$25K Undergrad Loan with 6-Month Grace Period
A typical undergrad scenario: $25,000 at 5.5% with a 6-month grace period before 10 years of repayment. A pre-filled student loan calculator scenario.
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Your loan details
Interest accrues and capitalizes during grace
Applied 100% to principal
Results
Base payment
$279
Actual payment
$279
Total interest
$8,464
Interest saved
$0
Payoff time
120 months
Scheduled term, no extra payments
Total repayment
$33,464
Capitalized interest
$695
Balance at repayment start
$25,695
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Balance & interest over time
Month-by-month breakdown
| Month | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $279 | $161 | $118 | $25,534 |
| 2 | $279 | $162 | $117 | $25,373 |
| 3 | $279 | $163 | $116 | $25,210 |
| 4 | $279 | $163 | $116 | $25,047 |
| 5 | $279 | $164 | $115 | $24,883 |
| 6 | $279 | $165 | $114 | $24,718 |
| 7 | $279 | $166 | $113 | $24,552 |
| 8 | $279 | $166 | $113 | $24,386 |
| 9 | $279 | $167 | $112 | $24,219 |
| 10 | $279 | $168 | $111 | $24,051 |
| 11 | $279 | $169 | $110 | $23,882 |
| 12 | $279 | $169 | $109 | $23,713 |
| 13 | $279 | $170 | $109 | $23,543 |
| 14 | $279 | $171 | $108 | $23,372 |
| 15 | $279 | $172 | $107 | $23,200 |
| 16 | $279 | $173 | $106 | $23,027 |
| 17 | $279 | $173 | $106 | $22,854 |
| 18 | $279 | $174 | $105 | $22,680 |
| 19 | $279 | $175 | $104 | $22,505 |
| 20 | $279 | $176 | $103 | $22,329 |
| 21 | $279 | $177 | $102 | $22,153 |
| 22 | $279 | $177 | $102 | $21,976 |
| 23 | $279 | $178 | $101 | $21,797 |
| 24 | $279 | $179 | $100 | $21,618 |
| 25 | $279 | $180 | $99 | $21,439 |
| 26 | $279 | $181 | $98 | $21,258 |
| 27 | $279 | $181 | $97 | $21,077 |
| 28 | $279 | $182 | $97 | $20,894 |
| 29 | $279 | $183 | $96 | $20,711 |
| 30 | $279 | $184 | $95 | $20,527 |
| 31 | $279 | $185 | $94 | $20,343 |
| 32 | $279 | $186 | $93 | $20,157 |
| 33 | $279 | $186 | $92 | $19,970 |
| 34 | $279 | $187 | $92 | $19,783 |
| 35 | $279 | $188 | $91 | $19,595 |
| 36 | $279 | $189 | $90 | $19,406 |
| 37 | $279 | $190 | $89 | $19,216 |
| 38 | $279 | $191 | $88 | $19,025 |
| 39 | $279 | $192 | $87 | $18,833 |
| 40 | $279 | $193 | $86 | $18,641 |
| 41 | $279 | $193 | $85 | $18,448 |
| 42 | $279 | $194 | $85 | $18,253 |
| 43 | $279 | $195 | $84 | $18,058 |
| 44 | $279 | $196 | $83 | $17,862 |
| 45 | $279 | $197 | $82 | $17,665 |
| 46 | $279 | $198 | $81 | $17,467 |
| 47 | $279 | $199 | $80 | $17,268 |
| 48 | $279 | $200 | $79 | $17,068 |
| 49 | $279 | $201 | $78 | $16,868 |
| 50 | $279 | $202 | $77 | $16,666 |
| 51 | $279 | $202 | $76 | $16,464 |
| 52 | $279 | $203 | $75 | $16,260 |
| 53 | $279 | $204 | $75 | $16,056 |
