He served twice as Member of Parliament for Devon, on both occasions together with his brother Sir William Cary, in 1363/4 and 1368/9, and in November 1386 he was appointed Chief Baron of the Exchequer.
He was initially sentenced to death for his part in the "Nottingham judgements", but this was commuted to banishment to Ireland with a pension of £20.
[12] He purchased the manor of Clovelly, on the north coast of Devon, where a junior branch of his descendants was seated until 1739 when it was sold to Zachary Hamlyn (1677–1759) .
[13] His son and heir Robert Cary is generally stated to have been the first of the family seated at Cockington,[14] on the south coast of Devon in Torbay.
[16] Many of his forfeited lands in Somerset, including Hardington Mandeville, a moiety of Chilton Cantelo, and premises in Trent (now in Dorset) were sold by the crown in July 1389 for 600 marks,[17] jointly to Sir John Wadham of Edge, Branscombe in Devon and Merryfield, Ilton, Somerset, Justice of the Common Pleas (1389–1398) and MP for Exeter in 1399 and for Devon in 1401,[18] together with Sir William Hankford (c. 1350 – 1423) of Annery in the parish of Monkleigh in Devon, Chief Justice of the King's Bench.