Tropical soils absorb a large amount of phosphorus that are being added as fertilizers. To evaluate this for Malaysian soils, four representative soils from the order Ultisols and Oxisols were used. One gram of the soils was equilibrated with 0.1 N KCl containing various amounts of inorganic P for 24 hours. The phosphorus disappearing from the solution was taken as the amount adsorbed. The sorption data were evaluated using the Langmuir isotherm equation. It was found that this only fits at equilibrium concentration less than 12 mg P l-1. The maximum amount of phosphorus that can be absorbed by these soils was calculated to be 1.08, 0.75, 1.24 and 1.08 mg P g-1 soil for the Bungor, Durian, Melaka and Munchong soil series respectively. The adsorbed P was fractionated and found to contain more Al-P than Fe-P, confirming the knowledge that AI plays a more important role than Fe in phosphate fixation.