Student Loan Calculator

Introduction

This Student Loan Calculator estimates fixed monthly payment, total repayment, and total interest for a student loan using standard equal-payment amortization. Enter principal balance, fixed APR, and repayment term in years or months to model the classic ten-year standard plan or alternative lengths. It does not fetch your NSLDS file or apply income-driven formulas; enter numbers from your servicer disclosure. Federal borrowers weighing income-driven relief against standard fixed payments should treat this output as the fixed-payment baseline only.

Who this calculator is for

Graduates holding a single combined balance who want the standard-plan payment before calling the servicer belong here. Parents co-signing private loans use it to see what $42,000 at 6.2% over ten years implies for household cash flow.

Financial aid officers illustrating default ten-year math in exit counseling can project quickly. For college cost escalation before borrowing, use the college cost calculator. For household-wide debt ordering, see the Debt Payoff Calculator.

What it estimates

Standard repayment treats the loan like a fixed installment note: payment solves from balance, monthly rate, and count of payments. Interest accrues on declining balance; no subsidized in-school deferment period unless you delay start manually. Capitalized interest from forbearance is not added unless you increase the starting balance field to match your servicer payoff quote after capitalization.

Income-driven plans, graduated plans, forgiveness programs, employer repayment, and tax deductions are not modeled. Multiple loans with different rates should be run separately or weighted manually.

Inputs explained

Use servicer payoff amount and rate after grace period if repayment is starting now.

• Loan balance: Total owed on the loan being modeled, such as $42,000.
• Interest rate: Fixed APR on the disclosure, such as 6.2%.
• Repayment term: Standard is 120 months (10 years); enter other terms to compare.
• Grace period (optional): Months before first payment if tool accrues interest during grace.
• Extra payment (optional): Monthly add-on to principal during repayment.

How to read the results

Monthly payment is the fixed installment for the term chosen. Total interest can rival a year of payments on large balances at mid-six percent rates over ten years. Schedule shows when half the principal is gone, often well past halfway through the term due to front-loaded interest.

Compare ten-year payment with a twenty-five year extended plan by changing term only; payment falls but total interest rises sharply. Graduates entering public service should not rely on this page for PSLF payment counts; servicer IDR tools track qualifying payments separately from standard amortization shown here.

Worked example

$42,000 at 6.2% APR on a ten-year (120 month) standard plan produces a payment near $470. Total repaid about $56,400, meaning roughly $14,400 of interest over the decade. First-month interest near $217 leaves about $253 toward principal.

Pay $570 instead ($100 extra) and recalculate. Payoff arrives near year eight with interest savings over $2,500. Confirm servicer applies extra to principal, not future installments only.

Practical use cases

Decide whether to pay minimum while building emergency fund or attack loans first. Compare refinancing quote at 4.9% for seven years versus keeping federal protections at 6.2% for ten.

Estimate whether starting salary supports payment plus rent using the Budget Calculator. Inflation on starting wages over ten years connects to the Inflation Calculator separately.

Limitations and related tools

IDR plans cap payment at percent of discretionary income with forgiveness tail not shown here. PSLF qualifying payments and subsidized interest during school need servicer tools. Variable-rate private loans require rerunning when rate resets.

Forward amortization detail: Repayment Calculator. Private refinance with origination fee: Personal Loan Calculator. Multiple cards plus loans: Debt Payoff Calculator.

How It Works

1. Pull servicer numbers. Enter current balance and fixed APR from your monthly statement or exit counseling sheet.
2. Set repayment term. Use 120 months for standard ten-year plan unless comparing alternatives.
3. Calculate payment and interest. Click Calculate and read monthly payment and lifetime interest before opening schedule.
4. Test extra payments. Add monthly extra you could sustain after rent and savings; recalculate payoff date.

Formula and methodology

The Student Loan Calculator uses this identity for the scenario you enter. A bank, payroll system, or tax program may round on a 360-day year or average daily balance, so a statement can differ by a small amount.