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March 3 (Reuters) - Best Buy BBY.N beat Wall Street estimates for fourth-quarter profit on Tuesday, helped by the top U.S. electronics retailer's efforts to rein in costs amid uneven demand during the all-important holiday shopping season.

Shares of the company surged about 12% in premarket trading. The stock had declined nearly 8% so far this year.

Best Buy has been under pressure as Americans battling rising cost-of-living linked to tariffs and an uncertain labor market delayed big-ticket purchases.

"Our data sources show our overall market share was at least flat, pointing to slightly softer customer demand for our industry during the holiday quarter," said CEO Corie Barry.

However, the company managed to trim costs, including lowering expenses at Best Buy Health in the U.S.

Quarterly cost of sales came in at $10.93 billion in the fourth quarter, down from $11.03 billion a year earlier.

On an adjusted basis, the company posted quarterly profit of $2.61 per share, compared with analysts' estimates of $2.47, according to data compiled by LSEG.

It projected full-year comparable sales to be down 1% to up 1%, compared with analysts' estimates of a 1.63% rise.