Calculating your home loan repayments

Calculating your home loan repayments

Choosing the right home loan can seem almost as challenging as finding a suitable home. The good news is that with RateCity’s repayment calculator for home loans, help is at your fingertips – literally!

With the repayment calculator for home loans you simply punch in the amount you wish to borrow, the interest rate and the loan term, and the calculator will generate a wide selection of home loans for review.

If you need to cut the list, the calculator lets you tinker with the payment frequency (weekly, fortnightly, or monthly) or select a ‘fixed’ or ‘variable’ rate home loan. With the repayment calculator for home loans there’s also the option to choose ‘principal and interest’ or ‘interest only’ repayments.

Variable Mortgage Loan

With a variable mortgage loan the amount of interest paid is dictated mostly by the lender. However the lender’s rates also often reflect changes to the official cash rate, which is determined monthly by the Reserve Bank of Australia.

The major appeal of a variable mortgage loan is its flexibility and the ability to make additional repayments whenever you want.

Fixed Mortgage Loan

If rising interest rates keep you awake at night, then a fixed mortgage loan may be suitable. These home loans let you fix the interest rate for one to five years. Consequently, fixed loans provide financial security if rates go up, but are problematic if they dive.

Principal and Interest (P&I) repayments

With P&I repayments, the regular home loan payments are higher than with an interest-only loan. Choosing a P&I strategy is worth considering if you’re planning on owning your home outright.

Interest-only repayments

Interest-only payments won’t let you make a dent in the principal, but you’ll enjoy lower repayments. Normally, interest-only repayments are suited to investors chasing growth and who can claim the interest component of their loan repayments as a tax deduction.  

Finally, in a first for home loan customers, RateCity’s repayment calculator for home loans lets you choose a home loan from a lender and then it will give you an estimate of the interest and fees you’ll pay. This is a great feature to help you compare home loans.

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Learn more about home loans

How can I calculate interest on my home loan?

You can calculate the total interest you will pay over the life of your loan by using a mortgage calculator. The calculator will estimate your repayments based on the amount you want to borrow, the interest rate, the length of your loan, whether you are an owner-occupier or an investor and whether you plan to pay ‘principal and interest’ or ‘interest-only’.

If you are buying a new home, the calculator will also help you work out how much you’ll need to pay in stamp duty and other related costs.

What happens to my home loan when interest rates rise?

If you are on a variable rate home loan, every so often your rate will be subject to increases and decreases. Rate changes are determined by your lender, not the Reserve Bank of Australia, however often when the RBA changes the cash rate, a number of banks will follow suit, at least to some extent. You can use RateCity cash rate to check how the latest interest rate change affected your mortgage interest rate.

When your rate rises, you will be required to pay your bank more each month in mortgage repayments. Similarly, if your interest rate is cut, then your monthly repayments will decrease. Your lender will notify you of what your new repayments will be, although you can do the calculations yourself, and compare other home loan rates using our mortgage calculator.

There is no way of conclusively predicting when interest rates will go up or down on home loans so if you prefer a more stable approach consider opting for a fixed rate loan.

What is an interest-only loan? How do I work out interest-only loan repayments?

An ‘interest-only’ loan is a loan where the borrower is only required to pay back the interest on the loan. Typically, banks will only let lenders do this for a fixed period of time – often five years – however some lenders will be happy to extend this.

Interest-only loans are popular with investors who aren’t keen on putting a lot of capital into their investment property. It is also a handy feature for people who need to reduce their mortgage repayments for a short period of time while they are travelling overseas, or taking time off to look after a new family member, for example.

While moving on to interest-only will make your monthly repayments cheaper, ultimately, you will end up paying your bank thousands of dollars extra in interest to make up for the time where you weren’t paying off the principal.

What is a fixed home loan?

A fixed rate home loan is a loan where the interest rate is set for a certain amount of time, usually between one and 15 years. The advantage of a fixed rate is that you know exactly how much your repayments will be for the duration of the fixed term. There are some disadvantages to fixing that you need to be aware of. Some products won’t let you make extra repayments, or offer tools such as an offset account to help you reduce your interest, while others will charge a significant break fee if you decide to terminate the loan before the fixed period finishes.

What is 'principal and interest'?

‘Principal and interest’ loans are the most common type of home loans on the market. The principal part of the loan is the initial sum lent to the customer and the interest is the money paid on top of this, at the agreed interest rate, until the end of the loan.

By reducing the principal amount, the total of interest charged will also become smaller until eventually the debt is paid off in full.

How do I calculate monthly mortgage repayments?

Work out your mortgage repayments using a home loan calculator that takes into account your deposit size, property value and interest rate. This is divided by the loan term you choose (for example, there are 360 months in a 30-year mortgage) to determine the monthly repayments over this time frame.

