The Relationship Between HKMC Annuity and the Hong Kong Mortgage Corporation

The Hong Kong Mortgage Corporation (HKMC) has quietly become one of the most consequential, yet least understood, institutions in the territory’s retirement income landscape. Since the HKMC Annuity Plan’s launch in July 2018, the Corporation has evolved from a mortgage-liquidity facilitator into a central pillar of Hong Kong’s retirement policy, directly underwriting longevity risk for over 100,000 policyholders. In the 2025-2026 financial year, the HKMC’s role faces a structural test: as the Hong Kong government signals a potential expansion of the HKMC’s mandate to include a publicly backed longevity pool, the existing annuity product’s relationship with the Corporation’s core mortgage business—and its balance sheet—will determine whether retirees can rely on this income stream for the next two decades. Understanding this relationship requires dissecting the HKMC’s dual function as both a mortgage market stabiliser and a life annuity underwriter, a tension that is unique among global housing finance agencies.

The HKMC’s Dual Mandate: Mortgage Liquidity and Longevity Underwriting

The HKMC was established in 1997 as a government-owned company under the Hong Kong Monetary Authority (HKMA), with the explicit statutory objective of promoting the stability of the banking sector by providing liquidity to the mortgage market. Its primary instrument has been the purchase of mortgage loans from authorized institutions, funded through the issuance of debt securities under the HKMC’s HK$100 billion (US$12.8 billion) debt issuance programme, as outlined in the HKMC’s 2023 Annual Report. By 2024, the HKMC had purchased approximately HK$78 billion in mortgage loans, representing roughly 4.2% of the total outstanding residential mortgage loans in Hong Kong, according to data from the HKMA’s Monthly Statistical Bulletin.

The introduction of the HKMC Annuity Plan in 2018 represented a fundamental expansion of this mandate. The product is a fixed-term life annuity, underwritten directly by the HKMC, which converts a lump-sum premium into a guaranteed monthly income for life. As of 31 December 2024, the plan had received over 120,000 applications, with total premiums collected exceeding HK$30 billion, according to the HKMC’s 2024 Business Review. The key structural innovation is that the HKMC retains the longevity risk on its own balance sheet, rather than ceding it to a third-party reinsurer. This is a deliberate policy choice: the HKMC’s AAA credit rating, derived from its government ownership, allows it to offer annuity rates that are approximately 30-50 basis points higher than comparable products from private insurers, as the Corporation does not need to hold the same level of regulatory capital under the Insurance Authority’s (IA) capital adequacy framework.

The Balance Sheet Tension

The tension arises because the HKMC’s mortgage book and its annuity book have fundamentally different risk profiles and duration characteristics. The mortgage book is a short-to-medium-term asset, with an average life of approximately 7-8 years, as Hong Kong mortgages typically have a 30-year contractual term but are prepaid or refinanced at a high rate—the HKMA reported a prepayment rate of 12.3% for the 12 months ending June 2024. The annuity book, by contrast, is a long-term liability, with a payout duration that can extend 25-30 years for a retiree aged 65.

The HKMC manages this mismatch through its asset-liability management (ALM) framework, which is disclosed in its Annual Report. As of 2024, the Corporation held approximately 62% of its total assets in Hong Kong dollar-denominated bonds and deposits, with an average maturity of 4.5 years. The remaining 38% was in mortgage loans, which have a floating-rate component linked to the Hong Kong Interbank Offered Rate (HIBOR). This creates a structural interest rate risk: if HIBOR rises, the mortgage book’s income increases, but the annuity liabilities—which are fixed in nominal terms—do not adjust. Conversely, a prolonged low-rate environment compresses the spread between the mortgage yield and the annuity payout rate.

The HKMC’s 2024 stress test, published in its Risk Management Report, modelled a 200-basis-point upward shock to HIBOR. The result was a reduction in the Corporation’s capital adequacy ratio from 18.5% to 14.2%, still above the HKMA’s 12% minimum. However, the test did not model a simultaneous longevity shock—a scenario where Hong Kong life expectancy increases by two years, which would extend annuity payouts by approximately 8-10% on a present-value basis. This gap in stress testing is a material concern for policyholders.

The Annuity Product’s Mechanics and the HKMC’s Role as Counterparty

The HKMC Annuity Plan is structured as a single-premium immediate annuity. The policyholder pays a lump sum, which is then invested by the HKMC in a dedicated portfolio of Hong Kong dollar-denominated assets, primarily Exchange Fund Bills and Notes (EFBNs) issued by the HKMA, and AAA-rated corporate bonds. The payout rate is set at the point of purchase and is guaranteed for life, with a 5-year guarantee period. As of March 2025, the annual payout rate for a male aged 65 was 6.8% of the premium, and 6.2% for a female aged 65, reflecting the longer life expectancy of women. These rates are fixed and do not adjust for inflation.

The HKMC’s role as the direct counterparty is critical because it eliminates the credit risk that would exist if the annuity were issued by a private insurer. The HKMC’s obligations are implicitly guaranteed by the Hong Kong government, as the Corporation is 100% owned by the government through the Exchange Fund. This implicit guarantee is not legally codified—the HKMC’s debt is not explicitly guaranteed by the government—but the market treats it as such. The HKMC’s bonds trade at a yield spread of 10-15 basis points over Exchange Fund Notes, according to Bloomberg data as of Q1 2025, indicating that investors assign a near-sovereign credit quality.

However, the annuity product itself is not a government security. The policyholder’s claim is against the HKMC’s general assets, not the Exchange Fund. In the event of a severe stress scenario—such as a simultaneous housing market crash and a spike in longevity—the HKMC’s capital buffer could be depleted. The HKMC’s 2024 capital adequacy ratio of 18.5% is calculated on a regulatory basis that uses a simplified risk-weighting for the annuity liabilities. A more conservative, market-consistent valuation would likely show a lower ratio.

