The appellants were employees of the City of Johannesburg and members of the Johannesburg Municipal Pension Fund. Both retired in 1995 on grounds of total ill-health incapacity and began receiving monthly disability pensions calculated in terms of the Fund’s rules. They accepted the payments until 2003, when, after advice from a consultant, they suspected that their pensions had been incorrectly calculated. In 2006 they lodged a complaint with the Pension Funds Adjudicator, who upheld their complaint and ordered a recalculation at a higher rate. The Fund successfully reviewed that determination in the High Court, which also dismissed additional claims raised by the appellants in a counter-application. The appellants appealed to the Supreme Court of Appeal.