Above the nave, a 4 bay clerestory, with on each side 4 pairs of single round headed cusped lancets within a shallow pointed and chamfered arch, each with a Tudor hood.
The clerestory is topped by a chamfered parapet pierced on each side by 3 gargoyles.
Within the porch are two wall monuments to Anne Jessop 1807 and William Petchel 1861.
The chancel has a Minton tile floor, a small ogee headed piscina, and a C19 wood and brass altar rail.
The stone octagonal, bowl and stem, font is C14 with 2-light panel tracer to each face.
TF1554 : Font, St Michael's church, Billinghay
C19 wooden choir stalls, pulpit and organ.
1888 stained glass east window.
Stained glass window for the Millennium installed in 2000. The quote is from John 4:35. The glass is by Gordon and Yvonne Monaghan of Artists in Stained Glass of Peterborough.
Two monuments in the chancel.
The south aisle is C17 and the north aisle C19.