The overhead expenditure of the IDT also increased from R419.3 million in 2012/13 to R437.7 million in 2013/14. The increase of R18.4 million is mainly due to an increased expenditure on employee costs. The cost increased from R249.7 million to 270.2 million in 2013/14, an increase of R20.4 million, an increase of 8.2 per cent in nominal terms. National Treasury projects an inflation rate of 5.6 per cent for 2013/14.