new british chancellor of the exchequer kwasi kwarteng walks outside number 10 downing street in london britain september 6 2022 reuterstoby melville london sept 20 reuters  britains new finance minister kwasi kwarteng should publish economic and fiscal forecasts from the independent budget watchdog if he announces tax changes in his upcoming fiscal update to parliament a committee of lawmakers said kwarteng is due to outline plans to help households and businesses through the coming months under the economic agenda of newlyinstalled prime minister liz truss investors are keen to hear details about the vast cost of the plans with estimates ranging between 100 billion and 200 billion pounds 115230 billion however the office for budget responsibility obr will not be publishing detailed forecasts next friday government sources said last week read more these forecasts are a vital indicator of the health of the nations finances and provide reassurance and confidence to international markets and investors said mel stride chair of the treasury committee which scrutinises the governments economic plans stride  a leading supporter of former finance minister rishi sunak in the conservative party contest to succeed boris johnson  said the economic outlook had soured since the obr last published forecasts in march there have been significant fiscal interventions since then and we are told there will be further significant interventions including major permanent tax cuts to be announced on friday stride said under these circumstances it is vital that an independent obr forecast is provided during the leadership contest sunak said trusss unfunded tax cuts would be inflationary while truss said sunaks increased payroll taxes and plan to raise corporation tax would make a recession more likely last month the obr said it could provide a partial forecast to go alongside a late september fiscal statement in addition to the full forecast that will be published with an annual budget due before the end of the year