He was educated at Ley's School,[5] Cambridge and graduated in history [6] from Jesus College, Oxford University[5][7] in 1915.

[8] He later studied law at the Inner Temple and was called to the Bar in 1917[5] and practised as an advocate[5][7] before joining the Justice Party in the early 1920s.

He was also instrumental in getting W. P. A. Soundrapandian Nadar nominated to the Madras Legislative Council as a Justice Party nominee.

[9] In 1930, when the Justice Party returned to power after a gap of 4 years, Rajan was appointed Minister of Public Works.

[22] In the early 1950s, through his efforts, the present panchaloha idol of Lord Iyappan was installed at Sabarimalai and a procession was taken all over Madras state.

[25] P. T. Rajan's uncle M. T. Subramania Mudaliar of Uthamapalayam was a member of the Dravidian Association and one of the early leaders of the Non-Brahmin Movement.

Rajan's lavish spendings as Minister for Development under the Munuswamy Naidu regime at the height of the Great Depression along with those of others, invited the wrath of the media.

The newspaper India reported in the 25 March 1932 edition: When the country is on fire, when the axe of retrenchment has fallen on the poor and when the people are experiencing intense suffering under the heavy burden of taxation, the Madras ministers have started on their tours immediately after passing of the Budget.

Mr. Rajan is going to Hindupur today which is at a distance of 400 miles from Madras for laying the foundation stone for a Taluk Board School.