What is a mortgage calculator?

What is a mortgage calculator?

A mortgage calculator is an online tool that shows you how much you’d have to repay based on different home loan scenarios.

A typical mortgage calculator will allow you to play around with a range of variables, including:

  • Interest rate – e.g. 4 per cent
  • Loan term – e.g. 30 years
  • Loan size – e.g. $350,000
  • Repayment frequency – monthly, fortnightly or weekly
  • Repayment type – principal and interest or interest-only

Imagine you took out a home loan with these characteristics:

Here’s how your repayments would look under different interest rate scenarios:

Interest rate Monthly repayments Total repayments
4.00% $1,671 $601,542
5.00% $1,879 $676,393
6.00% $2,098 $755,432
7.00% $2,329 $838,280
8.00% $2,568 $924,539

You might be able to afford to repay a $350,000 loan at 4.00 per cent, but would you be able to repay it if interest rates rose to, say, 8.00 per cent?

A mortgage calculator can help you answer that question, and in turn help you decide whether or not you can afford a loan.

Of course, interest rates are just one variable. Loan term is another. If you decided to repay your hypothetical home loan over 25 years rather than 30, you’d save tens of thousands of dollars over the life of the loan, according to the calculator:

Interest rate Monthly repayments Total repayments Savings
4.00% $1,847 $554,228 $47,314
5.00% $2,046 $613,818 $62,575
6.00% $2,255 $676,515 $78,917
7.00% $2,474 $742,117 $96,163
8.00% $2,701 $810,405 $114,134

If you’re wondering why you save money paying off the loan sooner, it’s because you reduce the principal faster, which in turn means you get charged less interest.

Imagine you were thinking about buying a more expensive property, which would mean borrowing $400,000 rather than $350,000. Again, you could use a mortgage calculator to work out whether that was feasible.

Here’s how your repayments would look based on different interest rates and loan terms:

30-year loan

Interest rate Monthly repayments Increase on $350k Total repayments Increase on $350k
4.00% $1,910 $239 $687,478 $85,936
5.00% $2,147 $268 $773,021 $96,628
6.00% $2,398 $300 $863,352 $107,920
7.00% $2,661 $332 $958,036 $119,756
8.00% $2,935 $367 $1,056,619 $132,080

25-year loan

Interest rate Monthly repayments Increase on $350k Total repayments Increase on $350k
4.00% $2,111 $264 $633,404 $79,176
5.00% $2,338 $292 $701,508 $87,690
6.00% $2,577 $322 $773,160 $96,645
7.00% $2,827 $353 $848,133 $106,016
8.00% $3,087 $386 $926,178 $115,773

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Learn more about home loans

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.

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.

How does a mortgage calculator work?

A mortgage calculator is an extremely helpful tool when planning to take out a home loan and working out the costs. Although each mortgage calculator you come across may be slightly different, most will help you estimate how much your repayments will be. The calculator will often also show you the difference in repayments if you repay weekly, monthly or fortnightly. 

To calculate these figures, you’ll be asked to enter a few details. These include the amount you plan to borrow, whether you’re an owner-occupier or an investor, the proposed interest rate and the home loan term. It will also often show you the total interest you’ll be charged and the total amount you’ll repay over the life of the loan.  

Understanding how the mortgage calculator works, helps you to use it to see how different loan amounts, interest rates and terms affect your repayments. This can then help you choose a home loan that you can repay comfortably and save on interest costs. The mortgage calculator lets you compare the benefits and costs of home loans from different lenders to help you make a more informed choice. Use a mortgage calculator to help identify which home loan is most suitable for your requirements and financial situation.

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 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.

When does Commonwealth Bank charge an early exit fee?

When you take out a fixed interest home loan with the Commonwealth Bank, you’re able to lock the interest for a particular period. If the rates change during this period, your repayments remain unchanged. If you break the loan during the fixed interest period, you’ll have to pay the Commonwealth Bank home loan early exit fee and an administrative fee.

The Early Repayment Adjustment (ERA) and Administrative fees are applicable in the following instances:

  • If you switch your loan from fixed interest to variable rate
  • When you apply for a top-up home loan
  • If you repay over and above the annual threshold limit, which is $10,000 per year during the fixed interest period
  • When you prepay the entire outstanding loan balance before the end of the fixed interest duration.

