Long-term capital gains taxes are lower than income taxes for a number of sound financial reasons. Who earns them really does not play into it.
While the double taxation argument seems to be popular, it is relatively weak. Some of the important reasons that are often overlooked:
- Long-term capital gains are not indexed for inflation. For investments held multiple years, this compounds into a very substantial loss that cannot be deducted from the nominal paper gain. You can pay significant capital taxes for a real loss. For short-term investments and income, this loss is nominal and can easily be accounted for in other ways. The lower tax rate on long-term capital returns is a simple way to approximately account for that loss without complicated math.
- Long-term capital taxes are not efficient relative to other taxes. Taxes adversely impact the economy from which tax revenue is derived, so preference is given to taxes that have the least negative impact for every dollar collected. In this regard, capital taxes are among the least efficient of the common taxes. By comparison, both income and consumption taxes do much less damage to economic growth for the amount of revenue generated. From the standpoint of maximizing tax revenue, taxing long-term capital investments is not a good way of going about it.
In short, long-term capital gains are taxed at a lower rate because (1) you can't deduct the substantial inflation losses which make long-term investments otherwise unattractive and (2) even if you could, it is a lousy way for governments to generate tax revenue over the long term relative to other tax sources. While they are associated with high earners, that is mostly incidental. Governments generally have a vested interest in balancing growing the tax base and maximizing revenue, arbitrary notions of fairness aside.
This is fine in theory, but the data doesn't seem to back up the idea that capital gains tax has to be extremely low for substantial investment to occur. At least, according to US historical capital gains tax rates.
While the double taxation argument seems to be popular, it is relatively weak. Some of the important reasons that are often overlooked:
- Long-term capital gains are not indexed for inflation. For investments held multiple years, this compounds into a very substantial loss that cannot be deducted from the nominal paper gain. You can pay significant capital taxes for a real loss. For short-term investments and income, this loss is nominal and can easily be accounted for in other ways. The lower tax rate on long-term capital returns is a simple way to approximately account for that loss without complicated math.
- Long-term capital taxes are not efficient relative to other taxes. Taxes adversely impact the economy from which tax revenue is derived, so preference is given to taxes that have the least negative impact for every dollar collected. In this regard, capital taxes are among the least efficient of the common taxes. By comparison, both income and consumption taxes do much less damage to economic growth for the amount of revenue generated. From the standpoint of maximizing tax revenue, taxing long-term capital investments is not a good way of going about it.
In short, long-term capital gains are taxed at a lower rate because (1) you can't deduct the substantial inflation losses which make long-term investments otherwise unattractive and (2) even if you could, it is a lousy way for governments to generate tax revenue over the long term relative to other tax sources. While they are associated with high earners, that is mostly incidental. Governments generally have a vested interest in balancing growing the tax base and maximizing revenue, arbitrary notions of fairness aside.