Rental Property Depreciation Calculator

What Is Rental Property Depreciation?

Every rental property contains assets that lose value over time — hot water systems, carpet, air conditioners, appliances. The ATO lets you claim this loss of value as a tax deduction, even though you haven't spent any additional money. It's called depreciation, and it's one of the most commonly missed deductions among self-managing landlords.

Depreciation is a non-cash deduction. Unlike repairs or insurance premiums, you don't need to outlay money each year to claim it. You simply calculate the annual decline in value of your rental property assets and include it in your tax return. For a typical rental property, depreciation on plant and equipment alone can be worth several hundred to several thousand dollars per year in tax deductions — money that many landlords leave on the table because they either don't know they can claim it or find the calculations confusing.

This calculator covers Division 40 depreciation — the decline in value of plant and equipment assets in your rental property. Enter your asset details and the calculator will show you exactly how much you can claim each year, using the ATO's effective life tables and official formulas.

How Rental Property Depreciation Works

Australian tax law provides two separate types of depreciation deduction for rental properties, and it's important to understand the difference because they're governed by different rules.

Division 40 covers plant and equipment — these are the removable or mechanical assets within your property. Think of anything that isn't the building itself: hot water systems, carpet, blinds, air conditioners, ovens, dishwashers, smoke alarms, ceiling fans, and similar items. Each of these assets has an effective life determined by the ATO, and you claim their decline in value over that period. This calculator handles Division 40 assets.

Division 43 covers capital works — the building structure itself, including walls, floors, roofing, doors, windows, plumbing within walls, and fixed electrical wiring. For residential properties where construction commenced after 15 September 1987, you can generally claim 2.5% of the construction cost each year for 40 years. Properties built between 18 July 1985 and 15 September 1987 may qualify at 4% per year for 25 years. Structural improvements such as retaining walls and in-ground pools qualify only if construction commenced after 26 February 1992. Division 43 deductions typically require a quantity surveyor's report to establish the construction cost, and they aren't affected by the second-hand asset restrictions that apply to Division 40. Division 43 is not covered by this calculator.

The key distinction is simple: if you could theoretically remove it from the property and take it with you, it's likely a Division 40 asset. If it's part of the building fabric, it's Division 43.

Depreciation Methods Explained

The ATO gives you two methods for calculating the decline in value of your Division 40 assets. Once you choose a method for an asset, you must continue using that method for the life of that asset — you can't switch partway through.

Diminishing value method — This method front-loads your deductions. The deduction is largest in the first year and decreases each subsequent year, because it's calculated as a percentage of the asset's remaining value rather than its original cost. The formula is:

Deduction = Base Value × (Days held ÷ 365) × (200% ÷ Effective Life)

In the first year, the base value equals the asset's cost. In subsequent years, the base value is the opening adjustable value (the previous year's closing value). This method gives you higher deductions in the early years, which is better for cash flow if you want to maximise deductions sooner.

Prime cost method — This method spreads deductions evenly across the asset's effective life. You claim the same dollar amount each year (pro-rated for partial years). The formula is:

Deduction = Asset's Cost × (Days held ÷ 365) × (100% ÷ Effective Life)

In these formulas, 100% means 1.0 and 200% means 2.0. You divide that number by the asset's effective life to get the annual rate: for example, a 10-year asset has a 10% prime cost rate or a 20% diminishing value rate for a full year. It does not mean you claim 100% or 200% of the asset's cost in one year.

The deduction is calculated against the original cost every year, not the reducing balance. This method is simpler and produces a higher total deduction in the later years of an asset's life. It can be better if you plan to hold the property long-term and want consistent, predictable deductions.

Worked Example: $2,000 Hot Water System, 12-Year Effective Life

Using diminishing value: $2,000 × (365 ÷ 365) × (200% ÷ 12) = $333.33 in year one. In year two, the base value drops to $1,666.67, giving a deduction of $277.78.

Using prime cost: $2,000 × (365 ÷ 365) × (100% ÷ 12) = $166.67 every full year for 12 years.

The diminishing value method gives you $333.33 in the first year compared to $166.67 under prime cost — exactly double. However, the prime cost deductions stay at $166.67 for the full 12 years, while diminishing value deductions shrink each year. Over the full effective life, the total deductions are the same under both methods (equal to the asset's cost), but the timing differs significantly.

