NS&I (National Savings and Investments) is a state-owned savings bank in the United Kingdom that traces its history back to 1861. Originally known as the Post Office Savings Bank, it was founded to provide ordinary working people with a way to save. Today, it operates as both a non-ministerial government department and an executive agency of HM Treasury. NS&I's primary goal is to attract funds from individual savers in the UK to finance the government's deficit. As of 2024, NS&I managed around £231 billion in savings belonging to approximately 24 million customers.
NS&I offers various savings and investment products, specializing in tax-free and income-generating options. These include Premium Bonds, Direct ISAs, Junior ISAs, Income Bonds, and Direct Saver accounts. A key feature of NS&I is that all deposits are 100% guaranteed by HM Treasury. The Chief Executive of NS&I is Dax Harkins, who was appointed on April 12, 2023. Recent news includes the announcement of February Premium Bonds prize winners and adjustments to interest rates on selected variable products and fixed-term bonds. In 2025, Premium Bonds holders won over £4.9 billion in prizes.