$30K Student Loan — 10 Years at 6.5%
The standard federal-loan benchmark: $30,000 at 6.5% repaid over 10 years. 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
$341
Actual payment
$341
Total interest
$10,877
Interest saved
$0
Payoff time
120 months
Scheduled term, no extra payments
Total repayment
$40,877
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Balance & interest over time
Month-by-month breakdown
| Month | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $341 | $178 | $163 | $29,822 |
| 2 | $341 | $179 | $162 | $29,643 |
| 3 | $341 | $180 | $161 | $29,463 |
| 4 | $341 | $181 | $160 | $29,282 |
| 5 | $341 | $182 | $159 | $29,100 |
| 6 | $341 | $183 | $158 | $28,917 |
| 7 | $341 | $184 | $157 | $28,733 |
| 8 | $341 | $185 | $156 | $28,548 |
| 9 | $341 | $186 | $155 | $28,362 |
| 10 | $341 | $187 | $154 | $28,175 |
| 11 | $341 | $188 | $153 | $27,986 |
| 12 | $341 | $189 | $152 | $27,797 |
| 13 | $341 | $190 | $151 | $27,607 |
| 14 | $341 | $191 | $150 | $27,416 |
| 15 | $341 | $192 | $149 | $27,224 |
| 16 | $341 | $193 | $147 | $27,031 |
| 17 | $341 | $194 | $146 | $26,837 |
| 18 | $341 | $195 | $145 | $26,641 |
| 19 | $341 | $196 | $144 | $26,445 |
| 20 | $341 | $197 | $143 | $26,248 |
| 21 | $341 | $198 | $142 | $26,049 |
| 22 | $341 | $200 | $141 | $25,850 |
| 23 | $341 | $201 | $140 | $25,649 |
| 24 | $341 | $202 | $139 | $25,447 |
| 25 | $341 | $203 | $138 | $25,245 |
| 26 | $341 | $204 | $137 | $25,041 |
| 27 | $341 | $205 | $136 | $24,836 |
| 28 | $341 | $206 | $135 | $24,630 |
| 29 | $341 | $207 | $133 | $24,422 |
| 30 | $341 | $208 | $132 | $24,214 |
| 31 | $341 | $209 | $131 | $24,004 |
| 32 | $341 | $211 | $130 | $23,794 |
| 33 | $341 | $212 | $129 | $23,582 |
| 34 | $341 | $213 | $128 | $23,369 |
| 35 | $341 | $214 | $127 | $23,155 |
| 36 | $341 | $215 | $125 | $22,940 |
| 37 | $341 | $216 | $124 | $22,723 |
| 38 | $341 | $218 | $123 | $22,506 |
| 39 | $341 | $219 | $122 | $22,287 |
| 40 | $341 | $220 | $121 | $22,067 |
| 41 | $341 | $221 | $120 | $21,846 |
| 42 | $341 | $222 | $118 | $21,624 |
| 43 | $341 | $224 | $117 | $21,400 |
| 44 | $341 | $225 | $116 | $21,176 |
| 45 | $341 | $226 | $115 | $20,950 |
| 46 | $341 | $227 | $113 | $20,722 |
| 47 | $341 | $228 | $112 | $20,494 |
| 48 | $341 | $230 | $111 | $20,264 |
| 49 | $341 | $231 | $110 | $20,034 |
| 50 | $341 | $232 | $109 | $19,801 |
| 51 | $341 | $233 | $107 | $19,568 |
| 52 | $341 | $235 | $106 | $19,333 |
| 53 | $341 | $236 | $105 | $19,097 |
| 54 | $341 | $237 | $103 | $18,860 |
| 55 | $341 | $238 | $102 | $18,622 |
| 56 | $341 | $240 | $101 | $18,382 |
| 57 | $341 | $241 | $100 | $18,141 |
| 58 | $341 | $242 | $98 | $17,899 |
| 59 | $341 | $244 | $97 | $17,655 |
| 60 | $341 | $245 | $96 | $17,410 |
| 61 | $341 | $246 | $94 | $17,164 |
| 62 | $341 | $248 | $93 | $16,916 |
| 63 | $341 | $249 | $92 | $16,667 |
| 64 | $341 | $250 | $90 | $16,416 |
| 65 | $341 | $252 | $89 | $16,165 |
| 66 | $341 | $253 | $88 | $15,912 |
| 67 | $341 | $254 | $86 | $15,657 |
| 68 | $341 | $256 | $85 | $15,401 |
| 69 | $341 | $257 | $83 | $15,144 |
| 70 | $341 | $259 | $82 | $14,886 |
| 71 | $341 | $260 | $81 | $14,626 |
| 72 | $341 | $261 | $79 | $14,364 |
| 73 | $341 | $263 | $78 | $14,101 |
| 74 | $341 | $264 | $76 | $13,837 |
| 75 | $341 | $266 | $75 | $13,571 |
| 76 | $341 | $267 | $74 | $13,304 |
| 77 | $341 | $269 | $72 | $13,036 |
| 78 | $341 | $270 | $71 | $12,766 |
| 79 | $341 | $272 | $69 | $12,494 |
| 80 | $341 | $273 | $68 | $12,221 |
| 81 | $341 | $274 | $66 | $11,947 |
| 82 | $341 | $276 | $65 | $11,671 |
| 83 | $341 | $277 | $63 | $11,393 |
| 84 | $341 | $279 | $62 | $11,114 |
| 85 | $341 | $280 | $60 | $10,834 |
| 86 | $341 | $282 | $59 | $10,552 |
| 87 | $341 | $283 | $57 | $10,268 |
| 88 | $341 | $285 | $56 | $9,983 |
| 89 | $341 | $287 | $54 | $9,697 |
| 90 | $341 | $288 | $53 | $9,409 |
| 91 | $341 | $290 | $51 | $9,119 |
| 92 | $341 | $291 | $49 | $8,828 |
| 93 | $341 | $293 | $48 | $8,535 |
| 94 | $341 | $294 | $46 | $8,241 |
| 95 | $341 | $296 | $45 | $7,945 |
| 96 | $341 | $298 | $43 | $7,647 |
| 97 | $341 | $299 | $41 | $7,348 |
| 98 | $341 | $301 | $40 | $7,047 |
| 99 | $341 | $302 | $38 | $6,744 |
| 100 | $341 | $304 | $37 | $6,440 |
| 101 | $341 | $306 | $35 | $6,135 |
| 102 | $341 | $307 | $33 | $5,827 |
| 103 | $341 | $309 | $32 | $5,518 |
| 104 | $341 | $311 | $30 | $5,207 |
| 105 | $341 | $312 | $28 | $4,895 |
| 106 | $341 | $314 | $27 | $4,581 |
| 107 | $341 | $316 | $25 | $4,265 |
| 108 | $341 | $318 | $23 | $3,947 |
| 109 | $341 | $319 | $21 | $3,628 |
| 110 | $341 | $321 | $20 | $3,307 |
| 111 | $341 | $323 | $18 | $2,984 |
| 112 | $341 | $324 | $16 | $2,660 |
| 113 | $341 | $326 | $14 | $2,334 |
| 114 | $341 | $328 | $13 | $2,006 |
| 115 | $341 | $330 | $11 | $1,676 |
| 116 | $341 | $332 | $9 | $1,344 |
| 117 | $341 | $333 | $7 | $1,011 |
| 118 | $341 | $335 | $5 | $676 |
| 119 | $341 | $337 | $4 | $339 |
| 120 | $341 | $339 | $2 | $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 $30K Student Loan — 10 Years at 6.5%.
Base payment
$341
Total interest
$10,877
Total repayment
$40,877
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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