Parent PLUS Loan — $40K at 8%
A Parent PLUS scenario: $40,000 borrowed at 8% over 10 years. A pre-filled student loan calculator scenario for parents financing a child's education.
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Your loan details
Interest accrues and capitalizes during grace
Applied 100% to principal
Results
Base payment
$485
Actual payment
$485
Total interest
$18,237
Interest saved
$0
Payoff time
120 months
Scheduled term, no extra payments
Total repayment
$58,237
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Balance & interest over time
Month-by-month breakdown
| Month | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $485 | $219 | $267 | $39,781 |
| 2 | $485 | $220 | $265 | $39,561 |
| 3 | $485 | $222 | $264 | $39,340 |
| 4 | $485 | $223 | $262 | $39,117 |
| 5 | $485 | $225 | $261 | $38,892 |
| 6 | $485 | $226 | $259 | $38,666 |
| 7 | $485 | $228 | $258 | $38,439 |
| 8 | $485 | $229 | $256 | $38,209 |
| 9 | $485 | $231 | $255 | $37,979 |
| 10 | $485 | $232 | $253 | $37,747 |
| 11 | $485 | $234 | $252 | $37,513 |
| 12 | $485 | $235 | $250 | $37,278 |
| 13 | $485 | $237 | $249 | $37,041 |
| 14 | $485 | $238 | $247 | $36,803 |
| 15 | $485 | $240 | $245 | $36,563 |
| 16 | $485 | $242 | $244 | $36,321 |
| 17 | $485 | $243 | $242 | $36,078 |
| 18 | $485 | $245 | $241 | $35,833 |
| 19 | $485 | $246 | $239 | $35,587 |
| 20 | $485 | $248 | $237 | $35,339 |
| 21 | $485 | $250 | $236 | $35,089 |
| 22 | $485 | $251 | $234 | $34,838 |
| 23 | $485 | $253 | $232 | $34,585 |
| 24 | $485 | $255 | $231 | $34,330 |
| 25 | $485 | $256 | $229 | $34,073 |
| 26 | $485 | $258 | $227 | $33,815 |
| 27 | $485 | $260 | $225 | $33,555 |
| 28 | $485 | $262 | $224 | $33,294 |
| 29 | $485 | $263 | $222 | $33,030 |
| 30 | $485 | $265 | $220 | $32,765 |
| 31 | $485 | $267 | $218 | $32,498 |
| 32 | $485 | $269 | $217 | $32,230 |
| 33 | $485 | $270 | $215 | $31,959 |
| 34 | $485 | $272 | $213 | $31,687 |
| 35 | $485 | $274 | $211 | $31,413 |
| 36 | $485 | $276 | $209 | $31,137 |
| 37 | $485 | $278 | $208 | $30,859 |
| 38 | $485 | $280 | $206 | $30,580 |
| 39 | $485 | $281 | $204 | $30,298 |
| 40 | $485 | $283 | $202 | $30,015 |
| 41 | $485 | $285 | $200 | $29,730 |
| 42 | $485 | $287 | $198 | $29,443 |
| 43 | $485 | $289 | $196 | $29,154 |
| 44 | $485 | $291 | $194 | $28,863 |
| 45 | $485 | $293 | $192 | $28,570 |
| 46 | $485 | $295 | $190 | $28,275 |
| 47 | $485 | $297 | $189 | $27,978 |
| 48 | $485 | $299 | $187 | $27,679 |
| 49 | $485 | $301 | $185 | $27,379 |
| 50 | $485 | $303 | $183 | $27,076 |
| 51 | $485 | $305 | $181 | $26,771 |
| 52 | $485 | $307 | $178 | $26,464 |
| 53 | $485 | $309 | $176 | $26,155 |
| 54 | $485 | $311 | $174 | $25,844 |
| 55 | $485 | $313 | $172 | $25,531 |
| 56 | $485 | $315 | $170 | $25,216 |
| 57 | $485 | $317 | $168 | $24,899 |
| 58 | $485 | $319 | $166 | $24,580 |
| 59 | $485 | $321 | $164 | $24,258 |
| 60 | $485 | $324 | $162 | $23,935 |
| 61 | $485 | $326 | $160 | $23,609 |
| 62 | $485 | $328 | $157 | $23,281 |
| 63 | $485 | $330 | $155 | $22,951 |
| 64 | $485 | $332 | $153 | $22,619 |
| 65 | $485 | $335 | $151 | $22,284 |
| 66 | $485 | $337 | $149 | $21,947 |
| 67 | $485 | $339 | $146 | $21,608 |
| 68 | $485 | $341 | $144 | $21,267 |
| 69 | $485 | $344 | $142 | $20,924 |
| 70 | $485 | $346 | $139 | $20,578 |
| 71 | $485 | $348 | $137 | $20,230 |
| 72 | $485 | $350 | $135 | $19,879 |
| 73 | $485 | $353 | $133 | $19,526 |
| 74 | $485 | $355 | $130 | $19,171 |
