Student loan calculator
$1,420.62/month principal and interest
$45,475 total interest
Principal $125,000 Interest $45,475. 27¢ of every dollar paid goes to interest.
$125,000 over 10 years at 6.52%.
Source: U.S. Department of Education, 2026-27 undergraduate rate (default). An average, not an offer.
| Plan | Payment | Total interest |
|---|---|---|
| Standard (10 years) | $1,420.62 | $45,475 |
| Tiered Standard (25 years) | $845.57 | $128,672 |
| Extended (15 years) | $1,090.26 | $71,247 |
| Extended (20 years) | $933.44 | $99,025 |
| Extended (25 years) | $845.57 | $128,672 |
Amortization schedule
First 12 months
| Month | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $741.46 | $679.17 | $124,258.54 |
| 2 | $745.48 | $675.14 | $123,513.06 |
| 3 | $749.53 | $671.09 | $122,763.53 |
| 4 | $753.61 | $667.02 | $122,009.92 |
| 5 | $757.70 | $662.92 | $121,252.22 |
| 6 | $761.82 | $658.80 | $120,490.40 |
| 7 | $765.96 | $654.66 | $119,724.44 |
| 8 | $770.12 | $650.50 | $118,954.32 |
| 9 | $774.30 | $646.32 | $118,180.02 |
| 10 | $778.51 | $642.11 | $117,401.51 |
| 11 | $782.74 | $637.88 | $116,618.77 |
| 12 | $786.99 | $633.63 | $115,831.77 |
Year by year
| Year | Principal | Interest | Balance at year end |
|---|---|---|---|
| 1 | $9,168 | $7,879 | $115,832 |
| 2 | $9,784 | $7,263 | $106,048 |
| 3 | $10,442 | $6,606 | $95,606 |
| 4 | $11,143 | $5,904 | $84,463 |
| 5 | $11,892 | $5,156 | $72,571 |
| 6 | $12,691 | $4,357 | $59,881 |
| 7 | $13,543 | $3,504 | $46,338 |
| 8 | $14,453 | $2,594 | $31,884 |
| 9 | $15,424 | $1,623 | $16,460 |
| 10 | $16,460 | $587 | $0 |
| Total | $125,000 | $45,475 | $0 |
Full schedule, all 120 payments
| Month | Principal | Interest | Balance |
|---|---|---|---|
| 1 | 741.46 | 679.17 | 124,258.54 |
| 2 | 745.48 | 675.14 | 123,513.06 |
| 3 | 749.53 | 671.09 | 122,763.53 |
| 4 | 753.61 | 667.02 | 122,009.92 |
| 5 | 757.70 | 662.92 | 121,252.22 |
| 6 | 761.82 | 658.80 | 120,490.40 |
| 7 | 765.96 | 654.66 | 119,724.44 |
| 8 | 770.12 | 650.50 | 118,954.32 |
| 9 | 774.30 | 646.32 | 118,180.02 |
| 10 | 778.51 | 642.11 | 117,401.51 |
| 11 | 782.74 | 637.88 | 116,618.77 |
| 12 | 786.99 | 633.63 | 115,831.77 |
| 13 | 791.27 | 629.35 | 115,040.51 |
| 14 | 795.57 | 625.05 | 114,244.94 |
| 15 | 799.89 | 620.73 | 113,445.05 |
| 16 | 804.24 | 616.38 | 112,640.81 |
| 17 | 808.61 | 612.02 | 111,832.20 |
| 18 | 813.00 | 607.62 | 111,019.20 |
| 19 | 817.42 | 603.20 | 110,201.78 |
| 20 | 821.86 | 598.76 | 109,379.92 |
| 21 | 826.32 | 594.30 | 108,553.60 |
| 22 | 830.81 | 589.81 | 107,722.79 |
| 23 | 835.33 | 585.29 | 106,887.46 |
| 24 | 839.87 | 580.76 | 106,047.59 |
| 25 | 844.43 | 576.19 | 105,203.16 |
| 26 | 849.02 | 571.60 | 104,354.14 |
| 27 | 853.63 | 566.99 | 103,500.51 |
| 28 | 858.27 | 562.35 | 102,642.24 |
| 29 | 862.93 | 557.69 | 101,779.31 |
| 30 | 867.62 | 553.00 | 100,911.69 |
| 31 | 872.34 | 548.29 | 100,039.35 |
| 32 | 877.07 | 543.55 | 99,162.28 |
| 33 | 881.84 | 538.78 | 98,280.44 |
| 34 | 886.63 | 533.99 | 97,393.81 |
| 35 | 891.45 | 529.17 | 96,502.36 |
| 36 | 896.29 | 524.33 | 95,606.06 |
| 37 | 901.16 | 519.46 | 94,704.90 |
| 38 | 906.06 | 514.56 | 93,798.84 |
| 39 | 910.98 | 509.64 | 92,887.86 |
| 40 | 915.93 | 504.69 | 91,971.93 |
| 41 | 920.91 | 499.71 | 91,051.02 |
| 42 | 925.91 | 494.71 | 90,125.11 |
