What Makes a Duplex Different When You Apply for a Home Loan
A duplex purchase requires a lender to value the property as either a single dwelling on one title or two dwellings on separate titles, and that distinction changes how some loan features and government schemes apply. Most duplexes in the ACT are structured as two units on a single community title or as separate unit titles, which means they fall under the off-the-plan unit duty exemption rather than the standard home buyer concession if purchased before completion. If the duplex is on two separate freehold titles and you are buying only one side, the purchase is treated the same as any other residential property for duty and lending purposes.
Consider a buyer who works for the ACT Government and is purchasing one side of a newly built duplex in Gungahlin valued at $650,000 on a unit title. That buyer qualifies for full conveyance duty exemption under the ACT Home Buyer Concession, which from 1 July 2026 applies regardless of property value or household income. The same buyer can access the Australian Government 5% Deposit Scheme with a $32,500 deposit, avoiding Lenders Mortgage Insurance entirely. The duplex is treated as a new home, so no grant applies in the ACT, but the duty saving alone is around $23,000.
If the duplex is off-the-plan and not yet titled, the off-the-plan unit duty exemption applies instead, with no value threshold from 1 July 2026. Both concessions deliver the same outcome for first home buyers: no duty payable.
How the 5% Deposit Scheme Works for Duplex Purchases
The Australian Government 5% Deposit Scheme does not restrict property type. A duplex is eligible provided the property is residential, the purchase price and lender valuation both sit at or below the ACT cap of $1,000,000, and the buyer meets the standard eligibility criteria. The scheme has no income cap and no annual place limit. Applications are made through a participating lender, not directly through Housing Australia.
Lenders assess duplexes the same way they assess any other residential property, but they do check whether the duplex is on a single title with both dwellings or whether each side is separately titled. If both sides are on one title and you are purchasing the entire duplex, some lenders may classify the property as an investment or dual-income property even if you intend to live in one side, which can affect serviceability. If you are buying one side of a duplex on a separate unit or community title, it is treated as an owner-occupied purchase.
The scheme works with fixed, variable or split loan structures depending on the participating lender. Not all lenders offer the same loan features under the scheme, so confirming offset account availability, redraw access and repayment flexibility before lodging your application is worthwhile.
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Stamp Duty Exemptions and How They Apply in the ACT
From 1 July 2026, the ACT Home Buyer Concession provides full exemption from conveyance duty for all first home buyers, regardless of the property value or household income. The property value cap and income threshold that applied before that date no longer exist. The only requirements are that you are an individual aged 18 or over, you have not held a relevant property interest before, and you will own and occupy the property as your principal place of residence for at least one continuous year starting within 12 months of settlement.
If the duplex is purchased off-the-plan and is unit-titled, the off-the-plan unit duty exemption applies instead. That exemption also has no value cap from 1 July 2026 and requires the buyer to occupy the property as their principal place of residence for at least one year starting within 12 months of completion. Whether you access the Home Buyer Concession or the off-the-plan exemption, the duty payable is nil.
Some buyers assume the exemption applies automatically, but you must lodge a declaration with the ACT Revenue Office confirming your eligibility. If you do not occupy the property as required, the concession can be clawed back, and duty becomes payable with interest.
Can You Use Help to Buy When Purchasing a Duplex in the ACT
Help to Buy is available in the ACT and allows the Australian Government to contribute up to 30% of the purchase price for an existing home or up to 40% for a new home in exchange for an equivalent equity share. A duplex qualifies as a new home if it has not been previously occupied and qualifies as an existing home if it has been lived in before. The scheme requires a minimum 2% deposit and applies income limits of $100,000 for individuals and $160,000 for couples or single parents.
The property price cap for Help to Buy in the ACT is confirmed using the postcode search tool at firsthomebuyers.gov.au. Help to Buy cannot be combined with the 5% Deposit Scheme, so you need to choose one or the other. If your income sits within the Help to Buy thresholds and you want to reduce your deposit and loan size by bringing in a government equity partner, Help to Buy can lower your ongoing repayments. If your income exceeds the threshold or you prefer full ownership from the start, the 5% Deposit Scheme is the more suitable option.
