Start with your loan documents and servicer contact information
Your monthly payment depends on four things: the total amount you borrowed, the interest rate on each loan, how long you have to repay, and which repayment plan you chose. You can find all of this in your loan promissory note (the document you signed when you took out the loan) and in your current loan servicer's online account or most recent statement.
Your loan servicer is the company that collects your payments. It is not necessarily the bank or school that gave you the loan originally. Log into your account at your servicer's website or call the number on your loan statement to pull up your loan details. You need the principal balance (what you still owe), the interest rate, and the repayment plan name.
If you have federal loans, you can also find this information at studentaid.gov by logging into your Federal Student Aid account. If you have private loans, contact your lender directly—there is no central database for private student loans.
Key Takeaways
- Your monthly payment is determined by your loan balance, interest rate, repayment plan type, and remaining loan term—all visible in your servicer's account or loan statement.
- Federal loans offer multiple repayment plans with different monthly amounts, while private loans typically have one fixed payment schedule set at origination.
- You can calculate a rough payment yourself using the loan balance, rate, and term, or use your servicer's online calculator for an exact figure.
- Changing your repayment plan changes your monthly payment immediately, but may extend your payoff date and increase total interest paid.
- Income-driven repayment plans for federal loans base your payment on your annual income rather than your loan balance, and recalculate each year.
How the basic payment formula works
If you want to calculate your payment yourself, the formula is straightforward. Divide your interest rate by 12 (to get the monthly rate), multiply by your remaining loan balance, and divide by one minus the discount factor. The discount factor is (1 + monthly rate) raised to the negative power of the number of months remaining.
In plain terms: a $30,000 loan at 5% interest over 10 years (120 months) costs roughly $283 per month. A $30,000 loan at 5% interest over 20 years (240 months) costs roughly $159 per month. The longer the term, the lower the monthly payment—but you pay more interest overall because you are paying for twice as long.
Most people do not calculate this by hand. Your servicer's website has a payment calculator that does this instantly. Enter your loan balance, interest rate, and loan term, and it shows you the monthly payment. This is faster and more accurate than the formula.
Federal loans: understanding your repayment plan options
Federal student loans let you choose from several repayment plans, and each one produces a different monthly payment. The plan you are currently on is listed in your servicer's account.
Standard Repayment spreads your loan over 10 years with a fixed monthly payment. This is the default plan and usually results in the highest monthly payment but the lowest total interest paid.
Graduated Repayment also lasts 10 years but starts with a lower payment that increases every two years. Your total interest is similar to Standard, but your early payments are smaller.
Extended Repayment stretches your loan over 25 years with either a fixed or graduated payment. Monthly payments are lower than Standard, but you pay significantly more interest over the life of the loan.
Income-Driven Repayment plans (Revised Pay As You Earn, Pay As You Earn, Income-Based Repayment, and Income-Contingent Repayment) calculate your payment based on your annual income, family size, and state of residence—not your loan balance. These plans typically result in lower monthly payments for borrowers with lower incomes, but extend your repayment term to 20 or 25 years. Any remaining balance is forgiven at the end, though forgiven amounts may be taxable.
Private loans: fixed payments set at the start
Private student loans do not offer multiple repayment plans. When you took out the loan, your lender set a fixed monthly payment based on the amount borrowed, the interest rate, and a repayment term (usually 5, 10, 15, or 20 years). That payment does not change unless you refinance.
Your monthly payment is printed on your loan documents and in your servicer's account. If you want to know what it would be under a different term, you can refinance with a new lender—but refinancing means taking out a new loan, which involves a credit check and a new application.
Some private loans have variable interest rates that adjust periodically. If your rate changes, your monthly payment may change too. Check your loan documents to see whether your rate is fixed or variable.
What happens when you change your repayment plan
If you have federal loans, you can switch repayment plans at any time through your servicer's website or by calling them. Your new monthly payment takes effect with your next payment. Switching to a longer plan (like Extended) lowers your monthly payment but increases your total interest. Switching to a shorter plan (like Standard) raises your monthly payment but saves you money on interest.
Income-driven plans recalculate your payment once per year based on your current income. If your income changes significantly, you can request a recalculation outside the annual window by contacting your servicer and providing updated income documentation.
Private loans cannot be switched to a different plan. Your only option to change your payment is to refinance with a different lender, which means applying for a new loan and going through underwriting again.
How to find your exact payment if you are unsure
Log into your servicer's account online and look for "Loan Details," "Payment Information," or "Repayment Plan." Your current monthly payment should be listed there, along with your next payment date. If you cannot find it online, call your servicer using the number on your loan statement or billing notice.
If you have multiple loans with different servicers, you will need to check each account separately. Federal loans are sometimes split across multiple servicers, so do not assume all your federal loans are with one company.
If you are about to take out a new loan and want to estimate what your payment will be, use the Federal Student Aid loan calculator at studentaid.gov (for federal loans) or your lender's calculator (for private loans). These tools let you enter different loan amounts and terms to see how your payment changes.
When your payment changes without you switching plans
Your monthly payment can change even if you stay on the same plan. If you have an income-driven plan, your payment recalculates each year based on your updated income. If you have a variable-rate private loan, your payment changes when your interest rate adjusts. If you make extra payments toward principal, your remaining balance drops, which can shorten your payoff date (though your monthly payment amount stays the same unless you switch plans).
Interest accrual also matters. If you are in school or in a deferment or forbearance period, interest may be accumulating on your loans even though you are not making payments. When your repayment period begins, that accrued interest is added to your principal balance, which increases your monthly payment.
Frequently Asked Questions
Can I lower my monthly payment without extending my loan term?
Not with federal loans—lower payments always come with a longer repayment term. With private loans, you cannot change your payment at all without refinancing. The only way to lower your payment without extending your term is to pay down your principal faster, which requires extra payments beyond your monthly obligation.
What if I cannot afford my current monthly payment?
For federal loans, contact your servicer and ask about income-driven repayment plans, which can lower your payment to as little as $0 per month if your income is low enough. You can also request forbearance or deferment, which pause your payments temporarily (though interest may still accrue). For private loans, call your lender to discuss hardship options—some offer temporary payment reductions, but this is not may provide.
Does paying extra toward my loan change my monthly payment?
No. Your monthly payment stays the same. Extra payments go directly toward your principal balance, which shortens how long you will be paying and reduces the total interest you pay. Your servicer will apply extra payments automatically if you send more than your required amount.
How do I know if my interest rate is fixed or variable?
Check your promissory note or loan documents—they state whether your rate is fixed or variable. If you have federal loans, your rate is always fixed. If you have private loans, your documents will specify. You can also call your servicer and ask directly.
What if I have loans with multiple servicers?
Log into each servicer's account separately to see your payment for each loan. If you have federal loans, you can also see all of them in one place at studentaid.gov. Add up all your monthly payments to get your total student loan payment obligation.