Back to Inspire Home

How much interest you're actually paying over the life of your loan

Interest is a major cost to factor into your home loan decisions. When repaying your home loan, not only do you have to repay the principal (loan amount) each month, but you also have to pay the interest charged on top of your balance.

Most borrowers have a loan term between 20 and 30 years. Even though home loan interest rates tend to be low, in comparison to credit cards and car loans, the total interest does add up over this time.

For example, on a 25 year $300,000 mortgage with a 3% interest rate, you’ll pay about $126,790 in interest. That is a lot to spend on interest alone!

This is why it’s important to jump on opportunities to save money and reduce your interest rate. In this article we’ll explain how interest is calculated, tell you how to pay less home loan interest, and show you how much you could save with a lower rate.

How is interest calculated on a home loan?

Unfortunately, banks aren’t in the business of lending money for free. They have a number of costs to cover and also want to make a profit, so they charge interest on top of the loans they provide. Think of interest as a percentage-based borrowing fee because you are using someone else’s money.

Interest is calculated from the daily closing balance of your loan and is only accrued from your loan amount at the time. This is why making principal and interest repayments, and making extra repayments (if possible) can be very helpful. The lower your loan balance, the less interest you will be charged.

Getting a good interest rate is critical for borrowers wishing to minimise their interest payments. Even a marginal 0.5% interest rate reduction can make a significant difference in the long term.

For example, if you get a 30 year $400,000 home loan with a 3% interest rate, you’d pay an approximate total of $207,109 in interest. With a 2.5% interest rate, you’d pay about $168,974 in interest over the life of the same loan.

Of course, it’s highly unlikely that you’ll have the same interest rate over a 30 year time period. Most fixed rate home loans only guarantee an interest rate for up to 5 years and variable interest rates are popular among borrowers for their flexibility.

How much interest do you pay on a $1,000,000 home loan?

Interest rateLoan termTotal interest
2.5%30 years$422,360
3.5%30 years$616,400
4.5%30 years$824,120

How much interest do you pay on a $800,000 home loan?

Interest rateLoan termTotal interest
2.5%30 years$337,960
3.5%30 years$493,120
4.5%30 years$659,080

How much interest do you pay on a $550,000 home loan?

Interest rateLoan termTotal interest
2.5%30 years$232,280
3.5%30 years$339,200
4.5%30 years$453,320

How to pay less home loan interest

Your home loan is already a major expense, so don’t pay more in interest than you have to. Here are 5 ways to pay less interest on your mortgage:

1. Ask your lender for a lower interest rate

Refinancing isn’t the only way to seek out a lower interest rate. Usually, you can start by simply asking your lender to lower your rate. Research and find out what rates your lender is offering to new customers. If it’s lower than what you’re paying, it’s worth asking for a better deal.

Your chances of getting a reduced rate will depend on your risk to the lender. If you have a history of making on-time repayments and have a good credit score, you’ll likely be perceived as lower risk.

Read more about negotiating a lower home loan rate here.

Is your interest rate this low?

Make sure you always have best home loan deal.

Compare rates today

2. Refinance

Most borrowers should look into refinancing every two years or so. Not only does refinancing ensure that you have a home loan that suits your up-to-date needs and financial situation, but it can also give you the opportunity to secure a lower interest rate.

Don’t be afraid to consider a range of lenders as there may be more competitive home loan deals out there. Online platforms like Lendi make it easy to search and compare home loans from dozens of lenders.

3. Get an offset account

An offset account can be a great way for savvy savers to reduce their home loan interest. It is a kind of savings account linked to your home loan balance designed to help you pay less interest. Any funds in this account offset how much interest you are charged. For example, if you have a $200,000 home loan with $20,000 in an offset account, you’ll only be charged interest on $180,000.

Compare offset accounts with redraw facilities here to see what is best for you.

How much can you save with an offset account?

Find out how much you could save each month.

Calculate savings

4. Make extra repayments

Making extra repayments on top of your monthly repayments reduces your home loan balance even further. It can also help you pay off your loan faster. The shorter your loan term and the lower your mortgage, the less interest you’ll be charged.

