She made three complete voyages for the British East India Company (EIC), and on the first of these she transported convicts to New South Wales.

In December 1813 she was lost in a gale to the east of Algoa Bay while homeward bound from her fourth voyage.

[3][1] Under the command of John Boyce, she sailed from Falmouth on 10 August 1805, bound for New South Wales and China.

[5] After some repairs William Pitt sailed on 25 June from Port Jackson for China arriving on 3 October.

[1] Captain Charles William Butler left Portsmouth on 21 June 1811, bound for Bengal.

[4] William Pitt reached Madeira on 2 July and left there three days later in company with Minerva, Harleston, Lord Forbes, and Lady Lushington, and under convoy of HMS Emerald.

She left Calcutta on 18 February 1812, passed Saugor on 17 March, reached St Helena on 15 June, and arrived at the Downs on 14 September.

She was homeward bound when she was lost in a gale at about midnight on 16 December 1813 while east of Algoa Bay; there were no survivors.