The verdict in three sentences
The diaspora holds enormous purchasing power, but it abandons a cart priced only in local currency because it can't tell what it will really pay. Displaying NGN, USD and ZAR with conversion at a 2.5-4 % spread removes that uncertainty and lifts the diaspora basket by around 18 %. The trap to avoid: letting international card fees (2.9 % + 30 cents) eat your margin without pricing them in.
Spread, fees and currencies: the 2026 table
Each added currency has a cost and an impact. Here are 2026 orders of magnitude for a store serving the diaspora.
| Currency | Applied spread | Int'l card fee | Typical use |
|---|---|---|---|
| NGN | 0 % (reference) | Mobile money | Local customers |
| USD | +2.5 % | 2.9 % + 30 c | US diaspora |
| GBP | +2.5 % | 2.9 % + 30 c | UK diaspora |
| ZAR | +3.5 % | 3.8 % (Flutterwave) | Southern Africa |
| EUR | +2 % | 2.9 % + 30 c | EU diaspora |
USD and EUR remain the most profitable pairs; more volatile currencies require a wider spread to hedge.
Impact on margin and average basket
Multi-currency pays off provided you calibrate the spread. Here is the effect on a typical store, 2026 estimate.
| Scenario | Avg basket | Total fees | Net margin | Diaspora basket |
|---|---|---|---|---|
| NGN only | 20,000 NGN | 1.4 % | Reference | — |
| + USD (2.5 % spread) | 23,600 NGN | 4.4 % | +1.0 pt* | +18 % |
| + GBP (2.5 % spread) | 24,000 NGN | 4.4 % | +1.0 pt* | +20 % |
| + ZAR (3.5 % spread) | 24,400 NGN | 5.2 % | +0.8 pt* | +22 % |
*Net margin after spread and card fees: the spread partly offsets the international card cost, preserving margin despite higher fees.
Mini case study
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Ngozi, a jewellery maker in Lagos selling to the diaspora, displayed only NGN. Her diaspora basket stalled at 20,000 NGN with high abandonment among US and UK customers. After adding USD display (+2.5 % spread) and card payment, her diaspora basket rose to 23,600 NGN (+18 %) and abandonment fell. Over 200 diaspora orders/month, that's +720,000 NGN in revenue, most of which stays as margin once the spread is captured.
FAQ
Why add a spread on top of the market rate?
Because the spread (here +2.5 %) covers FX risk and part of the international card fee (2.9 % + 30 c). Without it, every foreign-currency sale would cut straight into your margin.
How many currencies should I offer?
Start with local currency + USD + GBP/EUR, which cover most of the diaspora. Only add ZAR if you explicitly target southern African markets.
Does multi-currency complicate accounting?
A little, since you must record the rate applied to each sale. A good module freezes the rate at purchase time and exports it for accounting, avoiding FX discrepancies.
Is international card payment essential for the diaspora?
Yes for USD and GBP, as the diaspora mostly pays by card. Keep mobile money for local customers and offer cards alongside for the diaspora.
Let's talk about your project. We set up your multi-currency checkout without wrecking your FX margin. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
