Rental insurance, also known as annuities or insured rents, are financial products that provide a periodic income to an individual for a specific period of time, typically until the end of their life. They operate similarly to a pension, in that they offer a steady source of income to cover expenses during retirement or in life stages where a predictable and stable cash flow is required.

In general terms, the individual pays an initial sum of money, called a premium, to the insurance company. In exchange, the insurance company agrees to pay a fixed amount periodically, whether monthly, quarterly, or annually, to the policyholder for a specified period of time or until their death, as agreed upon in the contract.

Annuity insurance can be an effective way to ensure a steady income throughout life, which can be especially helpful in retirement when labor income decreases. Additionally, they provide financial security by eliminating the worry of running out of funds in old age.

It's important to note that annuity insurance can vary in terms of features and benefits depending on the provider and type of product. Some may offer additional options, such as the possibility for beneficiaries to inherit the unused balance in case of the policyholder's death, while others may adjust payments based on factors like inflation.