Help to Buy can be used alongside the ACT Home Buyer Concession or the off-the-plan unit exemption, so duty is still nil.
Income, Employment Stability and How Lenders Assess ACT Government Employees
ACT government employees are assessed on the same serviceability criteria as any other borrower, but stable public sector employment and predictable pay structures work in your favour. Lenders calculate serviceability using your gross income, existing debts, living expenses and a buffer applied to the loan's interest rate. If you have a permanent contract, your full base salary is used. If you are on a temporary or casual contract, some lenders will still use your full income provided you have worked continuously in the public sector for at least 12 months.
Allowances and overtime are treated differently depending on the lender. Most lenders will include regular allowances that appear on your payslip consistently over at least three to six months. Sporadic overtime or one-off payments are usually excluded. If you salary package or have pre-tax deductions for superannuation contributions, those deductions reduce your net income but do not reduce the gross income figure lenders use for serviceability, so they do not affect your borrowing capacity negatively.
If you hold a higher duties allowance or acting arrangement, confirm how long that arrangement is expected to continue. Some lenders will include acting pay if it has been in place for six months and is documented in a letter from your agency.
How Much Deposit You Actually Need and Where It Can Come From
Under the 5% Deposit Scheme, you need 5% of the purchase price as your deposit. That deposit must be genuine savings, which means funds you have saved over at least three months in your own account, or funds received as a gift from an immediate family member with a signed declaration. Equity from another property, proceeds from the sale of assets, or funds from the First Home Super Saver Scheme also count as genuine savings.
You also need to budget for settlement costs, which include government fees, lender establishment fees, conveyancing or legal costs, and building and pest inspections if the contract is not unconditional. For a $650,000 duplex purchase in the ACT, settlement costs typically sit between $8,000 and $12,000 depending on your lender and conveyancer. Some lenders allow you to capitalise the establishment fee into the loan, which reduces the cash you need at settlement but increases your loan balance.
If you have accessed the First Home Super Saver Scheme, you can withdraw up to $50,000 of eligible contributions to use toward your deposit. You need to apply to the ATO for a determination before signing your contract. Funds are released after you provide a signed contract of sale. The release is not instant, so factor in processing time when planning your settlement timeline.
Loan Features That Matter for Owner-Occupiers Buying a Duplex
An offset account links to your home loan and reduces the interest charged on your loan balance by the amount sitting in the offset account. If your loan balance is $600,000 and you hold $20,000 in a 100% offset account, you only pay interest on $580,000. Offset accounts are available on variable rate loans and some split loan structures, but not on most fixed rate loans. If you are using the 5% Deposit Scheme, check whether your chosen participating lender offers offset accounts under the scheme, because not all lenders do.
Redraw allows you to access extra repayments you have made above your minimum monthly repayment. It is available on most variable and fixed loans, but some lenders restrict redraw on fixed loans or charge a fee per withdrawal. If you are planning to make extra repayments and want flexible access to those funds, confirm redraw terms before settling on a loan product.
If you are weighing up a fixed rate, a variable rate or a split, think about your repayment strategy and your tolerance for rate movements. A fixed rate locks in your repayment amount for the fixed period, but you lose offset functionality and may face break costs if you repay the loan early. A variable rate gives you full access to offset and redraw and allows unlimited extra repayments, but your repayment amount can increase if rates rise. A split loan divides your balance between fixed and variable portions, giving you some rate certainty and some flexibility.
What Happens After You Get Pre-Approval
Pre-approval confirms how much a lender is willing to lend you based on your income, debts and expenses, but it is conditional on the property meeting the lender's valuation and security requirements. Once you have signed a contract to purchase a duplex, the lender orders a valuation. The valuer inspects the property and provides a report to the lender confirming whether the property is worth the contract price. If the valuation comes in below the contract price, the lender will only lend against the lower valuation figure, and you will need to make up the difference with additional deposit funds.
