Depends were you live my water rates without meter are £45.00 a month if i go on to a meter and use 600 ltrs a day or 2,400 litres of water a week Northumbrian Water told me i would be better of with a meter as it would be approx £40.00 a month .
And if i apply for a meter but they cant fit one as i think the development of converted barns were i live is on a shared supply , They will give me a discount anyway .
Meter might be cheaper . Mike