What lenders actually look at when you apply for a mortgage

Mortgage lenders use your credit score, payment history, and debt-to-income ratio to decide whether to lend to you and at what interest rate. A higher credit score typically means a lower interest rate, which saves you tens of thousands of dollars over the life of a loan. Most lenders require a minimum score of 580 to 620, though scores above 740 unlock the best rates.

Beyond the number itself, lenders pull your full credit report and look for patterns: Do you pay on time? Do you carry high balances? Have you defaulted, filed bankruptcy, or had accounts sent to collections? A single missed payment can lower your score by 100 points or more, while accounts in collections can stay on your report for seven years.

Your debt-to-income ratio—the percentage of your monthly income that goes to debt payments—also matters. Most lenders want this below 43 percent. If you earn $5,000 a month, that means your total monthly debt payments (car loans, credit cards, student loans, and the new mortgage) should not exceed $2,150.

Key Takeaways

  • Lenders look at your credit score, payment history, and how much debt you already carry relative to your income.
  • Paying every bill on time for at least six months, even small ones, begins to raise your score and shows lenders you are reliable.
  • Paying down credit card balances below 30 percent of your limit has a faster effect on your score than paying off the card entirely.
  • Accounts in collections, charge-offs, and late payments stay on your report for seven years, but their impact weakens over time if you build good habits now.
  • Checking your own credit report for errors is free once per year through annualcreditreport.com, and correcting mistakes can raise your score without changing your behavior.

How to raise your score before you apply

The fastest way to improve your score is to bring all accounts current and keep them that way. If you have missed payments, make the next one on time, then the one after that. Payment history makes up 35 percent of your credit score, so six months of on-time payments will move the needle more than anything else.

Next, lower your credit card balances. Lenders care about your credit utilization ratio—how much of your available credit you are using. If you have a $5,000 limit and a $4,500 balance, you are at 90 percent utilization, which signals risk. Paying that balance down to $1,500 (30 percent) improves your score noticeably, often within one or two billing cycles. You do not need to pay off the card entirely; 30 percent utilization is the target.

Do not close old credit cards after you pay them down. The length of your credit history matters, and closing an account removes that history from your active record. Keep the card open with a zero or very low balance.

If you have accounts in collections or charge-offs, contact the creditor or collection agency and ask about a pay-for-delete agreement. This is not may provide, but some will remove the account from your report in exchange for payment. Get any agreement in writing before you pay. If they refuse, paying the debt still helps—paid collections accounts show lenders you eventually made it right, even if the account itself stays on your report.

Checking your credit report for errors

You are may have access to to one free credit report per year from each of the three major bureaus: Equifax, Experian, and TransUnion. Go to annualcreditreport.com (the official site run by the bureaus themselves) and request your reports. Do not use third-party sites that offer "free" reports in exchange for signing up for monitoring services.

Read each report carefully. Look for accounts you do not recognize, payments marked late that you made on time, balances that are wrong, or duplicate entries. Errors are common—a payment posted to the wrong account, a closed account still showing as open, or an old account that should have fallen off after seven years.

If you find an error, file a dispute with the bureau directly through their website or by mail. Include a copy of the error, a copy of your proof (a bank statement, cancelled check, or payment confirmation), and a letter explaining what is wrong. The bureau has 30 days to investigate and respond. Correcting errors can raise your score by 50 to 100 points or more, depending on what the error was.

Building credit if you have little or no history

If you have no credit history or a very thin one, lenders may not have enough information to assess you. You can build history by becoming an authorized user on someone else's credit card (their good payment history helps your score), opening a secured credit card (you deposit money, then use the card and pay it back), or taking out a credit-builder loan from a credit union.

A credit-builder loan works backward: the lender gives you the money, but holds it in a savings account while you make monthly payments toward it. After you finish paying, you get the money back. The payments are reported to the credit bureaus, building your history. Credit unions often offer these for $500 to $1,000 with terms of 12 to 24 months.

Becoming an authorized user is faster but riskier—if the primary cardholder misses a payment, it damages your score too. Make sure you trust the person and that they have a strong payment history.

