Bank of America (BAC) completed nearly 25,000 mortgage modifications in October, up 51% from the 16,500 done the month before. BofA, the largest servicer in the U.S., said roughly 90% of the modifications done in October were through its own programs, not the Treasury's Home Affordable Modification Program. For the entire servicing industry, proprietary modifications outnumbered HAMP four to one in September. Rebecca Mairone, default servicing executive for BofA Home Loans, said a large number of the private modifications were for homeowners unable to qualify for HAMP or are no longer active in a completed modification. "When our customers do not qualify for a permanent HAMP modification, our team works very hard to find other homeownership retention solutions," Mairone said. Since January 2008, BofA completed 725,000 permanent modifications through both its own programs and HAMP. Since HAMP launched in March 2009, BofA has completed 88,500 permanent modifications through the program. Mairone said the bank has set a priority of reviewing trial modifications that have lasted six months or more. According to HAMP guidelines, a homeowner is eligible for a permanent conversion after three months. The Treasury's HAMP report, due out Thursday, will show 32,500 BofA homeowners have been in an active trial for more than six months. The bank said, ahead of that report, that 18,000 those borrowers already received permanent modification offers, and another 4,500 have been reviewed and are pending cancellation. This leaves 10,000 six-month or longer trials still waiting for a review. "At this time, we anticipate substantially completing decisions on the remaining 'aged trials' by year's end," Mairone said. "We have discussed our plans for meeting this goal with Treasury representatives, and will ensure that customers are kept informed about their status as those decisions are made." Write to Jon Prior.