Moral hazard
Moral hazard in insurance describes the risk that having insurance changes a policyholder's behaviour — specifically, that full coverage reduces the incentive to take reasonable precautions to prevent a loss. If someone else will pay for the consequences, the cost-benefit calculation for risk-taking shifts.
Examples across insurance types
Motor
A driver with comprehensive cover may park more carelessly or drive in worse conditions than one with third-party only, knowing repairs will be covered regardless of fault.
Home
A homeowner with contents insurance may be less diligent about securing the property (leaving windows open, not fitting locks) than one without cover.
Health
Someone with full medical cover may seek more frequent consultations, procedures, or treatments than they would if paying out of pocket — not necessarily dishonestly, but responding to the perceived zero cost.
Business
A business with business interruption insurance may take less care to maintain backup systems or contingency plans than one that would bear all losses itself.
How insurers manage moral hazard
Policy design addresses moral hazard through several mechanisms:
- Excesses (deductibles): Requiring the policyholder to share in every loss restores the financial incentive to prevent claims. The higher the excess, the stronger the alignment of interests. See policy excess.
- Exclusions for deliberate acts: Removing cover for losses deliberately caused prevents the extreme form of moral hazard — fraud. See exclusions explained.
- Co-insurance: In health insurance, requiring the insured to pay a percentage of costs (e.g. 20%) maintains an incentive for cost-conscious use. See coinsurance.
- Policy conditions: Requirements such as maintaining security systems, servicing equipment, or following professional protocols ensure the insured maintains reasonable risk management even with cover.
- No-claims discounts: Rewarding claim-free years aligns the policyholder's interest in loss prevention with the insurer's. See no-claims bonus.
Moral hazard vs adverse selection
Adverse selection is a related but distinct concept: it occurs before a policy is issued and describes the tendency for higher-risk people to buy more insurance than lower-risk people. If an insurer cannot distinguish between risk levels, premiums rise, low-risk people drop out, and the insurer ends up with only high-risk customers — a deteriorating spiral.
Moral hazard occurs after the policy is in force and affects the behaviour of anyone who is insured, regardless of their initial risk level. Both are examples of information asymmetry — situations where one party (the policyholder) knows more about the risk than the other (the insurer). For how insurers address this at the application stage, see underwriting.
Moral hazard FAQ
Frequently asked questions
- These are two distinct problems in insurance. Adverse selection occurs before the policy is issued — high-risk individuals are more likely to seek insurance than low-risk ones, meaning the insurer attracts a worse-than-average risk pool. Moral hazard occurs after the policy is issued — the existence of cover changes the insured's behaviour. Insurers address adverse selection through underwriting and pricing; they address moral hazard through policy design (excesses, conditions, exclusions). Both are covered in the NAIC consumer education resources.
- No — moral hazard describes a spectrum from negligence to fraud, but it is not synonymous with fraud. At one end: leaving a car unlocked because "it's insured anyway" — not fraud, but risk-taking behaviour that increases claim likelihood. At the other end: deliberately causing a loss to claim insurance money — outright fraud. Most moral hazard falls in the middle: reduced care in preventing losses rather than deliberate cause. Fraud is a criminal act; moral hazard is a structural economic phenomenon that policy design attempts to reduce.
- Yes — this is precisely why excesses exist. A higher excess gives the policyholder a direct financial stake in each claim, maintaining the incentive to prevent losses. If you bear the first £500 of every claim, you have a reason to lock your car, maintain your property, and take reasonable precautions. The excess is one of the primary tools insurers use to manage moral hazard. This is also why voluntary excesses reduce premiums — you signal to the insurer that you will take care to avoid small claims. See our entry on the policy excess.
- Yes — partly. Deliberate damage exclusions exist precisely because allowing cover for intentional loss would be a pure moral hazard: the insured would have an incentive to destroy their property to collect the insurance. Wear-and-tear exclusions also reflect moral hazard logic — if ordinary maintenance failures were covered, policyholders would have no incentive to maintain their property. Understanding why these exclusions exist makes them more predictable. See our guide to exclusions explained.