How long it takes to see results

Credit scores update monthly when the bureaus receive new information from lenders and creditors. You may see movement within 30 days of paying down a balance or making an on-time payment, but meaningful improvement usually takes three to six months of consistent behavior. A score that has been damaged by late payments or collections recovers more slowly—expect 12 to 24 months of good habits to offset serious damage.

The older the negative mark, the less it hurts. A late payment from two years ago damages your score less than one from two months ago. A bankruptcy from seven years ago has minimal impact compared to one from last year. This means waiting sometimes helps, but only if you are building good habits in the meantime. A bankruptcy from seven years ago plus six months of missed payments now is worse than the bankruptcy alone.

What to do if you cannot wait for your score to improve

If you need to buy a house soon and your score is below the lender's minimum, you have a few options. Some lenders specialize in lower-score borrowers and may work with scores as low as 500, though the interest rate will be significantly higher. A mortgage broker can shop multiple lenders to find one willing to work with your score.

You can also ask a family member with good credit to co-sign your mortgage. The co-signer's credit and income are considered alongside yours, which can help you get approved or get a better rate. The co-signer is legally responsible if you do not pay, so this is a serious commitment for them.

Another option is to save a larger down payment. A 20 percent down payment instead of 5 percent signals to lenders that you have skin in the game and are less likely to default, which can offset a lower credit score. However, saving a larger down payment takes time, which may not be realistic if you need to move soon.

Avoiding common mistakes while you rebuild

Do not apply for new credit while you are rebuilding. Each application triggers a hard inquiry, which lowers your score by a few points. Multiple inquiries in a short time signal to lenders that you are desperate for credit, which is a red flag. Space out applications by at least six months.

Do not max out new credit cards to build history. The utilization ratio applies to each card individually and to your total available credit. Using 90 percent of a new card's limit, even if you pay it off monthly, still damages your score.

Do not pay off collections accounts without a written agreement. Some collection agencies will re-age the account (restart the seven-year clock) after you pay, which keeps it on your report longer. Others will not remove it even after you pay. Get the terms in writing first.

Do not ignore accounts that are already past due. The longer an account sits unpaid, the worse the damage. If you cannot pay in full, contact the creditor and ask about a payment plan or settlement. Showing effort to resolve the debt is better than ignoring it.

Frequently Asked Questions

How much does my credit score need to be to get a mortgage?

Most conventional lenders require a minimum score of 620, though some work with scores as low as 580. FHA loans (backed by the Federal Housing Administration) may accept scores as low as 500 to 580, depending on the lender. Scores above 740 unlock the best interest rates. The higher your score, the lower your rate and the less you pay over the life of the loan.

Will paying off collections accounts remove them from my credit report?

No. Accounts in collections stay on your report for seven years from the original delinquency date, even after you pay them. However, a paid collection account looks better to lenders than an unpaid one. Before you pay, try to negotiate a pay-for-delete agreement in writing, though many agencies will refuse.

How much should I pay down my credit cards before applying for a mortgage?

Get your balances below 30 percent of your credit limit on each card. If you have a $10,000 limit, aim for a balance under $3,000. This ratio has a significant effect on your score. You do not need to pay off the cards entirely, and paying them off completely can sometimes hurt your score temporarily if it changes your credit mix.

Can I buy a house with bad credit if I have a co-signer?

Yes. A co-signer with good credit and stable income can help you get approved or get a better interest rate. The co-signer is legally responsible for the loan if you do not pay, so lenders take their credit and income seriously. However, the co-signer's debt-to-income ratio also counts toward the lender's limits, so they cannot already be carrying high debt.

How long does it take to rebuild credit enough to buy a house?

If you start from a clean slate with no negative marks, you can build enough history to may have access to for a mortgage in 12 to 18 months. If you have recent late payments or collections, expect 24 to 36 months of on-time payments and low balances to offset the damage. Older negative marks (more than two years old) have less impact, so your timeline depends on what is on your report now.