Building Strong Credit Before You Buy a Home

Your credit score is just one piece of the puzzle lenders review when evaluating a mortgage application, but it plays a real role in shaping your loan options, interest rate, and overall borrowing costs. Since strengthening your credit doesn't happen overnight, it pays to get started well before you're ready to make an offer. Tools like Credit Karma can help you keep an eye on your accounts and track changes over time. For your official reports from all three nationwide credit bureaus, head to AnnualCreditReport.com and follow each bureau's process for disputing anything that looks inaccurate.

The Basics of How Credit Works

Your credit history is essentially a record of how you've managed your reported accounts and debts over time. Creditors report account activity to one or more credit bureaus, and credit-scoring models use that data to estimate how risky it might be to lend to you. Keep in mind that different lenders and scoring models don't always weigh the same information identically.

Three Categories of Credit

Revolving credit: A line you draw on, pay down, and draw on again — think credit cards and lines of credit.

Installment credit: A lump sum repaid through fixed monthly payments — auto loans, student loans, personal loans, and mortgages fall here.

Service credit: Accounts billed monthly for an ongoing service, like utilities or a cell phone plan.

What Actually Influences Your Score

Payment history (~35%): Making on-time payments on your reported accounts is typically the single biggest factor in common FICO scoring models.

Amounts owed (~30%): This covers your balances and how much of your available revolving credit you're using.

Length of credit history (~15%): Older accounts can work in your favor, though keeping every account open forever isn't always the right move.

Credit mix (~10%): Scoring models often give some weight to having experience with both revolving and installment accounts.

New credit (~10%): A flurry of recent applications and hard inquiries can impact certain scores.

Establishing Credit With a Credit Card

For a lot of people, using a credit card responsibly is one of the more straightforward ways to build or strengthen a credit history. Paying your statement balance in full and on time helps you dodge interest charges, while missed payments or high balances can drag your credit profile down.

Getting Your First Card

Secured card: Typically built for people with limited or damaged credit. Usually requires a refundable security deposit, with fees and approval standards varying by issuer.

Student card: Some issuers design cards specifically for eligible students, though approval standards, fees, and rewards differ.

Alternative credit-building card: Certain products rely on a linked deposit account or different underwriting criteria. Read through all fees, reporting practices, and terms carefully before applying.

Once you're approved, use the card for small, everyday purchases you could pay for in cash anyway — then pay off the full balance every single month.

Becoming an Authorized User

If you're not able to qualify for a card on your own, a trusted family member or partner might be willing to add you as an authorized user on their established account. Some issuers report authorized-user activity to one or more bureaus, though not every issuer does. When it is reported, it can influence certain credit scores — but the outcome really depends on the account's history, your existing credit profile, the specific scoring model, and the lender in question. There's no guarantee this move will boost your score, and it should only be considered if the primary cardholder manages the account responsibly.

Impact on Credit Age

When an older authorized-user account gets reported, some scoring models may factor its age into your overall credit history. That said, not every model calculates account age the same way, and mortgage lenders sometimes evaluate authorized-user accounts separately during underwriting. Don't assume an older account will automatically boost your score or lead to a predictable outcome.

Impact on Available Credit

If the issuer reports the account's limit and balance, it could affect your overall revolving utilization. For instance, a reported account with a high limit and low balance might lower your calculated utilization under certain scoring models. But the reverse is equally possible — a high balance, missed payment, or other negative activity on the primary account could hurt your credit instead. Authorized users shouldn't lean on this strategy as a replacement for paying down their own balances.

Impact on Account History

Being added as an authorized user usually doesn't require submitting a new credit application, though issuer practices can vary. If reported, the account may show up as an additional line on the authorized user's credit report. More accounts don't automatically translate to a better score, and getting added to several accounts purely to game a credit score likely won't help during mortgage underwriting. Talk with a qualified loan officer about how authorized-user accounts might factor in before relying on this approach.

Pay Every Bill On Time, Every Time

At minimum, make the required payment by the due date. Paying your statement balance in full can help you sidestep interest charges when your card offers a grace period. Autopay and account alerts are useful safety nets against missed payments, but you should still double-check each statement for accuracy.

Keep Your Utilization Low

Credit utilization measures your reported revolving balances against your available revolving limits. While many financial educators point to staying under 30%, that number isn't a hard-and-fast rule, and no single utilization percentage works identically across every scoring model. Generally speaking, lower reported balances tend to help — as long as you keep paying on time and avoid piling on unnecessary debt.

