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Student Loan Calculator

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Enter your loan balance, interest rate, and repayment term to estimate your monthly student loan payment and total interest. This student loan calculator works for both federal and private student loans, so you can compare repayment plans, see how extra payments save money, and plan your payoff timeline in one place.

Student Loan Repayment Calculator

Use the calculator above to estimate your monthly student loan payments and total repayment cost. Plug in the amount you borrowed (or still owe), your interest rate, and your loan term. The calculator returns your estimated monthly payment, total interest paid, and total amount repaid over the life of the loan.

This student loan repayment calculator handles the core math for any loan type. Federal loans, private loans, subsidized, unsubsidized, or Parent PLUS loans all follow the same amortization formula. The difference is in the rate, term, and repayment plan you choose.

You can also model extra payments to see how paying more each month shortens your timeline and reduces total interest. Adjust the inputs as many times as you need. Nothing is saved or submitted.

How to Use This Calculator

Follow these steps to estimate your monthly student loan payment:

  1. Enter your loan amount. This is either the total you plan to borrow or your current remaining balance.
  2. Enter your interest rate. Use the rate from your loan disclosure or promissory note. If you have not received a rate yet, try the current federal rate or an estimate from your lender.
  3. Choose your repayment term. The standard federal term is 10 years (120 months). Private loans vary. You can test different terms to compare.
  4. Add an extra monthly payment (optional). If you want to see payoff savings, enter the additional amount you could pay each month beyond the minimum.
  5. Review your results. The calculator shows your estimated monthly payment, total interest, and total amount paid.

If you have multiple student loans, run the calculator once for each loan. Add the monthly payments together for your combined obligation.

What is my student loan account number? You can find it on your loan servicer's website, your monthly billing statement, or your original promissory note. You do not need it for this calculator.

Student Loan Payment and Interest Rate

Your monthly student loan payment depends on three things: the loan amount, the interest rate, and the repayment term. Change any one of these and the payment changes.

Here is how the math works. The calculator uses standard amortization. Each monthly payment covers that month's interest first, then the remainder reduces your principal balance. Early in repayment, most of your payment goes toward interest. Over time, a larger share goes toward principal.

How does the interest rate affect the total cost of borrowing? Significantly. A small rate difference compounds over years. For example, borrowing $35,000 at 5.5% over 10 years costs about $10,300 in total interest. The same loan at 7.0% costs roughly $13,400 in total interest. That 1.5 percentage point difference adds over $3,000 to the cost of the loan.

Monthly interest is calculated by dividing your annual rate by 12 and multiplying by your remaining balance. As your balance drops, less interest accrues each month.

Student Loan Interest Rate: Fixed vs. Variable

Student loans come with either fixed or variable interest rates. The distinction matters for budgeting and long-term cost.

  • Fixed rates stay the same for the entire life of the loan. Your monthly payment never changes. All federal student loans have fixed rates set by Congress each year.
  • Variable rates can rise or fall over time based on a benchmark index. Private student loan lenders commonly offer variable rate options. They may start lower than fixed rates but carry the risk of increasing.

What is a good student loan interest rate? For federal undergraduate loans, rates are set annually. For the 2024-2025 academic year, the rate is 6.53%. Private loans vary widely based on your credit score, cosigner, and lender. Rates under 5% are generally considered competitive for private borrowers with strong credit.

What is the difference between APR and interest rate? The interest rate is the cost of borrowing the principal. APR (Annual Percentage Rate) includes the interest rate plus fees, like an origination fee. Federal Direct Loans carry an origination fee that effectively raises the cost above the stated rate. When comparing loans, APR gives you a more complete picture of total cost.

For this calculator, enter your interest rate (not APR). The tool estimates payments based on the rate applied to your balance.

Repayment Term and Monthly Payment

The repayment term is the number of years you have to pay off your loan. Shorter terms mean higher monthly payments but less total interest. Longer repayment terms mean lower monthly payments but more interest paid overall.

Here is a comparison for a $30,000 loan at 6.0%:

  • 10-year term: ~$333/month, ~$9,967 total interest
  • 15-year term: ~$253/month, ~$15,567 total interest
  • 20-year term: ~$215/month, ~$21,583 total interest
  • 25-year term: ~$193/month, ~$27,944 total interest

The 25-year option cuts the monthly payment by about $140 compared to 10 years. But it nearly triples the total interest paid.

