riskiosuus

Riskiosuus is the portion of risk or potential loss that a party agrees to bear in a risk-sharing arrangement. It describes the share of exposure that remains with an individual, firm, or institution after risk transfer mechanisms such as insurance, reinsurance, or contractual risk sharing have been applied. The term is commonly used in Finnish contexts to refer to the amount or percentage of losses that a participant is responsible for, rather than the portion covered by a third party.

In insurance and reinsurance, riskiosuus often appears as either a fixed deductible or a coinsurance percentage. A deductible is a fixed amount that the policyholder must pay before the insurer covers the remainder of a loss. Coinsurance, by contrast, is a percentage of the covered losses that the policyholder must bear after the insurer has paid its share. For example, with a 20% coinsurance on a loss of 1,000,000 euros, the policyholder would bear 200,000 euros, assuming no other limits apply. In a deductible arrangement of 50,000 euros, a loss of 60,000 euros would leave the policyholder responsible for the first 50,000 euros, with the insurer paying the remainder up to policy limits.

Beyond insurance, riskiosuus is also used in finance and contracts to describe the portion of risk retained by a party in joint ventures, project finance, or risk-sharing agreements. It influences pricing, solvency considerations, and incentives for risk management. Related concepts include deductible, coinsurance, co-insurance, and reinsurance.