From time to time members of actuarial staffs are faced with the valuation of some class of business which, when carried out in full, is very tedious or which represents such a limited liability that a detailed valuation is somewhat out of place. Many methods of approximate valuation have been devised and remain hidden in the records of individual offices—amongst them those relating to Joint Life and Survivorship Annuities. The method described in the following pages was devised to enable an accurate valuation of that business to be carried out in about two hours each year, instead of having to rely on interpolated values for the years between full individual valuation at quinquennial intervals.