Price agreements are a kind of special interpretation of tax law, which aims to protect the interests of the taxpayer, by removing the risks associated with the possibility of a challenge by the tax authorities correctness of settlements made between related parties. The challenge to the correctness of the transaction price in the course of inspection activities may involve in relation to the taxpayer of tax penalties and penal tax. The aim of the agreement is the recognition by the tax authority confirmation of the choice and application of the transfer pricing methodology. In the case of a price agreement, a taxpayer can be assured that the eventual tax audit will not challenge applied transaction prices by him and his partner. Thus, the agreement price will constitute security interests of the taxpayer by increasing confidence regularity assessment of taxes, thereby increasing the confidence to invest.