Membership to the Franklin County Grotto costs $7 per year for NSS members, $9 per year for Non NSS Members members  and $3 per year for dependents (age 17 & under) and Family Dues (spouses that are N.S.S. members).  Lifetime membership is available for 20 times the yearly membership charge.  If you join after July 1 yearly dues are half the usual fee.

Membership in the National Speleological Society (NSS) is encouraged but not required.