After his retirement from parliament in 1874, Pleydell-Bouverie became in 1877 associated with the Corporation of Foreign Bondholders, and was soon made its chairman. Under his guidance the debts of many countries were readjusted, and the corporation's scheme for dealing with the Turkish debt was confirmed by the sultan's iradé of January 1882. Bouverie was Deputy Chairman of the Mersey Railway at its opening in 1886. He was also director of the Great Western Railway Company and of the Peninsular and Oriental Steam Navigation Company. He addressed numerous letters to "The Times" newspaper under the signature of "E. P. B."