This publication describes in detail the standard methods of the Indonesian National Carbon Accounting System (INCAS) to quantify net greenhouse gas (GHG) emissions for the forestry sector in Indonesia in a transparent, accurate, complete, consistent and comparable (TACCC) manner. The standard methods describe the approach and methods used for data collation, data analysis, quality control, quality assurance, modelling and reporting. These include: (i) Initial Conditions, (ii) Forest Growth and Turnover, (iii) Forest Management Events and Regimes, (iv) Spatial Allocation of Regimes, (v) Peatland GHG Emissions, and (vi) Modelling and Reporting. This first version of the standard methods were tested and refined to estimate emissions and removals from forest and peat lands in Central Kalimantan as the REDD+ pilot province, the results of which are reported in ‘Estimation of Annual Greenhouse Gas Emissions from Forest and Peat Lands in Central Kalimantan'. The standard methods are designed to be used at the national level; this first version can be used as the basis for developing a national GHG inventory for REDD+ activities in Indonesia.