To amend the Internal Revenue Code of 1986 to expand the one-time exclusion of gain from sale of a principal residence based on the amount of increase in equity in the new residence.

Amends the Internal Revenue Code to allow a taxpayer who has attained age 45 to compute a maximum one-time exclusion from the sale of a principal residence based on the increase in equity in the new residence. (Current provisions govern the one-time exclusion from sale of a principal residence by an individual who has attained age 55.)