IMF models a 2.1% to 2.7% long-run GDP gain from removing tax penalties on investment
The International Monetary Fund estimates that removing tax-induced increases in the cost of capital could raise long-run GDP by 2.1% to 2.7%.
That is a model result.
The October Fiscal Monitor argues for revenue-neutral reforms inside existing tax systems. It estimates that reducing VAT distortions could produce welfare gains up to 0.8% of GDP in emerging and developing economies.
Stronger work incentives could raise employment rates by about 1.2 percentage points there and 0.8 point in advanced economies.
Administration matters too. Countries at the 67th percentile of operational tax-administration strength collect about 1.7 percentage points of GDP more than countries at the 33rd percentile, the report says.
The report focuses on faster investment-cost recovery, prompt VAT refunds, better-targeted research incentives and lower compliance burdens.