How can I lower my monthly student loan payments without extending the repayment term? A few options exist. Refinancing to a lower interest rate reduces the payment without stretching the timeline. Some borrowers also qualify for interest rate reductions through autopay discounts (typically 0.25%). On federal loans, switching to an income-driven repayment plan lowers payments but usually extends the term.

Use the calculator to test different terms side by side. Find the monthly payment you can handle while minimizing total interest.

Federal Student Loan Repayment Plan Options

Federal student loans offer several repayment plan options. Your servicer can change your plan at any time, but each plan has different payment amounts, timelines, and total costs.

Income-Driven Repayment

Income-driven repayment (IDR) plans set your monthly payment based on your income and family size rather than your loan balance. These plans are designed for borrowers whose standard payments would be a financial hardship.

Common IDR plans include:

  • SAVE (Saving on a Valuable Education): Payments are based on 5-10% of discretionary income. Unpaid interest does not capitalize. Remaining balance is forgiven after 20 or 25 years.
  • PAYE (Pay As You Earn): Payments are 10% of discretionary income. Forgiveness after 20 years.
  • IBR (Income-Based Repayment): Payments are 10-15% of discretionary income depending on when you borrowed. Forgiveness after 20 or 25 years.
  • ICR (Income-Contingent Repayment): Payments are 20% of discretionary income or the amount you would pay on a 12-year fixed plan, whichever is less. Forgiveness after 25 years.

Are you pursuing Public Service Loan Forgiveness (PSLF)? If you work for a qualifying nonprofit or government employer, PSLF forgives your remaining federal loan balance after 120 qualifying payments on an IDR plan. This can dramatically reduce total repayment cost. You must be on an eligible repayment plan and make payments while employed full-time by a qualifying employer.

IDR plans result in lower monthly payments but more total interest if you do not receive forgiveness. This calculator estimates standard amortization. For IDR payment estimates, the federal student aid site offers a dedicated tool.

Standard Loan Repayment

The standard repayment plan is the default for federal student loans. It sets equal monthly payments over 10 years (120 months).

This plan has the lowest total interest cost among all federal options because the term is the shortest. If you can afford the monthly payment, standard repayment is the most cost-effective choice.

For Direct Consolidation Loans, the standard repayment term can extend up to 30 years depending on total loan balance. This reduces the monthly payment but increases total interest.

What options are available if I can't afford my current monthly payments? You can switch to an IDR plan, request deferment or forbearance (interest may still accrue), or explore graduated repayment. Graduated repayment starts with lower payments that increase every two years over a 10-year term. It costs more in total interest than standard repayment but eases the burden early on.

Private Student Loan Repayment

Private student loans come from banks, credit unions, and online lenders. They do not offer the same repayment flexibility as federal loans.

Key differences between private and federal student loan repayment:

  • No income-driven plans. Private lenders set terms at origination. Your payment is based on the loan amount, rate, and term you agreed to.
  • No federal forgiveness programs. PSLF and IDR forgiveness do not apply to private loans.
  • Variable or fixed rates. Private student loan lenders offer both. Variable rates may start lower but can increase.
  • Terms vary. Private loan terms typically range from 5 to 20 years. Some lenders offer up to 25 years.
  • Credit-based pricing. Your interest rate depends on your credit score (and cosigner, if applicable). Borrowers with strong credit get the lowest interest rates.

Can I negotiate loan terms or interest rates with lenders? Generally, no. Private student loan lenders set rates based on creditworthiness and market conditions. However, you can shop multiple lenders to compare offers. Some lenders also offer rate discounts for autopay enrollment.

Do you have private student loans or unsubsidized loans? Interest on both begins accruing immediately upon disbursement. On unsubsidized federal loans, the government does not cover interest while you are in school. Unpaid interest capitalizes (gets added to your principal) when repayment begins, increasing the total amount you owe.

This calculator works for private loans. Enter the loan amount, interest rate, and term from your loan agreement.

Student Loan Payoff: Extra Payment Savings

Paying more than the minimum each month is one of the most effective ways to pay off your student loans faster and save on interest.

