Your UK ISA and Pension After You Stop Being a UK Resident: What an NRI Keeps, What Stops, and the Tax-Free Myth That Costs Returners in India

A reader who spent eleven years in London, building a stocks-and-shares ISA worth about 50,000 pounds and a workplace pension on top, moved back to Pune in 2025 and asked me a question he thought was simple. His UK adviser had told him the ISA was "completely tax-free", so he assumed he could leave it alone, let it grow, and never think about it again. He was half right. The ISA is tax-free, but only in the UK, and only against UK tax. The instant he became Resident and Ordinarily Resident in India, that same ISA turned into an ordinary foreign portfolio in the eyes of the Indian tax authority, with every dividend and every gain inside it taxable in India. Nobody had told him that the wrapper stops at the border.

The 30-second answer: When you stop being UK resident, you keep your UK ISA and it stays free of UK tax, but you cannot subscribe new money to it (or open a new one) for any tax year you are non-resident. You also keep your UK workplace pension and SIPP, and you can usually still get basic-rate relief on up to 3,600 pounds gross a year for five tax years after you leave, even without UK earnings; beyond that you need UK relevant earnings. The trap NRIs miss: the ISA's UK tax-free status is not recognised in India. Once you are Resident and Ordinarily Resident (ROR), India taxes the dividends, interest and capital gains inside the ISA under Indian law, and you must report it in Schedule FA. Drawing a UK pension while living in India is governed by the India-UK DTAA.

This guide is for the NRI who lived and worked in the UK, built up an ISA and a pension there, and is now leaving: moving home to India, or onward to the UAE, the US or somewhere else. It assumes you understand basic Indian residency; if not, start with the residency and RNOR guide. What follows is exactly what happens to each wrapper the day your UK residence ends, the five-year pension contribution window most people waste, a worked example on a 50,000 pound ISA showing the UK treatment against the Indian treatment once you are ROR, and the edge cases that catch people: QROPS transfers, returning to the UK, the way the US treats ISAs, and the UK State Pension.

The ISA: you keep it, but you cannot feed it

An ISA, the Individual Savings Account, is the UK's main tax shelter for ordinary savers. Inside it, interest, dividends and capital gains are free of UK income tax and UK capital gains tax, with an annual subscription limit, currently 20,000 pounds a year across all your ISAs. While you are UK resident it is one of the cleanest tax breaks available, which is why so many NRIs who worked in Britain have one.

The rule when you leave is precise and it is the first thing to get right. You cannot pay new money into an ISA, or open a new one, for any tax year in which you are not UK resident. The UK tax year runs 6 April to 5 April, and residence is tested year by year. The one narrow carve-out is for certain Crown employees serving overseas (and their spouse or civil partner), which does not help an ordinary NRI moving home. The practical effect: the day your UK residence ends, your subscription ability switches off.

What you do not lose is the account itself. You can keep an existing ISA open, and everything already inside it carries on enjoying its UK tax-free status. The interest still pays UK-tax-free, the dividends still arrive UK-tax-free, and if you sell holdings inside the wrapper there is no UK capital gains tax. You are simply frozen at the balance you had, plus growth, with no new contributions allowed.

Two housekeeping points matter here. First, you must tell your ISA provider once you stop being UK resident. This is not optional, and a provider who finds out later can be awkward about it. Second, not every provider will keep a non-resident's account open. Many UK platforms, for their own compliance reasons, will not service non-residents and may ask you to move or close the account. That is a commercial decision by the provider, not a tax rule, but it means you cannot assume the account simply sits there untouched. Check with your provider before you leave, because finding out after you have moved that they want the account closed is a far worse position than planning the move while you still have a UK address and UK bank access.

If you return to the UK and become UK resident again, your subscription ability switches back on from that tax year. You can use that year's full allowance. What you cannot do is backfill: the years you spent abroad are gone, and there is no catching up on missed allowances. So the ISA is genuinely a "keep but freeze" asset for the duration of your time outside the UK.

