United Utilities has urged customers to reach out for help if they are struggling.
The water company warned that the average water bill in the North West will now be £443 - a 6.4% increase compared to last year.
In an email sent to customers, United Utilities said: "As your water and wastewater provider, we understand the important role we play in your daily life and we know you want value for money for the services we provide. It’s been another challenging year, not least due to the rising cost of living and significant increases in household bills and that’s why we’re keeping our increases at an absolute minimum this year."