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.
"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."