Dukes County ended the fiscal year with an estimated surplus of about $150,000, the county treasurer reported this week. A preliminary report of the county’s favorable finances was given to county commissioners last week.

Country treasurer Noreen Mavro Flanders reported that the county spent about $127,000 less than anticipated, and brought in about $114,000 extra in revenue, according to preliminary calculations. Both those figures will be adjusted in the coming months due to anticipated payroll costs in the amount of $11,415, and a $12,000 check owed to the airport.

The numbers “will be much more solid within a month, but there aren’t a lot of big differences that are going to happen here,” Mrs. Mavro Flanders said. “We had a much better year this year [than last year],” she added. Final information for fiscal year 2012 will not be known before November.

Mrs. Mavro Flanders attributed a successful fiscal year to the conservative spending of department heads. “They deserve the credit,” she said. “They work hard to stay within their budgets . . . We have always been very careful about anticipated revenues that are not overstated. I think it’s a very responsible budgeting process.”

At the county registry of deeds, an increase in deed and mortgage recordings brought in $19,000 more than anticipated.

The Integrated Pest Management program (formerly known as the rodent control program) headed by T.J. Hegarty exceeded anticipated revenue by more than $5,000, despite a decision by the town of Oak Bluffs not to participate this year.

Mrs. Mavro Flanders said she expects that some of the extra revenues will be dedicated to capital expenses, or long-term projects for which the county does not specifically allocate funds on a yearly basis, such as “redoing a furnace, or putting on an addition,” she said. In the coming months, county commissioners and newly-appointed county manager Martina Thornton will finalize amounts to be set aside.

The county operating budget for 2012 was $1.96 million.