Introduction
When capital gains tax rises are being proposed in the UK as a short-term
measure to increase revenues, it is important for policymakers to have a full
understanding of the likely effect of such rises on Government revenues.
Capital gains tax rates in the USA have changed considerably up and down in
recent years and decades and provide a rich seam of data with which one can
come to solid conclusions on the revenue effects of such changes.
This policy briefing summarises those revenue effects, considering evidence
from other countries too, and draws conclusions for UK policymakers. The
current policy debate in the UK is being conducted amidst a remarkable
absence of facts. Policymakers need to proceed carefully and ensure they take
an evidence-based approach in order to avoid unforeseen negative
consequences of rushed, ill-informed decision-making.