The Short Answer

Your ISAs do not close, disappear, or lose their tax-free status when you leave the UK. Your existing holdings remain sheltered from UK tax. What you lose is the ability to make new contributions while you are non-UK-resident. That’s it. For most people planning a year or two of travel, this is far less complicated than the internet makes it sound.

What Actually Happens to Your ISA When You Leave

When you become non-UK-resident for tax purposes – which for most long-term travellers happens within a year of leaving, depending on how many days you spend in the UK – you can no longer pay into your ISA. The annual allowance (currently £20,000) is effectively paused for you until you return and re-establish UK tax residency.

Your existing ISA balance continues to grow tax-free throughout. Interest on a cash ISA is not taxed. Gains and dividends inside a stocks and shares ISA are not taxed. The tax wrapper remains intact. You are simply not allowed to top it up.

You should tell your ISA provider that you are becoming non-resident. Most will require this. They won’t close your account, but they need to know so they don’t inadvertently accept contributions that would be invalid. If you make contributions after becoming non-resident – even accidentally – those contributions are void and the money would need to be withdrawn.

One practical note: your ISA provider may ask for updated address details periodically. If you are travelling without a fixed address, this is worth thinking through before you leave. Using a trusted family member’s address as your correspondence address is common practice and generally straightforward to arrange.

Cash ISA vs Stocks and Shares ISA: Does It Make a Difference?

In terms of the rules around non-residency, no. Both types are treated the same way – you keep what you have, you can’t add more.

In practice, there are some differences worth thinking about.

A cash ISA is straightforward. The money sits there, earning whatever rate your provider offers. There’s nothing to manage. The risk is simply that interest rates may move, and you can’t top it up to take advantage of a good rate if one appears while you’re away.

A stocks and shares ISA has more moving parts. The value will fluctuate while you’re travelling, and you won’t be monitoring it day to day. That’s fine if you have a long enough time horizon as markets go up and down, and over several years those movements tend to average out. It becomes more of a consideration if you might need to access the money soon after returning, when you could find yourself selling at an inopportune moment.

The question of which type to hold is really a question about your time horizon and how you feel about short-term volatility. That brings us to what we actually did.

What We Did Before We Left

Before we left the UK in October 2025, we held both a cash ISA and a stocks and shares ISA between us. At that point, we genuinely didn’t know how long we’d be travelling as we had a rough plan of a year, but no fixed return date, and no certainty about what we’d need the money for when we got back.

That uncertainty pushed us toward a more cautious position than we’d normally take. We kept a significant proportion in cash, partly because we wanted to be able to access funds quickly if we came home earlier than expected, and partly because the unknowns felt large enough to justify keeping our options open. In hindsight, the caution was understandable but probably overstated. Once you’re actually travelling and your costs are lower than UK life, the pressure to have liquid savings immediately to hand is less than you imagine.

We left both ISAs in place, told our providers we were leaving the UK, and made no further contributions. That was, it turned out, the right thing to do and simpler than the research beforehand suggested it would be.

How Our Thinking Changed on the Road

Several months into travelling, our view shifted considerably.

The financial picture became clearer once we were actually living it. Our monthly costs are meaningfully lower than they were in the UK – check out our article on what long term travel actually costs. Our savings are lasting longer than we projected. The short-term thinking that drove our pre-departure caution no longer reflects our actual situation.

We now have a longer view as we’re not planning to return and immediately need a large sum of money. With that longer horizon, holding money in a cash ISA at a modest rate starts to look like a real cost rather than a sensible precaution. Over several years, the difference in real returns between a cash ISA at 4.3% and a stocks and shares ISA delivering average long-term market returns of 8-12% is not trivial.

We’ve shifted the bulk of our ISA holdings into stocks and shares as a result. We’re comfortable with the fact that the value will go up and down in the meantime. The logic is straightforward: if you’re not planning to touch the money for several years, short-term market movements are noise rather than risk. The real risk of a long time horizon is not short-term volatility but the certainty is inflation slowly eroding the purchasing power of money sitting in cash.

This isn’t a recommendation. It’s the reasoning we applied to our specific situation, with our specific time horizon and our specific risk tolerance. Anyone in a different position may reach a different conclusion, which is why the last section of this article covers when professional advice is worth seeking.

Where We Hold Our Travel Savings

This is a separate question from the ISA question, but it comes up in the same conversation so it’s worth addressing directly.

Our ISAs are long-term holdings we are not touching while we travel. Our travel savings – the money we are actually spending down month by month – are held in a Starling easy access savings account. The rate at the time of writing is 2.5%, which is convenient and FSCS-protected, but is not the best available easy access rate in the UK. You can currently find rates around 3.8% and we are actively pursuing making this switch to maximse every penny. If you’re heading off for a year or more and want your travel savings working as hard as possible before you leave, it’s worth a quick comparison – easy access rates across the main challenger banks and platforms do vary, and on a sizeable travel pot, even half a percentage point makes a difference over twelve months.

We keep a small float of around £200 in our Wise for operational convenience (check out our 2026 Wise Review for more information on why), but the bulk of the travel fund still sits in Starling. The reason we use Starling as our primary travel spending card is covered in detail in our Starling vs Wise vs Revolut article.

What to Do Before You Leave: A Checklist

ISA admin:

• Contact your ISA provider and notify them if you are becoming non-UK-resident
• Confirm you will not make further contributions after your departure date
• Set up a correspondence address in the UK if you don’t have a permanent one
• Make sure you know your login details and can access your account from abroad

Decisions to make before you go:

• Are you comfortable with your current split between cash and stocks and shares given your likely time horizon?
• If you are in cash and have a long horizon, have you considered the real cost of that over several years?
• If you are in stocks and shares and may need the money within a year or two of returning, have you thought about where markets might be when you land?
• Do you have enough in easy access savings to cover your travel period without needing to touch the ISA?

Tax residency:

• Check whether you understand when you will become non-UK-resident under the Statutory Residence Test. The rules are specific and depend on how many days you spend in the UK and whether you have ongoing ties. Our tax residency article covers this in detail.

Who Should Take Professional Advice

For most families leaving for a year of travel with a standard ISA split, the situation is genuinely straightforward: tell your provider, stop contributing, leave it alone. You don’t need an IFA for that.

It becomes more complex in a few specific situations. If you hold very large ISA balances where the composition decision carries significant financial weight, professional input is worth the cost. If you have other investments sitting outside an ISA wrapper, the tax implications of becoming non-resident become considerably more nuanced. If you are planning to be away for long enough that you might need to formally re-establish UK tax residency on return, that process has rules worth understanding in advance. And if any of your holdings are in funds or assets that may have specific restrictions for non-residents, it’s worth checking before you leave rather than after.

The Statutory Residence Test, non-resident tax treatment of UK investment income, and the rules around re-establishing residency are all areas where a qualified adviser adds real value if your situation has any complexity. A one-off session before you leave is usually sufficient – it doesn’t need to be an ongoing arrangement.

For what it’s worth, we didn’t take formal financial advice before leaving. Our situation was straightforward enough that we felt comfortable making the decision ourselves. If yours is too, this article should cover what you need to know. If you’re reading this and your situation feels more complicated than what we’ve described here, that feeling is probably correct.

For the full picture on planning your finances before long-term travel, see our pre-departure financial checklist.