Answered by Shaykh Faraz Rabbani
If one dies without performing the current fard prayer, do they die a sinner?
In the Name of Allah, Most Merciful and Compassionate
May Allah’s peace and blessings be upon His Messenger Muhammad, his folk, companions, and followers
Walaikum assalam wa rahmatullah,
No, they would not die a sinner in this case, unless they had made the firm resolve not to perform the prayer before the time goes out. This is because morally responsibility is (ultimately) determined by the end of the time in the Hanafi school. [Ibn Abidin, Radd al-Muhtar; Ibn Nujaym, al-Ashbah wa’l Nadha’ir]
Thus, if one dies within a prayer time without having performed the prayer, one will not be responsible for that prayer.
And Allah alone gives success.