Working in the family business since he was eight years old, Mr Copeland, now 66, confirmed that it recorded a profit in 2015 following “a steady increase in revenue”.
Mr Copeland credited the McGregor effect for more young people buying suits.
The sharply dressed fighter has tweeted in the past telling his 1.4m followers that he has “more custom- made Louis Copeland suits that Louis himself”.
Mr Copeland said: “People dressing down on Monday, Tuesday, Wednesday, and Thursday is going out a bit, thank god, and people are upping their game and going out a bit more.”
The group operates six outlets employing around 60 people. There are several businesses in the group and accounts for one of the firms — Louis Copeland and Sons Ltd — showed accumulated profits fell to €1.25m in the year to the end of June 2014 from €1.47m the previous year.
Auditors state that this firm had a loss in fiscal 2014, but the directors say they are confident of improving its performance.
After the steady increase across the group in 2015, “things are looking promising for 2016”, he said.
“Over the last six or seven years, it has been tough but we have a good track record in coming through these things,” he added.