Over the course of your loan, your monthly repayment amount will be affected by changes to your interest rate, plus any circumstances where you opt to pay interest-only for a period of time, instead of principal and interest.

What are extra repayments?

Additional payments to your home loan above the minimum monthly instalments, which can help to reduce the loan’s term and remaining payable interest.

What is the difference between fixed, variable and split rates?

Fixed rate

A fixed rate home loan is a loan where the interest rate is set for a certain amount of time, usually between one and 15 years. The advantage of a fixed rate is that you know exactly how much your repayments will be for the duration of the fixed term. There are some disadvantages to fixing that you need to be aware of. Some products won’t let you make extra repayments, or offer tools such as an offset account to help you reduce your interest, while others will charge a significant break fee if you decide to terminate the loan before the fixed period finishes.

Variable rate

A variable rate home loan is one where the interest rate can and will change over the course of your loan. The rate is determined by your lender, not the Reserve Bank of Australia, so while the cash rate might go down, your bank may decide not to follow suit, although they do broadly follow market conditions. One of the upsides of variable rates is that they are typically more flexible than their fixed rate counterparts which means that a lot of these products will let you make extra repayments and offer features such as offset accounts.

Split rates home loans

A split loan lets you fix a portion of your loan, and leave the remainder on a variable rate so you get a bet each way on fixed and variable rates. A split loan is a good option for someone who wants the peace of mind that regular repayments can provide but still wants to retain some of the additional features variable loans typically provide such as an offset account. Of course, with most things in life, split loans are still a trade-off. If the variable rate goes down, for example, the lower interest rates will only apply to the section that you didn’t fix.

What is a variable home loan?

A variable rate home loan is one where the interest rate can and will change over the course of your loan. The rate is determined by your lender, not the Reserve Bank of Australia, so while the cash rate might go down, your bank may decide not to follow suit, although they do broadly follow market conditions. One of the upsides of variable rates is that they are typically more flexible than their fixed rate counterparts which means that a lot of these products will let you make extra repayments and offer features such as offset accounts.

How can I pay off my home loan faster?

The quickest way to pay off your home loan is to make regular extra contributions in addition to your monthly repayments to pay down the principal as fast as possible. This in turn reduces the amount of interest paid overall and shortens the length of the loan.

Another option may be to increase the frequency of your payments to fortnightly or weekly, rather than monthly, which may then reduce the amount of interest you are charged, depending on how your lender calculates repayments.

Who has the best home loan?

Determining who has the ‘best’ home loan really does depend on your own personal circumstances and requirements. It may be tempting to judge a loan merely on the interest rate but there can be added value in the extras on offer, such as offset and redraw facilities, that aren’t available with all low rate loans.

To determine which loan is the best for you, think about whether you would prefer the consistency of a fixed loan or the flexibility and potential benefits of a variable loan. Then determine which features will be necessary throughout the life of your loan. Thirdly, consider how much you are willing to pay in fees for the loan you want. Once you find the perfect combination of these three elements you are on your way to determining the best loan for you. 

What are the responsibilities of a mortgage broker?

Mortgage brokers act as the go-between for borrowers looking for a home loan and the lenders offering the loan. They offer personalised advice to help borrowers choose the right home loan for their needs.

In Australia, mortgage brokers are required by law to carry an Australian Credit License (ACL) if they offer credit assistance services. Which is the legal term for guidance regarding the different kinds of credit offered by lenders, including home loan mortgages. They may not need this license if they are working for an aggregator, for instance, as a franchisee. In both these situations, they need to comply with the regulations laid down by the Australian Securities and Investments Commission (ASIC).

These regulations, which are stipulated by Australian legislation, require mortgage brokers to comply with what are called “responsible lending” and “best interest” obligations. Responsible lending obligations mean brokers have to suggest “suitable” home loans. This means loans that you can easily qualify for,  actually meet your needs, and don’t prove unnecessarily challenging for you.

Starting 1 January 2021, mortgage brokers must comply with best interest obligations in addition to responsible lending obligations. These require mortgage brokers to act in the best interest of their customers and also requires them to prioritise their customers’ interests over their own. For instance, a mortgage broker may not recommend a lender who gives them a commission if that lender’s home loan offer does not benefit that particular customer.

Remaining loan term

The length of time it will take to pay off your current home loan, based on the currently-entered mortgage balance, monthly repayment and interest rate.

How much are repayments on a $250K mortgage?

The exact repayment amount for a $250,000 mortgage will be determined by several factors including your deposit size, interest rate and the type of loan. It is best to use a mortgage calculator to determine your actual repayment size.

For example, the monthly repayments on a $250,000 loan with a 5 per cent interest rate over 30 years will be $1342. For a loan of $300,000 on the same rate and loan term, the monthly repayments will be $1610 and for a $500,000 loan, the monthly repayments will be $2684.