Boris Johnson could earn more than £3m next year from speaking fees at conferences and book deals, experts have suggested, although his biographer warned he may also consider running for prime minister again .
Andrew Gimson said Johnson would jump into a lucrative career in journalism and public speaking after being forced to resign as UK prime minister. However, he said Johnson may not be able to resist the lure of Downing Street because he "wants it more than anything else".
"I don't know how he's going to play the game from now on, but he considers politics a higher calling than journalism," Gimson told Times Radio. "He's going to do a lot of journalism, he's going to make a lot of speeches, he's going to make a lot of money, but I'd be surprised if he thinks he can get through the rest of his life without trying to be prime minister again."
"He once said they were all 'buzzing like crazy bees in a jam jar.' Everyone wants to be prime minister, and he wants it more than everyone else," said Gimson.
Johnson owns a £1.3m townhouse in Camberwell, south-east London, with his wife Carrie, although the property is rented out for at least £10,000 a year, according to Johnson's declaration of interests.
The house was being renovated in May this year when a car crashed into its front garden, causing minor damage.
The Prime Minister also has a 20% stake in his family farm in Somerset, which is also rented out, and owns a Grade II listed house in North Weston, Oxfordshire, which has a tennis court and swimming pool. It is also being rented out, for more than £4,250 a month, according to a listing placed last year with estate agents Strutt & Parker.
Johnson's predecessors in Downing Street have been able to receive large sums of money as payment for private speeches given at corporate events.
Theresa May has earned £2.1million from public speaking fees alone since leaving Downing Street in 2019. She has traveled the world and given speeches in places including Seoul and Copenhagen.
In 2019, Johnson earned £122,899.74 for a speech he gave in India after leaving the post of Foreign Secretary.
Additionally, he earned £275,000 a year as a columnist for The Daily Telegraph and in 2015 he received an £88,000 advance from Hodder & Stoughton for a biography of Shakespeare, which was titled Shakespeare: The Riddle of Genius". The overall book deal was reported to be up to £500,000.
The biography was originally planned for release in 2016 to coincide with the 400th anniversary of the Bard's death, but the publishers agreed to delay publication when Johnson was appointed Foreign Secretary.
Dominic Cummings, the prime minister's former top adviser, claimed Johnson took time off during the early weeks of the coronavirus crisis to write the book, claiming the prime minister needed the money to help pay for his costly divorce from Marina Wheeler , but the Human Rights lawyer in No. 10 denied the charges.
Johnson's previous book for Hodder & Stoughton, a biography of Winston Churchill called The Churchill Factor: How One Man Made History, was a bestseller, although it also received criticism.
It is unclear whether Johnson will also give up his seat as MP for Uxbridge and South Ruislip, where he won a majority of 7,210 votes in 2019. As for his predecessor, David Cameron stood for just two months as MP for Witney after leaving Downing Street while Tony Blair resigned immediately as MP for Sedgefield.
However, John Major and Gordon Brown waited until the next election to stand down after their respective defeats in 1997 and 2010, while May remains a Conservative MP despite stepping down as prime minister.