The 12-month policy period is not a natural law of insurance. It is a technology constraint that became a convention. Before electronic rating systems, annual renewal was the only administratively tractable way to reassess risk and adjust premium — doing it more frequently would have required a manual rerating process that was simply not feasible at volume. That constraint is gone. What has not yet gone is the convention it produced: a regulatory, actuarial, and distribution ecosystem built around the assumption that risk is assessed once a year.
The question I have been thinking through carefully for the past two years is whether continuous underwriting — underwriting that reassesses risk and adjusts premium at intervals measured in weeks or months rather than years — is technically and regulatorily feasible in European insurance markets, and what it requires from the infrastructure layer to become deployable at scale. My conclusion is that it is feasible, that the conditions are aligning faster than most of the industry expects, and that the foundational companies are being built right now.
What Continuous Underwriting Actually Means
Continuous underwriting does not mean that policyholders receive a new premium invoice every week. It means that the risk model that underlies their coverage is updated at materially higher frequency than annual, and that premium adjustments flow from those model updates at a cadence appropriate to the line of business. For personal motor, "continuous" might mean monthly premium adjustments driven by telematics data. For commercial property, it might mean quarterly reassessment based on occupancy changes and building condition data. For cyber insurance, it might mean weekly vulnerability scoring updates that trigger endorsements when a company's attack surface materially changes.
The common element is that the premium a policyholder pays reflects their current risk, not their risk as assessed at the last annual renewal date. This benefits low-risk policyholders who improve their risk profile (and are currently cross-subsidising higher-risk policyholders who have not renewed yet) and it benefits carriers who can reprice deteriorating risks before the annual renewal cycle forces the question.
The Actuarial Case for Continuous Underwriting
From an actuarial standpoint, continuous underwriting addresses a fundamental information asymmetry that annual policies create. A policyholder whose risk changes significantly mid-year — they move house, their driving behaviour changes, their business operations expand into new activities — is insured under terms that were set for a different risk. The insured knows about the change; the insurer does not learn about it until the next renewal declaration or until a claim arrives.
This information asymmetry has two costs. For the insurer, it produces adverse selection dynamics where policyholders with deteriorating risk are retained (they do not voluntarily disclose mid-year changes that would increase their premium) while policyholders with improving risk actively shop at renewal (they know they can get better terms). For the policyholder who improves their risk profile, it produces a subsidisation effect — they pay a premium calibrated to higher risk until renewal. Continuous underwriting, if it works, collapses this information asymmetry continuously rather than resolving it at annual intervals.
The Regulatory Framework: More Permissive Than Expected
The assumption that European insurance regulation requires annual policy structures is incorrect, though it is widely held. The Insurance Distribution Directive (IDD) and the Solvency II framework govern how insurance products are sold and how insurers manage capital — neither mandates annual policy periods. National contract law in most European jurisdictions permits insurers and policyholders to agree to different structures as long as the terms are clearly disclosed and the policyholder's right to cancel with appropriate notice is protected.
The regulatory question that is genuinely open is how continuous repricing is treated from a consumer protection standpoint. If a carrier can increase a policyholder's premium mid-policy based on behavioural data (telematics showing deteriorating driving behaviour, for example), the regulatory bodies — FCA in the UK, various national supervisors in EU markets — have an interest in ensuring that the repricing does not operate in ways that are opaque to the policyholder or that discriminate unlawfully. The EIOPA guidelines on Big Data Analytics in insurance, and the more recent EU AI Act provisions on high-risk AI systems, create explainability requirements for algorithmic pricing decisions that apply to continuous underwriting as directly as to initial underwriting.
This is not a reason not to build continuous underwriting. It is a design constraint that shapes how it must be built. The models that reprice continuously must produce outputs that are explainable to the policyholder in terms they can understand and act on. "Your premium increased because your driving behaviour score declined in the past 30 days, specifically: harsh braking frequency +18%, late-night driving +22%" is an explainable repricing decision. A model that adjusts premium based on opaque feature combinations that cannot be explained to the policyholder is not deployable under current EIOPA guidelines, regardless of its accuracy.
The Lines of Business Where It Works First
Continuous underwriting will not be the right structure for every insurance line simultaneously. The lines where it is technically and commercially ready first share three characteristics: high-frequency observable risk data is already available; the connection between that data and claims outcomes is strong enough to be actuarially defensible; and the policyholder has sufficient agency over the risk factors being measured that repricing based on behaviour is commercially reasonable.
Commercial fleet motor is the clearest candidate: telematics data is already widely deployed, the connection between driving behaviour scores and motor claims outcomes is extensively documented in actuarial literature, and fleet operators have real operational leverage over driver behaviour. A commercial fleet operator who receives quarterly repricing tied to fleet-wide telematics performance has a direct incentive to invest in driver training. The alignment of interests between insurer and insured is unusually strong.
Cyber insurance for SMEs is the second clearest: network vulnerability scanning APIs can now assess a company's attack surface at high frequency, the connection between specific vulnerability classes and claims exposure is increasingly well-evidenced, and SME operators have material agency over their cyber hygiene posture. The continuous underwriting logic — "your premium adjusts quarterly based on your current vulnerability score" — is more defensible than an annual cyber survey that is out of date from the moment it is completed.
What the Infrastructure Requires
Building continuous underwriting products requires infrastructure that does not yet exist as an off-the-shelf solution: a policy administration system capable of managing mid-term premium adjustments at scale without generating individual endorsement documents for each repricing cycle, a premium collection mechanism that handles variable premium amounts without requiring the policyholder to re-approve each adjustment, and a regulatory documentation system that maintains an auditable record of each repricing decision with the explanation required for supervisory review.
We are watching carefully the seed-stage companies building pieces of this infrastructure. The policy administration systems designed for continuous underwriting are architecturally different from those designed for annual policies — they are event-driven rather than batch-driven, they maintain a continuous state model of each policy rather than a periodic snapshot, and they need to handle the regulatory disclosure obligations for each state change. The companies building in this space in 2025 are making the foundational architectural decisions that will determine whether continuous underwriting scales into a mainstream product structure over the next five years, or remains a niche innovation deployed by a small number of technically advanced carriers.