In short: When you move from renting to owning, the repayment replaces the rent, but a second layer of costs appears that renters never see: council rates, water service charges, building insurance, owners corporation fees on units and townhouses, maintenance, and the need to hold a buffer against rate rises. Budget for these as a monthly figure alongside the repayment, and keep at least two to three months of total housing costs in an offset account.
Key takeaways
- The mortgage repayment is usually 75% to 85% of your true monthly housing cost; the rest is rates, insurance, water, maintenance and fees.
- Units and townhouses swap some maintenance for an owners corporation levy, which is compulsory and can be increased by special levy.
- Lenders assess you at your rate plus 3 percentage points; your budget should at least survive a 1 percentage point rise.
- A buffer of two to three months of total housing costs, held in an offset, is the single best protection against a bad year.
- Build the whole budget before you make an offer, not after settlement.
Every renter knows their weekly rent to the dollar. Almost no first home buyer knows their weekly cost of ownership until the first council rates notice arrives. The gap between the two is the budget shock, and it is entirely predictable. This checklist walks through every line item, with a worked budget for a typical purchase in Melbourne's north, so the first year of ownership is boring rather than frightening.
The costs renters never pay
Council rates
Every property in Victoria pays rates to its council, calculated on the property's valuation. They are billed annually with quarterly instalment options. In growth areas the bill also includes waste and other service charges. Your conveyancer will adjust rates at settlement so you pay only from the day you own, then the full bill is yours.
Water service charges
As a renter you may have paid usage. As an owner you also pay the fixed service and parks charges from the water authority. Again, adjusted at settlement, then yours.
Building insurance
Your lender will require the building to be insured from the day you sign an unconditional contract in Victoria, because risk passes to the buyer at that point. Landlords carried this for you as a renter. Contents insurance is separate and optional but sensible.
Owners corporation fees
If you buy a unit, apartment or many townhouses, you join an owners corporation. Fees cover building insurance, common area maintenance, management and a sinking fund. They are set at the annual general meeting and can be topped up by a special levy for major works such as a roof or lift. Read the owners corporation certificate in the Section 32 before you buy. Our owners corporation and strata page explains what to look for.
Maintenance and repairs
The landlord used to fix the hot water service. Now you do. A common rule of thumb is to set aside around 1% of the property's value each year for maintenance on an established home; new homes need less in the early years but still need gutters cleaned, appliances serviced and gardens established. Budget for it monthly even in the years you spend nothing, because the year you do spend it will be a big one.
Worked budget: a $650,000 house in Mernda
For illustration, a couple buys an established house in Mernda for $650,000 with a $585,000 loan (10% deposit, LMI applicable) at 6.00% p.a. over 30 years. The figures below other than the repayment are illustrative placeholders; put your own numbers in.
| Monthly cost | Renting the same house (illustrative) | Owning |
|---|---|---|
| Rent or repayment | $2,600 | $3,507 |
| Council rates and waste charges | Nil | Illustrative $180 |
| Water service charges | Usage only | Illustrative $70 |
| Building insurance | Nil | Illustrative $150 |
| Contents insurance | Optional | Optional |
| Maintenance fund (about 1% of value a year) | Nil | $540 |
| Total | About $2,600 | About $4,450 |
The repayment is about $900 more than the rent. The full cost of ownership is about $1,850 more. That second figure is the one to test against your take-home pay. Run your own comparison in the rent vs buy calculator and get the repayment from the mortgage repayment calculator.
The same budget for a townhouse
Swap the house for a $580,000 townhouse in South Morang with a $522,000 loan. The repayment drops to $3,130 a month. Building insurance moves into the owners corporation levy, and the maintenance fund can be smaller because external works are shared, but the levy itself is an extra line, and a special levy can arrive without warning. The total often lands in a similar place to the house.
Rate rises: the buffer question
Lenders assess your loan at your rate plus 3 percentage points, which is the APRA serviceability buffer. That protects the lender. For your own budget:
| Loan | Repayment at 6.00% p.a. | At 6.25% | At 7.00% |
|---|---|---|---|
| $522,000 | $3,130 | $3,214 | $3,473 |
| $585,000 | $3,507 | $3,602 | $3,892 |
| $650,000 | $3,897 | $4,002 | $4,324 |
A single 0.25 percentage point move adds around $95 a month on the Mernda loan. A full percentage point adds $385. If your budget cannot absorb the 7.00% column, you are buying too much house. The RBA cash rate sits at 4.35% at the time of writing, with the next decision due on 29 September 2026; the RBA's own site publishes every decision.
The buffer, and where to keep it
Aim to settle with two to three months of total housing costs, not just repayments, sitting in an offset account. On the Mernda budget that is roughly $9,000 to $13,500. An offset reduces the interest you pay while the money sits there and stays available for the day the hot water service dies. Our offset calculator shows the interest saved.
If a rate rise or a job change pushes you into difficulty, act early. Lenders have hardship processes and you have legal rights; our mortgage stress guide and financial hardship rights page explain them, and Moneysmart has free budgeting tools.
The pre-purchase budget checklist
- Get the repayment for your actual loan size at your actual rate, then at 1 percentage point higher.
- Ask the agent or conveyancer for the last rates notice and water bill; both are in or adjacent to the Section 32.
- Get an insurance quote on the property address before you make an offer.
- For units and townhouses, read the owners corporation certificate: current levies, sinking fund balance, any planned special levies.
- Add a maintenance line of about 1% of value a year, divided by 12.
- Total everything and compare it with your current rent plus what you were saving. The difference must fit inside your take-home pay with room to spare.
- Confirm your upfront costs separately with the upfront costs calculator: deposit, duty, conveyancing, inspections and moving are one-off; this checklist is the ongoing side.
- Set up the offset buffer before settlement, not after.
Frequently asked questions
Why is my repayment so much more than my rent for the same house?
Rent reflects what the market will pay for the use of the property. A repayment reflects the price of the property, the interest rate and the loan term, and it includes principal, which is money you keep. In many Melbourne suburbs a repayment exceeds rent for the same home, particularly in the first years of a loan. The offset is that you own the growth and the equity.
How much should I hold in an emergency buffer after buying?
Two to three months of total housing costs is a sensible floor, and more if your income is variable or you are on a single income. Lenders also look favourably on applicants with savings left after settlement. Hold it in an offset account linked to your loan so it saves interest while it waits.
What if I have already bought and the budget is not working?
Contact your broker or lender early. Options include refinancing to a lower rate, restructuring to interest-only for a short period, extending the loan term, or a formal hardship variation. Acting before you miss a repayment keeps your credit file clean and gives you the most options.
Talk to GNT Finance
Before you make an offer, Gorakh Timilsina will build your full ownership budget with you, including a stress test, so the first year is boring in the best possible way. There is no cost to you for our home-loan service in most cases. Book a free consultation or call 0426 403 703.
Written by Gorakh Timilsina
Founder, CEO & Senior Mortgage Consultant at GNT Finance. Gorakh started as a broker assistant, spent years as a senior credit officer assessing loan applications, and now helps Melbourne families get the right loan approved. English, Nepali and Hindi spoken.