[1] He was at first intended for the bar, like his elder brother, but shortly after took holy orders.

In 1753 he was elected to a fellowship at his college, but after short residence became vicar of Haxhay with the rectory of West Halton, both in Lincolnshire.

In 1761 he was appointed chaplain in ordinary to the king, a position which he held till 1787, being also from 1770 to 1794 prebendary of Peterborough, and at the same time rector of Castor, Northamptonshire.

Madan was twice married, first to Lady Charlotte, second daughter of Charles Cornwallis, 1st Earl Cornwallis (who died 1794, aged 68, and was buried in the Abbey Church at Bath).

By her he had two sons, Spencer, and William Charles, who became a colonel in the army; and a daughter, Charlotte who married General George Warde (1725–1803).