Which should you choose? If you want to maximise your deductions in the early years — particularly useful if you're negatively geared — choose diminishing value. If you prefer simplicity and plan to hold the property for a long time, prime cost gives you predictable, level deductions each year. Use our Negative Gearing Calculator to see how depreciation deductions affect your overall tax position.

ATO Effective Life Table — Common Rental Property Assets

The following table lists the ATO's determined effective lives for assets commonly found in residential rental properties. These figures are sourced from the Rental Properties Guide 2025 (NAT 1729) and apply to assets acquired from 1 July 2019 onwards. The calculator uses these effective lives as defaults. You can also self-assess a different effective life if your circumstances warrant it, in accordance with ATO guidelines.

Source: ATO Rental Properties Guide 2025 (NAT 1729), Tables 3–6 and supplementary asset tables. The current ATO effective life determination is Income Tax Assessment (Effective Life of Depreciating Assets) Determination 2025 (LI 2025/20).

Items marked "Capital works deduction" in the ATO tables are Division 43 items — they are not depreciable under Division 40 and are excluded from this table and calculator. If an asset isn't listed above, users can select "Other (custom)" in the calculator and enter their own effective life.

The Second-Hand Asset Rule

If you purchase a rental property that already contains Division 40 assets — carpet laid by the previous owner, an existing hot water system, built-in air conditioning — you generally cannot claim depreciation on those second-hand assets if you acquired the property after 7:30 pm on 9 May 2017.

This rule applies to residential rental property owners who are individual taxpayers. The restriction does not apply if you are using the property to carry on a business (including a business of letting rental properties) or if you are an excluded entity (such as a company, public unit trust, managed investment trust, qualifying super fund that is not a self-managed super fund, or a unit trust or partnership where all members are one of these entity types).

The rule also does not affect new assets that you purchase and install yourself. If you buy a brand-new dishwasher and install it in your rental property, you can claim its full depreciation regardless of when you bought the property. The restriction only targets assets that were previously used or installed by someone else.

Importantly, if you buy a newly built property from a developer, and no one was previously entitled to a deduction for the assets within it, those assets are treated as new — not second-hand — even though they were installed before your purchase. The same applies if you purchase a property within six months of it being built or substantially renovated.

Low-Value Pooling and Instant Write-Off

Not every asset needs to be depreciated over its full effective life. The ATO provides two shortcuts for lower-value items.

Assets costing $300 or less can be written off immediately in the year you start using them, provided the asset is not part of a set of assets that together cost more than $300, and you use the asset predominantly (more than 50%) for producing non-business assessable income. For rental property owners, this means items like a $150 smoke alarm or a $250 set of blinds for a single window can be claimed in full in the year of purchase rather than depreciated over several years.

For assets that started with a higher cost but have depreciated down to a written-down value below $1,000, you can transfer them into a low-value pool. Assets in the pool are depreciated together at a flat rate of 37.5% (diminishing value) each year. In the first year an asset enters the pool, the rate is halved to 18.75% to account for the fact that assets may enter the pool at different times during the year.

Once you create a low-value pool, all future low-cost assets must go into it. Low-value assets (those whose written-down value has fallen below $1,000) can be added on an asset-by-asset basis at your discretion.

The calculator does not model low-value pooling, but it will flag when an asset's written-down value falls below $1,000 in the year-by-year schedule, alerting you that you may be eligible to transfer it to a low-value pool.

Common Mistakes Landlords Make

Many self-managing landlords miss out on legitimate depreciation deductions or make errors that could attract ATO scrutiny. Here are the most common pitfalls.

Not claiming depreciation at all is the biggest missed opportunity. Because depreciation doesn't require a cash outlay, it's easy to overlook — but it can represent thousands of dollars in deductions over the life of your assets. If you've installed any new items in your rental property, you should be tracking their depreciation.

Confusing repairs with capital improvements is another frequent error. Replacing a broken tap with a like-for-like replacement is a repair — fully deductible in the year incurred. But upgrading from a basic tap to a premium mixer tap is a capital improvement — it must be depreciated over the new asset's effective life. The ATO draws a clear line: a repair restores an asset to its previous condition, while an improvement goes beyond that. Getting this wrong can trigger an audit adjustment.

Claiming second-hand assets in properties acquired after 9 May 2017 is a common mistake for landlords who aren't aware of the rule change. If you purchased an established property and are claiming depreciation on the existing carpet, hot water system, or air conditioning, you may be overclaiming unless you fall within one of the exceptions.

