APRA Finalises Reinsurance Rule Changes Letting Australian Insurers Use Catastrophe Bonds Without a Reinstatement, Cutting Approval Requirements From January 2027

On July 7, 2026, the Australian Prudential Regulation Authority (APRA) published a response paper finalising amendments to the framework that governs how general insurers use reinsurance. The headline change is that insurers are being given easier access to alternative reinsurance, a category that includes catastrophe bonds and other insurance-linked securities, which transfer risk to capital-market investors rather than to a traditional reinsurer. The final prudential standards, guidance and reporting standards take effect on January 1, 2027. This article draws on APRA's response paper, with a law-firm summary of the same package from Regulation Tomorrow, and it separates what the regulator has finalised from what it has not.

How the package came about

APRA first sought feedback on the direction of the review in November 2024. In October 2025 it consulted on draft prudential standards, guidance and reporting standards and received seven submissions. According to the response paper, respondents broadly supported the proposals and asked for some clarifications, which APRA has partly addressed. Regulation Tomorrow's summary says APRA proceeded with the proposals as consulted on, with minor clarifications. The instruments affected include the prudential standards GPS 115 (Insurance Risk Charge), GPS 116 (Insurance Concentration Risk Charge), GPS 230 (Reinsurance Management) and CPS 320 (Actuarial and Related Matters), the practice guides GPG 116 and GPG 245, and a set of reporting standards.

The reinstatement change

A reinstatement is a feature of traditional catastrophe reinsurance under which cover that is used up by a loss is restored, usually for an additional premium, so that the insurer is protected against a second event in the same period. Catastrophe bonds usually do not offer this: once a bond pays out, the protection is used up.

The final rules say a reinstatement is not required for arrangements where one is typically unavailable. APRA's guidance states that "catastrophe bonds are generally considered arrangements where a reinstatement is not typically available." In place of the requirement, insurers must decide how they would manage the risk of not having a reinstatement, including how cover would be restored where relevant, and record the approach in their Reinsurance Management Strategy, or ReMS. For APRA's Natural Perils Horizontal Requirement, reinstatement costs must be included if the insurer assumes cover will be reinstated. They are not required in the Natural Perils Vertical Requirement for arrangements that have no typical reinstatement.

Capital and the 1-in-200 standard

APRA says it judged the risk of a material shift in market behaviour to be low and did not add a capital charge for alternative reinsurance. For reinsurance that does not cover all perils and regions, such as single-peril cover, APRA makes a net whole-of-portfolio approach mandatory. APRA says this preserves the existing level of protection against a 1-in-200-year all-perils event. In other words, the regulator is making it easier to use alternative products while insisting that an insurer's overall protection is judged across its whole portfolio, not product by product.

Less need for APRA approval

A second theme is efficiency. For many arrangements, the Appointed Actuary (AA) will determine the capital treatment by default. The response paper gives examples: adverse development cover, which protects against claims on past business turning out worse than expected, top-and-drop cover, and single-peril catastrophe bonds with an indemnity trigger. APRA approval is still needed for complex, material arrangements, including those with parametric triggers, which pay on a measured event such as wind speed rather than on the insurer's actual losses, industry loss warranties and certain stop-loss covers. APRA will not set a numerical materiality threshold; insurers and appointed actuaries may refer to guidance from the Actuaries Institute. Simple arrangements such as traditional quota share and catastrophe excess-of-loss cover need no AA or APRA involvement.

Other changes to GPS 230 and related standards

Several smaller changes are worth noting. Disputes under reinsurance contracts must be arbitrated in Australia, and reinsurance payments must be made in Australia. The requirement that contracts be signed and stamped is replaced by a requirement that they be legally binding between all parties. Material catastrophe modelling information must be included in the Reinsurance Arrangement Statement (ReAS), with supporting detail held separately for APRA on request, and insurers do not need to resubmit their ReAS solely because of the changes; changes should appear in the next scheduled submission. GPS 116 now clarifies that allowances for non-modelled risk should capture demand surge, underinsurance and policy features that increase loss.

What was not adopted

One suggestion was not taken up now. An eight-week collateral grace period had been suggested. APRA did not adopt it in this package and says it will consult on the idea through its 2026 minor prudential framework updates, so it remains open.

Timing and reporting

The new framework applies from January 1, 2027. Updated reporting forms are planned for the APRA Connect Test environment in September 2026, with taxonomy artefacts released before then.

What it means

For insurers, the changes lower regulatory friction for catastrophe bonds and similar structures, and reduce the number of arrangements that need APRA approval, but they add documentation: an insurer using a bond without a reinstatement must show it has thought about the gap. For policyholders, the stated objective is to give insurers flexibility while keeping appropriate safeguards. Whether the changes will lower reinsurance costs, or lead to more Australian cat bond issuance, is not something the response paper claims, and this article does not predict. The effect will depend on market conditions and on how insurers and investors respond after 2027. Readers who need the precise wording should consult the final instruments on APRA's website. This article is general information and not legal advice.