| 75 | $485 | $358 | $128 | $18,814 |
| 76 | $485 | $360 | $125 | $18,454 |
| 77 | $485 | $362 | $123 | $18,092 |
| 78 | $485 | $365 | $121 | $17,727 |
| 79 | $485 | $367 | $118 | $17,360 |
| 80 | $485 | $370 | $116 | $16,990 |
| 81 | $485 | $372 | $113 | $16,618 |
| 82 | $485 | $375 | $111 | $16,244 |
| 83 | $485 | $377 | $108 | $15,867 |
| 84 | $485 | $380 | $106 | $15,487 |
| 85 | $485 | $382 | $103 | $15,105 |
| 86 | $485 | $385 | $101 | $14,720 |
| 87 | $485 | $387 | $98 | $14,333 |
| 88 | $485 | $390 | $96 | $13,944 |
| 89 | $485 | $392 | $93 | $13,551 |
| 90 | $485 | $395 | $90 | $13,156 |
| 91 | $485 | $398 | $88 | $12,759 |
| 92 | $485 | $400 | $85 | $12,358 |
| 93 | $485 | $403 | $82 | $11,955 |
| 94 | $485 | $406 | $80 | $11,550 |
| 95 | $485 | $408 | $77 | $11,142 |
| 96 | $485 | $411 | $74 | $10,730 |
| 97 | $485 | $414 | $72 | $10,317 |
| 98 | $485 | $417 | $69 | $9,900 |
| 99 | $485 | $419 | $66 | $9,481 |
| 100 | $485 | $422 | $63 | $9,059 |
| 101 | $485 | $425 | $60 | $8,634 |
| 102 | $485 | $428 | $58 | $8,206 |
| 103 | $485 | $431 | $55 | $7,775 |
| 104 | $485 | $433 | $52 | $7,342 |
| 105 | $485 | $436 | $49 | $6,906 |
| 106 | $485 | $439 | $46 | $6,466 |
| 107 | $485 | $442 | $43 | $6,024 |
| 108 | $485 | $445 | $40 | $5,579 |
| 109 | $485 | $448 | $37 | $5,131 |
| 110 | $485 | $451 | $34 | $4,680 |
| 111 | $485 | $454 | $31 | $4,226 |
| 112 | $485 | $457 | $28 | $3,769 |
| 113 | $485 | $460 | $25 | $3,308 |
| 114 | $485 | $463 | $22 | $2,845 |
| 115 | $485 | $466 | $19 | $2,379 |
| 116 | $485 | $469 | $16 | $1,909 |
| 117 | $485 | $473 | $13 | $1,437 |
| 118 | $485 | $476 | $10 | $961 |
| 119 | $485 | $479 | $6 | $482 |
| 120 | $485 | $482 | $3 | $0 |
Features
- Monthly payment estimate
- Grace-period interest capitalization
- Extra-payment savings (time & interest)
- Month-by-month repayment schedule
- Shareable result card + CSV export
Scenario Benchmark
Key figures for Parent PLUS Loan — $40K at 8%.
Base payment
$485
Total interest
$18,237
Total repayment
$58,237
Frequently asked questions
How the maths works
A student loan is a fixed-rate amortizing loan. A grace period lets interest accumulate and capitalize before payments start, so the balance you repay can exceed what you borrowed.
- 1During the grace period, monthly interest accrues on the balance and is capitalized (added to principal) when repayment begins.
- 2Base payment M = L·r / (1 − (1+r)^−n), where L is the capitalized balance, r the monthly rate and n the term in months.
- 3Each month, interest = balance·r and the rest of the payment reduces principal.
- 4An extra monthly payment goes 100% to principal, shortening the term and cutting total interest.
Figures are illustrative and exclude fees, deferment and forgiveness programs. Not financial advice.
Everything you need to know
What is interest capitalization?
During a grace period (typically six months after graduation), no payments are due but interest keeps accruing on unsubsidized loans.
When repayment starts, that accrued interest is added to your principal — you then pay interest on interest, which is why the balance can grow before you make a single payment.
Extra payments are the fastest lever
Every extra dollar you pay goes straight to principal, which cuts future interest and shortens the term — often by years.
The calculator shows exactly how many months (and how much interest) an extra monthly payment saves on your specific loan.
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