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The short answer
No one can reliably predict the best day to convert pounds to naira, so returnees are usually better served by a staged plan: convert in regular tranches over the months before the move, convert only what you will spend in naira, and keep pounds for UK obligations and a buffer. Before you leave, tell your ISA provider: GOV.UK says non-UK residents can keep an ISA but cannot pay into it.
Most returnees ask the same question in the last year: should I convert now, or wait for a better rate? The honest answer is that nobody knows, including banks and market analysts. What you can control is how much rides on any single day. This guide sets out a staged approach for the twelve months before a move.
Decide what should never be converted
Before thinking about timing, separate money that should stay in pounds:
- A buffer for the first months, in case the move is delayed or you need to return.
- Anything you still owe in the UK: final council tax, a car finance balance, credit cards, a final tax bill.
- UK pensions, which stay in the UK system and are paid later.
- Money for travel back to the UK, if family remains there.
GOV.UK notes that if you leave the UK you can keep an ISA and its tax relief, but you cannot pay into it while non-resident and you must tell your provider. Many returnees keep an ISA as their pound reserve.
A staged plan for the final year
| When | What to do |
|---|---|
| 12 months out | List naira costs for year one. Decide the total naira you need and how much is already in Nigeria. |
| 9 to 3 months out | Convert an equal amount each month. Keep records of every conversion. |
| 3 months out | Convert enough for upfront costs such as rent, deposits and school fees, so they are not exposed to a last-minute move. |
| Final month | Leave the remaining pounds as your buffer. Convert later, in stages, as needed. |
This does not try to beat the rate. It averages your rate over many months, which lowers the chance of converting everything at a poor moment.
Worked example (made-up rates)
You need ₦30,000,000 and plan to convert £1,500 a month for 10 months, then hold the rest of your savings in pounds. If the monthly rates you get are ₦1,900, ₦2,050, ₦2,000, ₦2,150, ₦1,950, ₦2,100, ₦2,000, ₦2,200, ₦2,050 and ₦2,000, you collect ₦30,600,000 from £15,000, an average of ₦2,040 per £1. Converting all £15,000 in the first month would have given ₦28,500,000; in the eighth month, ₦33,000,000. The staged route sits in between, which is the point.
If the rate moves sharply
Large moves do happen, in both directions. If the naira weakens sharply during your plan, the monthly tranches buy more naira and you may reach your target early; you can stop converting and keep the rest in pounds. If the naira strengthens, each tranche buys less, and it is tempting to pause. Pausing turns the plan back into a timing bet, so most people are better off continuing, perhaps with smaller tranches, and topping up later.
Whatever the rate does, avoid converting under pressure. The worst rates tend to be the ones accepted in a hurry, from whoever can pay out fastest, with no time to compare. Upfront costs converted three months early remove most of that pressure.
Compare the naira you receive, not the headline rate
The official rate is set in the Nigerian foreign exchange market, and every provider adds a margin and sometimes a fee. The only number that matters is how many naira reach the account for each pound you send, after all charges. See why the rate you get differs from the headline and how to check the real exchange rate before converting.
Paperwork that saves trouble later
- Keep statements showing the source of the pounds (salary, sale of a car, savings) and each conversion.
- Your Nigerian bank may ask where large inflows came from; clear records make that quick.
- Your tax position changes when you stop being UK resident. GOV.UK explains that residents are normally taxed on worldwide income and non-residents only on UK income, and the tax year runs 6 April to 5 April.
- The 1987 UK-Nigeria double taxation agreement sets which country can tax income such as rent or pensions.
This is information, not tax advice. A split-year or residence question is worth checking against GOV.UK's residence guidance.
Common mistakes
- Waiting for a "better rate" and then converting everything in a hurry when rent falls due.
- Converting money you later need back in pounds, paying the margin twice.
- Carrying large amounts of cash. Cash rules apply on both sides; see how much cash you can carry to Nigeria.
- Closing every UK account before the move. Keep one for final bills and refunds.
Where Pryme fits
With a Pryme account you can hold pounds and naira in the same place and convert in tranches with Swap, which shows the rate and the fee before you approve. The account can be opened from any country, so it stays in use after you land. Every conversion has a record, and you can generate a verifiable statement to show a bank or landlord; see receipts and statements.
Questions people ask
When is the best time to convert pounds to naira before moving home?
Nobody can predict it reliably. Converting in equal tranches over several months spreads your risk across many rates.
Should I keep some money in pounds after moving back?
Yes, for a buffer, UK debts, pensions and travel. Converting money you later need in pounds means paying the margin twice.
Can I keep my ISA after moving to Nigeria?
GOV.UK says you can keep it and its UK tax relief, but you cannot pay in while non-UK resident, and you must tell your provider.
Will HMRC still tax me after I move back?
Once you are non-resident, GOV.UK says you pay UK tax only on UK income. Check the residence rules for the year you leave. This is information, not advice.
Sources
- GOV.UK: ISAs, if you move abroad · accessed Oct 2026
- GOV.UK: Tax on foreign income, residence (updated 1 Oct 2026) · accessed Oct 2026
- GOV.UK: 1987 UK-Nigeria double taxation agreement · accessed Oct 2026
This article is general information, not financial, legal or tax advice. Products described are provided under the terms on this site and are subject to regulation and eligibility.