Transferring an ISA is straightforward, but doing it incorrectly can cost you tax-free benefits. This guide explains exactly how to transfer your ISA without losing a penny of your tax-free allowance.
Why Transfer Your ISA?
The most common reason is to earn a better interest rate. Many ISA providers offer competitive rates to attract new customers, then lower them after the first year. Transferring lets you chase the best rates without losing your tax-free status.
Common Reasons to Transfer
| Reason | Benefit |
|---|---|
| Better interest rate | Earn more on your savings |
| Switch to Stocks & Shares | Potential for higher returns |
| Switch to Cash ISA | Lower risk, guaranteed returns |
| Consolidation | Combine multiple ISAs into one |
| Better platform | Better app, customer service, or features |
The Golden Rule of ISA Transfers
Never withdraw money from an ISA and deposit it into a new one yourself. This destroys the tax-free status of that money. You can only keep tax-free benefits if you use the official ISA transfer process.
Worked example: You have £20,000 in a Cash ISA earning 3%. You want to move it to a new Cash ISA earning 4%. If you withdraw the money and deposit it in the new ISA, you lose the tax-free status on that £20,000. If the new ISA has no remaining allowance, you cannot replace it. You have just lost years of tax-free growth.
Types of ISA Transfers
Cash ISA to Cash ISA
The simplest transfer. You move money from one Cash ISA to another.
Process:
- Open the new Cash ISA
- Complete a transfer form (new provider handles it)
- Money moves within 15-30 days
- Old ISA is closed or has the transferred amount removed
Cash ISA to Stocks & Shares ISA
Moving from a Cash ISA to a Stocks & Shares ISA. You may want to do this if you want higher potential returns and are comfortable with investment risk.
Process:
- Open a Stocks & Shares ISA
- Complete a transfer form
- Money is transferred and invested according to your instructions
- Old ISA is updated
Important: Investments can go down as well as up. Only transfer to a Stocks & Shares ISA if you understand the risks.
Stocks & Shares ISA to Cash ISA
Moving from a Stocks & Shares ISA to a Cash ISA. Common if you want to reduce risk or need the money soon.
Process:
- Open the new Cash ISA
- Complete a transfer form
- Investments are sold and cash is transferred
- This may take longer (20-30 days) due to selling investments
Tip: If your Stocks & Shares ISA investments are down, consider whether to sell now or wait for recovery. Transferring at a loss locks in that loss.
Stocks & Shares ISA to Stocks & Shares ISA
Moving from one Stocks & Shares ISA to another. Common if you want a better platform, lower fees, or different investment options.
Process:
- Open the new Stocks & Shares ISA
- Complete a transfer form
- Investments may be sold and re-purchased, or transferred in specie (without selling)
- Timeline varies (15-45 days)
In specie transfer: Some providers allow you to transfer investments without selling them. This avoids market risk during the transfer. Not all providers offer this.
In-Year Transfers vs End-of-Year
In-Year Transfers
You can transfer at any time during the tax year. The transfer uses your current year’s ISA allowance.
| Detail | Value |
|---|---|
| When | Any time during the tax year (6 April - 5 April) |
| Allowance impact | Uses current year’s £20,000 allowance |
| Timeline | 15-30 days |
| Can transfer partial amounts | Yes |
Worked example: In January 2027, you transfer £10,000 from one Cash ISA to another. This uses £10,000 of your 2026/27 allowance. You still have £10,000 of your £20,000 allowance remaining.
End-of-Year Transfers
If you transfer after the tax year ends (6 April), the transfer does not use your new year’s allowance.
| Detail | Value |
|---|---|
| When | After 6 April (new tax year) |
| Allowance impact | Uses previous year’s allowance |
| Timeline | 15-30 days |
| Best for | Maximising current year’s allowance |
Tip: If you want to maximise your current year’s allowance, wait until the new tax year to transfer. This way, your full £20,000 is available for new deposits.
The Transfer Process: Step by Step
Step 1: Choose Your New ISA
Research and compare:
- Interest rates (Cash ISA)
- Investment options (Stocks & Shares ISA)
- Fees and charges
- Platform quality
- Minimum deposits
Step 2: Open the New ISA
Open the new ISA with your chosen provider. You will need:
- Proof of identity
- Proof of address
- National Insurance number
- Details of the ISA you want to transfer
Step 3: Complete the Transfer Form
The new provider will give you a transfer form. Fill in:
- Your details
- Details of the old ISA (provider name, account number)
- Amount to transfer (full or partial)
- Authorisation for the new provider to contact your old provider
Step 4: Authorise the Transfer
Sign the form and return it to the new provider. They will contact your old provider and arrange the transfer.
