Locking the currency
Whatever currency the proposal is issued in applies to every invoice for that project. This avoids a moving total on multi-month work.
Requesting a different one
Ask before the proposal is issued. Changing currency after booking means re-issuing documents.
Who carries FX risk
Your bank's conversion and any receiving fees are yours; our banking costs are ours. Neither side re-bills the other for currency movement.
Payment fees
Card processing costs are absorbed in the quoted price. Bank transfer intermediary fees, where your bank deducts them in transit, are not — please send the full invoiced amount.