest-moving parts of your score. High utilization signals risk; low utilization signals control. The playbook:

• Pay revolving balances down aggressively, targeting well under one-third of each card’s limit — lower is generally better, and per-card utilization matters as much as the total.
• Don’t close the cards you pay off. Closing a card deletes its credit limit from your utilization math, which can actually raise your utilization and hurt your score.
• Time it right: card issuers typically report your balance once a month, usually around the statement date. Paying a card down before the statement closes — not just before the due date — gets the lower balance reported faster.

Days 15–60: Dispute real errors

For every genuine error you found, file disputes with the relevant bureau(s) — in writing, with documentation. Legitimate disputes on real errors are your right, and clearing a wrongly-reported late payment or a stranger’s collection can move your score meaningfully. Two cautions:

• Only dispute what’s actually wrong. Frivolous disputes on accurate negative items waste your time, and mortgage underwriters can see dispute flags — open disputes on a credit report can actually delay your loan while they’re resolved.
• Handle collections strategically. Old paid collections sometimes matter less than you’d think, while paying a very old collection can occasionally lower a score by refreshing its activity date. Talk to your loan officer before paying old collections — the right move depends on the details.

Days 1–90: The don’t list (most important)

More mortgages are delayed by things borrowers did in the months before applying than by anything on their old reports:

• Don’t open new credit — no new cards, no furniture financing, no car loan. New accounts lower your average account age and add inquiries; new payments raise your debt-to-income ratio.
• Don’t close old accounts. That old card you never use is helping your utilization and your credit history length. Leave it open.
• Don’t co-sign anything for anyone. A co-signed loan is your debt as far as a mortgage underwriter is concerned.
• Don’t make large undocumented deposits. Underwriters must source large deposits — a mysterious cash deposit can stall or sink your file. Keep a paper trail for every dollar that moves (more in 7 mistakes that kill approvals).
• Don’t finance anything “for the new house.” The appliances can wait until after closing.

What about rapid rescoring?

If you’ve paid balances down but the bureaus haven’t caught up, your loan officer may be able to order a rapid rescore — an expedited bureau update, usually completed in days rather than a full cycle, with proof of the payoff. It’s a legitimate tool, not a trick — but it only reflects real, documented changes. Anyone selling you a shortcut beyond that is selling you trouble.

Day 90: Reassess with a professional

After 90 days of clean behavior, have a loan officer pull your mortgage scores and tell you which pricing band you’re in. Sometimes you’re done. Sometimes one more targeted month gets you over a line that changes your pricing. And sometimes your score is already fine and the real constraint is elsewhere — in which case I’ll tell you that too, because waiting when you don’t need to has its own cost.