The headline from Inland Revenue's report on tax and the economic income of the wealthy is that the median effective tax rate of the 311 families surveyed was 8.9%, but as you'd expect there's a wealth of detail in the 155-page report.
Inland Revenue’s conclusion is backed up by Treasury’s two Analytical Notes supporting its working paper Estimating the Distribution of Wealth in New Zealand. This used slightly different methodology to Inland Revenue and dates from 2018 as it was based on the Household Economic Survey carried out in that year.
Last week’s Sapere report was less conclusive on the matter. But all three major papers point to a significant difference in the effective tax rate between those on average earnings and the wealthy. Untaxed income mostly in the form of untaxed capital gains is the prime explanation for that difference. That should not be surprising because it is a longstanding feature of our tax system and similar issues exist in other tax systems.
(Incidentally, both Inland Revenue and Treasury referenced the Sapere report, so I suspect there were a few last-minute edits last week).
Taken together the three reports will however re-ignite the debate around whether New Zealand should adopt a capital gains tax.
There is an enormous amount to process across the four Inland Revenue and Treasury papers so here are a few stand out points for me beyond the headline.
Inland Revenue estimates that just 17% of the economic income of the survey group across the period 1 April 2015 to 31st March 2021 was from either personal taxable income or taxable trustee income as shown in the following table.
Treasury developed nine(!) effective average tax rate methodologies the most comprehensive of which included personal income tax, ACC levies, portfolio investment entity tax, local government rates on both the principal residence and any secondary homes plus GST. Notably the Sapere report didn’t include GST and also didn’t factor in local government rates.
350 individuals were sent information notices of which 325 or 93% responded. Inland Revenue told me and other analysts Wednesday morning it was “very happy” with this level of compliance. Apparently, it’s well above the 75% response typically seen for similar surveys.
The median total net worth was estimated to be $60.3 million in 2015, $86.4 million in 2018 and $106.1 million in 2021. The proportion of families worth more than $250 million more than doubled from 36, or 12%, in 2015 to 77, or 25%, in 2021.
Interestingly, Inland Revenue asked about significant gifts and inheritances (defined as more than $25,000) for each decade since 1970. The total reported was $411 million, nearly 75% of which was received after 2010. In the decade 2010-2020, 49 inheritances or gifts were disclosed, 11 of which were for amounts exceeding $5 million.
Measured by family, the average inheritance reported was $6.2 million, although the median value was $1.3 million (or an average Auckland property) so a relatively small number of quite large inheritances have skewed the data. Overall Inland Revenue estimated the total amount of inheritance reported for the 2015-2021 period reviewed represented 4.2% of the economic income over the period.
I am a little surprised by these inheritance details, they are lower than I would have expected. That might be explained by the fact that the median age of respondents is 68 with the mean age being 67. Given typical demographics it might therefore be another decade or more before significant wealth starts being distributed by inheritances.
The Inland Revenue project didn’t take into account any effect of the increase in the top personal income tax rate to 39% from 1st April 2021. On the median income of $268,000 that would have increased the average effective tax rate on taxable income to around 31.6%. On the other hand, because capital gains remain largely untaxed that would also probably have increased the gap between effective tax rates on economic income and taxable income.
In practical terms the Government, Inland Revenue and Treasury would almost certainly want to obtain clearer data about unrealised capital gains on a more frequent basis so that this effect can be better measured and tracked. On the other hand, as the conclusion to the Sapere report notes, there are considerable compliance costs for both Government and those surveyed of involved in obtaining and providing the information required to develop this more detailed understanding. Nevertheless, I expect we will see increased data collection as part of tax returns and perhaps better funding of the Household Economic Survey in the future.
Although the debate about capital gains tax will start up again, I agree with other analysts and political commentators that it won’t be part of an election campaign. On the other hand, we could see the trust tax rate rise to 39%, from 33%, in alignment with the top individual tax rate. This was something Inland Revenue recommended back in 2020 prior to increase to 39%. Other jurisdictions such as Australia, the United Kingdom and the United States align trust and individual rates.
Aside from that, based on these reports we can expect the fairness of the tax system to be a matter of furious debate between now and the election.
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