ðə tˈoʊɾəl ɐmˈaʊnt ʌv ˈɪntɹɛst ðæt wɪl biː pˈeɪd ˌoʊvɚ ðə lˈaɪftaɪm ʌvðə lˈoʊn ɪz ðə dˈɪfɹəns ʌvðə tˈoʊɾəl pˈeɪmənt ɐmˈaʊnt ænd ðə lˈoʊn pɹˈɪnsɪpəl:
The total amount of interest  that will be paid over the lifetime of the loan is the difference of the total payment amount () and the loan principal ():