The Invisible Bank: How Kenya's m-Pesa mobile money transfer works

Click a few keys, exchange a few numbers, and it's done. With just a mobile phone and a registration with Safaricom, Kenya's mobile service giant, you can pay for anything in seconds – no cash, no long journeys to towns to reach a bank, and no long lines when you get there. This is m-Pesa, the revolutionary approach to banking which is changing economies across Africa. The service allows customers and businesses to pay for anything without needing cash, a bank account, or even a permanent address.

So how does it work? M-Pesa relies on a network of small shop-front retailers, who register to be m-Pesa agents. Customers come to these retailers and pay them cash in exchange for loading virtual credit onto their phone, known as e-float. E-float can be swapped and transferred between mobile users with a simple text message and a system of codes. The recipient of e-float takes her mobile phone into her nearest retailer when she wants to cash in, and swaps her text message code back for physical money. There are already more m-Pesa agents in Kenya than there are bank branches.