Sky added that so far, Metro has raised over £600m from investors, and as such a successful flotation could put it close to the mooted £1bn valuation of the business.
The move comes despite the Treasury's plans for a new corporation tax surcharge, which will take an additional eight per cent of banks’ profits each year. It applies to banking institutions making more than £25m a year, meaning many of the newer, smaller banks will be hit.
Metro cut its losses to £8.9m in the final quarter of 2014, down from £9.4m in the previous three-month period, as it edges closer towards profitability.
The bank declined to comment.