About us
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One Underwriting Pty Limited is an underwriting agency and a wholly owned subsidiary of Aon Australia Limited. We specialise in industry specific and product specific solutions which are tailored for the needs of the Australian market. We service over 250 brokers throughout Australia and have done for over 30 years.

One Underwriting acts as Managing General Agent (MGA) of a number of global carriers and is authorised to transact insurance business under a Delegated Authority.

Our personalised and professional services are backed by a highly skilled underwriting team dedicated to developing and adding value to your brokerage business.

Supporting our clients

We know our clients may find themselves in circumstances, at different times in their lives, where they need extra support.

Aon’s Family Violence Policy

Aon is committed to managing clients who are experiencing family violence with empathy, sensitivity and with the utmost consideration to our client’s security and individual financial circumstances. We recognise that family violence is a serious and prevalent occurrence in Australian society. We aim to provide clients affected with entitlements to safe, supportive, timely and flexible assistance.

Download a copy of Aon’s Family Violence Policy

Professional support services
There are a number of free external support services available if you’re facing challenging personal circumstances and need help. The following services are available to all Australians:


Support Service Services provided Contact details
National Debt Line Provides access to a local financial advisor. 1800 007 007
9.30am to 4.30pm, Monday to Friday
Translating and Interpreting Services (TIS) TIS National is a 24/07 interpreting service for people who do not speak English and for agencies and businesses that need to communicate with their non-English speaking clients. 13 14 50
Services Australia Government services available for both students and older Australians. https://www.servicesaustralia.gov.au
Lifeline 24-hour support for anyone across Australia experiencing a personal crisis or thinking about suicide. 13 11 14 (24-hour crisis support)
National Relay Service (NRS) NRS is an Australia wide telephone access service available to customers who are deaf or have a hearing or speech impediment. Voice: 1300 555 727
TTY: 133 677
SMS: 0432 677 767
1800 Respect 24-hour hotline for any Australian who has experienced, or is at risk of, family and domestic violence and/or sexual assault. 1800 737 732
Women's Legal Services Australia A national network of community legal centres specialising in women's legal issues. http://www.wlsa.org.au/
Aboriginal Family Domestic Violence Hotline A dedicated contact line for Aboriginal victims of crime who would like information on victims' rights, how to access counselling and financial assistance. 1800 019 123
National Aboriginal Community Controlled Health Organisation National peak body representing Aboriginal Community Controlled Health Services across the country on Aboriginal health and wellbeing issues. https://www.naccho.org.au/


Company History

Let's Talk

We love hearing from you and we’re ready to help, so pick up the phone and speak to a real person. 1300 000 663 

Alternatively use the form below to send us a message and we’ll be in contact as soon as we can.