Which are also generally subject to taxes on returns too?
Yes, but the tax still narrows the gap.
Consider this hypothetical:
- Return on bonds 4%
- Return on equities 6%
In that case, the premium for investing in equities is 2%.
But now we add a 25% tax on investment earnings:
- Gross return on bonds 4%; after tax 3%
- Gross return on equities 6%; afer tax 4.5%
The premium for investing in equities is now reduced to 1.5%.
But our tax regime for investment outside of pensions is harsher than most countries - CGT is higher, fund taxes are higher, deemed disposal, we don't have tax advantaged accounts (TFSA, ISA), dividend taxation is one of the highest in the OECD etc.
A common impression, but I don't know how true it really is. It's formed by focussing on the taxes which are especially high in Ireland, while ignoring those which are especially low or are entirely absent, and by focussing on countries that have tax-advantaged investment accounts while ignoring those which don't, etc.
Here's a link to a paper that tries to take a more holistic view of capital taxation in various contries:
https://taxfoundation.org/data/all/global/tax-burden-on-capital-income/
It looks at all the relevant taxes - corporation tax on gains, capital taxes, property tax, transaction taxes and (I suspect) considers not only the fact that e.g. Ireland doesn't have ISAs but also that it does have unusually generous pension fund tax concessions, etc, etc. Based on OECD data it's conclusion is that Ireland is actually at the lower end of the scale when it comes to the taxation of capital income. Obviously, this is an average and the situation of many individual investors may be far removed from that average, so they may face high tax rates on capital income, e.g, because they're not in a position to make use of pension fund tax concessions. But, overall, it doesn't support the view that Irish taxation of investment income is particularly harsh.
When we are talking about asset pricing of globally traded assets like this, the fact that a small number of buyers/sellers (irish taxable investors) are highly taxed isn't going to increase the risk premium.
Sure, but that's not my argument. Even if it's true that Ireland is taxes capital income higher than most countries, most counties do tax capital income. The risk premium that global equity markets offer has to reflect the fact that, globally, investors do pay a material amount of tax on their investment income.