Here is a Dua for Relief from Debt and Loans.
Al-Tabaraani narrated in al-Mu’jam al-Sagheer that Anas ibn Maalik (may Allaah be pleased with him) said: The Messenger of Allaah (peace and blessings of Allaah be upon him) said to Mu’aadh (may Allaah be pleased with him): “Shall I not teach you a du’aa’ which you may say even if you have debt like Mount Uhud, so that Allaah might pay it off for you? Say, O Mu’aadh: (the following dua:) (Get more Du’as for Success here )
‘Allaahumma Maalik al-mulk, tu’ti al-mulk man tasha’ wa tanzi’ al-mulk mimman tasha’, wa tu’izzu man tasha’ wa tudhilul man tasha’, bi yadika al-khayr, innaka ‘ala kulli shay’in qadeer, Rahmaan al-dunya wa’l-aakhirah wa raheemahuma, tu’teeyahuma man tasha’ wa tamna’ minhuma man tasha’, arhamni rahmatan taghnini biha ‘an rahmati man siwaaka
(O Allaah, Sovereign of all, You give dominion to whomsoever You will and You take dominion away from whomsoever You will, You exalt whomsoever You will and You bring low whomsoever You will. In Your hand is all goodness and You are able to do all things. Most Merciful and Most compassionate in this world and in the Hereafter, You give them to whomsoever You will and withhold them from whomsoever You will. Bestow mercy upon Me in such a manner that I have no need of the mercy of anyone but You).’”
Classed as hasan by al-Albaani in Saheeh al-Targheeb wa’l-Tarheeb (1821).