The myth that costs the most: the ISA is not tax-free anywhere except the UK

This is the single biggest miss, and it is worth stating bluntly. The UK ISA's tax-free status is a UK rule. It binds the UK and nobody else. India, the US, the UAE and every other country tax you under their own law, and none of them recognise the British wrapper. To a foreign tax authority, an ISA is just an account holding shares, funds, cash, interest and dividends. The fact that the UK has agreed not to tax what is inside it is irrelevant to them.

For a returning NRI, that means the moment you become tax-resident in India, the contents of your ISA fall into the Indian tax net. Dividends from the shares and funds inside it are Indian-taxable. Interest is Indian-taxable. Gains when you sell holdings inside the wrapper are Indian capital gains, taxable under Indian law, even though the UK charges nothing and even though you never took the money out of the ISA. India taxes the economic income; the wrapper is invisible to it.

There is one important softener: the RNOR window. When you return to India after being an NRI, you usually pass through one to three years as Resident but Not Ordinarily Resident before you become Resident and Ordinarily Resident. During RNOR years, foreign income that does not arise from a business controlled in, or a profession set up in, India is generally not taxable in India. So the income and gains inside your ISA are typically still sheltered from Indian tax during your RNOR years. The cliff arrives the year you tip into ROR status, at which point your worldwide income, ISA included, becomes fully Indian-taxable. The mechanics of RNOR, and how many years you get, are in the residency and RNOR rules guide, and the RNOR window is the single most useful planning tool a returner has, so read it before you assume anything.

The other duty that switches on is reporting. Once you are ROR, you must disclose the ISA, like any foreign asset, in Schedule FA of your Indian income-tax return. Failing to report foreign assets carries its own penalties under the Black Money Act, separate from the tax on the income, so this is not a box you can quietly skip. The Schedule FA mechanics are covered in foreign asset reporting.

The UK pension: you keep it, and the five-year window is the part people waste

UK pensions, whether a workplace defined-contribution scheme, a personal pension, or a Self-Invested Personal Pension (SIPP), behave differently from ISAs when you leave, and on the whole more generously.

First, you keep the pension. Leaving the UK does not force you to do anything with a UK pension. It stays invested, it keeps growing tax-free inside the UK wrapper, and you can draw it later under UK pension rules. There is no requirement to transfer it, cash it, or move it.

Second, and this is the part most NRIs do not know about, you can usually keep contributing for a while and still get UK tax relief. The rule is specific. If you were a relevant UK individual, broadly someone who was UK resident at some point in the relevant period, you can pay personal contributions of up to 3,600 pounds gross a year into a UK pension you held before you left, and get basic-rate (20%) tax relief on it, for up to five tax years after the tax year in which you left the UK, even if you have no UK relevant earnings at all.

The arithmetic of "3,600 gross" is worth spelling out because it confuses people. You pay in 2,880 pounds of your own money, the pension provider claims 720 pounds of basic-rate relief from HMRC and adds it to your pot, and the gross contribution is 3,600 pounds. That 720 pounds is, in effect, free money from the UK Treasury, available to a non-resident who has already left, for five tax years. For an NRI in India or the UAE with no UK income, this is one of the few UK tax breaks that survives departure.

The five-year window has hard edges, so be precise about it:

• It runs for five tax years following the tax year you became non-resident. If you leave during 2025/26, the clock runs through the five tax years after that.
• The contribution must go into a pension scheme you held before you left (you cannot start a fresh UK pension as a non-resident and claim this).
• The cap is 3,600 pounds gross per year, not your full annual allowance. The larger annual allowance only helps if you have UK relevant earnings, which a typical NRI abroad does not.

Once the five years are up, the relief stops unless you have UK relevant earnings chargeable to UK tax. An NRI working and taxed in India or the UAE will not have those, so in practice the five-year, 3,600-pound window is the whole opportunity. The honest read is that few NRIs bother, and many do not even know it exists, so they leave the 720 pounds a year on the table for five years running, a little over 3,600 pounds of free relief, simply because nobody told them the window was open.

How the pension is taxed when you eventually draw it is a separate question, decided by the treaty between the UK and wherever you are resident at that point. For someone retired in India, that is the India-UK DTAA, and the broad position is that a private or employer pension is taxable only in your country of residence, so an Indian-resident retiree drawing a UK private pension is taxed in India, not the UK. UK government-service pensions are the exception and generally stay UK-taxable. The treaty detail is in the India-UK DTAA deep dive and the broader treatment of pensions in NRI pension taxation.

