Officials for the group said the study's assumptions about the allocation of returns between taxable income and tax-free capital gains were hypothetical and arbitrary. They also said rental property was modelled differently from other assets when it shouldn't have been.
They confirmed that if the study had treated other assets that also had a capital growth component the same way they treated rental property, then rental property would actually have a higher marginal effective tax rate because of local government rates.
At a meeting with the group, they agreed with the Morgan Wallace conclusion that rental property was not under taxed compared to other assets.
A second and separate issue raised recently was that rental property owners have a tax advantage over first home buyers. This was an opinion by Westpac economist Dominick Stephens, who claimed rental property has tax advantages over home buyers and that this has led to a reduction in the rate of home ownership since the early 1990's.
However, claiming expenses as a deduction against taxable income has always been a tax law that exists for all businesses and investments. If an investment or business makes taxable income, then expenses are taken away from the gross income to work out how much tax is payable on the net taxable income.
Rental property owners can claim expenses as a deduction because they receive rental income to deduct the expenses from. Home buyers do not have an income stream to deduct their expenses from. When buying a home they receive the benefit of accommodation rather than taxable rental income.
The two situations are completely different. Just because a rental provider can claim expenses from their rental income does not make buying a property easier for them compared to a home buyer.
These tax laws have always been in place and therefore had nothing to do with home ownership rates falling since the 1990s. What did change in the early 1990s was the removal of government assistance for first home buyers. This is the more likely reason for a reduction in first home buyers since that time.
Whether the tax working group recommends a capital gains tax or not is up to them. However, Stephens admits that if one was introduced it is unknown if prices would fall or not, and even if they did, it would only be a one off occurrence. His view is backed up by other countries with a capital gain tax that have still had high levels of house price growth.
It is difficult to see why New Zealand would be any different, especially when owner occupied housing would be exempt from such a tax.
Stephens also got it right when he stated that a capital gains tax will increase rental prices, a factor that will make it even harder for tenants to save a home deposit.
* Andrew King is executive officer of the NZ Property Investors Federation.