Your Truck Costs More Than the Write-Off Covers: What Now
Trucks Above the Write-Off Threshold | Switchboard Finance
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Chattel Mortgage · Truck Depreciation · Owner-Drivers
Your Truck Costs More Than the Write-Off Covers: What Now
Buying a truck before 30 June to chase a deduction is the wrong frame. Most trucks sit above the write-off threshold, so the deduction runs through the simplified depreciation pool while a chattel mortgage funds the purchase. Here is how the two questions actually fit together.
Quick Answer
Most trucks cost more than the instant asset write-off threshold, so the price is not written off in year one. The truck runs through the simplified depreciation pool, while a chattel mortgage funds the purchase. The deduction and the repayment are two separate questions.
EOFY Is a Planning Window, Not a 30 June Deadline
Chasing a truck purchase before 30 June to lock in a deduction is the wrong frame, and it is worth fixing before you sign anything. The buy-it-or-lose-it cliff that drove a lot of end-of-year truck buying has softened, because the 2026-27 Federal Budget has announced the instant asset write-off becoming permanent for small businesses from 1 July 2026. That measure is announced and not yet law, but the direction of travel is clear: this is becoming a standing feature rather than a date you race.
What I tell owner-drivers at tax time is that the calendar is the smaller part of the decision. The bigger question is structural, because the truck sits above the write-off threshold, which changes how the deduction actually reaches you. Buying the right asset on the right finance matters far more than the day it settles. For the wider picture of how the asset, cashflow and home pieces line up, the Truckie Hub is the place to start.
Why the Instant Write-Off Does Not Cover the Truck
The instant write-off does not cover the truck, because a prime mover or most rigid trucks cost far more than the threshold the write-off applies to. The figure itself is small relative to a truck: the instant asset write-off threshold is $20,000 for small businesses with aggregated turnover under $10M, legislated for assets first used or installed ready for use to 30 June 2026; the 2026-27 Federal Budget (announced 12 May 2026) has announced this threshold becoming permanent from 1 July 2026, announced and not yet law (confirm current status with your accountant). You can read the live limits on the ATO instant asset write-off page, and the permanence announcement sits in the Budget 2026-27 update.
Because the asset is at or above that limit, it must be placed in the simplified depreciation pool instead of being claimed in full up front. That is the heart of it: the instant write-off does not cover the truck, so the deduction is spread, not immediate. Smaller items can behave differently, which is where the works-and-stalls split below matters.
Where the write-off works
- Low-value gear under the threshold, such as a UHF set, straps or a toolkit, can be written off in full in the year it is used
- Each qualifying item is tested on its own cost, not the total spend
- The item meets the installed and ready for use test before 30 June
- Cash-bought gear keeps the claim clean and simple
Where it stalls
- A prime mover or rigid truck sits above the threshold and cannot be written off in one year
- The truck is pushed into the simplified depreciation pool instead
- Expecting the full purchase price as a year-one deduction overstates the benefit
- Timing the purchase to the calendar rather than the cashflow
How the Simplified Depreciation Pool Actually Works
The simplified depreciation pool is how a truck above the threshold reaches you as a deduction, spread over time rather than all at once. You claim a first-year pool deduction, then an ongoing rate each year after, illustrative and confirmed with your accountant, on the declining pool balance. The exact rates are set by the ATO and are best confirmed for your year, but the shape is the same: a larger first-year slice, then a steady tail.
The installed and ready for use test still matters here, because the asset only enters the pool once it is genuinely available for use in the business, not merely ordered or paid for. Low-value gear under the threshold stays outside the pool and can be written off immediately, which is why separating the truck from the small items keeps the claim accurate. If you are weighing how the asset sits against the loan structure, the chattel mortgage small business guide sets out the mechanics, and the instant asset write-off glossary entry covers the threshold test.
