The tax affairs of football manager Jose Mourinho should be investigated by British officials following allegations he used off-shore companies to reduce his tax bill, a UK MP has said.

Mourinho is accused of moving millions of pounds of earnings to the British Virgin Islands to avoid paying tax.

The Manchester United manager’s agent said the allegations were “unfounded”.

Public accounts committee chairwoman Meg Hillier told the Sunday Times the claims required “close examination”.

HM Revenue and Customs said it would not comment on named individuals, but took “all allegations of tax evasion extremely seriously” and “always investigates allegations of fraud together with any intelligence provided”.

Further claims about the tax affairs of Mourinho – as well as other top international football stars – have been made in the Sunday Times and other European newspapers.

The publications acquired leaked documents from the website Football Leaks, following a cyber attack on football agents earlier this year.

Mourinho has been accused of using “a complex web of off-shore companies” to avoid paying tax in the UK and Spain.

The allegations surround his time as manager of UK side Chelsea, between 2004 and 2007, and Spanish club Real Madrid, between 2010 and 2013.

According to the reports, Portuguese-born Mourinho, 53, placed £10m (€12m) into a Swiss account owned by a British Virgin Islands (BVI) firm.

The newspaper claims Mourinho and his advisers deducted substantial costs for a BVI company – which it suggests has no employees.

The Sunday Times says Mourinho – as well as Real Madrid star Cristiano Ronaldo – also used bank accounts and companies in Ireland, Switzerland and New Zealand to process substantial earnings for their image rights.

However, Jorge Mendes – the agent for both Mourinho and ex-Manchester United player Ronaldo – denies the claim.

He says both men were fully compliant with UK and Spanish tax rules.

The statement added that the allegations stemmed from a cyber attack earlier this year on some sports agents, details of which were prohibited by a Spanish court from being published.

Image caption Leaked documents have also resulted in allegations about Cristiano Ronaldo

The head of HMRC will appear before Ms Hillier’s committee – which is responsible for overseeing government expenditure – this week.

The Labour MP told the BBC: “I think it is really important that the tax authorities take a really close look at what’s gone on and we will be raising this with them on Wednesday.”

She said the allegations would be “galling” for football fans who buy season tickets and spend a lot of their disposable income on watching games.

“On Wednesday, we are already examining HMRC on how they deal with high net-worth individuals and it is clear that there are issues there about the resource they have got and how they go about dealing with people with very large amounts of wealth,” she said.

A spokesman for the tax authority said last year it had received an additional £800m “to help tackle the cheats” by increasing the number of people prosecuted.

He added: “HMRC carefully scrutinises the arrangements between football clubs and their employees in respect of any image right payments to make sure the right tax is paid – in recent years we have identified more than £80m in additional tax payable from clubs, players and agents.

“We take seriously allegations that customers or their agents may have acted dishonestly in the course of an enquiry, and can reopen closed cases if we suspect this has happened. “