MOSCOW, Aug 26 (Reuters) - The rouble gained against the

dollar on Tuesday in anticipation of approaching month-end tax

payments, when exporters usually sell their foreign currency

earnings to meet local liabilities, that support the Russian

currency.

At 0900 GMT, the rouble was up 0.55% at 80.25 to the

dollar, according to data compiled by LSEG based on

over-the-counter quotes.

The rouble was down 0.1% to 11.19 against China's yuan, the

most-traded foreign currency in Russia. On Monday, the rouble

hit a low for this month against the yuan, falling to 11.29.

Brent crude oil, a global benchmark for Russia's

main export, was down 1.02% at $68.07 per barrel, as traders

monitored potential disruption to Russian fuel supplies.

The rouble has been struggling against the backdrop of

geopolitical uncertainty and risks of a decline in export

revenues following Ukrainian attacks on Russian energy

infrastructure.

Russian corporations will make a single tax payment on

August 28, including a mineral extraction tax for July. Reuters

calculations show the tax for July oil production will amount to

roughly 575 billion roubles ($7.11 billion), compared to 543

billion roubles in June.

($1 = 80.8455 roubles)