Unintended consequences
All taxes cause “distortions”, mostly unintended, which need to be mitigated. Furthermore, policies that have conflicting objectives are “incoherent” and typically among the most distorting. This applies to the housing package’s removal of interest deductibility.
Previously, in New Zealand and almost every other country, interest on business loans is treated as a legitimate expense and therefore tax deductible, regardless of the nature of that business.
With that coherent principle now not applying to housing, then, what about other types of business loans the government thinks it should favour or disfavour? No doubt arguments could be made for such policies, but the result is an ad hoc tax system that generates multiple undesirable distortions and perverse incentives.
It could be argued the “new build” aspect of the housing package gets some incentives right by directing rental housing investment toward increasing the housing stock.
But with already existing constraints on new house building — such as planning regulations and availability of suitable land — the policy is likely to have little impact. It will simply shift housing investors from competing with first-time buyers for existing properties to competing with them for new properties.
Over time the rental housing stock becomes a patchwork of homes that do or don’t qualify for tax exemptions. Exploiting these new loopholes and assorted distortions to property prices will likely provide plenty of employment for tax accountants.
Alternative policy instruments
If there are better alternatives, they do not lie in even more ad hoc fiddling with a coherent tax regime.
Instead, like the famous real estate mantra of “location, location, location”, the mantra for New Zealand housing policy should be “supply, supply, supply”. Specifically, supply in Auckland.
Successive governments have aimed policies nationwide when rapid house price inflation is almost exclusively urban and essentially an Auckland phenomenon.
Without policies that reform construction sector regulations and open up more land for urban housing, there is little prospect of Auckland house prices stabilising while current demand-driven trends persist. To make matters worse, the government’s first-home buyer schemes will merely raise demand without incentivising supply.
With too many objectives and the probability of numerous unintended consequences, the government’s housing policies risk being seriously incoherent.