Student Loan Calculator
Calculate federal and private student loan amortization schedules. Model standard repayment vs accelerated prepayment to eliminate education debt years early.
Student Loan Repayment & Prepayment Calculator
Standard 10-year repayment schedule vs accelerated debt elimination
Loan Inputs
Principal vs Interest Breakdown
Student Loan Repayment Strategies: Standard, SAVE & Accelerated Payoff
Navigating student loan debt requires balancing standard 10-year repayment schedules against federal income-driven repayment (IDR) plans like the SAVE plan, Public Service Loan Forgiveness (PSLF), and aggressive private loan refinancing.
Avalanche vs. Snowball Debt Elimination Methods
Borrowers with multiple student loan disbursements should adopt a structured repayment strategy:
Debt Avalanche: Direct all extra principal prepayments to the loan with the highest nominal interest rate (e.g., 8.5% Graduate PLUS loan). Mathematically saves the most money.
Debt Snowball: Direct extra payments toward the smallest dollar balance loan first. Delivers rapid psychological wins as individual accounts are closed.
Step-by-Step Instructions
Input Loan Balances
Enter your total outstanding student loan balance across all undergraduate and graduate loans.
Set Interest Rate & Term
Specify the annual interest rate (fixed or variable APR) and standard repayment term (e.g., 10, 20, or 25 years).
Add Accelerated Prepayments
Input any planned extra monthly principal contributions to see immediate payoff acceleration.
Compare Repayment Strategies
Review the amortization schedule comparing the standard 10-year repayment plan against income-driven and accelerated repayment strategies.
Key Features & Capabilities
- Standard 10-Year vs Extended & Income-Driven (IDR/SAVE) comparison models
- Exact interest capitalization calculations during grace periods and deferment
- Student loan interest tax deduction threshold ($2,500 MAGI phaseout) analysis
- Principal prepayment acceleration schedule showing total interest and time saved
Frequently Asked Questions
How is interest calculated on federal versus private student loans?
Federal student loans use simple daily interest based on the exact formula: Daily Interest = (Outstanding Principal × Annual Interest Rate) / 365.25. Interest accrues daily and is billed monthly. Private student loans may use either simple daily interest or compound monthly interest, with variable rates pegged to SOFR (Secured Overnight Financing Rate) plus a fixed margin.
What is interest capitalization and when does it occur?
Interest capitalization occurs when unpaid accrued interest is added to your original principal loan balance. Once capitalized, future interest accrues on the new, larger balance. Capitalization typically happens at the end of a college enrollment grace period, after forbearance ends, or when leaving certain Income-Driven Repayment (IDR) plans.
How does the student loan interest tax deduction work?
Under IRS rules, eligible borrowers can deduct up to $2,500 of student loan interest paid per calendar year as an above-the-line deduction on Form 1040. The deduction phases out gradually for single filers with Modified Adjusted Gross Income (MAGI) between $80,000 and $95,000, and for married couples filing jointly between $165,000 and $195,000.
Is it better to refinance federal student loans with a private lender?
Refinancing federal student loans into a private loan can lower your interest rate and monthly payment if you have a strong credit profile. However, refinancing permanently forfeits all federal borrower protections, including Public Service Loan Forgiveness (PSLF), Income-Driven Repayment (IDR/SAVE) plans, and generous deferment or forbearance options.
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