The Cheshire-headquartered group has posted a turnover of £154.7m for the year to March 31, 2023, up from £117.8m, while its pre-tax profits also rose from £33.3m to £39.3m.
The newly-filed accounts with Companies House also show the business increased its average headcount from 1,818 to 2,365.
A statement signed off by the board said: “The directors remain confident that the company is in a good position to meet the challenges and opportunities of the future.
“The hotels have managed to maintain their competitive edge through the economic downturn and continue to take steps designed to attract new business and improve market share going forward.”
Britannia Hotels operates more than 60 sites across the UK and also owns Pontins.
The company was founded in 1976 and is led by chief executive, and its largest shareholder, Alex Langsam.