Germany (D), Austria (A) and Switzerland (CH) share a long tradition in monitoring the economic performance of forest enterprises by means of forest accountancy networks. The results generated by these networks are a valuable empirical basis for forestry sector statistics in these countries. In the context of international analyses it is common practice to compare results between countries directly, without addressing the issue of compatibility. However, severe biases and even misjudgements may result from such simplistic approaches. These networks have been developed as national solutions, and their results are neither grounded on common methodological standards nor on attuned definitions, so that their compatibility is not guaranteed. The rising interest in international comparisons indicates that existing accountancy networks may well serve additional purposes. At the same time the importance of compatibility, if not standardisation, is highlighted. The institutions in charge of forestry accountancy networks in these countries recently launched an initiative to establish comparable datasets and to provide additional background information allowing a sound interpretation of any differences. This paper reflects the associated challenges, describes the agreements achieved as well as the common approaches adopted, and presents respective forestry financial results. This example illustrates the prospects as well as the limitations of deriving comparable data from heterogeneous sources. Initially, only few ratios are suited for valid comparisons. However, international compatibility could be improved substantially by computing alternative aggregates following a