TL;DR
UK ISAs can be transferred between providers without using new allowance, provided the transfer is initiated correctly through the new provider. This guide covers the rules for current-year vs prior-year, cross-type transfers, and the Lifetime ISA exception.
Key facts
- ISA transfers initiated through the new provider, not by withdrawing and redepositing.
- Current-year contributions normally transferred in full only.
- Prior-year contributions: partial transfers permitted.
- Cash ISA to Cash ISA, S&S to S&S, and cross-type transfers permitted.
- Transfer completion typically 15 working days for Cash, up to 30 days for S&S.
- Lifetime ISA can only transfer to another LISA.
- Junior ISA can transfer between providers but not to adult ISA except at 18.
- Provider transfer forms reference the source ISA's tax year contributions.
An ISA transfer moves the balance between providers while preserving the tax-free wrapper. The procedure is initiated by the new provider; withdrawing the balance and redepositing at a different provider would lose the tax-free status because the redeposit counts as a fresh contribution against current-year allowance.
This guide covers the transfer rules, the differences between current-year and prior-year balances, the cross-type transfer mechanics, and the specific exceptions for Lifetime and Junior ISAs.
How the transfer process works
The saver opens an ISA with the new provider (or uses an existing one). The new provider's ISA transfer form is completed specifying the source ISA's provider, account number, and amount or 'full balance'. The new provider sends the request to the source provider via the ISA transfer infrastructure.
The source provider releases the funds and closes the source account (for full transfers) or reduces the balance (for partial). The funds arrive at the new provider; the new provider credits the ISA and confirms the transfer to the saver. The full process typically takes 15 working days for Cash ISA to Cash ISA transfers.
Stocks and Shares ISA transfers can take 20 to 30 days because the underlying investments must either be transferred in-specie (moved without selling, if both providers support the same fund or share) or sold to cash and transferred. In-specie transfer preserves market exposure but may not be available for all investments; cash transfers create a brief out-of-market period.
Edge case: where the source ISA holds current-year contributions, the source provider may require the full current-year amount to be transferred or none. The reason is administrative: an ISA contribution year is tracked at the original provider, and partial transfers complicate the year-end declaration. Prior-year balances can be partially transferred.
Current year vs prior year
Current-year contributions are those made within the tax year of the transfer. Prior-year contributions are from any previous tax year. The distinction matters because current-year contributions are tracked specifically for the GBP 20,000 allowance reporting; HMRC's ISA framework requires accurate year-of-contribution tracking.
Current-year contributions can normally be transferred only in full. A saver who has contributed GBP 8,000 to a Cash ISA in the current year can transfer the full GBP 8,000 to a new provider; they cannot transfer GBP 4,000 and leave GBP 4,000 at the original provider. This rule prevents fragmentation of year-of-contribution tracking.
Prior-year contributions can be partially transferred. A saver with GBP 50,000 of prior-year balance built up over multiple years can transfer GBP 20,000 to a new provider and leave GBP 30,000 at the original. Multiple partial transfers across different providers are permitted.
Worked example: a saver has GBP 35,000 in a Cash ISA, of which GBP 10,000 was contributed in the current year and GBP 25,000 in prior years. They want to move to a higher-rate provider. The transfer can be the full GBP 35,000 (current and prior together), the full current GBP 10,000 plus some of the prior GBP 25,000, or just some or all of the prior GBP 25,000 - but not partial current-year alone.
Cross-type transfers
Cash ISA to Stocks and Shares ISA, and Stocks and Shares ISA to Cash ISA, are permitted. The transfer moves the balance and the tax-free status, but the underlying nature of the holdings changes - a Cash ISA balance moving to Stocks and Shares becomes available to invest; a Stocks and Shares ISA balance moving to Cash typically involves selling the investments first.
Innovative Finance ISA to Cash or S&S is permitted but typically requires the underlying peer-to-peer loans to be sold or mature first. Many IFISA providers have secondary loan markets where existing loans can be sold to other investors; the cash proceeds can then transfer to the new ISA type.
Lifetime ISA transfer is more restricted. LISA can transfer to another LISA at a different provider; LISA cannot transfer to other ISA types without withdrawal penalty (the 25% penalty applies, equivalent to a non-qualifying withdrawal). Once funds are in a LISA, they typically stay LISA until first-home use or age 60.
Worked example: a saver wants to move a GBP 30,000 prior-year Cash ISA balance into a Stocks and Shares ISA for long-term growth. The S&S ISA provider's transfer form requests the full balance from the Cash ISA. After transfer the saver invests the cash in chosen funds. Future returns are tax-free under the S&S ISA wrapper.
Lifetime ISA transfer rules
LISA can be transferred to another LISA provider. The transfer follows the standard ISA transfer process: the saver opens a LISA at the new provider, completes the LISA transfer form, and the new provider initiates the transfer. The 25% bonus already credited transfers with the balance.