The fee calculation depends on the interest rates, the amount you’ve repaid and the loan size. You can contact the lender to understand more about what you may have to pay. 

How to use the ME Bank reverse mortgage calculator?

You can access the equity in your home to help you fund your needs during your senior years. A ME Bank reverse mortgage allows you to tap into the equity you’ve built up in your home while you continue living in your house. You can also use the funds to pay for your move to a retirement home and repay the loan when you sell the property.

Generally, if you’re 60 years old, you can borrow up to 15 per cent of the property value. If you are older than 75 years, the amount you can access increases to up to 30 per cent. You can use a reverse mortgage calculator to know how much you can borrow.

To take out a ME Bank reverse mortgage, you’ll need to provide information like your age, type of property – house or an apartment, postcode, and the estimated market value of the property. The loan to value ratio (LVR) is calculated based on your age and the property’s value.

What are the features of home loans for expats from Westpac?

If you’re an Australian citizen living and working abroad, you can borrow to buy a property in Australia. With a Westpac non-resident home loan, you can borrow up to 80 per cent of the property value to purchase a property whilst living overseas. The minimum loan amount for these loans is $25,000, with a maximum loan term of 30 years.

The interest rates and other fees for Westpac non-resident home loans are the same as regular home loans offered to borrowers living in Australia. You’ll have to submit proof of income, six-month bank statements, an employment letter, and your last two payslips. You may also be required to submit a copy of your passport and visa that shows you’re allowed to live and work abroad.

How is interest charged on a reverse mortgage from IMB Bank?

An IMB Bank reverse mortgage allows you to borrow against your home equity. You can draw down the loan amount as a lump sum, regular income stream, line of credit or a combination. The interest can either be fixed or variable. To understand the current rates, you can check the lender’s website.

No repayments are required as long as you live in the home. If you sell it or move to a senior living facility, the loan must be repaid in full. In some cases, this can also happen after you have died. Generally, the interest rates for reverse mortgages are higher than regular mortgage loans.

The interest is added to the loan amount and it is compounded. It means you’ll pay interest on the interest you accrue. Therefore, the longer you have the loan, the higher is the interest and the amount you’ll have to repay.

Cash or mortgage – which is more suitable to buy an investment property?

Deciding whether to buy an investment property with cash or a mortgage is a matter or personal choice and will often depend on your financial situation. Using cash may seem logical if you have the money in reserve and it can allow you to later use the equity in your home. However, there may be other factors to think about, such as whether there are other debts to pay down and whether it will tie up all of your spare cash. Again, it’s a personal choice and may be worth seeking personal advice.

A mortgage is a popular option for people who don’t have enough cash in the bank to pay for an investment property. Sometimes when you take out a mortgage you can offset your loan interest against the rental income you may earn. The rental income can also help to pay down the loan.

What do people do with a Macquarie Bank reverse?

There are a number of ways people use a Macquarie Bank reverse mortgage. Below are some reasons borrowers tend to release their home’s equity via a reverse mortgage:

  • To top up superannuation or pension income to pay for monthly bills;
  • To consolidate and repay high-interest debt like credit cards or personal loans;
  • To fund renovations, repairs or upgrades to their home
  • To help your children or grandkids through financial difficulties. 

While there are no limitations on how you can use a Macquarie reverse mortgage loan, a reverse mortgage is not right for all borrowers. Reverse mortgages compound the interest, which means you end up paying interest on your interest. They can also affect your entitlement to things like the pension It’s important to think carefully, read up and speak with your family before you apply for a reverse mortgage.

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.

How long should I have my mortgage for?

The standard length of a mortgage is between 25-30 years however they can be as long as 40 years and as few as one. There is a benefit to having a shorter mortgage as the faster you pay off the amount you owe, the less you’ll pay your bank in interest.

Of course, shorter mortgages will require higher monthly payments so plug the numbers into a mortgage calculator to find out how many years you can potentially shave off your budget.

For example monthly repayments on a $500,000 over 25 years with an interest rate of 5% are $2923. On the same loan with the same interest rate over 30 years repayments would be $2684 a month. At first blush, the 30 year mortgage sounds great with significantly lower monthly repayments but remember, stretching your loan out by an extra five years will see you hand over $89,396 in interest repayments to your bank.

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.