Sharing an account is a big step, so it could be a good idea to test the water before you go all the way and share everything.
Try opening a joint account with no overdraft facility and both contribute a small amount each month.
Use the money to share the responsibility for one or two household bills to see how you get on.
After a few months, sit down and discuss it to see if it’s working well. If it is, you can increase your contributions and start sharing more of the responsibility.
If you’ve got a lot of money in savings, you might want to open a joint savings account where you’ll both need to agree before any money can be taken out.
This is a good safeguard against one person dipping into the savings without discussing it with the other first.