Student loan calculator
$454.60/month principal and interest
$14,552 total interest
Principal $40,000 Interest $14,552. 27¢ of every dollar paid goes to interest.
$40,000 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) | $454.60 | $14,552 |
| Tiered Standard (15 years) | $348.88 | $22,799 |
| Extended (15 years) | $348.88 | $22,799 |
| Extended (20 years) | $298.70 | $31,688 |
| Extended (25 years) | $270.58 | $41,175 |
Amortization schedule
First 12 months
| Month | Principal | Interest | Balance |
|---|---|---|---|
| 1 | $237.27 | $217.33 | $39,762.73 |
| 2 | $238.55 | $216.04 | $39,524.18 |
| 3 | $239.85 | $214.75 | $39,284.33 |
| 4 | $241.15 | $213.44 | $39,043.17 |
| 5 | $242.46 | $212.13 | $38,800.71 |
| 6 | $243.78 | $210.82 | $38,556.93 |
| 7 | $245.11 | $209.49 | $38,311.82 |
| 8 | $246.44 | $208.16 | $38,065.38 |
| 9 | $247.78 | $206.82 | $37,817.61 |
| 10 | $249.12 | $205.48 | $37,568.48 |
| 11 | $250.48 | $204.12 | $37,318.01 |
| 12 | $251.84 | $202.76 | $37,066.17 |
Year by year
| Year | Principal | Interest | Balance at year end |
|---|---|---|---|
| 1 | $2,934 | $2,521 | $37,066 |
| 2 | $3,131 | $2,324 | $33,935 |
| 3 | $3,341 | $2,114 | $30,594 |
| 4 | $3,566 | $1,889 | $27,028 |
| 5 | $3,805 | $1,650 | $23,223 |
| 6 | $4,061 | $1,394 | $19,162 |
| 7 | $4,334 | $1,121 | $14,828 |
| 8 | $4,625 | $830 | $10,203 |
| 9 | $4,936 | $519 | $5,267 |
| 10 | $5,267 | $188 | $0 |
| Total | $40,000 | $14,552 | $0 |
Full schedule, all 120 payments
| Month | Principal | Interest | Balance |
|---|---|---|---|
| 1 | 237.27 | 217.33 | 39,762.73 |
| 2 | 238.55 | 216.04 | 39,524.18 |
| 3 | 239.85 | 214.75 | 39,284.33 |
| 4 | 241.15 | 213.44 | 39,043.17 |
| 5 | 242.46 | 212.13 | 38,800.71 |
| 6 | 243.78 | 210.82 | 38,556.93 |
| 7 | 245.11 | 209.49 | 38,311.82 |
| 8 | 246.44 | 208.16 | 38,065.38 |
| 9 | 247.78 | 206.82 | 37,817.61 |
| 10 | 249.12 | 205.48 | 37,568.48 |
| 11 | 250.48 | 204.12 | 37,318.01 |
| 12 | 251.84 | 202.76 | 37,066.17 |
| 13 | 253.21 | 201.39 | 36,812.96 |
| 14 | 254.58 | 200.02 | 36,558.38 |
| 15 | 255.97 | 198.63 | 36,302.41 |
| 16 | 257.36 | 197.24 | 36,045.06 |
| 17 | 258.75 | 195.84 | 35,786.30 |
| 18 | 260.16 | 194.44 | 35,526.14 |
| 19 | 261.57 | 193.03 | 35,264.57 |
| 20 | 262.99 | 191.60 | 35,001.58 |
| 21 | 264.42 | 190.18 | 34,737.15 |
| 22 | 265.86 | 188.74 | 34,471.29 |
| 23 | 267.31 | 187.29 | 34,203.99 |
| 24 | 268.76 | 185.84 | 33,935.23 |
| 25 | 270.22 | 184.38 | 33,665.01 |
| 26 | 271.69 | 182.91 | 33,393.33 |
| 27 | 273.16 | 181.44 | 33,120.16 |
| 28 | 274.65 | 179.95 | 32,845.52 |
| 29 | 276.14 | 178.46 | 32,569.38 |
| 30 | 277.64 | 176.96 | 32,291.74 |
| 31 | 279.15 | 175.45 | 32,012.59 |
| 32 | 280.66 | 173.94 | 31,731.93 |
| 33 | 282.19 | 172.41 | 31,449.74 |
| 34 | 283.72 | 170.88 | 31,166.02 |
| 35 | 285.26 | 169.34 | 30,880.75 |
| 36 | 286.81 | 167.79 | 30,593.94 |
| 37 | 288.37 | 166.23 | 30,305.57 |
| 38 | 289.94 | 164.66 | 30,015.63 |
| 39 | 291.51 | 163.08 | 29,724.12 |
