Nationwide Building Society has won a £50m share of a fund aimed at boosting competition in the business banking sector.
The building society said the award will help boost its launch into business banking.
Joe Garner, chief executive of Nationwide, said: "While the money is a massive boost for our plan, we also aim to match every pound of the £50 million award with our own funding over a five-year plan."
The Co-operative Bank and Investec Bank also won smaller awards of £15m each in the second round of a £775m programme funded by Royal Bank of Scotland to increase competition in business lending.
The fund was launched as a condition of RBS's bailout at the height of the financial crisis.