Key takeaways
- Even a 0.25% difference in mortgage rate can cost or save you over $20,000 over the life of a $500,000 loan — comparing your offer against national averages is one of the fastest ways to spot an unfavorable deal.
- Rates vary significantly between lenders, so checking multiple providers before committing gives you leverage to negotiate or choose a better offer.
- Your rate is only part of the picture — factor in application fees, loan-to-value ratio requirements, and payment flexibility when comparing total mortgage costs.
Even a fraction of a percentage difference in APR can add up to tens of thousands over the life of a 30-year loan. Compare average market rates to make sure you’re getting the best deal.
Why do I need to know the average mortgage interest rate?
When you borrow money to finance the purchase of a home, banks don’t just hand the funds out for free. Not only will you have to pay back the money you borrow, but you’ll also have to repay the interest that accumulates on that principal amount.
Your lender sets the rate at which interest accumulates on the money you borrow. There can be substantial interest rate differences from one lender to the next, and they have a huge impact on the overall cost of your mortgage. Comparing the offered interest rate to the national average can help you quickly weed out the unfavorable options.
How much difference does a higher or lower interest rate make?
Even a slight variation in APR can add up to tens of thousands of dollars over the life of a mortgage. For example, let’s consider a $500,000 home loan with principal and interest payments and a loan term of 25 years. The table below shows the overall cost of this loan with an interest rate of 3.75% APR and 4.00% APR.
| Mortgage A | Mortgage B | |
|---|---|---|
| Interest rate | 4.00% APR | 3.75% APR |
| Loan amount | $500,000 | $500,000 |
| Monthly payment | $2,639.18 | $2,570.66 |
| Total cost of loan | $791,755.26 | $771,196.80 |
| Total interest paid | $291,755.26 | $271,196.80 |
The 0.25% decrease in interest rate on Mortgage B adds up to over $20,000 saved over the life of the loan.
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What other factors affect mortgage affordability?
While interest rates are undoubtedly important, they’re not the only factor that determines whether a home loan meets your needs. Other issues to consider include:
- Fees. These include application fees, loan establishment fees, legal fees, ongoing fees, early repayment fees and more.
- Loan to valuation ratio (LVR). This refers to the amount of money you are allowed to borrow relative to the value of the property you want to buy. It has a direct impact on the down payment size you’ll need to save up.
- Payment flexibility. As well as choosing a payment schedule to suit your budget, some loans also allow you to make additional payments at any time so you can pay your loan off quicker.
Bottom line
Even a small difference in interest rate can have a big impact on how much your mortgage costs. Compare your options to find a lender with an APR, and other features, you’re happy with.
Frequently asked questions
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