To increase the shear capacity of the webs of large steel plate girders, prismatic (i.e. constant depth) and tapered (i.e. varying depth) corrugated webs are currently used. Accordingly, an accurate knowledge of the critical shear buckling stresses of different corrugated webs is necessary for the shear design of these girders. Hence, the present paper focuses on the determination of the critical buckling stresses of prismatic and tapered steel corrugated webs. Currently, linear buckling analyses are performed by using ABAQUS software on different corrugated web plates. The corrugated webs considered in this finite element (FE) analyses have practical dimensions similar to those of the available bridges with corrugated webs. To ensure the validity of the current buckling analyses, prismatic flat plate webs are firstly simulated and compared with the critical buckling formulas. Having validated the model, prismatic corrugated plates are generated and the results are used to suggest new critical shear buckling stress formula. This formula is found to provide more accurate results when compared it with the critical shear buckling stresses of the corrugated web obtained from the available interactive shear buckling stress formulas. This study then extends to include the different types of tapered corrugated plates, at which new formulas are suggested at the end. The generated FE models consider the effects of the web depth, web thickness, boundary conditions of the upper and lower edge of the plates (i.e. simple or fixed), different corrugation profiles and inclination angle of tapered plates.