Epacris rigida is an erect, bushy shrub that typically grows to a height of and forms a lignotuber. It has softly-hairy branchlets, the stems with conspicuous, more or less triangularleaf scars. The leaves are elliptic, rarely oblong, long and wide. The flowers are crowded at the ends of branches and are wide, each flower on a peduncle long with bracts at the base. The sepals are long and the petals are white or cream-coloured and joined at the base to form a tube long with lobes long. The anthers are visible near the end of the petal tube. Flowering usually in August and September, and the fruit is a capsule about long.