Student Loan vs Invest Calculator
Pay loan or invest?
Compare paying student loans vs investing extra money. Enter extra monthly amount and student loan rate to see which approach yields more based on rates.
What this tool does
This tool compares the future value of investing extra vs paying student loan early. Shows which approach yields more based on rates.
Enter Values
Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Extra cash can pay student loans or go to investments. Student loans at 6% vs investments at 7% look close but compound differently. This calculator compares both uses over years.
300 extra monthly over 20 years: invested at 7% = 156k. Paying 6% student loan extra saves ~36k interest over same period. Invest wins by 120k - but requires discipline and market acceptance.
Emotional factor matters too. Debt-free feels good. Some people prefer certain interest savings over probable investment gains. Both are defensible - the tool shows the math clearly.
Run it with sensible defaults
Using extra monthly amount of 300, student loan rate of 6%, investment return of 7%, years remaining of 20, the calculation works out to 154,118.00. Nudge the inputs toward your own situation and the output recalculates instantly. The defaults are meant as a starting point, not a recommendation.
The levers in this calculation
The inputs — Extra Monthly Amount, Student Loan Rate, Investment Return, Years Remaining, and Loan Balance — do not pull with equal force. The rate and the time horizon usually dominate — compounding means a small change in either reshapes the final figure more than a similar shift in contribution size. Test this by doubling one input at a time.
How the math works
Invest: monthly contribution annuity at investment rate. Loan: estimated interest saved from early payoff. Difference shows winner. The working is transparent — you can verify every step yourself in the formula section below. No black box, no opaque "proprietary model".
Reading the output honestly
The payoff date assumes every payment lands on time and at the amount you entered. In reality, months with unexpected expenses happen. Treat the figure as the best-case timeline and add a buffer for life if you want a realistic target.
What this doesn't capture
Real payoff journeys include missed payments, fee changes, balance transfers, and promotional rates that reset. The calculation assumes a steady plan; reality is rarely that clean. Use the figure as the best-case plan against which actual progress gets measured.
£300 £/mo at 6% loan vs 7% invest × 20 yearsyrs = $154,118.00.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
Invest: monthly contribution annuity at investment rate. Loan: estimated interest saved from early payoff. Difference shows winner.
References
Frequently Asked Questions
What if loan rate is higher than investment?
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