For duplex purchases, valuers assess whether the property is a single dwelling, two dwellings on one title, or two separately titled dwellings. They also check comparable recent sales of similar properties in the same area. In established suburbs like Tuggeranong or Belconnen, duplex sales data is relatively consistent. In newer areas like Gungahlin or Molonglo Valley, where duplex developments are more recent, comparable sales may be less frequent, and valuers rely more heavily on recent unit sales or similar builds.
If the valuation is satisfactory and all other conditions are met, the lender issues formal approval and prepares loan documents for settlement. Your conveyancer coordinates settlement with the seller's representative and the lender, and funds are transferred on the settlement date. You receive the keys once settlement is complete and title is registered.
How to Structure Your Application When Buying as a Couple or with a Co-Borrower
If you are applying jointly with a partner or co-borrower, the lender assesses both incomes and both sets of liabilities. Joint applications increase your combined borrowing capacity, but they also mean both applicants are equally responsible for the loan. If one applicant has existing debt such as a car loan, credit card limit or HECS-HELP debt, that liability is factored into serviceability even if the debt is only in one name.
For scheme eligibility, both applicants must meet the first home buyer criteria. If one applicant has owned property before, you will not qualify for the ACT Home Buyer Concession, the 5% Deposit Scheme, or Help to Buy. If you are purchasing with a co-borrower who is not your spouse or partner, such as a sibling or friend, lenders assess the application the same way, but you should document how ownership, repayment responsibility and exit arrangements will be managed if one party wants to sell or refinance in the future.
Some lenders allow you to add a non-borrowing spouse to the title without adding them to the loan, but that structure is less common and depends on the lender's policy and the deposit size. If you are considering that arrangement, discuss it with your broker before lodging your application.
Why Talking to a Broker Who Works with Public Sector Employees Makes a Difference
Public sector employment gives you access to certain lender policies that are not widely advertised, including LMI waivers at higher loan-to-value ratios for specific agencies and salary packaging arrangements that other borrowers cannot access. A broker who works regularly with ACT Government employees knows which lenders assess public sector income most favourably, which lenders offer offset accounts under the 5% Deposit Scheme, and how to structure your application when you hold allowances, higher duties or acting arrangements that might otherwise be excluded.
Brokers also manage the coordination between your conveyancer, the lender's valuer, and the settlement agent, which reduces the chance of delays. For first home buyers purchasing a duplex, where scheme eligibility, duty exemptions and loan structure all need to align, having someone confirm that each part is lodged correctly and on time avoids last-minute issues that can push out settlement or cost you the property.
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Frequently Asked Questions
Can I use the 5% Deposit Scheme to buy a duplex in the ACT?
Yes, the 5% Deposit Scheme applies to duplex purchases provided the property is residential, the purchase price and valuation both sit at or below $1,000,000, and you meet the first home buyer eligibility criteria. The scheme has no income cap and applications are made through a participating lender.
Do I pay stamp duty when buying a duplex as a first home buyer in the ACT?
No, from 1 July 2026 the ACT Home Buyer Concession provides full exemption from conveyance duty for all first home buyers regardless of property value or income. If the duplex is purchased off-the-plan, the off-the-plan unit duty exemption applies instead, also with no value cap.
How much deposit do I need to buy a duplex with the 5% Deposit Scheme?
You need 5% of the purchase price as your deposit, which must be genuine savings or gifted funds. You also need to budget separately for settlement costs, which typically range from $8,000 to $12,000 depending on the lender and conveyancer.
Can I use Help to Buy to purchase a duplex in the ACT?
Yes, Help to Buy is available in the ACT and can be used to purchase a duplex. The Australian Government contributes up to 30% for an existing home or 40% for a new home in exchange for equity. Income limits apply: $100,000 for individuals and $160,000 for couples or single parents.
Will my acting allowance or higher duties be included in my borrowing capacity?
Most lenders will include acting pay or higher duties if the arrangement has been in place for at least six months and is documented in a letter from your agency. Confirm the expected duration of the arrangement when applying, as lenders assess temporary allowances differently.
