https://www.mckinsey.com/~/media/McKinsey/Industries/Financial%20Services/Our%20Insights/A%20mixed%202015%20for%20the%20global%20payments%20industry/Global-Paym

https://www.mckinsey.com/~/media/McKinsey/Industries/Financial%20Services/Our%20Insights/A%20mixed%202015%20for%20the%20global%20payments%20industry/Global-Payments-2016.ashx https://www.mckinsey.com/~/media/McKinsey/Industries/Financi... From what I can tell in the report 16% is account liquidity. The rest is actually transfers and maintenance