Halkett said operating expenses as a percentage of sales were lower compared with the same period a year earlier, which contributed to earnings growth.
"Active management of operating costs continues to be a key focus and Kathmandu expects to gain further efficiency improvements in the future," he said.
Same-stores sales lifted 3.7 per cent in the first half, the company said.
Online sales rose 50 per cent on the same period a year earlier, Kathmandu said, although internet sales still represented less than 5 per cent of total revenue.
"Along with the continued growth in online sales, the new stores we opened in a variety of locations and formats have generally met or exceeded our sales expectations," said Halkett.
Shares rose 2c to $2.47 following the result.