What a Chattel Mortgage Lets You Claim
Under a chattel mortgage your business owns the truck from day one, which is what puts the depreciation, the loan interest and the GST credit on your side of the ledger rather than a financier's. Ownership is the mechanism: because the asset sits on your books, the truck runs through the simplified depreciation pool in your name, the interest portion of each repayment is deductible, and the GST included in the purchase price is generally claimable as an input tax credit through your BAS.
The timing of that GST credit is the part owner-drivers most often get wrong. Whether it lands in a single quarter or is spread depends on how you account for GST and how the finance is structured, so it is worth confirming the timing with your accountant before you count on a particular refund rather than assuming one large credit. A lease arrangement reads differently again, because ownership and the depreciation can sit with the financier instead of you, which changes the tax position entirely. None of this is a reason to buy a truck you were not already going to buy, but for the truck you need, the chattel mortgage structure is what keeps all three claims with the business.
Balancing the Deduction Against the Repayment
The deduction and the repayment are two separate questions, and the trap is letting a tax benefit drive a finance decision it should not. A chattel mortgage lets you own the truck, run the depreciation through the pool and claim the interest portion of each repayment, but the loan still has to be serviceable on its own terms. What lenders actually look at first is not the deduction at all; it is the cashflow that services the repayment, the age and type of the asset, and how the business has handled credit before.
So the order I work through with owner-drivers is to balance the deduction against the repayment: size the loan to what the truck earns, then let the tax treatment fall out of that, rather than buying a more expensive truck for a deduction that is spread over years anyway. Structure choices like a balloon payment or the residual value change the monthly number and the end-of-term position, so they belong in the same conversation. If you are also comparing the chattel route against a simple car loan style facility, the chattel mortgage versus car loan comparison is a useful next read, and the broader write-off-becomes-permanent context sits in the EOFY tool buying guide. The chattel mortgage glossary entry is the plain-language version, and the Truckie loan pack pulls the asset and cashflow pieces together.
For most owner-drivers the truck sits above the write-off threshold, so the instant write-off does not cover it and the deduction runs through the simplified depreciation pool over time. Low-value gear under the threshold can still be written off in the year it is used. A chattel mortgage funds the asset, with the interest claimed separately, and the loan has to service on its own merits regardless of the tax treatment.
Key takeaway: Size the finance to what the truck earns first, then let the depreciation pool deduction fall out of that, and confirm the figures with your accountant.Frequently Asked Questions
The instant asset write-off is not simply ending in 2026, though the picture is nuanced. The current threshold is legislated for assets first used or installed ready for use up to 30 June 2026, and the 2026-27 Federal Budget has announced making it permanent from 1 July 2026, a measure that is announced and not yet law. For a truck this often matters less than expected, because most trucks sit above the threshold and run through the instant asset write-off rules into the simplified depreciation pool instead. Confirm the current status with your accountant.
The instant asset write-off does not cover the cost of most trucks, because a prime mover or rigid truck typically costs well above the write-off threshold. Assets at or above the threshold must go into the simplified depreciation pool rather than being written off in full in year one. A chattel mortgage funds the purchase while the deduction is handled separately through the pool.
The simplified depreciation pool is the mechanism small businesses use to depreciate assets that sit above the instant write-off threshold, including most trucks. You claim a first-year pool deduction and then an ongoing rate each year after, illustrative and confirmed with your accountant, rather than the whole cost up front. The ATO sets out how the pool works and how assets enter it.
You can generally claim a chattel mortgage truck on tax where the truck is used to produce business income, with the interest and the depreciation treated as separate deductions. The depreciation runs through the simplified depreciation pool, while the interest portion of each repayment is claimed over the life of the loan. Your accountant confirms what applies to your structure, and our chattel mortgage explainer covers the basics.
Whether a chattel mortgage is better than a lease for truck depreciation depends on who holds the asset on the balance sheet and how you want the deduction to flow. Under a chattel mortgage you own the truck and claim depreciation through the pool, where a lease is structured around the rental payment instead. Our chattel mortgage small business guide walks through the trade-offs so you can take the question to your accountant.
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