Might be of interest to some people:

For electricity bills you can pay by online/internet banking, as well set up a direct debit, go to the electricity shop, at Seven Eleven etc. = quite easy

For water bills though it's always been less convenient. Was fine when in a condo as you pay centrally to the condo. But in your own house where you get your own bill direct it's less convenient. None of the banks I use allow you to pay the bill via their internet banking. Every month we've been paying at the local 7-11 in cash. That's fine until you are out of the country for several weeks so won't get the bill they post and pay by the due date as you're not in country.

Found out that MWA (Metropolitan Water Authority) has a mobile app. There's quite a bit of useful info on there: news, no water areas, branch contacts, report problems, profile account, payment charges and history, water use stats etc

Under water charges there's an option to pay your bill online using this app and a Thai credit card. Just used it and it works fine

Available in Google Play under "MWA on Mobile"

BTW Anyone else pay in ways other than cash? eg direct debit? Promptpay etc