Britain's Queen Elizabeth's home is charged just £1,375.24 council tax.
Despite being grouped in the highest property bracket, the 775-room Buckingham Palace is in Westminster - which has the second lowest rate in the country - and has a bill over £400 cheaper than the average for families in other areas of London.
Valuations on properties to classify them for council tax banding was done 18 years ago.
Buckingham Palace was placed in the highest-ranking Band H, which covers all properties valued at £320,000 or more.
Accountant Chris Collins pays £1,780 to Lambeth council for his four-bedroom home in Streatham, south London.
He told Britain's Daily Mail newspaper: "It is ridiculous to think that this house costs more in council tax than the queen pays for a palace. I don't know if that is a reflection of my tax being too high or hers being way too low, though."
Councillor Colin Barrow, leader of Westminster City Council, said: "We have consistently levied the lowest or second lowest council tax in England since the current system was introduced in 1993."
According to council officials, the queen's bill is paid out of the Privy Purse - income from the Duchy of Lancaster, a portfolio of assets held in trust to provide the monarch with a source of private income.
She also has to pay council tax on her other properties.
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