Puprose <p>This paper aims to investigate the involute of energy distribution pattern emerging at a porothermoelastic half space by considering the influence of three phase lag heat conduction.</p> Methodology <p>Novel formulation of governing equations for thermoelastic porous material that is saturated and incompressible with three phase lag theory is used to examine the distribution of energy with angle of incidence.</p> Results <p>Plane waves when get reflected through porous thermoelastic half space having three phase lag delays the existence of three longitudinal wave i.e. longitudinal primary wave (<i>P</i>-wave), thermal wave (<i>T</i>-wave), porous wave (<i>Ps</i>-wave), and one transversal wave (<i>SV</i>-wave) is observed. Each type of wave moves with distinct speed. Amplitude ratios of different reflected waves are used to calculate the energy ratios of the waves and it is verified that during reflection phenomena, the sum of energy ratio is equal to unity at each angle of incidence and there is no dissipation on the boundary surface.</p>