Student loan calculator
$511.42/month principal and interest
$16,371 total interest
Principal $45,000 Interest $16,371. 27¢ of every dollar paid goes to interest.
$45,000 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) | $511.42 | $16,371 |
| Tiered Standard (15 years) | $392.49 | $25,649 |
| Extended (15 years) | $392.49 | $25,649 |
| Extended (20 years) | $336.04 | $35,649 |
| Extended (25 years) | $304.41 | $46,322 |
Amortization schedule
First 12 months
| Month | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $266.92 | $244.50 | $44,733.08 |
| 2 | $268.37 | $243.05 | $44,464.70 |
| 3 | $269.83 | $241.59 | $44,194.87 |
| 4 | $271.30 | $240.13 | $43,923.57 |
| 5 | $272.77 | $238.65 | $43,650.80 |
| 6 | $274.25 | $237.17 | $43,376.54 |
| 7 | $275.74 | $235.68 | $43,100.80 |
| 8 | $277.24 | $234.18 | $42,823.56 |
| 9 | $278.75 | $232.67 | $42,544.81 |
| 10 | $280.26 | $231.16 | $42,264.54 |
| 11 | $281.79 | $229.64 | $41,982.76 |
| 12 | $283.32 | $228.11 | $41,699.44 |
Year by year
| Year | Principal | Interest | Balance at year end |
|---|---|---|---|
| 1 | $3,301 | $2,837 | $41,699 |
| 2 | $3,522 | $2,615 | $38,177 |
| 3 | $3,759 | $2,378 | $34,418 |
| 4 | $4,011 | $2,126 | $30,407 |
| 5 | $4,281 | $1,856 | $26,126 |
| 6 | $4,569 | $1,568 | $21,557 |
| 7 | $4,876 | $1,262 | $16,682 |
| 8 | $5,203 | $934 | $11,478 |
| 9 | $5,553 | $584 | $5,926 |
| 10 | $5,926 | $211 | $0 |
| Total | $45,000 | $16,371 | $0 |
Full schedule, all 120 payments
| Month | Principal | Interest | Balance |
|---|---|---|---|
| 1 | 266.92 | 244.50 | 44,733.08 |
| 2 | 268.37 | 243.05 | 44,464.70 |
| 3 | 269.83 | 241.59 | 44,194.87 |
| 4 | 271.30 | 240.13 | 43,923.57 |
| 5 | 272.77 | 238.65 | 43,650.80 |
| 6 | 274.25 | 237.17 | 43,376.54 |
| 7 | 275.74 | 235.68 | 43,100.80 |
| 8 | 277.24 | 234.18 | 42,823.56 |
| 9 | 278.75 | 232.67 | 42,544.81 |
| 10 | 280.26 | 231.16 | 42,264.54 |
| 11 | 281.79 | 229.64 | 41,982.76 |
| 12 | 283.32 | 228.11 | 41,699.44 |
| 13 | 284.86 | 226.57 | 41,414.58 |
| 14 | 286.40 | 225.02 | 41,128.18 |
| 15 | 287.96 | 223.46 | 40,840.22 |
| 16 | 289.53 | 221.90 | 40,550.69 |
| 17 | 291.10 | 220.33 | 40,259.59 |
| 18 | 292.68 | 218.74 | 39,966.91 |
| 19 | 294.27 | 217.15 | 39,672.64 |
| 20 | 295.87 | 215.55 | 39,376.77 |
| 21 | 297.48 | 213.95 | 39,079.30 |
| 22 | 299.09 | 212.33 | 38,780.20 |
| 23 | 300.72 | 210.71 | 38,479.48 |
| 24 | 302.35 | 209.07 | 38,177.13 |
| 25 | 303.99 | 207.43 | 37,873.14 |
| 26 | 305.65 | 205.78 | 37,567.49 |
| 27 | 307.31 | 204.12 | 37,260.18 |
| 28 | 308.98 | 202.45 | 36,951.21 |
| 29 | 310.66 | 200.77 | 36,640.55 |
| 30 | 312.34 | 199.08 | 36,328.21 |
| 31 | 314.04 | 197.38 | 36,014.17 |
| 32 | 315.75 | 195.68 | 35,698.42 |
| 33 | 317.46 | 193.96 | 35,380.96 |
| 34 | 319.19 | 192.24 | 35,061.77 |
| 35 | 320.92 | 190.50 | 34,740.85 |
| 36 | 322.67 | 188.76 | 34,418.18 |
| 37 | 324.42 | 187.01 | 34,093.76 |
| 38 | 326.18 | 185.24 | 33,767.58 |
| 39 | 327.95 | 183.47 | 33,439.63 |
