Revision hip Arthroplasty is a costly procedure, which is becoming more frequently indicated. We found that our unit revised a high proportion of hips that had been implanted in other health regions. A detailed cost analysis of a revision procedure was performed and has shown that the real cost is far more than the hospital finance department budget for. This represents a very significant cost to a trust for this type of surgery. The health care budget allocated to a trust does not take into account the geographic movement of the population. We estimate that the cost of revising hips, originally implanted in other regions, costs our hospital roughly the equivalent to a consultant surgeon’s salary per year.