Worked example: a 50,000 pound stocks-and-shares ISA, London to Pune

Take Anand. He spent eleven years in London and built a stocks-and-shares ISA worth 50,000 pounds, holding a global equity fund and a few UK shares. In 2025 he moves back to Pune. He keeps the ISA open with a provider that services non-residents, and he leaves it invested. Assume the portfolio yields about 2% in dividends (1,000 pounds a year) and that in a later year he sells holdings inside the wrapper, crystallising a gain of 10,000 pounds. Take a rate of roughly Rs 105 to the pound for the Indian figures.

While he is non-resident in the UK, and during his Indian RNOR years:

In the UK, the ISA is doing exactly what the brochure promised. The 1,000 pounds of dividends is UK-tax-free. The 10,000 pound gain, realised inside the wrapper, is free of UK capital gains tax. He pays the UK nothing, and because he is non-resident he could not have added new money anyway.

In India, during his RNOR years, this foreign income is generally outside the Indian net because it is not Indian-source and does not arise from an Indian business or profession. So for those one to three RNOR years, the ISA is sheltered on both sides. This is the window to plan in: it can be the right time to realise gains, rebalance, or even unwind positions before the Indian charge switches on.

The year he becomes ROR in India, everything changes:

The UK treatment does not move. The ISA is still UK-tax-free. But India now taxes Anand on his worldwide income, and the ISA is part of it.

• The 1,000 pounds of dividends (about Rs 1,05,000) is foreign dividend income, taxable in India at his slab rate. For a 30%-slab taxpayer that is roughly Rs 31,500 plus cess, on income the UK taxed at zero.
• When he sells and crystallises the 10,000 pound gain (about Rs 10,50,000), India treats it as a capital gain on foreign securities. Foreign shares and funds are not listed on an Indian exchange, so they do not get the 12.5% equity rate; the gain is taxed under the rules for unlisted or foreign assets. Long-term gains on such assets are taxed at 12.5% without indexation under the current regime, so roughly Rs 1,31,250 plus cess, while short-term gains would be taxed at his slab rate. The exact characterisation depends on the holding period and the asset, which is why the capital gains guide matters here.
• He must also list the ISA in Schedule FA, by value, for the year.

The lesson is stark. The same account, the same 50,000 pounds, the same gains, costs nothing in the UK and a real Indian tax bill the moment Anand is ROR. And because the UK levied no tax inside the ISA, there is no foreign tax credit to set against the Indian charge: a foreign tax credit only exists where foreign tax was actually paid, and the UK paid none. Anand cannot use Form 67 to relieve tax that was never charged. The ISA's UK efficiency becomes, in India, a fully taxable portfolio with no credit cushion.

Set against this, the pension picture is friendlier. If Anand had used the five-year window, paying 2,880 pounds net each year, he would have collected 720 pounds of UK relief annually, over 3,600 pounds across the five years, growing tax-free inside the UK wrapper until he draws it, at which point the India-UK DTAA taxes the private pension in India. The pension rewards engagement; the ISA punishes the assumption that "tax-free" is portable.

Edge cases

QROPS: the overseas pension transfer that usually is not worth it. You may be pitched a transfer of your UK pension into a Qualifying Recognised Overseas Pension Scheme, a QROPS, often marketed to expats as a way to "take your pension with you". Treat these with real caution. Since 9 March 2017 the UK applies a 25% Overseas Transfer Charge to QROPS transfers unless a specific exemption applies, and the exemptions were tightened on 30 October 2024, removing the previous carve-out for schemes based in the European Economic Area. There is also an Overseas Transfer Allowance (currently 1,073,100 pounds), with the 25% charge biting on transfers above it, and a five-year look-back under which the charge can be reclaimed if your circumstances change within five UK tax years of the transfer. For most NRIs moving to India, where there is no useful QROPS destination, a transfer typically just exposes you to the 25% charge and high product fees for no real benefit. The honest read: keep the UK pension where it is unless a cross-border adviser shows you, in numbers, a clear and specific reason to move it.

