When a non-resident sells Australian property, every dollar spent on improvements, renovations, and capital works can directly reduce the capital gain the ATO taxes. The rules determining which costs qualify, at what rate, and in which category are precise. Getting them wrong inflates your taxable gain. Getting them right can be the difference of tens of thousands of dollars on a single sale, particularly given that non-residents have already lost access to the 50% Capital Gains Tax (CGT) discount available to Australian residents.
TL;DR: Key Takeaways
- Repairs are deductible as rental expenses; renovations and capital works are not deductible upfront but reduce your CGT cost base.
- Capital works (Division 43) are claimed at a rate of 2.5% per year and, importantly, claimed deductions reduce your cost base when you sell [1].
- Non-residents cannot access the 50% CGT discount, making cost base accuracy even more financially significant than it is for residents. From 1 July 2027, new legislation replaces the 50% CGT discount with cost-base indexation; residents can still use the discount for gains accrued before that date, and foreign residents generally cannot access it.
- Foreign resident CGT withholding applies to most property sales by non-residents in 2026 and must be factored into sale settlement planning.
- Misclassifying an improvement as a repair is a common ATO audit trigger for rental property owners.
What Is the Difference Between a Repair, a Renovation, and Capital Works?
These three categories sit at the heart of property taxation, and the ATO draws hard lines between them. Understanding the distinction is not optional for non-residents; it shapes both your annual rental deductions and your final CGT cost base.
- Repair: Restores a defective or damaged part of the property to its original condition without improving it. A broken fence repaired with the same materials is a repair. Deductible in the income year incurred.
- Renovation / Capital Works (Division 43): Work that improves the property beyond its original state, adds new functionality, or changes its character [2]. Renovations fall under capital works [2]. A new kitchen installed where an old one existed is an example. These costs are not immediately deductible; instead they are claimed at 2.5% per year over 40 years from the date the work was completed [1].
| Category | ATO Treatment | CGT Cost Base Impact |
|---|---|---|
| Repair | Rental deduction in year incurred | No direct impact |
| Renovation / Capital Works (Div 43) | 2.5% annual deduction during ownership | Claimed deductions reduce cost base on sale [1] |
Why Does This Matter More for Non-Residents Than for Australian Residents?
The financial stakes of these classifications are higher for non-residents because of a fundamental asymmetry in the CGT rules. Australian tax residents who hold a property for more than 12 months can access a 50% CGT discount, which halves the taxable gain before applying their marginal rate. Non-residents cannot access this discount.
This means every dollar of legitimate cost base entitlement you claim as a non-resident carries roughly twice the tax value it would for an Australian resident in the same position. A $40,000 renovation correctly added to the cost base reduces a non-resident’s taxable gain by $40,000, whereas the equivalent benefit for a resident is partially absorbed by the 50% discount mechanism. The precision with which you document and categorise improvements is, in practical terms, a direct lever on your tax liability.
How Does the ATO Calculate the Cost Base for Capital Works?
The cost base is the foundation of every CGT calculation, and capital works interact with it in a way that surprises many property owners. The general principle is that capital expenditure you incurred to improve the property forms part of your cost base under the third element of the five-element cost base framework.
Capital works deductions, however, introduce a complication. If you claimed Division 43 deductions during your ownership period, the ATO reduces your cost base by those amounts when you sell [1]. The logic is that you have already received a tax benefit during the ownership years; you cannot count the same expenditure twice.
Step-by-step: How Capital Works Affect Your Sale Calculation
- Identify qualifying capital works and their construction cost [3].
- Calculate the total Division 43 deductions claimed at 2.5% per year over your ownership period [1].
- Add the original capital works expenditure to your cost base.
- Subtract the total deductions previously claimed from the cost base.
- The net amount is what reduces your capital gain.
This is one of the most commonly miscalculated figures in non-resident property disposals. Owners who engaged a quantity surveyor when they bought the property and diligently claimed their 2.5% each year sometimes forget to account for those claimed amounts when calculating the cost base at sale.
What Counts as a Capital Improvement for CGT Cost Base Purposes?
Building on the distinction above, the practical question is which specific works qualify for cost base inclusion. The ATO’s position is that a capital improvement must be work that enhances the asset beyond its state when you acquired it, or creates a new asset component [2].
- Adding a second bathroom where none existed before
- Converting a garage into a habitable room
- Full kitchen replacement that upgrades the standard of finishes
- New deck or outdoor structure
- Re-roofing with a superior material where the old roof was functional (not simply damaged)
Work that merely restores the property to its condition at purchase, even if it costs a significant amount, sits in the repair category and does not add to the cost base. The ATO pays close attention to initial repairs, which are improvements made shortly after purchase to defects that existed at acquisition and are therefore not immediately deductible at all.
How Does Foreign Resident CGT Withholding Interact With This Calculation?
A separate but related issue is that when a non-resident sells Australian property in 2026, the buyer is generally required to withhold a percentage of the purchase price and remit it directly to the ATO under the foreign resident CGT withholding rules. This is not a final tax; it is a credit against your assessed CGT liability.
The distinction between withholding and actual tax liability is where cost base precision becomes operationally important. Your final CGT assessment will be based on the capital gain calculated using your full, correctly documented cost base (including capital works and renovations). If your cost base is well-documented and your actual tax is lower than the amount withheld, you receive a refund. If your cost base is incomplete or misclassified, you may pay more than necessary and then need to recover it through a tax return.
Non-residents who have owned property for years, undertaken multiple rounds of improvement, and claimed capital works deductions annually need a reconciled cost base statement before settlement to understand how their actual liability compares to what will be withheld.
Frequently Asked Questions
About ODIN TaxODIN Tax is Australia’s specialist tax agent practice for Australian expats and non-residents, operating as part of ODIN alongside ODIN Mortgage. Led by Tax Director Pau Lam, with over a decade of specialist experience in Australian expat tax, ODIN Tax has served 2,300+ clients across 40+ countries and holds a 4.9/5 Google rating from 400+ verified reviews. As a Registered Australian Tax Agent headquartered in Hong Kong, ODIN Tax brings together non-resident CGT expertise, capital works analysis, and foreign resident CGT withholding management in a practice built exclusively around the non-resident tax landscape. Unlike generalist accounting firms, ODIN Tax works with mortgage broking and property settlement specialists to ensure cost base planning starts at acquisition, not after the contract is signed.
Selling Australian property as a non-resident?
Your cost base, capital works history, and withholding position all need to be reconciled before settlement. ODIN Tax’s specialist team manages the full picture so you don’t leave money on the table.
