Banks are quickly approaching their "automation tipping point," and they could soon reduce headcount by as much as 30%.

That's according to a new Citi Global Perspectives & Solutions (GPS) report on how financial technology is disrupting banks.

"Banks' Uber moment will mean a disintermediation of bank branches rather than the banks themselves," the report said.

"Specifically, it will mean the shift to mobile distribution being the main channel of interaction between customers and the bank," the report reads.

That means that there will be less need for bank branches, and the people who work inside them.

"We believe that there could be another ~30% reduction in staff during 2015-2025," the report said (emphasis added).