| 40 | 293.10 | 161.50 | 29,431.02 |
| 41 | 294.69 | 159.91 | 29,136.33 |
| 42 | 296.29 | 158.31 | 28,840.04 |
| 43 | 297.90 | 156.70 | 28,542.13 |
| 44 | 299.52 | 155.08 | 28,242.61 |
| 45 | 301.15 | 153.45 | 27,941.47 |
| 46 | 302.78 | 151.82 | 27,638.68 |
| 47 | 304.43 | 150.17 | 27,334.25 |
| 48 | 306.08 | 148.52 | 27,028.17 |
| 49 | 307.75 | 146.85 | 26,720.42 |
| 50 | 309.42 | 145.18 | 26,411.01 |
| 51 | 311.10 | 143.50 | 26,099.91 |
| 52 | 312.79 | 141.81 | 25,787.12 |
| 53 | 314.49 | 140.11 | 25,472.63 |
| 54 | 316.20 | 138.40 | 25,156.43 |
| 55 | 317.92 | 136.68 | 24,838.51 |
| 56 | 319.64 | 134.96 | 24,518.87 |
| 57 | 321.38 | 133.22 | 24,197.49 |
| 58 | 323.13 | 131.47 | 23,874.37 |
| 59 | 324.88 | 129.72 | 23,549.48 |
| 60 | 326.65 | 127.95 | 23,222.84 |
| 61 | 328.42 | 126.18 | 22,894.42 |
| 62 | 330.21 | 124.39 | 22,564.21 |
| 63 | 332.00 | 122.60 | 22,232.21 |
| 64 | 333.80 | 120.80 | 21,898.41 |
| 65 | 335.62 | 118.98 | 21,562.79 |
| 66 | 337.44 | 117.16 | 21,225.35 |
| 67 | 339.27 | 115.32 | 20,886.07 |
| 68 | 341.12 | 113.48 | 20,544.95 |
| 69 | 342.97 | 111.63 | 20,201.98 |
| 70 | 344.83 | 109.76 | 19,857.15 |
| 71 | 346.71 | 107.89 | 19,510.44 |
| 72 | 348.59 | 106.01 | 19,161.85 |
| 73 | 350.49 | 104.11 | 18,811.36 |
| 74 | 352.39 | 102.21 | 18,458.97 |
| 75 | 354.31 | 100.29 | 18,104.66 |
| 76 | 356.23 | 98.37 | 17,748.43 |
| 77 | 358.17 | 96.43 | 17,390.27 |
| 78 | 360.11 | 94.49 | 17,030.16 |
| 79 | 362.07 | 92.53 | 16,668.09 |
| 80 | 364.04 | 90.56 | 16,304.05 |
| 81 | 366.01 | 88.59 | 15,938.04 |
| 82 | 368.00 | 86.60 | 15,570.04 |
| 83 | 370.00 | 84.60 | 15,200.03 |
| 84 | 372.01 | 82.59 | 14,828.02 |
| 85 | 374.03 | 80.57 | 14,453.99 |
| 86 | 376.07 | 78.53 | 14,077.92 |
| 87 | 378.11 | 76.49 | 13,699.81 |
| 88 | 380.16 | 74.44 | 13,319.65 |
| 89 | 382.23 | 72.37 | 12,937.42 |
| 90 | 384.31 | 70.29 | 12,553.11 |
| 91 | 386.39 | 68.21 | 12,166.72 |
| 92 | 388.49 | 66.11 | 11,778.23 |
| 93 | 390.60 | 64.00 | 11,387.62 |
| 94 | 392.73 | 61.87 | 10,994.90 |
| 95 | 394.86 | 59.74 | 10,600.04 |
| 96 | 397.01 | 57.59 | 10,203.03 |
| 97 | 399.16 | 55.44 | 9,803.87 |
| 98 | 401.33 | 53.27 | 9,402.54 |
| 99 | 403.51 | 51.09 | 8,999.03 |
| 100 | 405.70 | 48.89 | 8,593.32 |
| 101 | 407.91 | 46.69 | 8,185.41 |
| 102 | 410.12 | 44.47 | 7,775.29 |
| 103 | 412.35 | 42.25 | 7,362.93 |
| 104 | 414.59 | 40.01 | 6,948.34 |
| 105 | 416.85 | 37.75 | 6,531.49 |
| 106 | 419.11 | 35.49 | 6,112.38 |
| 107 | 421.39 | 33.21 | 5,690.99 |
| 108 | 423.68 | 30.92 | 5,267.32 |
| 109 | 425.98 | 28.62 | 4,841.34 |
| 110 | 428.29 | 26.30 | 4,413.04 |
| 111 | 430.62 | 23.98 | 3,982.42 |
| 112 | 432.96 | 21.64 | 3,549.46 |
| 113 | 435.31 | 19.29 | 3,114.15 |
| 114 | 437.68 | 16.92 | 2,676.47 |
| 115 | 440.06 | 14.54 | 2,236.41 |
| 116 | 442.45 | 12.15 | 1,793.96 |
| 117 | 444.85 | 9.75 | 1,349.11 |
| 118 | 447.27 | 7.33 | 901.84 |
| 119 | 449.70 | 4.90 | 452.14 |
| 120 | 452.14 | 2.46 | 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.