War-Risk Insurance
2026 Curves
The aviation hull-war market has been repriced twice in four years. This report tracks capacity, AVN52 mechanics, premium curves, and Lloyd's signals from the 2022 dislocation through the 2026 Gulf cascade — using only market-mechanics analysis. No state-on-state attribution; no opinion on causation.
capacity (2023)
pre-2022
increase band
cancellation clause
Capacity figures: Marsh / TMK / industry analyst disclosures. Premium-increase band: Lockton, Kennedys Law commentary on 2022 reinsurance treaties.
Executive summary
Aviation war-risk insurance is the smallest, most concentrated, and most lossy of the aviation insurance lines. Total standalone war-liability capacity sits near $1.4B (2023), down from approximately $2B in 2021. Underwriting capital is supplied by a narrow group of Lloyd's syndicates and Bermuda specialty carriers.
The market repriced sharply in 2022 following a structural shift in reinsurance terms. Quoted premium increases ran from 50% to 500% depending on fleet exposure, hull values, and contract age — figures cited in market commentary by Lockton, Marsh, and Kennedys Law. Following stability through 2023–2025, the late-February 2026 Gulf cascade produced another marked uplift, most visible in Middle East-exposed flag carrier hull-war placements.
AVN52 — the limited-war-risk extension to hull all-risks contracts — is the operationally relevant clause. The standard AVN52 framework permits the underwriter to give 7 days' notice of cancellation of the additional coverage, and to reinstate at amended terms (typically restricting geography or imposing additional premium per departure). The 2022 cycle saw widespread AVN52E notices issued; the 2026 cycle has produced similar activity for Gulf-routed flying.
This report describes market mechanics. It does not attribute the underlying events, does not assess specific carrier risk, and does not recommend insurance arrangements.
AVN52 mechanics
AVN52 is a London-market clause set used to attach limited war and allied-perils coverage onto an otherwise all-risks hull policy. The clause structure is what gives the market its short reaction time: cancellation and reinstatement happen on rolling notice periods, not at annual renewal.
| Clause | Function | Operational impact |
|---|---|---|
| AVN48B | War, hijacking & other perils exclusion (the base exclusion) | Defines what the war risk write-back has to put back in |
| AVN52 | Extended coverage write-back for limited war risks | Re-includes specific perils — strikes, riots, hijacking, malicious acts |
| AVN52D / 52E | Cancellation / amendment clauses for AVN52 | 7-day notice typical; reinstatement at amended terms |
| LSW555D | Hull war policy (standalone, not write-back) | Separate cover for total-loss exposure in war scenarios |
In a typical placement, the all-risks hull policy carries AVN48B as a baseline exclusion, with AVN52 attached to re-extend coverage to specific war-allied perils. The hull-war standalone (LSW555D) sits separately, often with different underwriters, and covers the full-loss exposure that AVN52 does not.
The 7-day cancellation feature is what causes the market to move fast around events. When a 7-day AVN52E notice is issued, operators are left to either accept amended terms (additional premium per departure, restricted geography) or operate without the affected coverage. Lessor financing covenants typically require the coverage to remain in place, so the amended terms are accepted in nearly all cases.
Capacity curve 2021–2026
Standalone third-party war-liability capacity is the cleanest dataset on market state. Marsh and industry analyst commentary tracks aggregate capacity at a per-event level. The trend has been one-way since 2021.
Capacity-curve figures are widely cited in Marsh, Lockton, and Aviation Week market reports. Year-over-year shifts within the $1.3–1.5B band reflect treaty renewal seasonality more than structural change.
Maritime (IUMI) parallel
The maritime war-risk market is a useful leading indicator. IUMI (International Union of Marine Insurance) publishes more granular hull-war additional-premium data than aviation. Movements in maritime tend to precede aviation by 2–4 weeks because shipping operators face a lower-friction route-cancellation option (anchoring offshore, redirecting), while aviation operators are committed to the contracted hull-war terms once a flight is dispatched.
Insurance Journal reported (March 6, 2026) that maritime insurers began cancelling coverage for Gulf shipping routes within days of the late-February cascade. Lloyd's List subsequently documented Gulf war-risk premiums "topping double-digit millions of dollars per trip" for selected high-risk-band passages. The aviation hull-war repricing followed on a 2–3 week lag through March.
The maritime parallel does not predict aviation prices — the lines have different exposure profiles and capital structure — but the lead-lag relationship has held over the 2022 / 2024 / 2026 cycles and remains the most actionable cross-line signal underwriters reference.
Lloyd's market signals
Lloyd's of London is the dominant aviation war risk venue. Its signals during 2026 H1 — without disclosing syndicate-specific terms — include:
- Aviation class-of-business notes: Lloyd's risk-location guidance for aviation has been refreshed during 2026 to reflect the broader Middle East envelope.
- Syndicate-level posture: TMK (Tokio Marine Kiln), the largest Lloyd's aviation writer by GWP, continues to be a primary market participant. Public statements confirm continuity of underwriting; specific terms are not disclosed.
- Reinsurance treaty cycle: Mid-year aviation treaty renewals took place against the post-Gulf market backdrop. Treaty terms typically tighten following loss events; the 2026 renewal window followed historical post-event patterns.
- Regulatory tools: Lloyd's risk-location, fronting, and capacity allocation tools remained operational; no public capacity withdrawal from aviation war reported through May 2026.
H2 2026 outlook
Premium levels for Gulf-exposed flying are not expected to revert to 2021 baselines absent multi-quarter de-escalation indicators. IATA and industry analyst commentary frames the new baseline as a 2–3 year repricing cycle.
No evidence of new entrants in standalone war-liability through H1. Treaty renewals in mid-year may produce a modest contraction depending on Q2 loss development.
7-day notice cycles are now the operational pattern. Underwriters and brokers should expect renewed AVN52E notice waves at each measurable escalation in CZIB-zone activity.
Carriers with multi-line exposure should expect more correlated movements across hull-war, marine-war, and cargo-war markets. The 2026 cycle demonstrated this clearly in the Gulf.
Methodology & sources
This report describes aviation war-risk insurance market mechanics. All figures are sourced from publicly available market commentary, broker reports, Lloyd's public material, and verified industry reporting. No FlySafe internal scoring or proprietary models are used. The report does not attribute the underlying events that drive market activity; it describes only how the insurance market responds.
Lloyd's of London — Aviation risk-location guidance
Tokio Marine Kiln (TMK) — Aviation war product pages
Marsh — Aviation war-risk coverage briefings
Lockton — Aviation market commentary 2022–2026
Kennedys Law — Aviation war-risk legal briefings
AXIS Capital — General Aviation Insurance pages
Insurance Business UK — AVN52 explainer
Insurance Journal — March 2026 Iran-conflict premium reporting
Lloyd's List — Gulf maritime war-risk premium reporting
IUMI — Maritime insurance baseline data
Aviation Week — Hull-war market commentary
Aerospace Global News — Insurance feature coverage
Related FlySafe coverage
Underwriters and brokers use FlySafe's airspace indices to align with EASA CZIB cadence and detour-route exposure.
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