If you have a fixed rate home loan, be sure to check your loan terms or contact your lender to ensure that you can make extra repayments without penalty. Many fixed rate loans attract break fees when you make additional repayments or repay your loan early.

5. Avoid interest only home loans

If paying less home loan interest is a priority for you, then you’ll probably want to avoid interest only repayments. Instead, opt for a traditional principal and interest repayment system where you pay down the principal (loan balance), in addition to the interest charged on your loan.

An interest only home loan means that you aren’t paying off the principal (loan amount) for a set period of time. When the interest only period ends, you’ll be faced with larger monthly repayments including both interest and principal.

How much can you save by reducing your interest rate?

Getting a lower interest rate is one of the best ways to reduce your monthly repayments and spend less on your home loan overall. See the table below for an indication of how much interest you’ll pay on a home loan with different interest rates:

Amount borrowedInterest rateLoan termMonthly repaymentTotal interest paid over life of loan

What might seem like an insignificant saving in the short term can amount to big savings long term. Read our article on determining whether it is worth refinancing for more information.

Calculate your monthly home loan repayments

Find out if you can save with a lower interest rate.

Calculate now

If you want to refinance, lower your interest rate or just find out about your home loan options, speak to a Lendi Home Loan Specialist for free expert advice.

What could your home loan repayments look like?

Calculate your loan repayments


Got a home loan question? Just ask!

We're here to help. Get free expert advice at a time that suits you. Choose a time to chat with a Home Loan Specialist here

The information in this post is general in nature and should not be considered personal or financial advice. You should always seek professional advice or assistance before making any financial decisions.

Tags: home loan, interest rate, first home, first home buyer, new purchase, deposit, variable interest, offset account, refinance, extra repayments, fixed interest, interest only

Check today's low rates

Tell us what you are looking for and see if you can save.

Search rates

Check today's low rates

Tell us what you are looking for and see if you can save.

Search rates
Home loan repayment saver tool

Home loan repayment saver tool

Enter a few details about your home loan and see how much you could save on your repayments

Important legal stuff

Lendi is the trading name of Lendi Pty Ltd (ACN 611 161 856), a related body corporate of Auscred Services Pty Ltd (ACN 164 638 171, Australian Credit Licence 442372). We will never sell your email address to any third party or send you nasty spam, promise.
# Quoted rate applies only to PAYG loans with LVR of 80% or less with security in non-remote areas. All applications are subject to assessment and lender approval.
Lendi is a privately owned and operated Australian business. Our mission is to change the way Australians get home loans by providing a faster, smarter and more secure home loan experience designed around the customer’s convenience and needs. Although Lendi compares over 1600 products (2,500+ products including feature and pricing variations) from more than 35 lenders, we don't cover the whole market or compare all features and there may be other features or options available to you. While Lendi is 35% owned by founders and employees, we have also been supported by some great minority shareholders including Bailador, Macquarie Bank Ltd and a number of Australian sophisticated investors.
*WARNING: This comparison rate is true only for the example given and may not include all fees and charges. Different terms, fees or other loan amounts might result in a different comparison rate. The comparison rates are based on a loan amount of $150,000 over a loan term of 25 years. Fees and charges apply. All applications are subject to assessment and lender approval. Quoted rate applies only to PAYG loans with LVR of 80% or less with security in non-remote areas. All applications are subject to assessment and lender approval.
IMPORTANT INFORMATION: Loan terms of between 1 Year and 40 Years are available subject to lender and credit criteria. Maximum comparison rate will not exceed 14.99% (see comparison rate warning above). Any calculations or estimated savings do not constitute an offer of credit or a credit quote and are only an estimate of what you may be able to achieve based on the accuracy of the information provided. It doesn't take into account any product features or any applicable fees. Our lending criteria and the basis upon which we assess what you can afford may change at any time without notice. Savings shown are based on user inputted data and a loan term of 30 years. All applications for credit are subject to lender credit approval criteria.
Made with love at Circular Quay in Sydney, Australia. © 2021. All rights reserved.