Different ratings are widely applied to evaluate risk, to estimate financial stability of emitents, to find security of risk level, to develop company strategies, to evaluate credit risks and internal assessment of a borrower. Based on International Financial Reporting Standards 4 (IFRS 4) Insurers should disclose of information (not cash flows) that helps users in understanding the amount, timing and uncertainty of future cash flows from insurance contracts and therefore large amount of financial information is available in home pages of insurance companies. The authors aim is to create algorithm giving possibility to assess the reliability ratings for Latvian non-life insurance companies based on official financial information in internet. Used time period is 2005 and 2008 because balance sheets in these years are made based on IFRS standards. To reach the above mentioned aim the authors use the following methods: monographic, problems analysis, scientific indicators and deduction method, statistical methods (taxonometric method) and finally have found the rating system use of which is possible for all concerned parties, including clients.