Three-homes Rishi Sunak today said he "doesn't need" up to £1,200 in energy bills help from his own government - and will give it to charity.
The Tory Chancellor admitted he is borrowing another £10bn for a £400-per-household discount from October that the wealthiest do not need.
People with second homes will even get £800 and people with third homes £1,200 - if they pay all those homes' energy bills.
But instead of denying them a payment, Mr Sunak challenged them to "set an example" and donate the money to charity.
Mr Sunak and his wife Akshata Murty have entered the Sunday Times Rich List as the 222nd-wealthiest people in Britain with a joint £730m fortune - mostly thanks to his wife's shares in her father's firm.
They are thought to have three UK homes - a listed manor with a swimming pool in Yorkshire, and a flat and townhouse in London.
The Chancellor's team have not denied the £1,200 figure, though they haven't clarified either if he pays the energy bills for all three homes. As it's a discount off bills, whoever pays the electricity bill will benefit.
Mr Sunak was challenged by a Sky News interviewer who told him "we don't need the money". But he replied: "Like me you can also give that money to charity if you don’t need it.
"You and I don't need it, but lots and lots and lots of people do."
Boris Johnson declined to say he’d give £400 to charity like the Chancellor, telling reporters: “My arrangements are different because I live in a government flat.”
The Prime Minister pays a fixed "benefit in kind" instead of paying his own energy bill, so wouldn't get the £400 saving personally.
It was also not immediately clear if the Downing Street flat would be eligible for the £400 off energy bills at all - because it is not paid to commercial buildings.
Under yesterday's announcement “buy now pay later” £200 discount off all Brits' electricity bills from October 1 - which had to be paid back over five years - has been axed.
Instead, all households will get £400 off their electricity bills from October over six months and it won't be paid back.
Mr Sunak argued he wanted to be "as universal as possible" with the £400-per-household discount, and there will also be targeted support for benefit claimants, pensioners and disabled people.
He told BBC Breakfast: "Second homes account for one or two per cent of the property stock."
He added: "When you’re trying to make policy that benefits tens of millions of people, there are only a couple of ways you can do that." He pointed to the problems with the council tax £150 rebate - which excluded people in the largest homes regardless of their household income.
He suggested wealthy individuals who do not need the £400 energy bills grant can "join me" in donating the sum to charity.
He told ITV's Good Morning Britain: "I'm sure you will join me in giving that money to charity."
