Russia has entered a recession, nine months after launching its offensive in Ukraine as Western sanctions weigh on the economy, according to official data.

Its Gross Domestic Product (GDP) shrank four percent in the third quarter, according to a preliminary estimate by the national statistics agency Rosstat published on Wednesday.

As that follows shrinkage of the same size in the second quarter, Russia now meets the technical definition of a recession with two consecutive quarters of falling GDP.

The four percent drop in economic output between July and September was less than the 4.5 percent contraction many analysts had expected, however.

The contraction was driven by a 22.6 percent plunge in wholesale trade and a 9.1 percent drop in retail trade. Meanwhile, construction grew by 6.7 percent and agriculture by 6.2 percent.

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Energy exports 

Russia's economy has been struggling with a myriad of problems. Western sanctions have limited exports and imports, including key manufacturing components and spare parts.

Companies have also been suffering from a lack of staff as a partial mobilisation has taken several hundred thousand men out of the workforce.

Despite a contracting economy, Russia's unemployment rate stood at 3.9 percent in September, according to Rosstat.

As a result, the Russian economy has become even more dependent upon energy exports, which have accounted for about 40 percent of federal government revenue.

According to the office of Boris Titov, the presidential commissioner for entrepreneurs, about a third of the 5,800 Russian companies recently surveyed had suffered a drop in sales in the past months.

The September mobilisation of 300,000 military reservists has impacted a third of companies, according to that same survey, the daily Kommersant said.

"The situation has continued to deteriorate, it's no surprise," said Dmitry Polevoy, director of investments at Locko Invest in Moscow.

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Worse to come?

Yet the Russian economy has so far survived Western sanctions better than many economists expected.

On November 8, the central bank predicted GDP would contract by 3.5 percent this year. The IMF and the World Bank are respectively estimating a fall in Russian GDP of 3.4 percent and 4.5 percent.

The resilience of the economy is due in large part to the surge in global energy prices following the offensive in Ukraine and a restrictive monetary policy.

After Russia was hit by Western sanctions, the central bank drastically raised the key rate from 9.5 percent to 20 percent in a bid to counter inflation and prop up the ruble.

The Bank of Russia quickly reduced it thereafter and last month left it at 7.5 percent in what Governor Elvira Nabiullina called a sign of "adaptation" by the economy to a "new reality".

But many analysts believe things are going to get worse for Russia's economy before they improve.