| 43 | 930.94 | 489.68 | 89,194.17 |
| 44 | 936.00 | 484.62 | 88,258.17 |
| 45 | 941.09 | 479.54 | 87,317.08 |
| 46 | 946.20 | 474.42 | 86,370.88 |
| 47 | 951.34 | 469.28 | 85,419.54 |
| 48 | 956.51 | 464.11 | 84,463.03 |
| 49 | 961.71 | 458.92 | 83,501.33 |
| 50 | 966.93 | 453.69 | 82,534.39 |
| 51 | 972.19 | 448.44 | 81,562.21 |
| 52 | 977.47 | 443.15 | 80,584.74 |
| 53 | 982.78 | 437.84 | 79,601.96 |
| 54 | 988.12 | 432.50 | 78,613.85 |
| 55 | 993.49 | 427.14 | 77,620.36 |
| 56 | 998.88 | 421.74 | 76,621.47 |
| 57 | 1,004.31 | 416.31 | 75,617.16 |
| 58 | 1,009.77 | 410.85 | 74,607.39 |
| 59 | 1,015.26 | 405.37 | 73,592.14 |
| 60 | 1,020.77 | 399.85 | 72,571.37 |
| 61 | 1,026.32 | 394.30 | 71,545.05 |
| 62 | 1,031.89 | 388.73 | 70,513.15 |
| 63 | 1,037.50 | 383.12 | 69,475.65 |
| 64 | 1,043.14 | 377.48 | 68,432.52 |
| 65 | 1,048.81 | 371.82 | 67,383.71 |
| 66 | 1,054.50 | 366.12 | 66,329.21 |
| 67 | 1,060.23 | 360.39 | 65,268.97 |
| 68 | 1,065.99 | 354.63 | 64,202.98 |
| 69 | 1,071.79 | 348.84 | 63,131.19 |
| 70 | 1,077.61 | 343.01 | 62,053.58 |
| 71 | 1,083.46 | 337.16 | 60,970.12 |
| 72 | 1,089.35 | 331.27 | 59,880.77 |
| 73 | 1,095.27 | 325.35 | 58,785.50 |
| 74 | 1,101.22 | 319.40 | 57,684.28 |
| 75 | 1,107.20 | 313.42 | 56,577.07 |
| 76 | 1,113.22 | 307.40 | 55,463.85 |
| 77 | 1,119.27 | 301.35 | 54,344.59 |
| 78 | 1,125.35 | 295.27 | 53,219.24 |
| 79 | 1,131.46 | 289.16 | 52,087.77 |
| 80 | 1,137.61 | 283.01 | 50,950.16 |
| 81 | 1,143.79 | 276.83 | 49,806.37 |
| 82 | 1,150.01 | 270.61 | 48,656.36 |
| 83 | 1,156.26 | 264.37 | 47,500.10 |
| 84 | 1,162.54 | 258.08 | 46,337.57 |
| 85 | 1,168.85 | 251.77 | 45,168.71 |
| 86 | 1,175.21 | 245.42 | 43,993.51 |
| 87 | 1,181.59 | 239.03 | 42,811.92 |
| 88 | 1,188.01 | 232.61 | 41,623.90 |
| 89 | 1,194.47 | 226.16 | 40,429.44 |
| 90 | 1,200.96 | 219.67 | 39,228.48 |
| 91 | 1,207.48 | 213.14 | 38,021.00 |
| 92 | 1,214.04 | 206.58 | 36,806.96 |
| 93 | 1,220.64 | 199.98 | 35,586.32 |
| 94 | 1,227.27 | 193.35 | 34,359.05 |
| 95 | 1,233.94 | 186.68 | 33,125.12 |
| 96 | 1,240.64 | 179.98 | 31,884.47 |
| 97 | 1,247.38 | 173.24 | 30,637.09 |
| 98 | 1,254.16 | 166.46 | 29,382.93 |
| 99 | 1,260.97 | 159.65 | 28,121.96 |
| 100 | 1,267.83 | 152.80 | 26,854.13 |
| 101 | 1,274.71 | 145.91 | 25,579.42 |
| 102 | 1,281.64 | 138.98 | 24,297.77 |
| 103 | 1,288.60 | 132.02 | 23,009.17 |
| 104 | 1,295.61 | 125.02 | 21,713.57 |
| 105 | 1,302.65 | 117.98 | 20,410.92 |
| 106 | 1,309.72 | 110.90 | 19,101.20 |
| 107 | 1,316.84 | 103.78 | 17,784.36 |
| 108 | 1,323.99 | 96.63 | 16,460.36 |
| 109 | 1,331.19 | 89.43 | 15,129.18 |
| 110 | 1,338.42 | 82.20 | 13,790.76 |
| 111 | 1,345.69 | 74.93 | 12,445.07 |
| 112 | 1,353.00 | 67.62 | 11,092.06 |
| 113 | 1,360.36 | 60.27 | 9,731.71 |
| 114 | 1,367.75 | 52.88 | 8,363.96 |
| 115 | 1,375.18 | 45.44 | 6,988.78 |
| 116 | 1,382.65 | 37.97 | 5,606.13 |
| 117 | 1,390.16 | 30.46 | 4,215.97 |
| 118 | 1,397.72 | 22.91 | 2,818.25 |
| 119 | 1,405.31 | 15.31 | 1,412.95 |
| 120 | 1,412.95 | 7.68 | 0.00 |
Sources
- Federal Direct Loan rates, 2026-27. U.S. Department of Education, Federal Student Aid, loans first disbursed from July 1, 2026; retrieved September 26, 2026.
Numbers on this page last changed September 26, 2026. How they are calculated: methodology.