Returning to the UK. If you come back and become UK resident again, your ISA subscription ability switches back on from that tax year, at the current allowance, with no backfill of missed years. Your pension contributions can resume on the normal UK basis, and if you have UK relevant earnings again you are no longer capped at 3,600 pounds. The friction in a return year is the residence transition itself: split-year treatment and the Statutory Residence Test decide exactly when you become UK resident, and that date governs from when you can subscribe again.

The US treats an ISA as a PFIC trap. If you are moving onward to the US, or you hold a US green card, the ISA is worse than merely unrecognised. The US does not honour the ISA wrapper at all, and a stocks-and-shares ISA usually holds pooled funds that the IRS classes as Passive Foreign Investment Companies (PFICs). PFICs carry punitive US tax treatment and heavy annual reporting on Form 8621, which can turn a modest UK fund into a disproportionate US compliance burden. For an NRI heading to the US, the ISA is often best simplified or unwound before US residence begins, and this is a question to settle with a US cross-border adviser, not to discover at your first US tax filing. The broad principle, that an ISA stops being efficient the moment another country's rules apply, is the same one set out in the India-US DTAA deep dive.

The UK State Pension is a separate thing. Everything above concerns ISAs and private or workplace pensions. The UK State Pension is built on your National Insurance record, not on a fund you own. If you worked in the UK and paid National Insurance, you may have built up entitlement (the full new State Pension needs about 35 qualifying years, with a minimum of around 10 to get anything). You can often pay voluntary National Insurance contributions from abroad to fill gaps and increase the eventual pension, which for many expats is unusually good value. When you reach UK State Pension age, the pension can be paid to you in India, although it is frozen (not index-linked) for residents of countries, including India, that have no relevant uprating agreement with the UK. So the amount you qualify for at the point you start drawing it does not rise with UK inflation afterwards. This is genuinely separate from your ISA and your private pension, and worth checking your NI record for before you assume you have nothing.

The closing read

The honest read is that the UK ISA and the UK pension behave in opposite ways when you leave, and the mistake that costs money is treating them the same. The pension is the asset that rewards you for engaging with it: you keep it, it grows tax-free in the UK, and for five tax years after you leave you can still extract 720 pounds a year of free UK relief on a 3,600-pound gross contribution into a scheme you already held, which almost nobody bothers to claim. Use that window. The ISA is the asset that punishes the assumption that it travels: you keep it and the UK keeps its hands off, but the wrapper means nothing to India, and the year you become ROR the dividends, interest and gains inside it become fully Indian-taxable with no foreign tax credit to soften the blow, because the UK levied no tax to credit. For a returner, the practical plan is clear. Tell your provider before you leave and confirm they will keep the account open. Use your RNOR years deliberately, because that is the only stretch where the ISA is sheltered on both sides and the natural moment to realise gains or rebalance before the Indian charge lands. Claim the five-year pension relief while it is open. Be sceptical of any QROPS pitch, because the 25% charge and the post-October-2024 rules usually make a transfer to India pointless. And if your next move is the US, deal with the PFIC problem before you arrive, not after. The wrapper stops at the border; your tax residence is what decides the bill.

Related guides

• NRI residency and RNOR rules
• The India-UK tax treaty in depth
• NRI pension taxation
• Foreign tax credit and Form 67
• Schedule FA foreign asset reporting
• Capital gains tax for NRIs on shares and mutual funds
• Retirement planning across two countries
• NPS for NRIs
• Tax-efficient investing for NRIs
• NRI portfolio asset allocation
• NRE, NRO and FCNR accounts explained
• UK NRIs and Indian funds: offshore income gains
• The UK FIG regime and the four-year window
• UK temporary non-residence and CGT

This guide is educational and general in nature. It is not individual tax or pension advice. The treatment of your ISA and pension depends on your exact residence in both countries, the year you left the UK, the year you become ROR in India, the treaty position, and rules that have changed recently and may change again. The QROPS transfer charge, the PFIC treatment of ISAs for US persons, the timing of gains inside the RNOR window, and the State Pension uprating position are areas where the cost of getting it wrong is high, so confirm your specific position with an adviser qualified in both jurisdictions before you transfer, sell, or file.