Wait. Don’t buy that television just yet.

State lawmakers are expected to pass legislation this week that would lift the state’s 6.25 percent sales tax for the weekend of Aug. 10-11. The House is expected to approve the bill today and the Senate plans to follow suit after the House votes. Governor Deval Patrick has said he would then sign into law the sales-tax holiday.

The holiday has proved popular with lawmakers, consumers and retailers in recent years, although some economists say it doesn’t stimulate consumer spending, it merely shifts the timing of it. The holiday also costs the state about $20 million in revenue.

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Over the last nine years, Massachusetts has approved a weekend without the sales tax in every year except 2009.