Sovereign Infrastructure Guarantee

The UK Infrastructure Bank offers guarantees to qualifying infrastructure projects backed by the Sovereign Infrastructure Guarantee (SIG). The SIG is an agreement between the Bank and HM Treasury that will allow the Bank to issue sovereign-equivalent guarantees to qualifying projects, enabling us to crowd-in private sector investment, reduce barriers to investment, aid the scaling of proven technologies, increase market capacity and address liquidity issues.

£10bn of the Bank’s £22bn of financial capacity has been allocated to providing guarantees, forming a key part of the Bank's offering to infrastructure projects. The Bank will consider offering guarantees on a case-by-case basis, supporting proposals that fall within the scope of our mandate and Investment Principles.

Sector comment

Moody’s have provided a Sector Comment on the Bank’s guarantee arrangement.



UKIB Guarantee documentation




If you have a project that you would like to discuss with us, please get in touch.