Risk-attaching reinsurance can be a vital tool for primary insurers. Like other types of reinsurance (insurance for insurers), this helps manage losses, stabilize financial results, and expand underwriting capacity.
This is especially important for brokers operating in diverse markets, where they can use risk-attaching reinsurance and other types of treaties to enhance client trust and ensure optimal coverage.
In this article, we'll delve into the nuances of risk-attaching reinsurance for the benefit of international brokers and their clients.
Risk-attaching reinsurance is a reinsurance treaty that covers all insurance policies created during the contract period, even if claims arise after the treaty expires. This approach gives insurers clarity about which risks are reinsured, as coverage is determined by the policy’s start date rather than when a loss occurs.
This type of reinsurance is critical for brokers because it clarifies which policies are covered, making it easier to advise clients and structure effective risk management solutions.
Apart from providing the usual reinsurance benefits, the purpose of risk-attaching reinsurance is to provide a degree of certainty. This form of reinsurance can ensure that clients’ claims are protected, even for a loss occurring after the reinsurance contract ends. Such a treaty arrangement can lead to greater client trust and more reliable coverage planning.
Here is the step-by-step process when applying risk-attaching reinsurance:
The insurance company and reinsurer agree to a risk-attaching reinsurance treaty for a specific period.
During the contract period, the insurance company issues new insurance policies. These policies are covered by the reinsurance agreement.
Any policy that starts during the reinsurance treaty period is automatically included for reinsurance coverage, regardless of when a claim might arise.
If a claim comes up from one of these policies, the reinsurer is responsible for covering the claim. This applies even if the claim occurs after the reinsurance contract has ended.
The insurer identifies which claims are protected under the treaty, supporting clear and confident risk management strategies.
If catastrophic events lead to claims on policies issued during the treaty, the reinsurer covers those claims, helping maintain the insurer’s financial stability.
These are the main features of this type of reinsurance:
Reinsurance covers claims from all policies that begin during the treaty period, even if the loss occurs after the contract ends. This provides extended claims protection for long-tail risks.
Insurers and brokers know exactly which policies are protected, supporting effective risk management and planning.
Unlike loss-occurring reinsurance, which only covers claims from losses happening during the contract period, risk-attaching reinsurance focuses on the start date of the policy.
Risk-attaching reinsurance ensures claims from catastrophic events are covered if the policy was incepted during the treaty period, helping maintain financial stability.
Insurance brokers are advised to consider risk-attaching reinsurance whenever it’s appropriate for their clients’ needs and objectives. They can also look at the other common types of reinsurance.
Let’s suppose that an insurance company enters into a risk-attaching reinsurance treaty with a reinsurer for the calendar year 2025.
During this period, the insurer issues a property insurance policy to a client on June 1, 2025. According to the risk-attaching reinsurance agreement, any claims arising from this policy, regardless of when the loss occurs, will be covered by the reinsurer. This holds true even if the claim is made after the treaty expires on December 31, 2025.
So, for instance, if a claim arises from a fire in February 2026, the reinsurer is still responsible for covering that claim because the policy was incepted during the treaty period. This arrangement gives the insurance company certainty that all policies started within 2025 are protected by reinsurance.
Many leading global reinsurers provide risk-attaching reinsurance as part of their treaty offerings. They continue to support insurance companies in managing risk and covering claims from policies created during the contract period. Some of these reinsurers include:
Munich Re: One of the world’s largest reinsurers known for a broad portfolio of treaty reinsurance solutions, including risk-attaching structures
Swiss Re: Offers risk-attaching and other treaty reinsurance products for property, casualty, and specialty lines
Hannover Re: Provides risk-attaching reinsurance globally, supporting insurers with tailored treaty arrangements
SCOR: Delivers risk-attaching reinsurance for both life and non-life sectors, with a strong international presence
Lloyd’s of London: Through its syndicate system, Lloyd’s offers a variety of treaty reinsurance options, including risk-attaching coverage
Berkshire Hathaway: A major provider of treaty reinsurance, including risk-attaching agreements, for diverse insurance companies.
China Re: Supplies risk-attaching reinsurance solutions across Asia and other regions
Reinsurance Group of America (RGA): Specializes in life and health reinsurance, including risk-attaching treaties
Check out our list of the largest reinsurance companies in the US for more information.
Insurance brokers may consider this reinsurance treaty for its benefits, but like other reinsurance agreements, it also has its share of drawbacks. Let's go over some of them:
Insurers know exactly which policies are covered, as all policies incepted during the treaty period are included.
Claims arising after the treaty expires are still covered if the policy started within the contract period, offering security for long-tail risks.
Risk-attaching reinsurance provides certainty for insurers and brokers, supporting effective risk management and planning.
Risk-attaching treaties enable insurers to write more business confidently, knowing reinsurance will cover claims from incepted policies.
Reinsurers may face claims long after the treaty period ends, making it harder to predict and manage future liabilities.
Tracking which claims are covered can be more complex, especially for multi-year or overlapping treaties.
Catastrophic events affecting many incepted policies can lead to significant delayed claims for reinsurers.
Uncertainty about when claims will arise can make it harder for reinsurers to price risk accurately.
Risk-attaching reinsurance is often compared to loss-occurring reinsurance since both are common treaty reinsurance agreements. These treaties, however, define coverage boundaries in fundamentally different ways:
Risk-attaching reinsurance covers claims from all policies that begin during the treaty period, even if the claim arises after the contract ends.
Loss-occurring reinsurance covers all claims from losses that actually happen during the treaty period, regardless of when the policy was issued.
