I have the below formula to calulate benefit increases depending on various
plan dates. It's working perfectly for what I need except that in some
instances there will be no value in cell B3 (a date). I need to figure out
how to rework things so that if B3 is blank the calculations in my IF
statements will still occur and I'm in over my head. Any assistance is
appreciated.

Thanks,
spence

=IF(AND($B$3$N$1,$B$1$N$1,$B$4$N$2),$B$5*(($M$2/12)*((YEAR($B$2)-YEAR($L$2))*12+MONTH($B$2)-MONTH($L$2)+1)+1),IF(AND($B$3<$L$1,$B$1<$L$1,$B$4< $L$2),$B$5*(($M$1/12)*((YEAR($B$2)-YEAR($L$1))*12+MONTH($B$2)-MONTH($L$1)+1)+1),IF(AND($B$3<$L$1,$B$1<$L$1,$B$4 $N$2),$B$5*(($M$1/12)*((YEAR($B$2)-YEAR($L$1))*12+MONTH($B$2)-MONTH($L$1)+1)+1)*(($M$2/12)*((YEAR($B$2)-YEAR($L$2))*12+MONTH($B$2)-MONTH($L$2)+1)+1),$B$5)))