Chancellor Philip Hammond has set 22 November as the date for his newly created autumn Budget.
He hailed it as an opportunity to "set out our thinking on how to keep the economy strong and resilient and fair - an economy that works for everyone".
It will be the first budget of its kind, after Mr Hammond used his inaugural Autumn Statement last year to scrap both the traditional speech and the spring Budget.
"No other major economy makes hundreds of tax changes twice a year and neither should we," he announced at the time.
"I will not make significant changes twice a year just for the sake of it."
It will also be the Conservatives' first Budget since Prime Minister Theresa May's election gamble backfired, depriving the Tories of a majority.