The jobless rate showed a continuation of the downward trend of the last few months, the National Employment Agency said in a statement, falling by 0.22 percent from August.
The total number of unemployed people in September was 251,091, which was 8,219 fewer than in August and 61,622 fewer than in September 2006, the agency said.
Last year, Bulgaria's unemployment rate averaged 9.61 percent, down from 11.46 percent in 2005.
Consumer prices, the government said, rose 13.1 percent on the year in September, up from an 12 percent annual rate recorded in August.
Food prices accounted for most of the rise, increasing by 2.1 percent in September over August, the National Statistics Institute said. Prices of nonfood products increased by 1.3 percent, while prices for services dropped by 0.1 percent over the previous month.
Consumer prices in 2006 rose by 7.3 percent over the previous year, the institute said.
Bulgaria, a Balkan country of 7.7 million, joined the European Union in January.