The duty is revised once every two months and depends on Urals crude prices on the international market. On August 1, the figure was set at $216.4 per ton.
"Export duty may hit a record high $238-239 per ton from October 1," said Alexander Sakovich, deputy head of the taxation and duties department with the Finance Ministry.
Sakovich said if the oil price fell to $65 per barrel in the three days left until September, the customs duty would be $238 per ton, but if the price remained as high as the current level of $68 for Urals crude, then the figure would be $239.
"If the oil price climbs to $70, customs duty would be $239.7," he said.
Urals is the leading blend of Russian oil, but suffers from a high level of sulfur in comparison with Brent crude.
