Interest payment of the government has increased to 3.1 per cent of the GDP to Rs 7.31 lakh crore in 2021-22, Minister of State for Finance Pankaj Chaudhary told the Lok Sabha on Monday. Interest paid on public debt during 2014-15 stood at 3.27 lakh crore or 2.6 per cent of the GDP, he said in a written reply. During 2014-15, the total central government liabilities stood at Rs 62.44 lakh crore or 50.1 per cent of GDP.