No..Input tax credit is available as Itc only after filing of gstr 3 of the month in which u have paid rcm tax....so it will be allowed in next return period....
how you said that claim rcm on same month according to clarification by gst department is clear. rcm you paid on which month you claim rcm on the same month.
exp. if you pay rcm in month of aug for the m/o july then you claim rcm in m/o august return.