LISA cannot transfer to a Cash ISA or Stocks and Shares ISA without triggering the 25% withdrawal penalty. The funds would need to be 'withdrawn' from the LISA (paying the penalty) and redeposited as a fresh contribution to another ISA type, against current-year allowance. The total effective cost (penalty plus loss of LISA bonus) usually makes this unattractive.
Transfers between Cash LISA and Stocks and Shares LISA at the same provider (or different providers) are permitted without penalty. The funds remain within the LISA framework; only the underlying account variant changes.
Practical action: saving in a LISA should be done with confidence that the funds will be used for the LISA-qualifying purposes (first home or retirement). The penalty on early withdrawal is the LISA's main constraint, and transfer rules do not provide a route around it.
Junior ISA transfer rules
Junior ISA can transfer between providers without affecting the child's annual GBP 9,000 allowance. The transfer follows the standard ISA process, initiated by the new provider. Cash Junior ISA can transfer to Stocks and Shares Junior ISA and vice versa.
Junior ISA cannot transfer to an adult ISA until the child turns 18, at which point the JISA automatically converts to an adult ISA (and continues to be held in the same provider's adult ISA framework or transferred to a new adult ISA provider through the standard process).
Child Trust Fund balances for children born 2002 to 2011 can transfer to Junior ISA. The transfer form is completed by the parent or guardian (or by the child if aged 16+). The CTF balance moves to the JISA; the underlying tax-free status is preserved.
Edge case: an inherited ISA from a deceased spouse can be transferred to the surviving spouse as 'Additional Permitted Subscriptions' (APS) outside the normal annual allowance. The APS is equal to the deceased's ISA balance at date of death and must be made within three years of death (or 180 days from the estate finishing administration, whichever is later). APS preserves ISA tax shelter on the inherited amount.
Inherited ISAs and Additional Permitted Subscriptions
When an ISA holder dies, the surviving spouse or civil partner can claim an Additional Permitted Subscription (APS) equal to the deceased's ISA balance at date of death. The APS is on top of the survivor's annual GBP 20,000 allowance and preserves the tax-free wrapper on the inherited amount under section 700 ITTOIA 2005.
The APS must be claimed within three years of death or 180 days from the estate administration ending, whichever is later. The survivor opens an APS-eligible ISA at their chosen provider (which can be the deceased's existing provider or a different one) and transfers in the inherited amount against the APS.
The transfer can be in-specie (investments transfer without sale, preserving market exposure) or in cash. In-specie transfers work where both providers offer the same investments. Cash transfers create a brief out-of-market period for invested ISAs.
Without APS, an inherited ISA balance loses tax-free status entirely and becomes a regular estate asset. APS preserves the wrapper for the survivor and is especially valuable for couples who have built up substantial ISA balances over many years.
Disclaimer
This article provides general information based on rules and figures published by UK government and regulator sources as of May 2026. It is not personal financial, legal, immigration or tax advice. Rules, fees and figures change and individual circumstances vary. Readers should check primary sources or consult a qualified, regulated adviser before acting on any information here.
Frequently asked questions
How long does an ISA transfer take?
Typically 15 working days for Cash ISA to Cash ISA transfers, 20 to 30 days for Stocks and Shares ISA transfers. Cross-type transfers (Cash to S&S, S&S to Cash) typically take 20 to 30 days due to the need to sell or transfer underlying investments. The transfer is initiated by the new provider through the ISA transfer infrastructure; the saver completes the new provider's transfer form to start the process.
Can I move only part of my ISA to a new provider?
Yes for prior-year contributions. Current-year contributions normally must be transferred in full or not at all - the rule prevents fragmentation of year-of-contribution tracking at HMRC. A saver with GBP 35,000 ISA balance (GBP 10,000 current year, GBP 25,000 prior years) can transfer the full balance, the current GBP 10,000 plus some of the prior GBP 25,000, or just some or all of the prior GBP 25,000 - but not part of current alone.
Can I transfer a Cash ISA to a Stocks and Shares ISA?
Yes. Cross-type transfers between Cash ISA and Stocks and Shares ISA (in either direction) are permitted. The balance moves to the new ISA type with tax-free status preserved. A Cash ISA balance moving to S&S becomes available to invest; an S&S ISA balance moving to Cash typically involves selling the investments first, with the cash transferring. The process takes 20 to 30 days through the new provider's transfer form.
What about transferring a Lifetime ISA?
LISA to LISA at a different provider is permitted through the standard ISA transfer process, preserving the bonus paid to date and the LISA framework. LISA to Cash ISA or S&S ISA is not directly permitted without the 25% withdrawal penalty applying, since the funds leave the LISA framework. Transfers between Cash LISA and Stocks and Shares LISA variants at the same or different provider are permitted within the LISA framework.
Should I withdraw my ISA and reopen at a new provider?
No. Withdrawing and redepositing loses the tax-free status because the redeposit counts as a fresh contribution against current-year allowance. Where the prior-year balance is larger than the GBP 20,000 annual allowance, the saver loses the tax-free wrapper on any amount above GBP 20,000. The correct procedure is to initiate a formal ISA transfer through the new provider, which moves the balance without affecting current-year allowance use.