Consider Requesting a Limit Increase

Once you've built a solid payment history, it may be worth asking whether you qualify for a higher limit. A higher reported limit can lower your utilization, provided your balances don't creep up too. Before requesting an increase, ask whether the issuer will run a hard inquiry, and remember that extra available credit isn't extra spending money.

Building Credit Without a Credit Card

Stay current on your existing reported accounts. Consistent, on-time payments help establish a positive track record.

Look into a credit-builder loan. These are specifically designed to help people establish payment history, though interest rates, fees, qualification standards, and bureau reporting practices vary by lender. Always confirm where the lender reports before signing up.

Explore optional bill-reporting services. Some services can add eligible utility, phone, or streaming payments to certain credit files, though the impact depends on the bureau, scoring model, and lender involved.

One important caution: never take out a traditional loan solely for the purpose of building credit. If you don't actually need the money, don't borrow it.

What Mortgage Lenders Look For

Pull your reports from all three nationwide credit bureaus and dispute anything you believe is inaccurate — though keep in mind corrections may or may not move your score.

Bring past-due accounts current whenever possible, and keep making your required payments on time going forward.

Work on chipping away at revolving balances, but don't drain the funds you'll need for closing costs, reserves, or emergencies in the process.

Talk to a loan officer before applying for new credit, closing accounts, shifting debt around, or making any other major credit moves.

Don't assume one strategy applies universally across every loan program. Mortgage underwriting weighs credit alongside income, debt, assets, employment, and several other factors.

Credit requirements shift depending on the lender, loan program, property type, and the rest of your application. FHA-insured financing, for example, may be open to some borrowers with lower scores than certain conventional programs allow, though individual lenders can set their own additional requirements. Indiana's down-payment assistance program standards can shift as well — check out our first-time home buyer programs page and confirm current requirements with IHCDA and a participating lender. Veterans should also take a look at our VA home loan options; while the U.S. Department of Veterans Affairs doesn't set one universal minimum credit score, individual lenders may still apply their own.

Frequently Asked Questions

How long does building credit actually take?

Many FICO scoring models generally need at least one account open for six months or longer, along with at least one account reported within the last six months. Beyond that, the timeline for improving your score varies quite a bit depending on what's in your credit reports and which scoring model is being used.

What credit score do I need to buy a house?

There's no single magic number that applies to every mortgage. Minimums shift by lender and loan program, and approval also hinges on income, debt-to-income ratio, assets, employment, property eligibility, and other underwriting considerations. A higher score can open the door to better loan options or pricing, but it doesn't guarantee approval or any particular interest rate.

Does checking my own credit hurt my score?

No — reviewing your own report or score is generally considered a soft inquiry and won't lower your score. A hard inquiry typically only happens when you apply for credit or authorize a lender to pull your report as part of an application.

Should I pay off collections before I apply?

Don't assume every collection needs to be paid off right away. Paying one doesn't necessarily remove it from your report or raise your score, and mortgage guidelines vary from program to program. Check with your loan officer about how a specific account might affect your loan before making a payment or settlement, and always keep written records of any agreement you reach.

Will closing a credit card help my score?

Closing a card can shrink your available revolving credit and potentially raise your utilization. That said, keeping every account open forever isn't always the smartest move, especially if it comes with fees, tempts overspending, or simply no longer fits your needs. Talk to a loan officer or qualified financial professional before making any major account changes ahead of a mortgage application.

Find Out Where You Stand

A qualified loan officer can take a look at your credit profile, walk you through which factors might affect a mortgage application, and talk through possible next steps. No one can promise a specific score increase, approval decision, interest rate, or timeline.

Important Disclosure: Stefano Belmonte is a licensed real estate broker and is not a mortgage lender, loan officer, credit-repair organization, attorney, accountant, tax advisor, or financial advisor. This page provides general educational information and is not individualized financial, legal, tax, mortgage, or credit advice. Credit-reporting practices, scoring models, underwriting guidelines, rates, fees, and assistance-program requirements vary and may change. No credit-score increase, mortgage approval, interest rate, loan term, or timeline is guaranteed. Verify information with the appropriate credit bureau, creditor, IHCDA, and a qualified participating lender before acting.