Philip Hammond will give his first Autumn Statement on November 23.
The Chancellor has previously warned that he could use the mini-Budget to "reset" tax and spending policy if there is a downturn in the economy.
Mr Hammond revealed the date as he appeared before peers on the House of Lords Economic Affairs committee.
He said: "The Autumn Statement will set out the government's economic and fiscal plans based on the latest forecasts from the Office for Budget Responsibility.
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"In the run up to the Autumn Statement I will be engaging with Britain's business leaders and employee representatives through a series of industry round tables, meetings and visits."