Opening a joint account is often one of the first financial decisions couples or housemates make together, and it's worth understanding exactly what you're signing up for — particularly around debt, before you commit.
What to look for in a joint account
- Fees and interest. Some current accounts charge a monthly fee for extra features; compare against fee-free options if you don't need them.
- Overdraft terms. Check the arranged overdraft limit, the interest rate charged (usually shown as a representative APR), and any daily or monthly charges.
- Budgeting tools. Some accounts offer built-in spending categories, round-up savings, or the ability to create shared "pots" alongside the main balance.
- How easy it is to manage individually. Look at whether both holders get their own card and app access, or whether one person is left managing everything.
- Switching ease. The Current Account Switch Service can move a joint account, including its direct debits, automatically if you later want to change banks.
How liability for an overdraft actually works
This is the part most people get wrong. On a standard joint account, both holders are usually "jointly and severally" liable for any overdraft or debt on the account — meaning the bank can pursue either person for the full amount owed, not just half, regardless of who actually spent the money. If your partner runs up a large overdraft and then can't or won't repay it, the bank can come after you for the entire balance.
This also matters for credit files: a joint account creates a financial "association" between both holders on your credit reports, which can affect how lenders assess you individually in future, even after the joint account closes — you can ask credit reference agencies to note the association has ended once the account is closed and any debt is cleared.
A worked example
Two people open a joint account with a £500 arranged overdraft. One person spends into the full overdraft on their own purchases and later moves out without repaying it. The bank is entitled to pursue either account holder — including the one who never used the overdraft — for the full £500 plus any interest. This is precisely why understanding joint liability before opening the account matters more than almost any other feature.
Alternatives if you'd rather not fully merge finances
| Option | How it works |
|---|---|
| "Bills only" joint account | Both partners keep their own main current account and transfer an agreed amount each month into a joint account used solely for shared bills. |
| Shared expense apps | Apps designed to split and track shared costs without a shared account, settling up via individual bank transfers. |
| Authorised access, not joint ownership | Some banks allow a second person view or limited access to an account without making them a joint account holder liable for its debts. |
Common mistakes
- Assuming you're only liable for "your half" of a joint overdraft — you're not
- Not discussing an overdraft limit or spending expectations before opening the account
- Closing a joint account after a breakup without first agreeing how any remaining balance or debt is split
- Not checking how the joint account might show up on your individual credit file
What to do next
Before opening a joint account, agree in writing (even just in a message thread) what it will and won't be used for, what overdraft limit you're both comfortable with, and how you'd wind it down if your circumstances changed. If full merging feels premature, a bills-only account is a lower-risk way to share costs.