The chancellor, John Healey, will include plans for the borrowing facility in his budget statement on Wednesday, with the scheme drawn up in collaboration with mayors over the next two years. Regional mayors have long complained that they are constrained by limited borrowing power, in contrast to local authorities in the US and some European countries, which commonly issue their own bonds.
The package also includes an initial £285m of "good growth" funding next year, to be spent on local leaders' priorities such as housing, transport links or high street regeneration. Amid Treasury fears about whether some local authorities have the capacity to administer increasingly large budgets, Healey will announce £150m of support to help them scale up.
Prime minister Andy Burnham said the plans would mean local leaders no longer needed to come to the Treasury for approval for each individual project. "I'm calling time on local leaders going cap in hand to Westminster. That is no way to run a country. When I became prime minister, I said that if a decision can be made closer to home, it should be."
Healey said: "Mayors and local leaders know what their communities need to grow, which is why we are giving them more money, more power and more capacity to get projects moving, build homes and make the right decisions for their areas."
The £285m funding is intended to tide local authorities over until 2028, when some income tax revenue will be handed directly to their areas, an idea first mooted by Healey's predecessor, Rachel Reeves. More details are due at the budget.
Alongside the devolution plans, the budget is expected to include support for poorer households hit by rising energy costs and modest tax rises, including on banks. Healey will also set out how he plans to fully fund the four-year defence investment plan announced in the final days of Keir Starmer's premiership. He is not expected to say when the UK will commit to spending 3% of GDP on defence, with that decision likely delayed until a spending review next year.