Switching bank accounts while overdrawn: plan the gap

You can often switch current accounts while using an overdraft, but the new bank does not have to give you the same overdraft limit. Solve that funding gap before starting the switch.

The overdraft does not simply travel with the account

The useful way to approach this is to separate the rule from the practical sequence. CASS moves eligible payments and redirects incoming credits, but credit facilities are a separate lending decision by the new bank. That distinction prevents a routine banking task from becoming a last-minute problem.

The receiving bank may run eligibility and credit checks and offer a smaller overdraft, a different rate or no overdraft at all. A switch incentive does not override affordability rules. The dangerous scenario is switching a salary and bills successfully while discovering that the £900 overdraft supporting the old account has not followed you.

Start with a dated baseline. Your existing overdraft does not automatically move to the new bank. Current Account Switch Service guidance says you can switch while overdrawn, but any new overdraft must be separately agreed with the new provider under its lending criteria. Keep a screenshot, statement or provider message for the figures that matter.

Work out the funding gap before you switch

Suppose the old account is £650 overdrawn on a £1,000 limit. The new bank approves only £250. You need a plan for the £400 gap before the old account closes: savings, salary timing, a repayment arrangement or another suitable borrowing solution. Starting the switch first leaves too little room to react.

Treat the numbers in this example as a planning tool, not a promise from a bank. Use the new bank’s overdraft eligibility or quotation process and read the CASS terms for how a debit balance will be handled If the live tariff, app message or branch instruction differs, the live bank information wins.

Worked example: if the old account is £900 overdrawn and the new bank approves only £300, there is a £600 funding gap to solve before the switch. A £175 switching bonus does not repair that gap and should not drive the decision.

Apply “Work out the funding gap before you switch” to Switching bank accounts while overdrawn: plan the gap with one simple record: the current bank rule, your account-specific fact and the next action that follows from them. If the bank later gives a different answer, you can compare like with like instead of starting the investigation again.

Plan the switch around your cash-flow cycle

Get an overdraft decision from the new bank, list the old balance and upcoming bills, choose a switch date after major salary and housing payments where possible, and keep enough cash outside the old overdraft to absorb timing differences. Do not close the old account manually if you are using CASS.

A standard full CASS switch is designed around seven working days, but choose the requested date with your pay cycle in mind and allow for the new lender’s separate credit decision. Build in a margin rather than aiming for the last possible minute; banking cut-offs, fraud checks and document reviews rarely become easier when a deadline is already close.

Use a fixed sequence. ask the new bank for the required overdraft before starting the switch or arrange another lawful way to clear the old balance. CASS says the switch itself needs seven working days, so choose a date that does not collide with salary, rent or a heavy Direct Debit week. After each step, note what changed and what did not.

A switching bonus can hide a borrowing problem

The biggest mistake is comparing only the switching bonus. A £175 incentive can be poor value if the new overdraft costs more, is much smaller or forces an expensive short-term borrowing gap.

If the new bank declines the overdraft, you can still decide whether to switch without one, postpone the switch while reducing the old balance, or look for an account that better fits your needs. Do not repeatedly apply for credit without understanding the likely effect. Where money is already in motion, first establish whether it is pending, completed, reversed or rejected. Those four states require different next steps.

Timing can change the practical outcome. avoid setting up new payment arrangements at the old bank during the final seven working days before the agreed switch date because CASS warns these may not transfer automatically. Save statements and check the new account immediately after the switch. Build a buffer around any bill date, completion, trip or tax-year deadline.

Compare overdraft economics separately

Switching can still be worthwhile if the new account has better service or lower borrowing cost, but evaluate the overdraft as a debt product, not as a feature of the switch.

Write down the old overdrawn balance, new approved limit and expected balance on switch day. If those three numbers do not fit comfortably, change the timing before pressing submit. The goal is not to memorise every bank rule; it is to know which fact you need to verify before acting.

If the normal route fails, move from retrying to evidence. compare overdraft rates, interest-free buffers and fees independently from any incentive. If the old debt remains outside the switch, get a written repayment plan and monitor both accounts until the old balance is genuinely cleared.

For switching bank accounts while overdrawn, cross-check the expected result against the actual result in 'Compare overdraft economics separately'.

Watch the first payment cycle after the move

After the switch, confirm the first salary credit and the first cycle of major Direct Debits. CASS redirects payments, but you should still monitor because a payroll department or merchant can hold outdated details outside the banking system.

If payday is the 28th and rent is taken on the 1st, a switch landing on the 27th can create unnecessary stress. Moving the switch date until after salary and rent have both settled gives you a clearer view of the true overdraft balance and reduces the chance that the transition itself deepens the debt.

Use one closing decision rule. judge the switch by the post-switch monthly budget. The new account should leave you with a manageable overdraft position and reliable bill funding, not simply a new brand and a temporary cash reward. Recheck the live account terms or tariff on the day you act.

Sources and verification

• Current Account Switch Service - How switching works
• MoneyHelper - Overdrafts explained
• Current Account Switch Service - overdraft and switching questions

MyBankAnswers uses official provider and UK regulatory sources wherever practical. Information is general and does not constitute financial advice.