| 54 | $279 | $205 | $74 | $15,851 |
| 55 | $279 | $206 | $73 | $15,645 |
| 56 | $279 | $207 | $72 | $15,437 |
| 57 | $279 | $208 | $71 | $15,229 |
| 58 | $279 | $209 | $70 | $15,020 |
| 59 | $279 | $210 | $69 | $14,810 |
| 60 | $279 | $211 | $68 | $14,599 |
| 61 | $279 | $212 | $67 | $14,387 |
| 62 | $279 | $213 | $66 | $14,174 |
| 63 | $279 | $214 | $65 | $13,961 |
| 64 | $279 | $215 | $64 | $13,746 |
| 65 | $279 | $216 | $63 | $13,530 |
| 66 | $279 | $217 | $62 | $13,313 |
| 67 | $279 | $218 | $61 | $13,095 |
| 68 | $279 | $219 | $60 | $12,876 |
| 69 | $279 | $220 | $59 | $12,656 |
| 70 | $279 | $221 | $58 | $12,436 |
| 71 | $279 | $222 | $57 | $12,214 |
| 72 | $279 | $223 | $56 | $11,991 |
| 73 | $279 | $224 | $55 | $11,767 |
| 74 | $279 | $225 | $54 | $11,542 |
| 75 | $279 | $226 | $53 | $11,316 |
| 76 | $279 | $227 | $52 | $11,089 |
| 77 | $279 | $228 | $51 | $10,861 |
| 78 | $279 | $229 | $50 | $10,632 |
| 79 | $279 | $230 | $49 | $10,402 |
| 80 | $279 | $231 | $48 | $10,171 |
| 81 | $279 | $232 | $47 | $9,938 |
| 82 | $279 | $233 | $46 | $9,705 |
| 83 | $279 | $234 | $44 | $9,471 |
| 84 | $279 | $235 | $43 | $9,235 |
| 85 | $279 | $237 | $42 | $8,999 |
| 86 | $279 | $238 | $41 | $8,761 |
| 87 | $279 | $239 | $40 | $8,522 |
| 88 | $279 | $240 | $39 | $8,282 |
| 89 | $279 | $241 | $38 | $8,042 |
| 90 | $279 | $242 | $37 | $7,800 |
| 91 | $279 | $243 | $36 | $7,556 |
| 92 | $279 | $244 | $35 | $7,312 |
| 93 | $279 | $245 | $34 | $7,067 |
| 94 | $279 | $246 | $32 | $6,820 |
| 95 | $279 | $248 | $31 | $6,573 |
| 96 | $279 | $249 | $30 | $6,324 |
| 97 | $279 | $250 | $29 | $6,074 |
| 98 | $279 | $251 | $28 | $5,823 |
| 99 | $279 | $252 | $27 | $5,571 |
| 100 | $279 | $253 | $26 | $5,318 |
| 101 | $279 | $254 | $24 | $5,063 |
| 102 | $279 | $256 | $23 | $4,807 |
| 103 | $279 | $257 | $22 | $4,551 |
| 104 | $279 | $258 | $21 | $4,293 |
| 105 | $279 | $259 | $20 | $4,033 |
| 106 | $279 | $260 | $18 | $3,773 |
| 107 | $279 | $262 | $17 | $3,512 |
| 108 | $279 | $263 | $16 | $3,249 |
| 109 | $279 | $264 | $15 | $2,985 |
| 110 | $279 | $265 | $14 | $2,720 |
| 111 | $279 | $266 | $12 | $2,453 |
| 112 | $279 | $268 | $11 | $2,186 |
| 113 | $279 | $269 | $10 | $1,917 |
| 114 | $279 | $270 | $9 | $1,647 |
| 115 | $279 | $271 | $8 | $1,375 |
| 116 | $279 | $273 | $6 | $1,103 |
| 117 | $279 | $274 | $5 | $829 |
| 118 | $279 | $275 | $4 | $554 |
| 119 | $279 | $276 | $3 | $278 |
| 120 | $279 | $278 | $1 | $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 $25K Undergrad Loan with 6-Month Grace Period.
Base payment
$279
Total interest
$8,464
Capitalized interest
$695
Total repayment
$33,464
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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