Sébastien Lecornu is set to present a belt-tightening 2027 budget featuring a public-sector wage freeze and targeted tax increases on income and VAT.
As Britain faces fiscal pressure, commentators are urging political parties to address the costly pension guarantee ahead of the next election.
The central bank held interest rates at 3.75% on Thursday but surprised markets with a shake-up of its quantitative tightening programme, including a plan to sell £146bn in gilts back to the Treasury.
With the budget approaching, debate intensifies over whether the government can continue to afford the state pension guarantee popular with millions of Britons.