The Role of the HKMC’s Mortgage Insurance Subsidiary

A further layer of complexity is introduced by the HKMC’s wholly owned subsidiary, the Hong Kong Mortgage Corporation Insurance Limited (HKMC Insurance). This entity provides mortgage insurance to banks for high loan-to-value (LTV) mortgages, covering the portion of the loan above 60% LTV. As of 2024, HKMC Insurance had a total insured portfolio of approximately HK$120 billion, according to its 2024 Annual Report. The insurance subsidiary is a separate legal entity with its own capital, but it is consolidated into the HKMC group’s financial statements.

The annuity product’s assets are held at the HKMC parent level, not at the insurance subsidiary. This structural separation is important because it means that the annuity policyholders are not directly exposed to mortgage insurance claims. However, the group’s consolidated capital position is the ultimate backstop. If HKMC Insurance were to suffer a large loss—for example, from a 20% decline in Hong Kong property prices, which would trigger claims on high-LTV mortgages—the parent company would need to inject capital into the subsidiary. This would reduce the capital available to support the annuity liabilities.

The HKMC’s 2024 stress test did model a property price decline of 20%, and concluded that the group’s capital adequacy ratio would fall to 13.8%, still above the minimum. But the test assumed that the mortgage insurance claims were fully recoverable through the sale of repossessed properties. In a market where property prices are falling, the recovery rate would be lower, and the actual capital impact could be higher.

Regulatory and Policy Implications for Retirees

The HKMC’s dual mandate creates a regulatory tension that the Hong Kong government has not fully resolved. The HKMC is supervised by the HKMA for its mortgage activities, but it is not directly regulated by the Insurance Authority (IA) for the annuity product. The IA’s regulatory framework for life insurers, set out in the Insurance Ordinance (Cap. 41), requires insurers to hold reserves calculated using a prescribed mortality table and to maintain a solvency margin of 200% of the required capital. The HKMC, as a non-insurer, is not subject to these requirements. Instead, it follows the HKMA’s Supervisory Policy Manual for authorized institutions, which uses a different, less conservative methodology.

This regulatory gap was identified by the Legislative Council’s Panel on Financial Affairs in a July 2024 discussion paper, which noted that “the HKMC Annuity Plan operates outside the IA’s regulatory perimeter, and the Corporation’s capital adequacy framework does not explicitly incorporate longevity risk in the same manner as the IA’s prescribed approach.” The paper recommended that the HKMC be required to hold additional capital for longevity risk, calculated using the IA’s prescribed mortality table (the HKML96 table, which is based on 1996 population data). The HKMC has not publicly adopted this recommendation.

The 2025-2026 Policy Shift

In the 2025 Policy Address, the Chief Executive announced a review of the HKMC’s mandate, with a view to potentially expanding its role in retirement income provision. The review, which is expected to be completed by mid-2026, will consider three options: (1) increasing the maximum premium for the HKMC Annuity Plan from the current HK$6 million to HK$10 million; (2) introducing a deferred annuity product that would allow retirees to pay premiums over a 10-year period before receiving payouts; and (3) creating a government-backed longevity pool that would pool the longevity risk of multiple annuity providers.

The third option—the longevity pool—would fundamentally change the HKMC’s relationship with the annuity market. Under the proposed structure, the HKMC would act as a central counterparty for longevity risk, receiving premiums from private insurers and paying out when the actual mortality experience of the pool deviates from the expected. This would allow private insurers to offer annuity products without holding the full capital charge for longevity risk, potentially lowering premiums for consumers. However, it would also concentrate longevity risk in the HKMC’s balance sheet, increasing its exposure to a single risk factor.

The HKMA’s 2025 Financial Stability Report, published in March 2025, estimated that the longevity pool would require an initial capital injection of HK$5-8 billion from the government, depending on the pool’s size and the mortality assumptions used. The report noted that “the pool’s capital adequacy would be sensitive to the choice of mortality table, with a one-year increase in life expectancy increasing the required capital by approximately 15-20%.” This underscores the importance of using up-to-date mortality data, as the current HKML96 table significantly underestimates Hong Kong’s actual life expectancy, which has increased by 3.2 years for males and 2.8 years for females since 1996, according to the Census and Statistics Department’s 2024 Demographic Report.

Actionable Takeaways for Retirees

1. The HKMC Annuity Plan’s payout rate of 6.8% for a 65-year-old male (as of March 2025) is approximately 40 basis points higher than comparable products from private insurers, but this premium reflects the HKMC’s implicit government backing, not a market-competitive rate—policyholders should verify the HKMC’s capital adequacy ratio in its latest Annual Report before committing a lump sum.

2. The HKMC’s 2024 stress test did not model a simultaneous longevity and property price shock, meaning that the Corporation’s capital position could be weaker than the published 18.5% ratio suggests in a worst-case scenario—retirees should consider diversifying their annuity exposure across multiple providers.

3. The proposed 2025-2026 policy review may increase the maximum premium to HK$10 million, but this expansion will also increase the HKMC’s concentration risk—any purchase above the current HK$6 million limit should be deferred until the review’s findings are published, likely in mid-2026.

4. The longevity pool proposal, if implemented, would create a new source of systemic risk for the HKMC, as it would concentrate the longevity risk of multiple insurers on a single government-owned balance sheet—retirees should monitor the HKMA’s Financial Stability Report for updates on the pool’s capital adequacy.

5. The regulatory gap between the HKMC’s capital framework and the IA’s solvency requirements means that the annuity product is not subject to the same consumer protections as a private insurer’s annuity—policyholders should review the HKMC’s product disclosure statement, particularly the section on “Risk Factors,” which is available on the HKMC’s website.