The IMF board's move brings total disbursements under the blended Extended Fund Facility and Extended Credit Facility arrangements approved in July to about $287 million.
The IMF said Benin's economy was gaining strength despite heightened global uncertainty and increasing regional security risks, with economic output to grow by 6% this year.
"The program is off to a strong start, with all end-June 2022 performance criteria and indicative targets met and all structural benchmarks implemented," the global lender said in a statement.
However, high fuel and food prices, and the strong U.S. dollar, are expected to widen the country's current account deficit to 6.1% of gross domestic product, the IMF said. It noted that inflation had remained subdued given a strong harvest season and subsidy measures adopted after Russia's invasion of Ukraine on Feb. 24.