The scene
The scene
Felix saw the EOFY ads everywhere in June. "Buy now, claim it on tax." His accountant had mentioned that work-related purchases could be deducted. The reasoning felt sensible. If he was going to buy something for work eventually, doing it before 30 June meant a bigger tax refund this year.
He bought a new laptop ($2,400), a monitor ($700), a desk chair ($600) and a software subscription paid annually upfront ($300). Total: $4,000. All in the last two weeks of June.
In October, his tax return came back. The refund for those purchases worked out to roughly $1,400, depending on his marginal rate and how the items were classified.
He had spent $4,000 to receive $1,400 back. Net: minus $2,600.
The laptop and the monitor he probably needed at some point. The chair was nice but not urgent. The software subscription he could have started in any month. None of the purchases were unjustified individually. What was unjustified was the timing, and the framing of the deduction as if it were a discount.
A deduction is not a discount. It is a refund of a portion of money you already chose to spend. If you would not have spent the money, the deduction does not appear. If you would have spent the money anyway, the deduction is real. The decision is whether the purchase makes sense without the deduction, not because of it.
What your brain just did
What your brain just did
Our minds treat future refunds as if they were immediate discounts, especially when a deadline is involved. Felix is not naïve. His brain compressed the timeline (spend now, refund months later) into a single mental transaction, the way all our brains do when a deadline forces compression. This behaviour has a name: Hyperbolic Discounting.
What to do instead, in one move
What to do instead, in one move
The skill is one question before any end-of-financial-year purchase. Would I buy this in a quiet month, at the same price, with no deduction available? If yes, the deduction is a bonus, buy it. If no, the deduction is paying you to spend money you did not need to spend. The deduction is real. The total cost is realer.
TL;DR
- Situation: End of financial year approaches and you spend on work-related purchases to "claim them on tax", under time pressure from the deadline.
- What your mind does: It treats the future refund as if it were an immediate discount, even though you are spending the full amount today and only receiving a fraction back later (this is called Hyperbolic Discounting, see below).
- Consequence: You end up spending money on items you did not need urgently, recovering only a fraction through the deduction, and feeling like you saved tax.
- What to do: Apply the quiet-month test. Would you buy this purchase in a quiet month, at the same price, with no deduction at stake? If no, do not buy it under deadline pressure either.
What to do
- Before any deadline-driven tax purchase, apply the quiet-month test. Would you buy this in a low-pressure month at the same price with no deduction? If the answer is no or unclear, do not buy it now.
- Make a list during the year of work-related purchases you would have made regardless. Time those purchases before end of financial year where it makes sense. The list is honest because it was made when no deadline applied.
- For legitimate work expenses you need now, the deduction is a real benefit. For purchases manufactured to chase the deduction, the math goes the other way.
- For complex tax situations involving large purchases, business structures, or investment property, consult a registered tax agent before assuming a deduction applies the way you think it does.
What not to do
- Do not treat tax deductions as discounts. A 30 percent deduction returns 30 cents on the dollar, not 100. You are still spending the other 70 cents on something you may not need.
- Do not let end-of-financial-year deadlines compress decisions that should not be compressed. The deadline is real for the tax year. The need for the purchase is independent of the deadline.
- Do not assume that "I can claim it" means the purchase is justified. Claiming it means part of the cost comes back. The cost is still mostly yours.
A deduction is not a discount. It is a portion of money you already spent, returned to you, in exchange for spending it in the first place.
Want to understand why this happens?
Hyperbolic Discounting is the brain's habit of overweighting present rewards and discounting future ones, especially under time pressure.
For deadline-driven spending, the bias works in a specific way. The deduction is months away (the refund arrives after the tax return is lodged and processed). The purchase is immediate. The brain treats both as if they were happening now, collapsing the timeline. The deduction feels like an instant discount because the brain is not accurately modelling the delay.
The deadline pressure makes the bias stronger. "If I do not buy this before the deadline, I lose the chance." The pressure compresses the decision and removes the natural pause that would let the brain calculate the real math.
It is not you. It is how every human brain handles time pressure combined with delayed rewards.
What the research found
Ariely's work on time-pressured decisions documented that consumers regularly accept worse trades when a deadline is involved. The Predictably Irrational research showed that "limited time" framing shifts purchasing decisions toward items consumers would not have chosen without the deadline, even when the deadline is artificial.
For tax-related spending specifically, research by behavioural economists working with tax agencies has documented that end-of-financial-year spending spikes consistently in the final weeks of the tax year across multiple jurisdictions. The spike is not driven by genuine business needs that happen to peak at year-end. It is driven by the deadline itself.
The fix is the quiet-month test. By imagining the same purchase in a low-pressure month, the brain is forced to evaluate the purchase on its own merits. If it still makes sense without the deadline, the timing is a bonus. If it does not, the deadline does not change the math.
"Time pressure changes the decision. The same purchase that we would refuse with three months to think feels obvious with three days." Dan Ariely (paraphrased from Predictably Irrational, 2008)
This is called Hyperbolic Discounting. Dan Ariely, Predictably Irrational (2008).
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