Steel–concrete composite flexural members are steel girders and concrete slabs connected by shear connectors at their interface. These members are gaining popularity due to their high span-to-depth ratio and ease of construction. But these members are slender and hence vulnerable to deflection criteria. As these members consist of concrete, they will be affected by cracking and tension stiffening at instantaneous loading within the serviceability limit. For this purpose, it is required to develop a procedure that takes into account the cracking and tension-stiffening effects. Therefore, a novel computationally efficient procedure has been proposed to account for the above effects in the composite flexural members subjected to service load for use in everyday design. At the element level, the procedure is analytical, and at the structural level, it is numerical. To simulate cracking, an ingenious cracked span-length two-noded beam element with two cracked zones and one uncracked zone was used. The tension stiffening is considered in the cracked zone to include the tensile strength of the uncracked concrete portion between two cracks. Average tension stiffening characteristics for cracked zones are determined to maintain the analytical nature of the procedure at the element level. The procedure resulted in both deflections and redistributed moments. The developed procedure has been validated by comparing the results from the finite element model. Since there is no discretization required along and across the members, the procedure would lead to a drastic reduction in computational time in the case of continuous composite beams.