An interesting quote:
Scheffner was only too much aware of Kant’s belief that there was nothing to be expected after death. Though in his philosophy he had held out hope for eternal life and a future state, in his personal life he had been cold to such ideas. Scheffner had often heard Kant scoff at prayer and other religious practices. Organized religion filled him with ire. It was clear to anyone who knew Kant personally that he had no faith in a personal God. Having postulated God and immortality, he himself did not believe in either. His considered opinion was that such beliefs were just a matter of “individual needs.” Kant himself felt no such need.
(Source: Kant: A Biography, by Manfred Kuehn, p. 2-3)
There may be some controversy about this among Kant scholars.