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Student Loan Calculator

Project a student loan balance after an interest-accruing deferral period and estimate subsequent payments.

01 / YOUR NUMBERS

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02 / YOUR ESTIMATE

Results & breakdown

Monthly principal & interest$437.98Based on your numbers, not a rate quote or guarantee
Balance after deferment$39,450.59
Loan principal$39,450.59
Total interest$13,107.40
Total payments$52,557.99
Months to pay off120 months

Visual breakdown

Illustrative projection
Preparing your chart…

Assumptions & limitations

  • Fixed-rate monthly amortization; fees, taxes and insurance are excluded unless shown separately.
  • Deferred interest compounds monthly in this simplified model; actual student loan rules differ.

Currency selection changes display formatting only. It does not convert money using an exchange rate.

Understanding your student loan calculator results

Project a student loan balance after an interest-accruing deferral period and estimate subsequent payments. The main result is a starting point for your decision. Review the other figures in the results panel to understand how much of the outcome comes from your inputs and which assumptions have the largest effect.

A change in rate, time horizon or recurring amount can produce a different answer. Try a second scenario before using an estimate in a household or business decision.

How the calculation works

Interest accumulates monthly during the chosen deferral period before a standard amortization repayment schedule begins.

KEY EQUATION / METHOD

Balance after deferral = original principal × (1 + monthly rate)^(deferral months); repayment then uses amortization.

Inputs are validated in your browser, and results use standard mathematical models with the assumptions displayed alongside the output. Depending on the calculator, the chart may show a declining balance, growing savings or a comparison between costs. Read the calculation methodology.

A practical example

Two years of interest accrual increases the amount you may eventually repay.

Use the starting values above to reproduce a scenario, then replace them with your figures. The example is illustrative, not a forecast of rates or market performance.

Important assumptions and limitations

This tool uses numbers you supply and does not fetch personal account information or live lender offers. Interest, inflation, taxes, market returns, lender fees and legal rules vary by product and location. Where a figure is not an actual quote or official rate, treat it as a hypothetical input and verify it independently.

Official resources and further reading

For independent financial context, review a primary source related to this category. Source information may change after this page is published.

CFPB: Understanding debt reduction ↗

Frequently asked questions

How does the student loan calculator work?

Interest accumulates monthly during the chosen deferral period before a standard amortization repayment schedule begins.

What should I change to compare student loan calculator scenarios?

Start with student loan balance, annual interest rate (apr), years before repayment. Two years of interest accrual increases the amount you may eventually repay. Every output is based on your own inputs.