The figure marked the highest level since 2010, when it hit 3.4 percentage points out of an overall 6.5 percent growth.

The GDP accounts cover production and sales, with an inventory glut included in production during a certain period.

Experts noted that an increase in inventory contributions is derived from lackluster consumption, reflecting weakening domestic demand and a recession in a business cycle.

The country's inventory rate reached 129.6 in August last year, the highest since December 2008, while a factory operating rate dropped to a nearly seven-year low of 72.7 percent in November.

"Companies are expected to adjust their inventory levels in the first quarter, leading to a slump in economic growth," said Kim Jin-myung, an analyst from Hi Investment & Securities Co.

The Korean government frontloaded some 40 percent of its budget in the first three months to slow the possible economic downturn in the face of low oil prices and a slowdown in China, with its growth target for 2015 set at 3.1 percent. (Yonhap)