The general principles for determining the financial performance of a company is that revenue is earned as goods are delivered or services provided, and that expenses in the period are made up of the costs associated with this earned revenue. In the insurance industry, premium payments are typically made upfront, and can provide coverage for several years, or be paid many years before the coverage period starts. The associated costs are often not fully known until many years later. Hence, complexity arises both in determining how a premium paid should be earned over time, and in valuing the costs associated with this earned premium. IFRS 17 attempts to align the insurance industry with these general accounting principles. We bring this new accounting standard into the realm of actuarial science, through a mathematical interpretation of the regulatory texts, and by defining the algorithm for profit or loss in accordance with the new standard. Furthermore, we suggest a computationally efficient risk-based method of valuing a portfolio of insurance contracts and an allocation of this value to subportfolios. Finally, we demonstrate the practicability of these methods and the algorithm for profit or loss in a large-scale numerical example.

确定公司财务状况的一般原则是，收入是在交付商品或提供服务时赚取的，而当期的费用则由与此赚取的收入相关的成本组成。在保险行业中，保费通常是预先支付的，可以提供数年的承保范围，也可以在承保期开始之前支付很多年。直到很多年之后，相关的成本通常才被完全了解。因此，在确定应如何随时间赚取已支付的保险费以及评估与该已赚取的保险费相关的成本方面都变得复杂。IFRS 17试图使保险业与这些一般会计原则保持一致。我们将此新会计准则带入精算科学领域，通过对法规文本进行数学解释，并根据新标准定义损益算法。此外，我们建议使用一种基于计算的高效风险评估保险合同组合并将其分配给子投资组合的方法。最后，我们在一个大规模的数值例子中证明了这些方法的实用性和损益算法。