Earlier, 38 per cent DA was being given to them.
The decision will benefit about 8 lakh state employees and 4.40 lakh pensioners, according to an official release.
Apart from the state employees, this benefit will also be payable to the work-charged, Panchayat Samiti and Zila Parishad employees.
The state government will bear a financial burden of about Rs 1,640 crore annually with this increase.
Chief Minister Ashok Gehlot said the central government announced a DA, but it is implemented after a long time, while the Rajasthan government ensures immediate payment of the increased amount along with the announcement.