The details of the Emissions Trading Scheme will be released in coming weeks, but government parties are still debating the finer details.
In July, the Interim Climate Change Committee released a report that included a proposal to introduce the agricultural sector to the ETS by 2025.
It also proposed introducing a farm-level levy/rebate scheme.
Consultation on the discussion document closed last month, which included the New Zealand First deal for a 95 percent discount for farmers.
Climate Change Minister James Shaw said pricing decisions were still being made.
"We were consulting on different ways of introducing a pricing system, you've got to remember the Interim Climate Change Committee themselves recommended a farm levy fee and rebate system that is parallel to the ETS, so we are just working through what the options are at the moment," he said.
New Zealand First Leader Winston Peters said the party was happy with the position it had gotten to with the ETS.
"This was always a big project, it's the only responsible thing to do and we intend to take the primary producers, the farmers of this country with us into a far more sustainable, responsible space, whilst making money for the country at the same time," he said.