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How Much Mortgage Can I Afford? Unlock Your Dream Home

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Purchasing a home is a significant milestone, and one of the most common questions potential homebuyers have is, “How much mortgage can I afford?” Understanding your financial readiness is crucial for making informed decisions and securing your dream home. In this blog post, we’ll explore how mortgages work, the key factors influencing affordability, and practical steps to assess your financial situation.

How Does a Mortgage Work?

A mortgage is a loan provided by a bank or financial institution to help you buy a home. The home itself is collateral, meaning the lender may take it if you fail to repay the loan. Mortgages typically have two main components: principal and interest.

  • Principal: The sum of money that you borrow to buy the house.
  • Interest: The cost of borrowing the money, typically represented as an annual percentage rate (APR).

Mortgages come in various forms, including fixed-rate and variable-rate loans. A fixed-rate mortgage has a consistent interest rate throughout the loan term, while a variable-rate mortgage may fluctuate based on market conditions. Understanding these options helps you choose a mortgage that best suits your financial situation.

What Mortgage Can I Afford?

Determining how much mortgage you can afford involves evaluating your income, expenses, and overall financial health. Here are the key factors to consider:

  1. Income: Begin by considering your total monthly earnings before deductions. Lenders typically prefer that your mortgage repayments (including principal, interest, taxes, and insurance) not exceed 28-31% of your gross monthly income.
  2. Expenses: Calculate your monthly expenses, including utilities, groceries, transport, and other recurring costs. This will help you understand how much of your income is available for mortgage repayment.
  3. Deposit: The amount you can put down upfront affects the loan amount and monthly repayments. A larger deposit reduces the mortgage principal and can lower monthly repayments.
  4. Credit Score: Lenders offer interest rates based on your credit score. A higher credit score generally translates to a lower interest rate, reducing the overall cost of the mortgage.
  5. Debt-to-Income Ratio (DTI): This ratio compares your monthly debt repayments to your gross monthly income. Lenders prefer a DTI below 36%, with no more than 28% of that going towards your mortgage.

What Details Should I Prepare For Application?

When applying for a mortgage, being well-prepared can streamline the process and increase your chances of approval. Here’s a list of essential documents and information to gather:

  • Proof of Income: Provide recent pay slips, tax returns, and payment summaries to verify your income and to ensure that it meets the lender’s requirements.
  • Credit Report: A current credit report to ensure accuracy and address any discrepancies that could affect your application.
  • Assets and Liabilities: Statements for bank accounts, superannuation funds, and other assets, as well as a detailed list of existing debts.
  • Employment Verification: Provide your employer’s contact details to validate your employment status, income, and length of employment.
  • Identification: Government-issued ID such as a driver’s licence or passport to verify your identity.

Having these documents ready will help make the mortgage application process smoother and more efficient.

How Does My Debt-to-Income Ratio Impact Affordability?

The debt-to-income ratio (DTI) is critical in determining how much mortgage you can afford. To find it, divide your total monthly debt payments by your monthly gross income. A lower DTI indicates better financial health and a greater ability to manage additional debt, making you a more attractive borrower.

  • Front-End Ratio: This is the amount of your income that goes towards housing expenses, including mortgage repayments, council rates, and insurance. Most lenders require a front-end ratio of no more than 28 to 31%.
  • Back-End Ratio: This includes all monthly debt obligations (housing expenses, student loans, car loans, credit card repayments) and is generally expected to be below 36%.

Home Affordability Calculator

A better understanding of how much mortgage you’ll be able to afford is provided by using a home affordability calculator. These calculators consider your income, expenses, deposit, and interest rates to estimate an affordable mortgage amount.

To use a home affordability calculator:

  • Input Your Income: Enter your gross monthly income.
  • List Your Expenses: Include all monthly expenses and existing debt repayments.
  • Specify Deposit: Indicate the amount you can put down upfront.
  • Adjust Interest Rates: Enter the interest rate you expect to receive.
  • Review Results: The calculator will estimate the mortgage amount you can afford based on the inputs.

Understanding the amount of mortgage you can afford is a crucial step in the home-buying process. By evaluating your income, expenses, credit score, and debt-to-income ratio, you can make informed decisions and avoid financial strain. Use tools like home affordability calculators and consult with a refinancing mortgage broker to get personalised advice.


Q: What credit score do I need for a mortgage?

A: It is generally considered reasonable to have a credit score of 700 or more, which can lead to a favourable interest rate. However, some lenders offer options for scores as low as 620.

Q: How much should I save for a deposit?

A: While a 20% deposit is ideal to avoid lender’s mortgage insurance (LMI), many lenders offer loans with as little as 5% down.

Q: Can I get a mortgage if I have existing debt?

A: Yes, but your debt-to-income ratio will be a significant factor. Keeping your DTI below 36% improves your chances of approval.

Q: How do interest rates impact how much house I can afford?

A: Lower interest rates mean lower monthly payments and less total interest paid overall. This makes it easier to qualify for a bigger loan and buy a more expensive home.

Q: What are closing costs, and how much should I budget for them?

A: Closing costs include fees for appraisals, legal services, and other expenses, typically ranging from 2% to 5% of the loan amount. It is essential to budget for these costs so as not to be surprised.

By following these guidelines and leveraging available resources, you can confidently navigate homebuying and unlock your dream home. For personalised assistance, consider consulting with a professional mortgage broker. Additionally, learn more about borrowing a mortgage and ways to refinance a mortgage with bad credit.

Eager to move closer to owning your ideal home? Our experienced mortgage brokers are here to help you navigate the home-buying process and find the best mortgage options tailored to your requirements. Contact us today for a personalised consultation and get started on securing your future.