This page explains what fee you must pay if you are applying from outside the United Kingdom under the investor category (Tier 1 Investor) of the points-based system to come to the United Kingdom.
You must pay £675, which is payable in local currency.
Once your fee has been received by the visa application centre, the fee is charged and cannot be refunded.
Any dependant applications accompanying your application form cost the same fee as your application, which is £675, payable in local currency.