About Â£66 billion was poured in by the state to keep the two banks afloat at the height of the financial crisis, but the government is yet to receive any return on the bailout funding, reports Bloomberg.
Despite banks in the US, Switzerland and France paying back their state funding, the same thing is yet to be achieved in Britain.
The government wants to sell its stakes in RBS and Lloyds but the share price is remaining below what was paid for them.
Conservative MP John Redwood criticized the former Labour government for buying shares in the banks instead of just lending them money.
"If the government succeeds in getting all the taxpayers' money back with proper reward, then that's a good achievement. But it's not guaranteed," he said.
Last month, the Basel Committee on Banking Supervision recommended that bank bond investors should foot some of the cost for future bailouts of financial institutions.
By Tony Aynsley