The firm can proudly trace its history back to 1924 when it was formed by A Latto who traded as A Latto Accountant from the Bank of Scotland buildings at 22 George Street, Perth, Scotland. Mr Latto was joined in 1949 by B H Dudman and at that time the firm of A Latto & Dudman Accountants and Income Tax Advisers was formed. In 1961 Mr Latto retired and L C Dudman joined his father as a partner.

In 1966, shortly after the death of his father, L C Dudman moved premises to 27 George Street then, in 1971 to offices at 20 York Place, Perth, Scotland - the birthplace of writer John Buchan.

In 1992 the firm moved to premises at 13 Marshall Place. The name of A Latto and Dudman continued until January 1995 when a major milestone in the firm's history was reached. Following the joining to the firm of chartered accountants Bruce Walton and John McKeith, for the first time in the firm's history it would be able to carry out audit work, and to reflect this major change the firm name was changed to Dudman and Walton, Chartered Accountants. Alun Morgan joined the practice in 1996 and enabled the practice to continue expanding and in March 2001 the Pitlochry Office was opened.

In 2002 the joining together of the firm with the long established Stirling practice of Chrichton Kilgour headed up by Mark McGrath, resulted in the change to the current name of Walton Kilgour Chartered Accountants.

In April 2008 Mark McGrath left the partnership and the Stirling office ceased to be part of the practice. Walton Kilgour continue to have an association with the Stirling office and appointments can be arranged to be held at this office. In September 2008, the Perth practice made the short move to recently modernised premises at 2 Marshall Place. On 31 August 2009, Bruce Walton retired as a partner and a year later, Janis Walker C.A., an associate in the practice who had taken over most of Bruce�s portfolio, was appointed as a partner.