| 40 | 329.74 | 181.69 | 33,109.89 |
| 41 | 331.53 | 179.90 | 32,778.37 |
| 42 | 333.33 | 178.10 | 32,445.04 |
| 43 | 335.14 | 176.28 | 32,109.90 |
| 44 | 336.96 | 174.46 | 31,772.94 |
| 45 | 338.79 | 172.63 | 31,434.15 |
| 46 | 340.63 | 170.79 | 31,093.52 |
| 47 | 342.48 | 168.94 | 30,751.03 |
| 48 | 344.34 | 167.08 | 30,406.69 |
| 49 | 346.21 | 165.21 | 30,060.48 |
| 50 | 348.10 | 163.33 | 29,712.38 |
| 51 | 349.99 | 161.44 | 29,362.40 |
| 52 | 351.89 | 159.54 | 29,010.51 |
| 53 | 353.80 | 157.62 | 28,656.71 |
| 54 | 355.72 | 155.70 | 28,300.98 |
| 55 | 357.66 | 153.77 | 27,943.33 |
| 56 | 359.60 | 151.83 | 27,583.73 |
| 57 | 361.55 | 149.87 | 27,222.18 |
| 58 | 363.52 | 147.91 | 26,858.66 |
| 59 | 365.49 | 145.93 | 26,493.17 |
| 60 | 367.48 | 143.95 | 26,125.69 |
| 61 | 369.47 | 141.95 | 25,756.22 |
| 62 | 371.48 | 139.94 | 25,384.74 |
| 63 | 373.50 | 137.92 | 25,011.24 |
| 64 | 375.53 | 135.89 | 24,635.71 |
| 65 | 377.57 | 133.85 | 24,258.14 |
| 66 | 379.62 | 131.80 | 23,878.51 |
| 67 | 381.68 | 129.74 | 23,496.83 |
| 68 | 383.76 | 127.67 | 23,113.07 |
| 69 | 385.84 | 125.58 | 22,727.23 |
| 70 | 387.94 | 123.48 | 22,339.29 |
| 71 | 390.05 | 121.38 | 21,949.24 |
| 72 | 392.17 | 119.26 | 21,557.08 |
| 73 | 394.30 | 117.13 | 21,162.78 |
| 74 | 396.44 | 114.98 | 20,766.34 |
| 75 | 398.59 | 112.83 | 20,367.75 |
| 76 | 400.76 | 110.66 | 19,966.99 |
| 77 | 402.94 | 108.49 | 19,564.05 |
| 78 | 405.13 | 106.30 | 19,158.93 |
| 79 | 407.33 | 104.10 | 18,751.60 |
| 80 | 409.54 | 101.88 | 18,342.06 |
| 81 | 411.77 | 99.66 | 17,930.29 |
| 82 | 414.00 | 97.42 | 17,516.29 |
| 83 | 416.25 | 95.17 | 17,100.04 |
| 84 | 418.51 | 92.91 | 16,681.52 |
| 85 | 420.79 | 90.64 | 16,260.74 |
| 86 | 423.07 | 88.35 | 15,837.66 |
| 87 | 425.37 | 86.05 | 15,412.29 |
| 88 | 427.68 | 83.74 | 14,984.61 |
| 89 | 430.01 | 81.42 | 14,554.60 |
| 90 | 432.34 | 79.08 | 14,122.25 |
| 91 | 434.69 | 76.73 | 13,687.56 |
| 92 | 437.05 | 74.37 | 13,250.51 |
| 93 | 439.43 | 71.99 | 12,811.08 |
| 94 | 441.82 | 69.61 | 12,369.26 |
| 95 | 444.22 | 67.21 | 11,925.04 |
| 96 | 446.63 | 64.79 | 11,478.41 |
| 97 | 449.06 | 62.37 | 11,029.35 |
| 98 | 451.50 | 59.93 | 10,577.86 |
| 99 | 453.95 | 57.47 | 10,123.90 |
| 100 | 456.42 | 55.01 | 9,667.49 |
| 101 | 458.90 | 52.53 | 9,208.59 |
| 102 | 461.39 | 50.03 | 8,747.20 |
| 103 | 463.90 | 47.53 | 8,283.30 |
| 104 | 466.42 | 45.01 | 7,816.88 |
| 105 | 468.95 | 42.47 | 7,347.93 |
| 106 | 471.50 | 39.92 | 6,876.43 |
| 107 | 474.06 | 37.36 | 6,402.37 |
| 108 | 476.64 | 34.79 | 5,925.73 |
| 109 | 479.23 | 32.20 | 5,446.50 |
| 110 | 481.83 | 29.59 | 4,964.67 |
| 111 | 484.45 | 26.97 | 4,480.22 |
| 112 | 487.08 | 24.34 | 3,993.14 |
| 113 | 489.73 | 21.70 | 3,503.41 |
| 114 | 492.39 | 19.04 | 3,011.03 |
| 115 | 495.06 | 16.36 | 2,515.96 |
| 116 | 497.75 | 13.67 | 2,018.21 |
| 117 | 500.46 | 10.97 | 1,517.75 |
| 118 | 503.18 | 8.25 | 1,014.57 |
| 119 | 505.91 | 5.51 | 508.66 |
| 120 | 508.66 | 2.76 | 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.