Growth Guarantee Scheme: The Treasury Will Stand Behind the Loans British Banks Cannot Price

A bank can lend against a warehouse because a bank can sell a warehouse. It cannot sell a patent, a codebase, or a drug trial two years short of approval, which is why the companies Britain says it wants most are the ones its lenders find hardest to fund. The Growth Guarantee Scheme, expanded by HM Treasury on 13 July 2026, is the government's answer to that, and the answer is to stand behind the loan rather than to change how the loan is judged.

The package arrives the day before the Chancellor's Mansion House speech on 14 July. The Treasury puts the annual shortfall between what small and medium-sized enterprises (SMEs) want to borrow and what they can actually raise at somewhere between £1.6 billion and £4.1 billion.

Why a guarantee exists at all

The scheme does not lend public money. The British Business Bank covers 70% of a commercial lender's losses on loans of up to £2 million, which lowers the risk the lender carries on its own book, and the Treasury estimates that every £1 committed supports around £10 of bank lending. Since 2022 the scheme has delivered more than £3.7 billion of financing, with £2.5 billion of that reaching firms outside London and the South East. The mechanism exists because the underwriting has not changed, and small firms are still assessed by a system built to value things that can be repossessed, a pattern visible wherever small businesses sit outside the financial infrastructure built around them.

What actually changes

Under the Treasury's announcement, the scheme scales to support an additional £2 billion of SME lending a year by 2028/29, taking the annual total to £3.35 billion against £1.35 billion today. The British Business Bank expects that to reach 20,000 businesses a year rather than the 8,000 it currently supports. Two smaller adjustments matter more than they look: repayment terms stretch from six years to ten on loans up to £1.1 million, and the turnover ceiling for an eligible business rises from £45 million to £54 million.

The longer term does real work. A six-year repayment window suits a company buying a van, and it forces a company building a product to service the debt before the product earns anything.

The problem with an idea as collateral

Separately, the British Business Bank has allocated £500 million of capacity within its ENABLE Guarantee programme to firms whose principal assets are intellectual property rather than property. The Treasury names creative industries and life sciences, and it links the measure to Britain's sovereign AI ambitions, which is a candid admission of the underlying problem. A country cannot build a research-led economy on a credit system that can only price bricks. Guaranteeing those loans removes the need for any bank to learn how to value a patent.

The lenders who pick up the refusals

The government is also backing Community Development Finance Institutions (CDFIs), the lenders that serve businesses the mainstream turns away. Seven have been accredited under the British Business Bank's Community ENABLE Funding programme, with nearly £120 million of public money committed and an ambition to grow the programme to at least £500 million.

Supporters including JPMorganChase have committed £10 million of philanthropic funding in total, alongside financial support from the US bank BNY, and the community finance effort as a whole is aimed at an additional £1 billion of SME lending over five years. Public money moving through a channel private banks would rather not use has an obvious precedent in how banks treat state backstops, where the stigma tends to attach to whoever accepts the help.

The one measure that changes the decision

One reform in the package touches how a lending decision actually gets made. The government intends to accelerate Open Finance in the United Kingdom with an initial focus on SME lending, extending the data-sharing principle beyond the payment accounts already covered by open banking and into the wider financial life of a business. A lender able to see a company's real revenue, invoices and payment behaviour has less reason to demand a building as security, and this is the point at which financial technology stops being a distribution channel and becomes the underwriting itself.

Everything announced on 13 July makes it cheaper for a bank to be wrong about a small business. The single measure that would let a bank be right, Open Finance for SME lending, does not reach consultation until 2027, and the guarantees start now.

Editor's note

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