A Dissertation Submitted in Partial/Fulfillment of the Requirements for Award of the Degree of Master of Business Administration (MBA) of Mzumbe UniversityThis dissertation was to provide in depth comparative analysis of profitability of thinned and unthinned commercial forest plantation with and without carbon revenue. The study was conducted for Plantations under Green Resources Ltd and Sao Hill Forest Plantations in Mufindi District. The main objective of this study was to compare the profitability of thinned and unthinned commercial forest plantations with and without carbon sequestration. The study was conducted in two phases; the first phase was a time and work study on thinning operations. The second phase, involved enumeration of thinned and unthinned compartments. Systematic random sampling was used and the plots were distributed systematically throughout the planted area in order to achieve representation of different species, age classes and sites in the forest. The plots were geo referenced using a GPS. Plots were circular with an area of 0.04ha and a radius of 11.28 m. Data were collected by using direct observation, survey, enumeration methods and records of previous years. The study revealed that, there is significant difference on average stem diameter on thinned and unthinned forest plantation both for GRL and Sao hill forests. Furthermore the study revealed that, it is more profitable to invest in thinned forest plantations when combining sawn timber and carbon revenue. Moreover the study revealed that, the trees with ages between 11 to 14 years for Green Resources and Sao hill forest plantations attain high AEV with and without carbon revenue (CR). A plantation with CR has high AEV compared to a plantation without CR. Also between the ages of 11 - 14 years, the forest plantation attain the highest NPV/ha and AEV/ha before and after the last thinning at age 13. Our study tested different thinning methods and the results revealed that, thinning by using a chainsaw significantly reduced cost, time and increased productivity when operating on a large scale and when manpower is inadequate to cover all the operations in managing the forest. It is therefore recommended that, forest plantations owners thin all their forest plantations and forest plantations owners should ensure timely and proper silvicultural treatment in order to ensure high performance of the plantations. Furthermore, it is recommended that, for the sites like Idete that did not show a promising volume, thinning intensity should change and extend the rotation age from 20 to 25 to ensure better gain in x volume and tree diameters. From supply chain matrix, it is recommended that, plantations should be thinned by using chainsaw as it significantly reduces cost, time and increases productivity when operating on a large scale and when manpower is inadequate to cover all the operations in managing the forest.Lastly, I recommend that, forest plantations should also engage in carbon business because it gives high AEV, Net Revenue and NPV compared to the plantations which are not engaged in carbon business.