How much do effective tax rates on capital income vary?
Core argument: CBO estimates the base-case effective tax rate on capital income at 13.8%, with debt-financed corporate investment taxed at -6.4% and equity-financed corporate investment at 36.1%.
The Congressional Budget Office (CBO) analysis reveals significant disparities in effective tax rates on capital income, with a base case rate of 13.8%. Debt-financed corporate investments face a -6.4% rate, while equity-financed investments are taxed at 36.1%. Corporate investment rates are 5.7 percentage points higher than noncorporate, and tenant-occupied housing is taxed 23.3 percentage points more than owner-occupied. Eliminating individual-level capital income taxes and allowing full expensing of new investments could result in a -15.1% effective rate, subsidizing rather than taxing capital returns. This approach would reduce disparities between corporate and noncorporate investments but increase differences between equity and debt financing. Removing interest expense deductions could standardize rates at zero, achieving uniformity across capital income types.



