Is monthly PMI recalculated each month or a one-time calculation?Hello,I've been adverse to PMI for a long time, but after seeing the rates on PRIVATE mortgage insurance, it's actually sort of useful. But I'm trying to compute our monthly payment and am interested to know if the monthly PMI amount is updated by a constant rate/multiplier each month until we hit 78% or if it's computed at closing and remains the same price each month until we hit 78%?Any help would be greatly appreciated!September 14 2012 - US0YesReport a ProblemProblemSelect oneOffensive contentIrrelevant contentSpam (pure self-promotion)OtherDetailsYour emailPlease enter a valid email address.Submit CancelContent flaggedWe will review this content. Thanks for helping make the site more useful to everyone. To learn more, read Zillow's Good Neighbor Policy.We're sorry. This service is temporarily unavailable. Please come back later and try again.