This note by the Verité Research Sri Lanka Economic Policy Group estimates the additional revenue that can be collected from reinstating in Sri Lanka two methods of efficient tax collection that were discontinued in 2020. That is: the withholding tax (WHT) and the pay-as-you-earn (PAYE) methods of tax collection. Without any change in the current, reduced, tax rates, and a WHT of 10% the additional revenue that can be collected is estimated to be 0.70% of GDP (which is LKR 184.2 billion in 2023).