This comparison is important because it affects how insurers and reinsurers manage risk, determine which claims are covered, and plan for future liabilities. The choice between these structures influences certainty, claims administration, and financial planning for both parties.
| Feature | Risk-Attaching (Risk-Sharing) Reinsurance | Loss-Occurring Reinsurance |
|---|---|---|
| Coverage trigger | Policy inception date during treaty period | Loss event date during treaty period |
| Claims covered | Claims from policies that start within the contract period, even if loss occurs after treaty ends | Claims from losses that occur during the contract period, regardless of when the policy started |
| Duration of reinsurer’s liability | May extend beyond treaty period until all covered policies expire | Limited to losses occurring within the treaty period |
| Best suited for | Long-tail risks, liability, and complex lines | Short-tail risks, property, and catastrophe lines |
| Claims administration | Requires tracking policy inception dates | Requires tracking loss occurrence dates |
| Certainty for insurers | High certainty on which policies are covered | High certainty on which losses are covered |
Here's a look at how risk-attaching reinsurance works in other regions or markets. This can be especially useful for insurance brokers who operate in multinational agencies or have international clients. Note that these may not hold true in the long term, so remember to stay updated with any changes in regulations or trends in your market.
Regulation: Regulated by state and federal authorities in the US and OSFI in Canada. Risk-attaching treaties must comply with solvency and reserving standards. Regulators may require clear documentation of policy inception and treaty terms.
Accounting: US GAAP and Canadian accounting standards recognize liabilities for all policies incepted during the treaty period, even if claims are reported later. Insurers must track and report outstanding claims reserves for long-tail exposures.
Purpose: Commonly used for liability, professional indemnity, and specialty lines where claims may arise years after policy inception. Provides certainty for insurers and reinsurers on which risks are covered, aiding capital management and regulatory compliance.
Disclosure: Treaty terms and coverage periods are typically disclosed in annual reports and regulatory filings. Insurers must provide details on outstanding claims and reinsurance recoverables.
Regulation: Governed by the Prudential Regulation Authority (PRA) in the UK and Solvency II in the EU. The emphasis is on clear contract wording and alignment with solvency capital requirements.
Accounting: IFRS 17 and Solvency II frameworks require recognition of future liabilities from incepted policies. Insurers must maintain detailed records of policy and treaty dates for accurate reserving.
Purpose: Widely used for long-tail and complex risks, including casualty and specialty insurance.
It helps insurers meet stringent solvency and reserving standards.
Disclosure: Disclosure of reinsurance arrangements is required in financial statements and regulatory submissions. Insurers must report on the impact of risk-attaching treaties on reserves and capital.
Regulation: Regulated by local authorities (e.g., APRA in Australia, MAS in Singapore, FSA in Japan). Risk-attaching treaties must comply with local solvency and reporting requirements.
Accounting: Accounting standards vary, but most require recognition of liabilities for policies incepted during the treaty period. Insurers must track claims development and reinsurance recoveries over time.
Purpose: Used for both traditional and emerging risks, especially where legal and claims environments are evolving. It also supports insurers in managing growth and meeting capital adequacy standards.
Disclosure: Disclosure requirements differ by country, but insurers generally report on reinsurance arrangements in financial statements. Regulators may require additional detail on treaty structures and outstanding claims.
Regulation: Supervised by national insurance regulators, with growing alignment to international standards. Risk-attaching treaties must be documented and compliant with local laws.
Accounting: Accounting practices are evolving, with increasing adoption of IFRS or similar frameworks. Insurers are expected to recognize liabilities for incepted policies and report on reinsurance recoverables.
Purpose: Used to manage catastrophe, liability, and specialty risks in markets with developing insurance sectors. Risk-attaching reinsurance provides clarity and stability for insurers expanding their portfolios.
Disclosure: Disclosure practices are improving, with more insurers providing details on reinsurance in annual reports. Regulatory filings may require information on treaty terms and claims development.
Regulation: Regulated by national insurance authorities (e.g., Insurance Authority in the UAE, Saudi Central Bank in Saudi Arabia). Increasing alignment with international standards such as IFRS 17 and Solvency II principles. Risk-attaching treaties must be clearly documented and comply with local regulatory requirements.
Accounting: Many countries are transitioning to IFRS 17, which requires recognition of liabilities for all policies incepted during the treaty period. Insurers must maintain accurate records of policy inception and treaty terms to ensure proper reserving and reporting.
Purpose: Used for both conventional and Takaful (Islamic insurance) business, especially in lines with long-tail exposures such as liability and engineering. Risk-attaching treaties provide clarity for insurers and reinsurers in managing risk and meeting capital adequacy requirements in a developing and diversifying insurance market.
Disclosure: Disclosure requirements are strengthening, with regulators increasingly requiring insurers to report on reinsurance arrangements in financial statements and regulatory filings. Insurers must provide details on the impact of risk-attaching treaties on reserves and claims development, supporting transparency and market confidence.
Insurance brokers can use risk-attaching reinsurance by advising insurers to adopt this form of treaty structure when they need clear coverage for policies made during a specific period. This is especially useful for long-tail or complex risks.
By recommending risk-attaching reinsurance, brokers can help insurers better manage future liabilities for their clients. They can also ensure that claims from covered policies are honored even after the treaty expires and support compliance with local regulatory and capital requirements.
This approach enables brokers to deliver tailored risk management solutions, build client trust, and facilitate more predictable financial planning for insurers operating in diverse markets.
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