In the US? This has to vary per country. Here in the UK I think usually you set up a standing order, that is an automatic scheduled bank transfer for a set amo

In the US? This has to vary per country. Here in the UK I think usually you set up a standing order, that is an automatic scheduled bank transfer for a set amount every month. You can do that online and these days the transfer is instant, and it does not require any third party services or fees.