South Yorkshire Police and Crime Commissioner Shaun Wright has spent more than double what he originally revealed on home security measures.
Former Rotherham councillor Mr Wright, who was elected to the role last November, initially said he was spending £6,500 - but the total is now almost £15,000.
But the police chief said the spending is necessary to protect his wife and family - although he did not disclose whether he has ever suffered any threats to his safety.
Mr Wright said: “My home address is in the public domain, unlike anyone else who works in the criminal justice system who does not have to disclose where they live.
“There are risks that go with my position. If it was me living on my own I would not be so concerned. But while I chose this role my wife and family did not, and I am concerned for them.”
Mr Wright said the £6,500 initial cost of home security was for money spent so far - but a review of his security was still being completed at the time and further measures were deemed necessary.
Figures released under the Freedom of Information Act showed that Mr Wright’s actual security costs totalled £14,783.32.
South Yorkshire Police said: “The nature of the commissioner’s role sees the security implementations funded by the public purse.
“These costs will be recovered as far as possible when the commissioner finishes his term of office.”
Coun Penny Baker, Sheffield Council Liberal Democrat community safety spokeswoman, was concerned about details of the extra cost incurred by Mr Wright.
She said: “Given his substantial salary of around £70,000 a year - which is coughed-up by the taxpayer at the expense of more police officers – you might have expected him to search his own hefty pockets for at least some of this cost.
“It’s clear Shaun Wright is one of the most expensive Police and Crime Commissioners in the country.”