Premiership clubs lost nearly £50m between them in the last financial year with only the leaders, Exeter, recording a profit. Worcester, who came under new ownership earlier in the season, are not included as they are late in filing their accounts with Companies House.

The list includes London Irish, the Championship leaders, who are part of the 13-strong Premiership Rugby. The relegated Exiles lost £2.7m in the year. Wasps, whose £32.8m turnover was more than £10m greater than the next highest (Harlequins), lost £9.7m while promoted Bristol lost £7.2m.

The losses of every club were greater than the year before, when Exeter were also the only ones in the black: the Chiefs increased their turnover by more than £3m and recorded a profit of £533,000. The champions, Saracens, lost nearly £4m, although £48m in loans to the parent company by their owner, Nigel Wray, have been turned into equity and taken off the balance sheet.

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Only three clubs suffered a drop in turnover: Bristol, who had been relegated, Wasps, who were down £165,000, and Gloucester, who were £544,000 worse off, largely through a fall in concert income. Sale’s turnover increased by £89,000 and they were the only one of the regulars in the Premiership with a turnover of less than £10m, down to the club not owning its ground.

Newcastle lost more than £4.2m and the club closest to Exeter were Leicester, the best supported team in the Premiership, whose loss was £1.18m, up £290,000 on the previous year. Sale were the only other side with losses below £2m (£1.8m).

The figures are a significant reason why the clubs this season agreed to sell a 27% share in Premiership Rugby to the private equity firm CVC in a deal worth £200m. Each of them will receive £13.5m as part of a sum paid up front by CVC, money that has been earmarked for infrastructure improvements, although some of it is likely to be used to reduce debt.

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The clubs are allowed to invest 10% of it into the company set up by CVC to run the commercial arm of the Premiership, TopCo, which is what it did when running Formula One. It would give the clubs the opportunity to offset the 27% of the profits CVC will take each year through its stake in the top flight.

“I have often said that you cannot look upon a sports club as merely a profit and loss account as you might any other company,” said the Saracens’ chairman, Nigel Wray in his statement on the club’s accounts. “Sport is not like that: there is not much point in having a great profit and being 11th. We are building a major and, I hope one day, a global brand that will stand for good things and mean a lot to tens of thousands of people.

“All that said, the financial results were not good and the current year, financially speaking, is not looking significantly different, although we have made an important strategic move in converting outstanding loans to the parent company into equity and the balance sheet is far healthier. The CVC deal will be absolutely transformational for the club game and, indeed, the game as a whole.”

• This article was amended on 12 and 17 April 2019. We corrected the figure for London Irish’s loss from £10.52m to £2.7m. In addition, an erroneous reference to London Irish having lost more than any other club has been removed, and also an earlier version was wrong to say that the club had not revealed their turnover. This has been corrected.