This revision short looks at some Micro & Macro Effects of a UK Wealth Tax.

Micro effects

💸 Incentives to Save and Invest: A wealth tax (e.g. 2% annually) reduces the return on saving, which may discourage high-wealth individuals from saving or investing. This is an example of the substitution effect—people shift from saving to consumption or seek ways to avoid the tax.

🏠 Behavioural Responses & Tax Avoidance: Wealth taxes may lead to asset sheltering (e.g. moving assets offshore, or into non-taxed forms like art). This is a form of tax avoidance, which can reduce the effectiveness of the policy and create market distortions.

📉 Impact on Asset Prices: If wealth holders sell off assets to pay the tax, this could increase supply and reduce demand for high-value assets like property or shares. This may cause prices to fall, leading to redistributive effects in the market and affecting capital allocation.

Macro Effects

🏛️ Government Revenue & Redistribution: A wealth tax could raise significant new revenue—estimated at £325bn since the 1990s. This could be used to fund public services or reduce income tax, addressing income and wealth inequality and improving equity in the economy.

📉 Impact on Economic Growth: A fall in saving and investment due to lower returns on capital could reduce the UK’s capital stock, leading to lower productive potential and long-run aggregate supply (LRAS)—a possible efficiency loss.

⚖️ Reducing Inequality: Since the UK’s richest 50 families now hold more wealth than half the population, a wealth tax could improve income distribution (equity). This could also lead to higher marginal utility of income across society, potentially increasing overall welfare.