Student Loan Calculator

How to use this tool

Choose Standard or IDR. Enter balances, rates, and terms for each loan. For Standard, add an optional extra payment. For IDR, enter AGI, family size, poverty guideline, multiplier, discretionary %, and optional forgiveness years (e.g. 20/25).

Worked example

Two loans totaling $23,000: Standard with $100 extra cuts interest vs minimum-only. IDR with $55,000 AGI, family of 1, 10% discretionary, and 20-year forgiveness often lowers monthly payment while extending the timeline.

How it works

Combines up to three student loans for weighted APR and minimum payment. Standard mode simulates avalanche payoff with optional extra payment. IDR mode estimates a simplified SAVE/IBR-style payment from AGI, family size, poverty guideline × multiplier, and discretionary income percent, then projects interest through payoff or optional forgiveness years.

Limitations

Estimates only for educational purposes. Not financial, tax, or legal advice. Verify figures with your lender, advisor, or official IRS/SSA sources before making decisions.

Privacy and file handling

Your data stays on your device and is not uploaded.

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