Education & SchoolPayment Planner
Student Loan Payment Calculator
Estimate monthly student loan installments across 10-year, 15-year, 20-year, and 25-year terms with in-school interest capitalization options.
Calculation Results
Payment & Capitalization Calculation
Starting Repayment Principal = Original Borrowed + (Original × [APR/12] × Deferment Months)- Unsubsidized federal and private loans accrue simple interest while enrolled in college.
- Upon entering repayment, unpaid accrued interest capitalizes (adds to the principal balance).
- Longer terms (20–25 years) lower monthly payments but dramatically inflate total lifetime interest.
- Provides quick monthly budgeting benchmarks for graduating college seniors.
Step-by-Step Worked Example
Scenario: Student with $42,000 unsubsidized loan balance entering repayment after 4 years of college at 6.5% APR.
Calculation Steps:
- Calculate Accrued In-School Interest: $42,000 × (0.065 / 12) × 48 = $10,920.
- Capitalized Principal at Repayment: $42,000 + $10,920 = $52,920.
- Calculate 10-Year Payment on $52,920: $600.86 per month.
- Total Repaid: $600.86 × 120 = $72,103 ($30,103 total interest).
Result: Accruing $10,920 in college interest increases your repayment principal to $52,920, resulting in a monthly payment of $600.86 ($72,103 total repayment).
How to Use This Calculator
- 1Enter total original loan amount borrowed during college.
- 2Specify interest rate and whether your loans are subsidized or unsubsidized.
- 3Choose your target repayment duration (10, 15, 20, or 25 years).
Assumptions & Limitations
- Subsidized federal loans do not accrue interest while enrolled at least half-time.
- Unsubsidized and private loans accrue interest from the date of loan disbursement.
Frequently Asked Questions
Should I pay interest while in college?
Yes! Paying just the monthly interest ($30–$80/mo) while in school prevents interest capitalization upon graduation, saving thousands of dollars over a 10-year term.
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