Knowing and managing the complexities of risk transfer is a core responsibility for US insurance brokers, especially as clients seek tailored solutions in a changing marketplace. One approach is using facultative-obligatory reinsurance, a hybrid of facultative arrangements with the consistency of treaty reinsurance.
But what is facultative obligatory reinsurance, and how does it work? In this guide, we explore the intricacies of facultative-obligatory reinsurance, present real-world examples to demonstrate its application, and discuss essential related topics.
Facultative obligatory reinsurance, aka “fac-oblig,” is a specialized form of reinsurance agreement that combines elements of both facultative and treaty reinsurance. In this arrangement, the ceding insurer has the option, but not the obligation, to cede individual risks that exceed its retention limit to the reinsurer.
Once the primary insurer decides to cede a risk under the agreed terms and conditions, the reinsurer is contractually obliged to accept that portion of the risks.
There is a process by which US brokers help insurers manage risk exposure efficiently while maintaining flexibility and certainty in reinsurance placements. Here’s an overview of how facultative obligatory reinsurance works for US brokers, via a step-by-step process:
First, the primary or ceding insurer reviews its portfolio and identifies individual risks. These are often large, unusual, or exceeding its retention limit, and are not fully covered by existing treaty reinsurance.
The insurer engages a reinsurance broker to advise on risk transfer options. The broker evaluates whether facultative obligatory reinsurance is suitable, considering the insurer’s risk appetite and the nature of the exposures.
The broker works with both the insurer and reinsurer to negotiate the terms and conditions of the facultative obligatory reinsurance contract. This includes:
As the insurer underwrites new policies, it decides which individual risks to cede under the facultative obligatory agreement. For each risk:
Once a risk is ceded, the reinsurer assumes liability for losses above the insurer’s retention limit, up to the agreed coverage limit. The insurer pays the reinsurer its share of the premium for the ceded risk.
The broker facilitates communication between the insurer and reinsurer throughout the policy period. This includes:
At the end of the contract period, the broker helps the insurer and reinsurer review the performance of the facultative obligatory reinsurance arrangement. They may renegotiate terms or adjust the agreement based on claims experience and changing risk profiles.
Fac-oblig reinsurance differs from traditional reinsurance models, typically facultative and treaty reinsurance, in these key aspects:
In facultative obligatory reinsurance, the ceding insurer can choose which individual risks to cede, but once selected, the reinsurer must accept them.
In traditional facultative reinsurance, both the insurer and reinsurer negotiate and agree on each risk separately, with no obligation for either party to participate. This is also in contrast to treaty reinsurance, wherein all risks within a specified class are automatically ceded and accepted under the reinsurance contract.
Fac-oblig reinsurance offers more flexibility than treaty reinsurance, as the primary insurer is not required to cede every risk in a class. However, it is more automatic than facultative reinsurance, since the reinsurer cannot decline risks that the insurer chooses to cede under the agreement.
This form of reinsurance allows insurance companies to manage their risk exposure more selectively. Insurers transfer only those risks that exceed their retention limit or that they consider appropriate, while still benefiting from the certainty of acceptance by the reinsurer.
The reinsurer’s obligation to accept risks under facultative obligatory arrangements distinguishes it from facultative reinsurance, where no such obligation exists. This aligns it partly with treaty reinsurance, where acceptance is automatic for all covered risks.
Check out our guide to the common types of reinsurance so you can make other comparisons to facultative obligatory reinsurance.
Here’s a rundown of the applicable situations and risks:
When an insurer underwrites a property (such as a skyscraper, stadium, or industrial plant) that exceeds the limits of its standard treaty reinsurance, facultative obligatory reinsurance allows the insurer to cede these large, individual risks automatically.
Another good example of this sort of risk is environmental impairment liability for chemical plants or hazardous waste sites. In this case, their risk profile is unique and not easily pooled with standard treaty business, so they can benefit from fac-oblig reinsurance.
New, emergent risks like cyber risks are rapidly evolving and can involve catastrophic, unpredictable losses. In this case, insurers often use facultative obligatory reinsurance to cover large, individual cyber policies that fall outside treaty terms.
Fac-oblig reinsurance is also applicable when insurers launch new or experimental insurance products (e.g., coverage for new technologies or industries). In ordinary situations, treaty reinsurance may not be available or adequate, so facultative obligatory arrangements fill these capacity gaps.
Risks that are too large for the current treaty’s capacity can warrant the use of facultative obligatory reinsurance. Similarly, if the risk falls outside the treaty’s scope due to exclusions or sublimits, fac-oblig reinsurance can be used to automatically cede the excess portion.
There are hundreds of reinsurance companies that offer this and other types of reinsurance in the US. Some of these reinsurers are major players known for their strong capacity, financial expertise, and active participation in the US reinsurance market:
A subsidiary of Munich Re, it is one of the world’s largest reinsurers, with extensive facultative and treaty reinsurance solutions for US insurers.
The US branch of Swiss Re, this reinsurer provides facultative obligatory, treaty, and specialty reinsurance products across multiple lines.
