The world’s richest man took aim at Britain under Labour in a fresh attack.
Elon Musk has been locked in a feud with Keir Starmer.
Elon Musk warned that “very few” businesses want to invest in Sir Keir Starmer’s Britain.
The tech billionaire was responding to calls from Scottish politicians for Tesla to open a new giga-factory north of the border.
Mr Musk wrote in X: “Very few companies will be willing to invest in the UK with the current administration.”
This is the latest criticism from the Tesla owner, who has been embroiled in an ongoing war of words with the Prime Minister.
Sir Keir made economic growth the first of five “missions” in Government.
However, he has faced a widespread backlash over his tax-hiking Budget, and official figures published just before Christmas showed no economic growth between July and September.
Ms Musk’s comments come after Ash Regan, the Holyrood leader of the nationalist party Alba, wrote to him urging him to establish a base in Scotland.
She said: “The case for a gigafactory in Scotland is strong. We have great access by land, air and sea to the world and are perfectly placed to not only serve the Scottish market but also the rest of the UK and Ireland.
“If Elon Musk took up my offer to explore expansion into Scotland it would be a game changer for our manufacturing base, bring billions to our economy and create thousands of highly skilled and well-paid jobs.”
Mr Musk, who is a close ally of Reform leader Nigel Farage, has been an outspoken critic of the PM.
He branded him “two-tier Keir” over the punishments handed out to those involved in far-right riots over the summer.
The X owner questioned whether the country was “Britain or the Soviet Union” after a man was apparently arrested over Facebook comments.
He claimed “civil war is inevitable” in Britain, which prompted No 10 to hit back and insist there was “no justification” for the comments.
And last month, he said Britain was going “full Stalin” under Labour amid the inheritance tax raid on farmers.
It comes amid reports that Mr Musk, who has been tasked by US president-elect Donald Trump with tackling government waste, could donate to Reform UK.