About the IUA

Frequently Asked Questions


Who can be a member of the IUA?

The IUA is a membership organisation for companies, not individuals. Member companies are fully authorised international wholesale insurance and reinsurance businesses operating in or through London. For more information on membership visit Joining the IUA.

What is the London company market’s premium income?

The IUA publishes a London Company Market Statistics Report surveying premium income which can be downloaded from the documents section of this website. In 2019 the overall intellectual and economic premium total was £27.633bn. For more granular data, the IUA also produces for its members underwriting statistics showing premiums received and claims paid by companies using Xchanging Ins-sure processing services. However, a number of member companies do not use Xchanging Ins-sure for processing their business and these statistics, therefore, do not represent the total size of the London company market.

What is the capacity of the London company market?

It is impossible to measure exactly the capacity of IUA members for reasons similar to those encountered trying to measure premium income. As part of large international groups many IUA members operate in London as a branch. Therefore, the capital of the whole group could be used to write London business and is not necessarily identified and allocated specifically to the London Market.
In addition, the capability of international insurance companies to accept risk is governed not solely by location and their premium income, but also the size and structure of their global reinsurance programme. Thus, on a worldwide basis, IUA members potentially offer access to capital running into many hundreds of billions of dollars.

What is the difference between the International Underwriting Association (IUA) and the Association of British Insurers (ABI)?

The IUA represents the company wholesale insurance and reinsurance market in London. The ABI’s focus is much more UK-centric, looking at life and pensions and retail and commercial products.

What is the difference between the IUA and Lloyd’s?

The IUA is an association representing companies operating in London, but outside of the Lloyd’s market. We do not have any regulatory authority over our members.
Lloyd's is a marketplace comprised of a society of members, both corporate and individual, that accept insurance risks through their participation in competing syndicates. The Lloyd’s Franchise Board and Lloyd’s Council are responsible for commercially managing the Lloyd’s market.

Can the IUA comment on premium rates and/or renewal negotiations?

No. The IUA, as a trade and market association takes compliance with all eligible competition law very seriously and as such has no involvement or authority over the commercial pricing decisions of its member companies.

The London Market

The 'London Market' is a distinct, separate part of the UK insurance and reinsurance industry centred on the City of London. It comprises insurance and reinsurance companies, Lloyd's syndicates, P&I clubs, and brokers.

Whilst there is no watertight definition of the market, there is general agreement that the core of its activity is the conduct of internationally traded insurance and reinsurance business. This is mostly non-life (general) insurance and reinsurance, with an increasing emphasis on high-exposure risks. There is also, however, an amount of life reinsurance activity in London.

Despite the growth of other international centres, London retains its position as the world's leading international insurance and reinsurance market. There may be far fewer companies operating in the market than in the late 1980s, but their average size has increased, and so has the overall level of business.

The London Market's international character is reflected not only in the sources of its business but also in the nationalities of its participants and their ultimate owners. A majority of the companies underwriting in the London Market are foreign or foreign-owned. It is still the only centre in which all of the world's 20 largest insurance groups are represented.

Insurance in London began well over 400 years ago, and gained prominence in the 19th century, reflecting Britain's then dominant role in shipping and shipbuilding. As the British Empire expanded London developed into a dominant global financial centre. For most of this period, the marine insurance industry was dominated by Lloyd's, but a flourishing company sector also developed and later expanded to embrace emerging aviation and energy markets. By the 1980s, the company non-marine sector had also grown to match the Lloyd's market, boosted by an influx of overseas capital.

An important competitive strength of the London Market lies in the number, diversity and expertise of the insurers competing here. Brokers can find the capacity and expertise required for the underwriting of virtually any type of risk. Brokers control most of the business placed in the market. London is largely a subscription market where risks are shared. A key feature is the presence of highly skilled 'lead underwriters' whose judgements on premium rates to be charged for different risks are supported by other insurers in London and indeed other markets across the globe.

Another important attribute is geographical concentration with many insurers and intermediaries located in close vicinity within the City of London. Thus, brokers can know personally the strengths, specialities and reputations of the underwriters and the insurers with whom they deal, and readily tap the combined underwriting capacity for all sectors of the market. Similarly buyers can meet insurers, and market information is spread rapidly among all participants.

The London Market also contains an unrivalled pool of service providers, for example law firms, IT support and professional bodies such as the IUA, and a robust but effective regulatory environment. All of these attributes contribute to an enviable reputation for innovation and security.

IUA members

Employees of IUA member companies can sign in or register for access to an extensive range of research and market intelligence.


Read the latest news statement by the International Underwriting Association

Finding member companies

There are three categories of IUA membership which are outlined below. Full lists of IUA member companies may be viewed by clicking on the links below.