Hull could face a points deduction next season unless they raise funds through player sales before the end of June.
The newly-promoted Premier League side are believed to be at risk of breaching profitability and sustainability regulations (PSR) despite securing promotion and the significant financial rewards that accompany a return to the top flight.
According to the BBC, Hull sit around £6million above the permitted loss threshold, with increased wages and promotion bonuses contributing to their financial position.
Club owner Acun Ilicali recently acknowledged the situation while addressing supporters.
He said: “We have overspent and we have to sell some players before 1 July.
“I’m not afraid. We have managed harder things. For us, this is more manageable.
“Now we are a Premier League team, the values has raised up which is a good advantage.”
Promotion to the Premier League is estimated to be worth around £200m, but clubs remain subject to financial rules governing losses over a rolling three-year period.
Hull could face a points deduction next season unless they raise funds through player sales before the end of June
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Football finance expert Kieran Maguire believes Hull must now adjust their transfer plans with the summer window open and the accounting deadline for the 2025-26 season falling on June 30.
Speaking to the Beeb, Maguire said losses in previous campaigns had been “relatively modest”.
That was “partly due to the fact that they had some very successful player sales and they contribute towards covering those losses.”
Hull generated more than £35million through the sales of Jaden Philogene and Jacob Greaves to Aston Villa and Ipswich in 2024.
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However, Maguire suggested promotion bonuses may have significantly increased the club's costs.
“The big challenge for Hull is that, as we saw with the Nottingham Forest charges and points deduction a couple of seasons ago, if a club pays promotion bonuses, those bonuses are included in the PSR calculations,” he explained.
“Therefore it can unwittingly knock a club over the £39m limit.”
Maguire estimates the total value of those bonuses could be around £15m following Hull's unexpected rise to the Premier League.
The Tigers also operated under transfer restrictions last season after being sanctioned for late payments, relying heavily on loan signings and free transfers as they secured promotion.
Lewis Koumas, Joe Gelhardt, John Lundstram and Amir Hadziahmetovic all spent the campaign at the club on temporary deals.
Hull City beat Middlesbrough to secure promotion to the Premier League last month
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Hull now face the challenge of balancing the need to remain compliant with financial regulations while assembling a squad capable of competing in the Premier League.
The Tigers are already 2/7 favourites to be relegated with without the threat of a points deduction.
Top-flight clubs are currently permitted to lose up to £105m over a three-year period, with certain expenditure, including academy, women's football, community and charitable spending, excluded from calculations.
The permitted losses reduce for clubs that spend seasons outside the Premier League, which has contributed to previous financial disputes involving clubs such as Leicester City.
Everton and Nottingham Forest have both been docked points in recent years for breaching spending regulations.
The Premier League is also preparing to replace its current rules with a new squad cost ratio system in the coming years.