Step 5: Wait for Completion
The transfer should complete within 15-30 days. Cash ISAs are usually faster (15 days). Stocks & Shares ISAs may take longer (20-45 days) if investments need to be sold.
Step 6: Verify the Transfer
Check that:
- The money has arrived in your new ISA
- The old ISA has been updated or closed
- Your tax-free allowance has not been affected
- Any interest or growth has been transferred
Transfer Timeline
| ISA Type | Typical Timeline | What Happens |
|---|---|---|
| Cash ISA to Cash ISA | 15 working days | Cash transferred directly |
| Cash ISA to S&S ISA | 15-20 working days | Cash transferred and invested |
| S&S ISA to Cash ISA | 20-30 working days | Investments sold, cash transferred |
| S&S ISA to S&S ISA | 15-45 working days | Investments sold or transferred in specie |
Worked example: You transfer a Cash ISA to a Stocks & Shares ISA on 1 March. The transfer completes on 25 March (18 working days). Your money is then invested on 26 March. You have missed 25 days of potential investment growth, but the process is straightforward.
Common Mistakes to Avoid
Withdrawing instead of transferring: This is the biggest mistake. Never withdraw ISA money and re-deposit it. Always use the official transfer process.
Transferring during the tax year without planning: If you transfer in March and have used your allowance, you may not be able to add more until April. Plan your transfers to maximise your allowance.
Not checking the new ISA’s terms: Some ISAs have introductory rates that drop after 12 months. Check the ongoing rate, not just the initial rate.
Transferring to avoid risk at the wrong time: If your Stocks & Shares ISA is down, selling now locks in the loss. Consider waiting for recovery if you do not need the money immediately.
Forgetting about exit fees: Some Stocks & Shares ISAs charge exit fees or transfer-out fees. Check before transferring.
Best ISA Rates (2026)
Cash ISA Rates
| Provider | Rate | Type | Access |
|---|---|---|---|
| Moneybox | 4.0% | Easy Access | Instant |
| Shawbrook | 4.2% | Fixed (1 Year) | Locked |
| Close Brothers | 4.3% | Fixed (2 Year) | Locked |
| Cynergy Bank | 3.9% | Easy Access | Instant |
| OakNorth | 4.1% | Notice (90 days) | 90-day notice |
Stocks & Shares ISA Rates
| Provider | Annual Fee | Fund Range | Best For |
|---|---|---|---|
| Vanguard | 0.15% | 80+ funds | Low-cost investing |
| Hargreaves Lansdown | 0.45% | 2,500+ funds | Wide range |
| AJ Bell | 0.25% | 2,000+ funds | Balanced option |
| Freetrade | £3/month | 6,000+ stocks | DIY investing |
Tax-Free Allowance Rules
| Rule | Detail |
|---|---|
| Annual allowance | £20,000 (2026/27) |
| ISA types | Cash, Stocks & Shares, Innovative Finance, Lifetime |
| Can hold multiple ISAs | Yes, but only one of each type per year |
| Transfer between types | Allowed (e.g., Cash to S&S) |
| Transfer within same type | Allowed (e.g., Cash ISA to Cash ISA) |
| Withdrawal and re-deposit | Allowed within same tax year (counts as new deposit) |
Worked example: You have a Cash ISA with £15,000 and a Stocks & Shares ISA with £10,000. You transfer £5,000 from the Cash ISA to the Stocks & Shares ISA. Your total ISA holdings are now £20,000. You have used your full £20,000 allowance for the year.
Partial vs Full Transfers
Full Transfer
You transfer the entire balance of your ISA to the new provider. The old ISA is closed.
Best for:
- You want to consolidate all your ISAs
- The new provider offers significantly better rates
- You are unhappy with the old provider
Partial Transfer
You transfer only part of your ISA balance. The old ISA remains open.
Best for:
- You want to keep some money in the old ISA
- You are transferring a specific amount to meet new ISA requirements
- You want to spread your money across providers
Worked example: You have £30,000 in a Cash ISA earning 3%. You transfer £10,000 to a new Cash ISA earning 4%. You keep £20,000 in the old ISA. You earn better interest on the £10,000 while maintaining flexibility with the old account.
After the Transfer
Within the first week, confirm the money has arrived and the balance matches. In month one, verify your ISA allowance has not been affected. Set a reminder to review the new ISA in 12 months.
The Bottom Line
Transferring an ISA is simple and risk-free if you use the official process. Never withdraw money yourself — always let the new provider handle the transfer. Check rates regularly and transfer when you find a better deal. The process takes 15-30 days and preserves your full tax-free benefits.