Mainstay Claims
At Mainstay Underwriting, we believe that claims are not just a consequence of insurance, they are the true test of its value. That’s why we treat claims as a central part of our offering, not an afterthought.
We operate exclusively through brokers, and our claims philosophy is built around transparency, responsiveness, and fairness. Our hybrid claims management model ensures that each claim is handled by the team best equipped to deliver results:
Whether handled internally or through our TPA partner, every claim is managed with care, clarity, and a commitment to delivering the best possible outcome for our broker partners and their clients.
Need to Lodge a Claim?
Complete the relevant Mainstay claim form from our Downloads section and email it to Claims@Mainstay.com.au.
Our team will review the information provided, acknowledge the claim and either commence handling the matter internally or appoint the appropriate specialist claims manager.
Property Claims After the 1st December 2025
From 1 December 2025, Mainstay Claims will manage all property claims. With over 90% of our claims being property related, and with dealerships & motor trades being a specialist focus of our business, we believe that we are best placed to handle these claims with the expertise and attention they require.
Our deep understanding of the unique needs within the dealership and motor trade sector ensures that you and your clients can have one conversation and know you're in safe hands. This streamlined approach brings confidence and clarity to the claims process, for brokers and clients alike.
Lodge your property claim:
Mainstay Liability Claims
Gallagher Bassett will manage all liability claims on our behalf. As Australia’s leading liability TPA, they bring a wealth of expertise in handling complex and sensitive claims with efficiency, fairness, and care.
Their specialised knowledge in liability risk ensures that brokers and clients receive clear guidance and professional support throughout the process. Whether it’s managing incidents, investigating circumstances, or coordinating with all parties involved, Gallagher Bassett’s proven approach gives confidence that claims are being resolved effectively.
To lodge a liability claim, please complete the relevant claim form available on our Downloads page. If you have any questions or need assistance, call our office and speak to one of our team, we’re always here to help.
Property Claims Prior to 1st December 2025
Steadfast Claims will continue to manage our property claims that were lodged prior to 1 December. They are a knowledgeable and experienced team who have served our brokers and their clients well.
However, as we continue to grow and refine our offering, we made the decision to transition our claims management to our internal Claims team. This move reflects our commitment to prioritising claims service as a key part of our broker and client experience, particularly in our specialist areas such as dealerships and motor trades.We’re confident this change will deliver a more tailored, efficient, and responsive claims process moving forward.
Lodge your property claim:
Frequently Asked Questions
- For policies that incept on or after the 1st of December 2025, the property claims are now managed by Mainstay Claims.
- For policies that incept before the 1st of December 2025, the property claims will remain with Steadfast Claims.
- Liability claims are handled by Gallagher Bassett.
- The quickest way is through our online portal. You’ll receive a claim number immediately.
- You can still download a claim form from our downloads menu and email us at Risk@Mainstay.com.au.
- Yes, brokers with a Wilbur account can lodge claims directly via their online portal for faster processing. Any issues please speak to us for assistance.