Homeowners struggling to wage their mortgages amid rising involvement rates should beryllium capable to use for a £300-a-month grant, the Lib Dems person said.
Under the party's plan, the assistance would beryllium disposable to radical whose owe payments had risen by much than 10%.
It could beryllium paid for by reversing taxation cuts for banks, the enactment has said.
Sir Ed Davey said: "No household should look losing their location due to the fact that of the Conservative's reckless mismanagement of the economy."
The Liberal Democrat person volition springiness a code successful London connected Sunday, aft the decease of Queen Elizabeth II led to his party's yearly league being cancelled successful September.
He volition onslaught the Conservatives for readying taxation rises and cuts to nationalist services, likening ministers to "bank robbers asking for a indebtedness to bargain the getaway car".
Chancellor Jeremy Hunt is owed to present an autumn fund connected 17 November, but has already warned of "eye-wateringly hard decisions".
The determination to clasp a fund was taken aft the taxation plans of Liz Truss sparked turmoil successful fiscal markets.
Following a backlash, she was forced to sack her chancellor and reverse her proposals. She aboriginal resigned arsenic premier minister, to beryllium replaced by Rishi Sunak.
Sir Ed argued that Conservative actions had "added hundreds [of pounds] to people's monthly mortgages".
"The authorities has a work to measurement successful and hole their ain mess, by providing grants to those struggling to spend eye-watering owe hikes."
Sir Ed volition besides usage his code to onslaught Mr Sunak's re-appointment of Suella Braverman arsenic location secretary, little than a week aft she had to resign for breaking information information rules.
"Johnson-like integrity, Johnson-like judgement - Nadhim Zahawi said it was clip for Boris 2.0. With Rishi Sunak, it looks similar helium got his wish," helium is expected to say.
Looking up to the Liberal Democrats' wide predetermination prospects, Sir Ed volition reason that his enactment is well-positioned to triumph seats successful accepted Conservative heartlands, dubbed "the bluish wall".
In the past year, the enactment has had occurrence beating the Tories successful by-elections successful Shropshire, Buckinghamshire and Devon. However it remains 1 of the smaller parties astatine Westminster with conscionable 14 MPs.
Under the Liberal Democrat's owe extortion fund, grants would beryllium offered to homeowners to support them from losing their homes oregon falling into arrears.
The enactment estimates this would outgo £3bn and says it could beryllium paid for by reversing cuts to the slope levy and slope surcharge.
The mean involvement complaint charged by owe lenders has deed its highest level for 14 years.
A homeowner is considered to beryllium successful arrears if they miss 2 oregon much months' repayments, However, lenders are required to marque tenable attempts to scope an statement with those struggling to conscionable their payments.