The future tax effect of claiming building depreciation & instant write-off depreciation on business equipment

Like many West Australians, you might not be aware that deductions based on depreciation could come back to bite you with a heavy tax bill. This is even more true for people who are claiming depreciation on investment properties or businesses that took advantage of limited-time COVID-induced tax write-offs. 


The big tax sting is a result of a lack of understanding around the rules of claiming depreciation. To make matters worse, these rules are always changing. Perhaps the potential consequences weren’t made clear, or perhaps people were so enticed by COVID-inspired depreciation arrangements that they didn’t care to research beforehand. Either way, under current tax laws, expenses incurred in generating tax-assessable income can be deducted from that income, and you pay tax on what's left. 


How do tax deductions work? 

There are two depreciation methods used — diminishing value and straight-line. Let’s consider the straight-line method (which is more popular): a tradie might buy a $55,000 vehicle for work purposes, which has an effective life of eight years. Under straight-line depreciation rules, the cost is divided by the life, giving the tradie a tax deduction of $6,875 a year for the next eight years. If you’re interested, the effective life for almost every asset imaginable is available on the Australian Tax Office website. 


The problem, or challenge, with depreciation is that if this tradie sells the work vehicle, and the price is higher than the written down value, that extra amount becomes taxable income — a rule many aren’t aware of. 


If your business used the COVID immediate write-off rules, it means the written down value is zero dollars. So, any proceeds on the sale will be assessable and form part of the business taxable income. 


Property investors face similar issues when claiming depreciation and a capital allowance on their investment property. Buildings have an effective life of up to 40 years but property equipment, such as hot water systems and air-conditioning, have different lifespans. 


A qualified quantity surveyor can prepare a special schedule on behalf of investors, as a basis for tax deductions. Based on these schedules, deductions of up to $20,000 are common. However, like our tradie example, there is a problem: the amount claimed reduces the cost-base used for capital gains tax calculations. 


Let’s say the owner of a $500,000 investment property claims $20,000 a year building depreciation. After five years, the owner sells the property for $800,000. Sounds great, but the capital gains tax calculations will be based on a $400,000 profit, not a $300,000 profit… That's because the cost base has been reduced by five times the $20,000 (for a total of $100,000). Now, that comes off the original purchase price of $500,000. 


What do we learn from this? 

Deductions seem like a good idea on the surface — and they certainly can be in the right circumstances — but they can end up costing you. Remember, just because you’re getting a larger tax deduction now doesn’t mean there won’t be additional tax in the future. “Additional” meaning, you only have to pay these taxes because you initially chose a tax-deductible path. 


Want more deduction support? 


If you're tempted by anything involving tax, it’s so important to talk with a tax expert. Australian tax laws can be incredibly confusing, and it can be difficult to keep up with how tax laws change, and how those changes affect you. When you sit down with a professional from Ascent Accounting, we’ll talk through all the aspects with you and let you know of any certain, or possible, implications around your specific tax deduction choices. So, contact us today.

Need help with your accounting?

Find Out What We Do
June 12, 2025
June is zooming by! Here’s another handy checklist for business owners—let’s get you sorted for EOFY and tick off those to-dos.
June 12, 2025
EOFY is almost here. Are you ready? Now’s the time to get your finances in order and maximise your tax return. Our latest guide covers top tax deductions, super contributions & co-contributions, SMSF must-dos, PAYG instalment tips and a 30 June checklist.
June 12, 2025
Whether you're a first-time landlord or managing multiple properties, understanding what you can claim at tax time can make a big difference to your bottom line. In our latest blog, we break down the most common (and often overlooked) deductions.
May 12, 2025
Buying and selling property rarely lines up perfectly. The logistics of it all can be incredibly stressful. If you’ve found the perfect next home but haven’t sold your current one yet, a bridging loan can make your move easier, without having to wait on your current property sale.  What is a bridging loan? A bridging loan is a short-term loan that gives you the funds to buy a new property before your current property has sold. It’s designed to bridge the gap between buying and selling. These loans are generally interest-only and are typically offered for up to 12 months, giving you time to sell and settle on your current home while already owning the next one. When would I need a bridging loan? You might consider bridging finance if: You’ve found your next home but haven’t yet sold your current one. You want to avoid renting or moving twice between sales. You want more time to prepare your home for market to get the best sale price. You're building a new home while still living in your existing one. How does it work? Peak Debt: The lender combines your current mortgage, the cost of the new property (including stamp duty and legal fees), and any interest (if it’s being capitalised). This total is known as your Peak Debt. Interest Only: During the bridging period, you’ll typically pay interest only — or the interest may be capitalised (meaning it’s added to your loan rather than paid upfront). Sell Your Property: Once you sell your existing home, the sale proceeds are used to reduce your Peak Debt. End Debt: The remaining balance becomes your End Debt, which then continues as a standard mortgage. An example of a bridging loan. Your current home loan = $200,000 New home = $800,000 Total bridging loan (Peak Debt) = $1,000,000 After selling your home for $600,000, that amount is used to pay down your loan Remaining loan (End Debt) = $400,000 Things to consider. Like any major financial decision, it’s important to understand all the moving parts before you commit. Time pressure: You typically have 6–12 months to sell. If you don’t sell in time, the lender may step in to sell the property and/or charge default interest. This is an extra interest rate that a lender charges when you fail to meet your loan obligations — in this case, not selling your property within the agreed timeframe. Interest costs: If interest is capitalised, it means you're not making repayments during the loan period, so the interest gets added to the loan balance instead of being paid separately. This means your loan grows each month. Making even small repayments can help keep this under control. Equity & serviceability: Lenders will assess how much equity you have and whether you can manage the loan during the bridging period. Loan-to-value ratio: If your End Debt ends up being more than 80% of the new property’s value, you may have to pay Lenders Mortgage Insurance (LMI). Existing loan setup: If your current lender doesn’t offer bridging loans, refinancing may be required — sometimes triggering break fees if your existing loan is fixed. This means you may have to pay a penalty if you end a fixed-rate home loan early (before the agreed term is up). Is a bridging loan right for you? That’s the big question. Bridging finance can offer flexibility and peace of mind, helping you move forward with confidence rather than being held back by uncertain sale timing. But it’s not without risk or cost — so it’s vital to understand the structure, timeframe, and repayment expectations. If you’re considering your next property move and want tailored advice on whether bridging finance suits your situation, talk to the team at Ascent Property Co. or Ascent Accountants. We can also put you in touch with finance brokers to discuss what is best for you.
May 12, 2025
That work perk might be costing you more than you think… Fringe Benefits Tax (FBT) is charged at a whopping 47% — the same as the top personal tax rate. That means lower salary or fewer benefits. So, while salary packaging can save tax, in many cases it ends up costing you more.
May 12, 2025
If you’re expecting a higher income this financial year, now is the time to act. We’ve put together 9 Smart Tax Planning Tips that could save you thousands — but they only work before 30 June.
More Posts