The Productivity Mega-Deduction previewed ahead of Thursday’s budget would let businesses immediately write off eligible capital purchases instead of depreciating them over time, a change that sounds technical but alters investment decisions in a direct way. Consider a firm buying a machine for 100,000 dollars. Under depreciation, the tax relief arrives gradually, as the machine’s value is spread over its useful life. Under immediate write off, the full relief arrives in the year of purchase, which is worth more in present value terms and which improves cash flow at the moment the firm spends the money.
That timing effect is why governments use immediate write offs to encourage investment. A firm that is deciding whether to buy now or wait faces a lower effective cost if it buys now, because the tax saving arrives sooner. The policy is therefore most powerful for firms with taxable income to offset, and for purchases that can be brought forward. It is less powerful for loss making firms, which may have no tax to offset in the purchase year, unless the deduction can be carried forward, a detail Thursday’s budget must clarify.
The scale and the questions
The deduction is worth about 36 billion dollars over five years, according to the budget preview, a large commitment that will be judged on whether it actually increases investment or merely subsidises purchases that would have happened anyway. Economists call that second risk deadweight: tax relief for activity that needed no incentive. The government will argue that faster write offs raise productivity by encouraging newer, more efficient equipment. Critics will ask for evidence that the purchases are additional, and for the list of eligible items, which determines whether the policy helps manufacturers, technology firms, farmers or all three.
The budget preview published on 2 November frames the deduction as the centrepiece of a shift to private investment led growth, alongside simpler tax rules for small and medium firms. That framing puts the deduction in a broader story: a government that wants private capital to drive productivity, rather than public spending alone. The story will only hold if small firms, which often lack tax advice, can actually use the deduction without complex compliance.
What firms should check on Thursday
Check the eligible asset list, the treatment of loss making firms, and any cap or phase out. Check whether the deduction applies to used equipment or only to new purchases, and whether it interacts with provincial tax rules. Those details, not the headline 36 billion figure, will determine whether a given firm buys sooner, buys more, or simply claims relief for a purchase it had already planned.
