There will be no immediate changes to cash indivisual savings accounts (Isas), the BBC understands.
Chancellor Rachel Reeves was widely expected to announce plans to reduce the £20,000 tax-free allowance.
The move was aimed at encouraging more investment in stocks and shares, which the goverment says it will still focus on.
“Our ambition is to ensure people’s hard-earned savings are delivering the best returns and driving more investment into the UK economy,” a Treasury spokesperson said.
The Treasury is expected to continue to talk to banks, building societies and investment firms about options for reform.
An Isa is a savings or investment product that is treated differently for tax purposes.
Any returns you make from an Isa are tax-free, but there is a limit to how much money you can put in each year.
The current £20,000 annual allowance can be used in one account or spread across multiple Isa products as you wish.
