In a joint statement, the government and FARC said they had "started working on agreements" dealing with the group's participation in the political process, Colombia Reports said Sunday.
Government negotiator Humberto de la Calle said talks with FARC "have never come this far."
"This isn't just about guarantees," De La Calle said, adding the potential for FARCs involvement in Colombia's political process was discussed "because we hope that, at the signing of the pact, they lay down their weapons, demobilize and incorporate themselves in society."
Both sides must agree to five negotiation points before a peace agreement can be signed. The sides have already agreed to rural reform.
FARC is the Spanish acronym for the Revolutionary Armed Forces of Colombia.