Not getting a quantity surveyor report for Division 43 deductions is another missed opportunity. Division 43 (capital works) deductions — typically 2.5% of construction cost per year for properties built after 15 September 1987 — often represent the largest single depreciation claim for a rental property. But without a quantity surveyor's report establishing the construction cost, most landlords simply don't claim it. The cost of the report (usually $300–$700) may itself be deductible depending on your circumstances, so confirm the treatment with a qualified tax professional.

Failing to track the date an asset was first used or installed ready for use is a record-keeping gap that causes problems. This date determines the first-year pro-rata calculation and is essential for accurate depreciation schedules.

How Landlord Wise Helps

Depreciation is one of many tax deductions available to rental property owners, and keeping track of them all — across multiple assets, multiple properties, and changing ATO rules — can be overwhelming.

Landlord Wise is built for self-managing landlords who want to stay on top of their obligations without paying property management fees. The Wise AI assistant can answer your depreciation questions grounded in ATO source documents, so you get accurate, referenced answers — not generic advice. The platform helps you track property assets and expenses throughout the year, making tax time significantly less painful.

Check out our landlord guides for more detailed information on managing your rental property in Australia.

Frequently Asked Questions

What is the difference between Division 40 and Division 43 depreciation?

Division 40 covers plant and equipment — removable or mechanical assets like hot water systems, carpet, blinds, appliances, and air conditioners. These are depreciated over their individual effective lives using either the diminishing value or prime cost method. Division 43 covers capital works — the building structure itself, including walls, floors, roofing, and fixed installations like plumbing and wiring. Capital works are generally claimed at 2.5% of construction cost per year over 40 years for residential properties where construction commenced after 15 September 1987. Properties built between 18 July 1985 and 15 September 1987 may qualify at 4% per year.

Can I claim depreciation on second-hand assets in my rental property?

If you acquired your property after 7:30 pm on 9 May 2017, you generally cannot claim Division 40 depreciation on second-hand plant and equipment — meaning assets that were previously installed or used by someone else. This includes existing carpet, hot water systems, and appliances that came with the property. However, you can claim depreciation on any new assets you purchase and install yourself. Exceptions apply if you use the property to carry on a business or are an excluded entity such as a company or qualifying trust.

What depreciation method should I choose — diminishing value or prime cost?

The diminishing value method gives you larger deductions in the early years and smaller deductions later. This is generally better if you want to maximise your cash flow benefit sooner — particularly useful if you're negatively geared. The prime cost method gives you equal deductions each year, which is simpler and can be better if you plan to hold the property long-term. Once you choose a method for an asset, you must continue using it for that asset's entire life.

Do I need a quantity surveyor to claim depreciation?

For Division 40 (plant and equipment) depreciation, you don't necessarily need a quantity surveyor — you can identify assets and their costs yourself if you purchased and installed them. However, if you bought a property with existing assets and need to determine their cost (to establish whether they're new or for record-keeping purposes), a quantity surveyor's report is strongly recommended. For Division 43 (capital works) depreciation, a quantity surveyor or similarly qualified professional is effectively essential, as you need an estimate of the original construction cost to calculate the annual 2.5% deduction.

Can I claim depreciation if my rental property is negatively geared?

Yes. Depreciation deductions increase your rental loss, which then offsets your other income (such as salary or wages), reducing your overall taxable income. This is one of the key benefits of negative gearing — depreciation is a non-cash deduction that increases your tax refund without requiring any additional spending.

What happens to depreciation when I sell my rental property?

When you sell a rental property, a balancing adjustment occurs for each depreciating asset. If you receive more for an asset than its written-down value (adjustable value), the difference is included in your assessable income. If you receive less, you may be able to claim a deduction. Additionally, for Division 43 capital works deductions, any deductions you've claimed will reduce the cost base of your property for capital gains tax purposes, potentially increasing your capital gain on sale.

Can I change my depreciation method after I've started claiming?

No. Once you choose either the diminishing value or prime cost method for a particular asset, you must continue using that method for the life of that asset. You can choose different methods for different assets — for example, diminishing value for your hot water system and prime cost for your carpet — but each individual asset is locked in once you start claiming.

What if my asset isn't in the ATO's effective life table?

If the ATO hasn't determined an effective life for your particular asset, you can make your own estimate. The ATO requires you to consider factors including: the asset's physical life, manufacturer specifications, your expected usage conditions, maintenance practices, and the experience of other users of similar assets. Your self-assessed effective life should be reasonable and supportable — keep records of how you arrived at your estimate.