By Sohee Kim and Hyunjoo Jin
SEOUL (Reuters) - A South Korean court on Friday ruled broadly in favour of Hyundai Motor Co (KS:005380) in a wage dispute with workers that could have exposed the automaker to $1 billion (0.65 billion pounds) in additional pay annually.
The dispute came as Hyundai, the world's fifth-biggest automaker together with Kia Motors (KS:000270), is trying to boost production in China and Mexico to avoid higher wages and regular labour strikes in Korea.
The court ruled that Hyundai Motor did not have to include regular bonuses in base wages for over 90 percent of its workers, a decision welcomed by the company and employer groups who feared a rise in benchmark pay rates.
"Hyundai Motor avoided the worst case scenario. This is good news for Hyundai Motor," said Suh Sung-moon, an analyst at Korea Investment & Securities.
Twenty three Hyundai Motor workers filed the suit in March 2013 saying Hyundai had miscalculated base wages and seeking unpaid overtime, allowances and severance pay.
The Seoul Central District Court ruled against 21 of the 23 claimants, representing all of Hyundai Motor's domestic employees.
Hyundai said in a statement the ruling "put an early end to the controversy over base wages".
A union spokesman said workers were considering whether to appeal. South Korea's umbrella labour union slammed the ruling as "lopsided" and "political" because it favoured powerful family-owned businesses.
Hyundai Motor shares ended down 2 percent, broadly in line with the wider market's (KS11) 1.36 percent fall.
The base wage issue was the main issue of contention in talks between the automaker and its domestic labour union last year and sparked a partial strike in September.
The two sides had earlier agreed to discuss the issue by the end of March this year, regardless of any court ruling.Business lobby group the Federation of Korean Industries said the ruling left open the possibility of further wage disputes in future.
"We are concerned that new conflict will emerge as the court recognised the bonuses of a very small number of workers as part of base wages," it said in a statement.
Hyundai's annual wages for workers more than doubled to 5.97 trillion won in 2013 from a decade ago, according to regulatory filings.