Overseer Ltd is to charge for its new farm-modelling software from February 11, and will also be launching two other versions later this year.
An Overseer version for tertiary institutes as a training resource for agricultural students will be released within the next few weeks, while a version for science researchers will be launched in June.
Earlier versions of Overseer will be phased out by June.
Chief executive Caroline Read said the new and improved version of the Overseer modelling software, OverseerFM (Farm Modelling), was introduced in June last year and offered to farmers and other users free of charge while it was being developed.
''We wanted people to have the chance to play with it, to set it up on their farms and see how much more user-friendly it is,'' Read said.