When you apply for a home loan your lender must take into account your average monthly living expenses to work out how much you can borrow. This is a legal requirement under the National Consumer Credit Protection Act.

Banks will run a very close eye over your bank statements to see what your actual living expenses are - and they might do this in a couple of different ways.

Typically, lenders will use the Household Expenditure Method (HEM), although there are other ways too.

What is the Household Expenditure Method?

The HEM is the primary way that lenders will look at living expenses. It will assume a figure of how much someone spends based on more than 600 items in the ABS Household Expenditure Survey (HES).

For example, the latest HES data from 2016 shows that the average household with a couple and dependent children had an average weekly expenditure of $1,992. Banks would assume this spending when working out your borrowing power.

However, in the banking royal commission in 2018 banks were criticised for over-reliance on the HEM and not taking into account the efforts borrowers will go to in saving money when they're repaying their home loan.

How is the HEM calculated?

The HEM is calculated as the average spend on absolute basics such as food, utilities, transport, communications and kids' clothing. It also takes into account 25% of discretionary spending, on things like alcohol, eating out and childcare.

Non-basic expenses, for example overseas holidays, are excluded from calculations. Rent or mortgage payments are also not included in the HEM.

According to the Australian Bureau of Statistics the average Australian household spent $1,425 a week in 2016.

How else are living expenses calculated?

Lenders can use different methods to calculate your living expenses, including looking at the size of your family and the number of dependants you have. A young couple with no children will most likely have fewer expenses than a family of five. A young single borrower with an active social life will probably spend more each week than a pensioner who no longer drives and owns their own home.

Lenders will scrutinise your spending in multiple categories. While every lender is different, common categories include:

• Travel and transportation
• Housing costs*
• Energy and utilities (including mobile and Internet plans)
• Education costs
• Health and fitness
• Groceries
• Eating out/entertainment
• Shopping

*Keep in mind that if you're buying a home to live in then you would not be paying rent at the same time as making repayments, so lenders won't typically consider this an expense. Instead, they'll look at all your other costs and calculate how much you can afford to borrow and repay.

Lenders also look at your income, debts and assets.

What is the Henderson Poverty Index?

The HPI is less commonly used and was originally based on a survey of New York families in the 1950s, but has been updated using more recent Australian survey data. The index is calculated based on a family of two adults and two children, and it can be multiplied by a specific fraction to calculate a figure that applies to different family structures.

Living expenses and your home loan application

When you apply for a home loan, you need to provide information about your living expenses. With some lenders this will simply mean providing a rough estimate of your weekly or monthly spend on essentials like rent, groceries, transport and utilities, but other lenders provide detailed calculators to garner a more accurate picture of your ongoing commitments.

The lender will then compare the living expenses figure you provide with the relevant HEM or HPI calculation for someone who lives in your area and has the same number of dependants.

There are plenty of free online living expenses calculators to help you work out your average weekly spend. You can also use our How much can I borrow calculator to determine your borrowing power.

How can I boost my borrowing power?

If you want to apply for a home loan and want to increase your borrowing power (or just strengthen your chances of getting the loan approved) there are a few steps you can take:

• Cut back your expenses. Lenders won't examine your entire life's worth of spending but they will look closely at the months leading up to your application. So before you apply, hold off on big purchases and try to trim down your spending.
• Increase your deposit size. If you can add a bit to your deposit your loan amount will shrink, increasing your chances of approval (or how much you can borrow).
• Reduce your debts. Focus on paying off urgent debts if you can before applying.
• Check your credit score. Your lender will look into your credit history, but you can check your credit score for free beforehand. This will help you find any nasty surprises or errors on your file.

While these tips can help strengthen your application, make sure you're borrowing an amount that you can comfortably repay.

Start comparing mortgages now

Use the table below to find home loan products, compare rates and see what your repayments will look like. This can give you a sense of what you can afford to borrow and how your lender will examine your expenses.

