Stamford and Grantham MP Nick Boles has clarified why he rents a flat in Stamford at the taxpayers' expense.
The planning minister is one of more than 300 MPs claiming rent - which costs the taxpayer more than £1m a year.
Mr Boles, who owns a flat in London, rents a £600-a-month Stamford property from Burghley House Preservation Trust.
He told granthampeople: "I rent a two bedroom flat in the town at a cost of £600 a month.
"This is borne by the taxpayer under the terms of the Independent Parliamentary Standards Authority (IPSA) rules governing second homes for MPs with constituencies outside London.
"IPSA would permit me to charge the taxpayer up to £1,660 a month to rent a flat in London as an alternative.
"I choose not to do this because I own a flat in London. I have a large mortgage on this property."
Mr Boles' parliamentary office spokesman said the London flat is the MP's primary residence during the week.
"He uses the Stamford rental property at the weekend when he attends surgeries in Stamford, Bourne or Grantham and other meetings in his constituency," he added.
New rules now ban MPs from claiming expenses for mortgages - but still allows them to claim for rent.