Less than a quarter of Nationwide's customers will get the free £100 announced by the building society last week.
The financial institution shared details of its Nationwide Fairer Share, a new reward for its members "with the deepest relationships". A £340 million pot will be distributed to eligible members holding a qualifying current account plus either a qualifying savings or mortgage product.
It comes after the society recorded its best ever financial results and pre-tax profits of £2.2 billion for the last tax year. However some 12 million customers do not meet the criteria and will therefore not be eligible for the bonus.