I work at a non-US bank and we can't have US citizens as clients because of fatca. We would like to have them as clients but AFAICT fatca compliance would cost

I work at a non-US bank and we can't have US citizens as clients because of fatca. We would like to have them as clients but AFAICT fatca compliance would cost us a non trivial amount of money for the few (but relatively wealthy) potential clients