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Student Loan Calculator

Calculate monthly payments for federal and private student loans, compare standard vs. graduated repayment plans, and model interest capitalization.

$
%
In-School Deferment
$
Standard 10-Year Fixed 120 Monthly Payments
Monthly Payment
$401.55
Fixed for entire 10-year duration
Total Interest Expense
$11,186
Total Repaid: $48,186
Starting Balance
$37,000
Interest Rate
5.5% APR
Payoff Duration
10.0 yrs
Total Interest
$11,186

Student Loan Amortization Trajectory

Balance reduction over the 10-year repayment schedule

Loan Balance
$0 $12,210 $24,420 $37,000 Yr 1 Yr 2 Yr 4 Yr 6 Yr 8 Yr 10

Student Loan Amortization Schedule

Principal reduction and interest charges

Period Payment Principal Interest Ending Balance
Year 1 $4,819 $2,855 $1,964 $34,145
Year 2 $4,819 $3,016 $1,803 $31,129
Year 3 $4,819 $3,186 $1,633 $27,943
Year 4 $4,819 $3,366 $1,453 $24,578
Year 5 $4,819 $3,556 $1,263 $21,022
Year 6 $4,819 $3,756 $1,062 $17,266
Year 7 $4,819 $3,968 $851 $13,298
Year 8 $4,819 $4,192 $627 $9,106
Year 9 $4,819 $4,428 $390 $4,678
Year 10 $4,819 $4,678 $141 $0

Understanding Federal & Private Student Loans

Student loans assist undergraduate and graduate students in covering tuition, campus housing, books, and living expenses. Federal loans (Direct Subsidized and Unsubsidized) offer fixed interest rates set by federal statute and income-driven repayment options, while private loans from banks and credit unions feature rates tied to market indices and borrower creditworthiness.

What is Interest Capitalization?

For unsubsidized federal loans and most private loans, interest begins accruing the moment funds are disbursed to your school. If you do not pay interest while enrolled in school or during the 6-month grace period, that unpaid accrued interest capitalizes (gets added directly to your original principal balance). You then pay interest on the interest for the remainder of the repayment term.

Standard Fixed vs. Graduated Repayment Plans

Standard Fixed Repayment

Equal monthly payments spread across 10 years (120 payments). Results in the lowest overall interest cost and fastest standard payoff.

Graduated Repayment

Payments start low and increase every two years. Helpful for entry-level professionals who anticipate substantial income growth, though total interest is higher.

Understanding your calculation

Method, example and limitations

How the calculation works

Student-loan projections estimate amortized payments on the entered balance, rate and repayment term. Different repayment arrangements can use different rules.

Example to check

A zero-interest balance of 12,000 repaid in 120 equal monthly payments requires 100 per month.

Before using the result

Accrued interest during study, capitalization, subsidies, income-driven plans and forgiveness are not captured by a simple fixed-payment estimate. Verify terms with the servicer.

Calculation methodology · Report a result that needs review