“How much extra should I hold in rupees, naira, dollars or another currency?”
Foreign currency and exchange-rate risk for Student visa funds
Short answer
Most foreign currencies are converted using the OANDA spot rate on the application date. If your balance only just equals the pound requirement at an earlier rate, a currency movement can create a shortfall when you apply.
The application-date rate matters
FIN 1.1 uses the spot exchange rate appearing on OANDA for the application date. Specific currencies named in FIN 1.2 and FIN 1.3 use the applicable FCDO Consular Exchange Rate instead.
A buffer is not an official fixed percentage
The rules do not prescribe a universal exchange-rate buffer. Holding only the exact converted amount leaves no protection against an adverse movement or ordinary account activity during the qualifying period.
Keep the pound requirement as the reference point
Recalculate close to the application date and avoid describing any local-currency figure as permanently sufficient. The legal requirement is the pound amount after the specified conversion.
Where this answer stops
Official sources
Checked against the live sources on .
Currency conversion
FIN 1.1–1.3 →Foreign-currency evidence
OANDA conversion guidance →