What Are the Credit Score Impacts on Home Loans?

Your credit score influences which lenders will assess your home loan application, the interest rate you receive, and the deposit size you need to avoid lenders mortgage insurance.

Most borrowers focus on saving a deposit and proving their income, but your credit file often determines whether you qualify for discounted rates or need to provide additional equity. A missed phone bill from three years ago can shift your approval from a major bank offering a 6.15% variable rate to a non-major lender offering 6.89%, even when your income and deposit remain identical. The difference in repayments on a $600,000 loan over 30 years is roughly $280 per month.

How Lenders Use Your Credit Score During Assessment

Lenders retrieve your credit file from Equifax, Experian or illion within 24 hours of receiving your home loan application. Each lender applies its own credit score threshold, typically ranging from 500 to 650 depending on whether you are applying for an owner-occupied variable rate product or an investment loan with a high loan-to-value ratio.

A score below the lender's threshold triggers either an automatic decline or a referral to manual underwriting, where additional conditions are applied. These conditions can include a higher deposit requirement, proof of two years' continuous employment rather than one, or removal of offset account features from the loan structure.

The Link Between Credit History and Interest Rate Discounts

Major banks reserve their lowest advertised rates for borrowers with a credit score above 700, a loan-to-value ratio below 80%, and no adverse credit events in the past five years. A single default, even if paid in full, can reduce your eligibility for rate discounts by 0.30% to 0.60%.

Consider a buyer in Parramatta purchasing a unit at the suburb's median price of approximately $620,000. With a 15% deposit of $93,000 and a credit score of 750, they may access a variable rate of 6.12% with a full offset account and no ongoing fees. The same buyer with a credit score of 620 and a paid telecommunications default from two years prior may be offered 6.52% with no offset account and a $395 annual package fee. Over the first five years, the difference in total repayments and fees is approximately $14,700.

What Appears on Your Credit File and for How Long

Your credit file records every credit enquiry made by a lender, every open credit account, and every repayment default or court judgment. Enquiries remain visible for five years, defaults remain for five years from the date they are listed, and repayment history information remains for two years.

Payment defaults below $150 cannot be listed, and utility providers, telcos, and health insurers can only list defaults after providing you with written notice and allowing at least 28 days for payment. Once listed, a default remains visible even if you pay it the following day. Paying a default changes its status to 'paid' but does not remove it from your file.

Bankruptcy remains listed for five years from the date you become bankrupt, or two years from the date your bankruptcy ends, whichever is later. Part IX and Part X debt agreements remain listed for five years from the date the agreement is made.

How Multiple Home Loan Enquiries Affect Your Application

Every time a lender retrieves your credit file, an enquiry is recorded and visible to other lenders. Three or more enquiries within 90 days signals to lenders that you have been declined elsewhere or are shopping aggressively for credit, both of which increase perceived risk.

In our experience, borrowers who apply directly to multiple banks within a short period often reduce their approval chances without realising it. A broker submits a single application to a lender matched to your credit profile, deposit size, and income structure, avoiding the accumulation of unnecessary enquiries. If that lender declines or offers unfavourable terms, the broker identifies an alternative without further damage to your file.

Repairing Credit Issues Before You Apply

If your credit file contains errors, you can request a correction directly from the credit reporting body. Common errors include enquiries made without your permission, defaults listed by a provider you never held an account with, and accounts marked as open when they were closed years earlier.

If the information is accurate but negative, your options are more limited. Defaults cannot be removed early, even if paid. The most effective approach is to avoid new credit enquiries, pay all current accounts on time, and wait for older listings to age beyond the two-year or five-year threshold where they carry less weight in lending decisions.

For borrowers with recent defaults or missed payments, some non-major lenders assess applications using a 12-month repayment history rather than a credit score. These lenders require evidence that you have paid every bill and loan repayment on time for the past year, even if older issues remain on your file. The rates are higher, typically 7.20% to 7.80%, but they provide a pathway to refinancing with a major bank once your repayment history improves.

The Deposit Penalty for Lower Credit Scores

Lenders apply higher risk weightings to borrowers with credit scores below 650, which increases the capital they must hold against your loan under APRA's prudential standards. To offset that cost, lenders either increase the interest rate or require a larger deposit.

A borrower in Baulkham Hills with a credit score of 580 and a 10% deposit on a house priced at the suburb's median of approximately $1,995,000 will be declined by most major banks, even if their income comfortably services the loan. The same borrower with a 25% deposit may be approved at a higher rate, as the lower loan-to-value ratio reduces the lender's capital requirement and exposure to loss.

For first home buyers using the Australian Government 5% Deposit Scheme, credit score thresholds are strictly enforced. Most participating lenders require a minimum score of 650, and some require 700 or higher, as the scheme does not eliminate the lender's risk, it only removes the need for lenders mortgage insurance.

When a Co-Borrower's Credit Score Affects Your Application

Lenders assess the credit file of every applicant on the loan. If you apply jointly with a partner, sibling, or parent, the lowest credit score among all applicants determines the rate and deposit requirement.

A buyer with a score of 780 applying jointly with a partner who has a score of 540 and an unpaid default will be assessed at the lower score. The solution is not always to remove the co-borrower, as that also removes their income from the serviceability calculation. Instead, the co-borrower should address the default, wait for their repayment history to improve, or contribute equity without being named on the loan title or mortgage.

How Investment Loans and Higher LVRs Tighten Credit Requirements

Lenders apply stricter credit score thresholds to investment loans than to owner-occupied loans, and stricter thresholds again when the loan-to-value ratio exceeds 80%. A score of 650 may be acceptable for an owner-occupied loan at 75% LVR, but the same score may trigger a decline for an investment loan at 85% LVR.

This reflects APRA's risk-weighting framework, which assigns higher capital requirements to investment lending and high-LVR lending. Lenders pass that cost to borrowers through higher rates, larger deposit requirements, or narrower eligibility criteria. If your credit score sits between 620 and 680, you will find significantly more lender options by increasing your deposit from 10% to 20%.

Call one of our team or book an appointment at a time that works for you. We'll retrieve your credit file with your permission, identify any issues that may affect your application, and match you to lenders whose credit policies align with your profile before any formal enquiry is recorded.

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