wikiHow Calculating Mortgage Interest Answers 1. The monthly mortgage payment is $1,193.54. 2. The total interest paid over the life of the loan is $113,598.30. 3. The total interest paid over the life of the loan is $94,169.23. 4. The monthly mortgage payment is $1,664.20. 5. The new monthly mortgage payment is $1,225.47. 6. The total interest paid over the first 10 years of the loan is $98,612.52. 7. The total interest paid over the life of the loan is $224,754.36. 8. The monthly mortgage payment is $1,864.24. 9. The total interest paid over the life of the loan is $53,839.67. 10. The monthly mortgage payment is $2,027.67. 11. The new monthly mortgage payment is $1,031.22. 12. The total interest paid over the life of the loan is $49,666.85. 13. The total interest paid over the life of the loan is $192,511.07. 14. The monthly mortgage payment is $1,246.50. 15. The total interest paid over the life of the loan is $38,386.58. Page