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The short answer
A Pryme Fixed Box holds naira until a maturity date you set, so money for a home goal such as school fees, a building stage or a December trip is put aside and cannot be dipped into early; the rate is shown in the app when you open it. For someone in the US, the main gain is not the rate but holding the goal in the currency it will be spent in, so the naira amount you need is ready on the day whatever the exchange rate does then.
What a Fixed Box is
A Fixed Box is one of Pryme's four Savings Boxes, all Naira-only and all for naira held in Nigeria. You choose an amount and a maturity date, the rate is shown in the app before you commit, and the money stays in the Box until that date. Naira deposits are held by a licensed Nigerian microfinance bank, regulated by the CBN and insured by the NDIC up to the applicable limit.
| Box | In one line |
|---|---|
| Flexible | Save and withdraw when you need to |
| Fixed | Held to a date you choose |
| Investment | Funds lending by a licensed Nigerian microfinance bank; return depends on that lending |
| Interest-free | Earns nothing, by design |
Why hold a naira goal in naira
If you will spend the money in Nigeria, the amount that matters is the naira figure on the invoice. Keeping dollars until the week of payment means your goal depends on one exchange rate on one day. Converting gradually and parking the naira in a Fixed Box spreads that risk and gives you a fixed pot to point to when family ask.
The trade-off: if the naira strengthens, you would have needed fewer dollars by waiting. If the naira weakens, you are glad you converted early. Nobody can tell you which, so the question is whether certainty about the naira amount is worth more to you than the chance of a better rate later. Our guide to averaging into naira covers the timing.
Goals that fit a Fixed Box
- School fees due at the start of a Nigerian term.
- A building stage you have agreed with a contractor (see protecting each stage payment).
- A parent's annual rent.
- A December trip home, with spending money waiting in naira (see keeping a naira stash for December).
- A wedding or naming ceremony contribution.
Setting one up from the US
- Price the goal in naira and set the date it is needed, leaving a few days' margin.
- Fund your NGN balance: convert dollars with Swap (rate first, fee on its own line, you approve) or receive naira from someone in Nigeria.
- Open a Fixed Box, read the rate and maturity shown, and move the naira in.
- Add further Boxes as you convert more, each maturing on or just before the due date.
- On maturity, pay the school or contractor from your NGN balance, or keep it for your trip.
A worked example
Example only. Amounts are illustrations, not Pryme figures. Ngozi in Philadelphia must pay ₦3,000,000 in school fees for her niece in September. In January she decides to set aside ₦375,000 a month for eight months. Each month she converts enough dollars with Swap, checks the rate and fee shown, and opens a Fixed Box maturing on 1 September. By August she has eight Boxes totalling ₦3,000,000 (8 × ₦375,000), all due on the same day, plus whatever the Boxes earn at the rates shown when she opened them. The dollars each month varied with the rate; the naira target did not.
Fixed Box or the alternatives
| Option | Upside | Downside |
|---|---|---|
| Keep dollars in the US until the bill is due | Earn US interest; benefit if the naira weakens | The naira amount you get depends on the rate that week |
| Send money to a relative to hold | Simple, and the money is already in Nigeria | It is in their name, and easy to spend on something else |
| A fixed deposit at a Nigerian bank | Familiar product with a set term | Usually needs a Nigerian account and branch paperwork |
| A Fixed Box in your own Pryme account | Your name, a date you choose, opened from the US | Held to maturity; a naira asset if plans change to dollars |
Many people combine them: dollars for US needs, a Fixed Box for the Nigerian bill with a firm date, and a Flexible Box for the extras. The point is that each pot has one job.
Things to keep in mind
- Choose the date carefully. A Fixed Box is held to maturity, so a date that is too late can leave you short on the day.
- Keep a Flexible Box for surprises. Uniforms, transport and price rises are rarely in the first quote.
- Nigerian tax. A 10% withholding tax has been deducted from savings interest since January 2026 (BusinessDay, February 2026); the app shows how your earnings are presented.
- US reporting. US citizens and residents are taxed on worldwide income (IRS Publication 54). Naira held in Nigeria counts towards the FBAR threshold of more than $10,000 in foreign accounts at any time in the year (IRS comparison chart, September 2026).
Where Pryme fits
Pryme Financial Ltd is a technology company, not a bank. Your Personal Assistant, named Eva by default, can remind you to convert each month and prepare the transfer into a Box; nothing moves until you approve. See Savings Boxes for the full set. Information only, not financial advice.
Questions people ask
What is a Pryme Fixed Box?
A Naira-only Savings Box that holds money until a maturity date you choose, with the rate shown in the app when you open it.
Can I use a Fixed Box if I live in the US?
Yes. Personal Accounts can be opened from any country; you fund the Box with naira in your account.
Can I withdraw from a Fixed Box early?
It is held to maturity, so pick a date that matches when the money is needed.
Should I save in naira or dollars for a Nigerian expense?
If the cost is in naira and the date is fixed, saving in naira removes exchange-rate risk on the day you pay. You give up any gain if the naira strengthens.
Sources
- BusinessDay: Why was withholding tax deducted from savings interest (21 Feb 2026) · accessed Oct 2026
- IRS: Publication 54, Tax guide for US citizens and resident aliens abroad (Rev. 12/2025) · accessed Oct 2026
- IRS: Comparison of Form 8938 and FBAR requirements (reviewed 19 Sep 2026) · 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.