Hannover Re is a global reinsurance group with a strong US presence, offering facultative obligatory reinsurance for property, casualty, and specialty risks.
Headquartered in New Jersey, Everest Re is a leading provider of facultative and treaty reinsurance, with a dedicated facultative division.
Part of Berkshire Hathaway, whose CEO is world-famous “Oracle of Omaha” Warren Buffett. This group offers a wide range of facultative and treaty reinsurance solutions, including facultative obligatory contracts.
With a significant US footprint, PartnerRe offers treaty and facultative obligatory reinsurance for property, casualty, and specialty lines.
AXA XL’s reinsurance division is a major player in the US, providing facultative obligatory and other reinsurance products.
The US branch of SCOR, a top global reinsurer, offers facultative obligatory reinsurance for various insurance companies.
Based in New York, TransRe is known for its facultative and treaty reinsurance capabilities, including facultative obligatory arrangements.
A Berkshire Hathaway company, Gen Re is a leading direct reinsurer in the US, providing facultative obligatory and treaty reinsurance.
The availability and appetite of these reinsurers for fac-oblig arrangements can vary, depending on the company decisions, line of business, and market cycle. While these are leading reinsurers with fac-oblig capabilities, their acceptance of these treaties may be subject to current market conditions.
Here are some real-life cases where facultative obligatory reinsurance was applied recently.
Recent reports from the International Underwriting Association (IUA) and other industry bodies highlight that facultative and facultative obligatory contracts remain a significant part of the reinsurance industry.
This is especially true in the US and London markets.
While treaty business has grown, direct and facultative contracts (including facultative obligatory) still account for a substantial share of premiums. This activity supports established and new market participants in managing risk and stabilizing financial results.
Aggregate property reinsurance, which often uses facultative obligatory mechanisms, has made a return to the US market in 2025. According to Gallagher Re, aggregate coverage is being used by US carriers to fill gaps left by conventional occurrence excess-of-loss protection, especially for catastrophe risks such as hurricanes and earthquakes.
These structures provide automatic coverage for certain layers of risk, blending facultative and obligatory features to offer flexibility and capacity.
Facultative quota-share reinsurance, a form of fac-oblig reinsurance, has been used for environmental impairment liability policies, especially for large industrial projects in the US.
For example, when an insurer covers a chemical plant’s environmental liability, it may cede a fixed percentage of a single, high-value policy to a facultative reinsurer to manage its exposure and capital requirements.
Key details:
This approach is often used when treaty capacity is insufficient for large or unique environmental risks.
Facultative obligatory solutions provide tailored risk transfer for non-standard exposures.
This reinsurance agreement has its share of benefits and drawbacks. Apart from ensuring that the fac-oblig reinsurance agreement is appropriate for the unique circumstances and risks, US brokers should consider these factors before deciding to use them.
The ceding company can choose which risks to cede, offering more control compared to standard treaty reinsurance.
Once the ceding insurer decides to cede a risk within the agreed parameters, the reinsurer must accept it, ensuring capacity is always available for qualifying risks.
Ideal for risks that are too large, unusual, or complex for treaty reinsurance, such as high-value properties or emerging risks (e.g., cyber, environmental liability).
Enables insurers to transfer specific high-severity risks off their balance sheet, supporting regulatory capital requirements and potentially improving financial ratings.
Fac-oblig reinsurance reduces the administrative burden of negotiating each risk individually, as the reinsurer is pre-committed to accept qualifying risks.
The ceding insurer may be tempted to cede only the most challenging or unattractive risks, leaving the reinsurer with a less balanced portfolio.
The reinsurer must accept all risks within the agreed scope, which may limit their ability to underwrite or price each risk individually.
While more efficient than pure facultative, fac-oblig reinsurance still requires clear protocols for risk eligibility, documentation, and communication between parties.
For portfolios with many similar, low-severity risks, standard treaty reinsurance is typically more cost-effective and administratively efficient.
The reinsurer may face difficulties in pricing the agreement accurately due to the variable nature of risks ceded.
Fac-oblig is only one of the many reinsurance agreement options available to you. Whatever type of reinsurance you decide for your clients, you can check out our list of the world’s largest reinsurance companies to know which reinsurer to contract.
This form of reinsurance works as a strategic tool for managing complex, high-value, or non-standard risks that may not fit within standard treaty reinsurance agreements.
This arrangement allows brokers to offer clients greater flexibility and certainty, as the insurer can choose which risks to cede. The reinsurer is obligated to accept them if they meet the agreed criteria in this reinsurance agreement.
Facultative obligatory reinsurance empowers brokers to secure capacity for challenging placements, fill gaps left by treaties, and support clients’ growth into new or volatile lines of business. Additionally, it helps brokers address clients’ capital management and regulatory needs by enabling targeted risk transfer without the administrative burden of negotiating each risk individually.
Ultimately, fac-oblig reinsurance enhances a broker’s ability to deliver tailored, reliable solutions, even in a challenging and dynamic business environment.
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