When you make extra payments, the additional amount goes directly toward reducing your principal balance. A smaller balance means less interest accrues the following month. The effect compounds over time.

Example: On a $35,000 loan at 6.5% with a 10-year term, the standard monthly payment is about $397. Adding just $100 per month:

  • Pays off the loan roughly 2.5 years early
  • Saves approximately $3,200 in total interest

Use the calculator to enter different extra payment amounts and see the savings. Even $25 or $50 per month makes a measurable difference over the life of the loan.

Tips for making extra payments work:

  • Tell your servicer to apply extra payments to principal, not future payments.
  • There is no prepayment penalty on federal student loans. Most private lenders also have no prepayment penalty, but check your loan agreement.
  • Target the loan with the highest interest rate first if you have multiple loans.

How much money can I borrow in federal student loans? Dependent undergraduates can borrow up to $31,000 total in Direct Loans. Independent undergraduates can borrow up to $57,500. Graduate students can borrow up to $138,500 (including undergraduate loans). Knowing these limits helps you plan whether extra payments or faster payoff is realistic for your situation.

Refinancing Your Student Loan for Savings

Refinancing replaces one or more existing student loans with a new loan, ideally at a lower interest rate. This can reduce your monthly payment, total interest, or both.

When refinancing makes sense:

  • Your credit score has improved since you originally borrowed.
  • Market rates are lower than your current rate.
  • You want to combine multiple loans into a single payment.
  • You can qualify for a shorter term without stretching your budget.

When refinancing may not make sense:

  • You have federal loans and rely on IDR plans, PSLF, or deferment options. Refinancing federal loans into a private loan permanently removes access to federal protections and forgiveness programs.
  • You are close to loan forgiveness eligibility.
  • You cannot qualify for a lower rate than you currently have.

To estimate refinancing savings, run the calculator twice. First, enter your current loan details. Then enter the new rate and term you have been offered. Compare the total interest and monthly payment.

Can a student loan payment calculator estimate both federal and private student loan payments? Yes. This calculator uses the same amortization formula regardless of loan type. The math is the same. The difference is in the rate, term, and repayment features your lender offers.

Financial Aid and Student Loan Debt

Understanding financial aid before you borrow can reduce the amount of student loan debt you take on.

Financial aid includes grants, scholarships, work-study, and loans. Grants and scholarships do not need to be repaid. Loans do. Maximizing free aid before borrowing is the most effective way to limit education costs.

Planning to borrow more? Consider these steps:

  • Complete the FAFSA every year. Federal student aid eligibility can change based on income and family size.
  • Compare federal and private loans. Federal loans generally offer lower fixed rates, more flexible repayment, and access to forgiveness programs.
  • Borrow only what you need for tuition, fees, and essential living costs.
  • Estimate your post-graduation salary. A common guideline is to keep total student loan debt below your expected first-year income.

Use this calculator to project payments before you borrow. Entering different loan amounts helps you see how each additional dollar borrowed affects your monthly obligation after graduation.

Does the grace period affect my total cost? Most federal loans include a six-month grace period after you leave school. You are not required to make payments during this time, but interest still accrues on unsubsidized loans. That unpaid interest capitalizes when repayment begins. Paying interest during the grace period, even small amounts, can reduce your total cost.

Student Loan Calculator Estimates and Limitations

This student loan calculator provides estimates based on the inputs you enter. Results are meant for planning purposes and are not a guarantee of actual payment amounts.

What this calculator does:

  • Estimates monthly payments using standard amortization
  • Calculates total interest over the repayment term
  • Shows the impact of extra payments on payoff time and savings
  • Works for federal and private student loans

What this calculator does not do:

  • Model income-driven repayment plans (these require income and family size data)
  • Account for deferment, forbearance, or variable rate changes over time
  • Include origination fees in the payment calculation
  • Factor in individual circumstances like tax deductions on student loan interest

Actual repayment amounts depend on your loan servicer, repayment plan, and any changes to your rate or term. For federal loans, visit the Federal Student Aid website for plan-specific estimates. For private loans, contact your student loan lender directly.

This calculator helps you compare scenarios and build a repayment strategy. It is not financial advice. Consult a financial advisor for decisions about consolidation, refinancing, or forgiveness programs based on your specific situation.