Name	Interest Rate p.a.	Comparison Rate p.a.	Fees	Monthly Payment
Unloan Variable Home Loan Principal & Interest20% min. depositOwner-occupierRefinance	Interest Rate 5.74%	Comparison Rate 5.65%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $876	Go to siteMore Info Compare
Up Home Loan Variable Rate Principal & Interest10% min. depositOwner-occupierOffset account	Interest Rate 6.15%	Comparison Rate 6.15%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $915	Go to siteMore Info Compare
loans.com.au Solar Home Loan Principal & Interest10% min. depositOwner-occupierOffset account	Interest Rate 5.99%	Comparison Rate 6.51%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $900	Go to siteMore Info Compare
Newcastle Permanent Building Society Real Deal Home Loan Principal & Interest20% min. depositOwner-occupierOffset account	Interest Rate 6.04%	Comparison Rate 6.08%	Fees Application: $595 Ongoing: $0 p.a.	Monthly Payment $905	Go to siteMore Info Compare	$2,000 refinance cashback offer Eligible refinancers who apply online and borrow $250K+ (LVR 80% or lower) can get a $2,000 cashback. Terms and conditions apply.
G&C Mutual Bank First Home Buyer Principal & Interest5% min. depositOwner-occupierOffset accountSpecial Offer	Interest Rate 6.19%	Comparison Rate 6.22%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $919	Go to siteMore Info Compare
Homestar Star Gold Principal & Interest30% min. depositOwner-occupierOffset account	Interest Rate 5.98%	Comparison Rate 5.98%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $899	Go to siteMore Info Compare
Bendigo Bank Express Variable Home Loan Principal & Interest10% min. depositOwner-occupierOffset account	Interest Rate 5.97%	Comparison Rate 6.12%	Fees Application: $250 Ongoing: $10 per month	Monthly Payment $898	Go to siteMore Info Compare
Tiimely Own Variable Rate Home Loan Finder AwardPrincipal & Interest10% min. depositOwner-occupier	Interest Rate 5.94%	Comparison Rate 5.95%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $895	Go to siteMore Info Compare
Macquarie Bank Basic Home Loan Principal & Interest40% min. depositOwner-occupier	Interest Rate 6.14%	Comparison Rate 6.16%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $914	Go to siteMore Info Compare
Mortgage House Chameleon Home Loan Principal & Interest50% min. depositOwner-occupierOffset account	Interest Rate 5.99%	Comparison Rate 6.03%	Fees Application: $600 Ongoing: $395 p.a.	Monthly Payment $900	Go to siteMore Info Compare
HSBC Home Value Loan Principal & Interest40% min. depositOwner-occupier	Interest Rate 5.99%	Comparison Rate 5.99%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $900	Go to siteMore Info Compare
Unloan Variable Home Loan Principal & Interest20% min. depositInvestmentRefinance	Interest Rate 6.04%	Comparison Rate 5.95%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $905	Go to siteMore Info Compare
Macquarie Bank Offset Home Loan Package Finder AwardPrincipal & Interest40% min. depositOwner-occupierOffset account	Interest Rate 6.14%	Comparison Rate 6.39%	Fees Application: $0 Ongoing: $248 p.a.	Monthly Payment $914	Go to siteMore Info Compare
Macquarie Bank Basic Home Loan Principal & Interest40% min. depositInvestment	Interest Rate 6.34%	Comparison Rate 6.36%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $934	Go to siteMore Info Compare
Macquarie Bank Basic Home Loan Principal & Interest20% min. depositOwner-occupier	Interest Rate 6.20%	Comparison Rate 6.22%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $920	Go to siteMore Info Compare
loans.com.au Variable Home Loan Principal & Interest10% min. depositOwner-occupier	Interest Rate 6.04%	Comparison Rate 6.06%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $905	Go to siteMore Info Compare
Macquarie Bank Offset Home Loan Package Finder AwardPrincipal & Interest20% min. depositOwner-occupierOffset account	Interest Rate 6.20%	Comparison Rate 6.45%	Fees Application: $0 Ongoing: $248 p.a.	Monthly Payment $920	Go to siteMore Info Compare
loans.com.au Solar Home Loan Principal & Interest10% min. depositInvestmentOffset account	Interest Rate 6.19%	Comparison Rate 6.58%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $919	Go to siteMore Info Compare
Up Home Loan Fixed Rate Principal & Interest 4Y Fixed10% min. depositOwner-occupierOffset account	Interest Rate 6.40%	Comparison Rate 6.24%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $940	Go to siteMore Info Compare
Up Home Loan Fixed Rate Principal & Interest 1Y Fixed10% min. depositOwner-occupierOffset account	Interest Rate 6.50%	Comparison Rate 6.19%	Fees Application: $0 Ongoing: $0 p.a.	Monthly Payment $949	Go to siteMore Info Compare

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