With more than 50,000 staff working from home, NatWest Group has seen a 25% reduction in its electricity use in buildings, and business travel emissions have dropped by 2000 tonnes of carbon a month.
The bank launched a carbon calculator earlier this year, offering tips on how employees can cut their carbon emissions relating to things like commuting.
But, with the vast majority of staff set to continue working from home until at least the end of September, the bank has built a new calculator that gives advice on changing how they use and charge their electric devices, switching to LED lightbulbs, and considering home insulation.