Student Loan Calculator

Using the calculator is straightforward. You'll need three pieces of information before you start:

• Loan balance: The total amount you borrowed, or the current outstanding balance if you've already started repaying.
• Annual interest rate: Check your loan servicer's website or your original loan documents. Federal loans have fixed rates set by Congress; private loans vary by lender and credit profile.
• Repayment term: How many years (or months) you have to pay off the loan. Standard federal repayment is 10 years, but options range from 5 to 25 years or longer depending on the plan.

Enter those values, hit calculate, and the tool does the rest. If you want to see how a different interest rate or a shorter term changes things, just update the fields and recalculate. It takes about 30 seconds and can seriously change how you think about your repayment strategy.

Your monthly payment depends on three variables: how much you borrowed, the interest rate on that balance, and how long you have to pay it back. Change any one of those and your payment shifts.

Generally speaking, a higher loan balance or interest rate means a bigger monthly payment. A longer repayment term lowers the monthly amount but increases the total interest you pay over the life of the loan. It's a classic trade-off, and there's no universally right answer. It depends on your income, your other expenses, and how aggressively you want to pay down the debt.

Here's a quick example. Say you borrowed $30,000 at a 6.5% interest rate on a 10-year term. Your monthly payment would be around $340. Stretch that to 20 years and the monthly payment drops to about $224, but you'd pay roughly $23,800 in total interest instead of about $10,800. That's a significant difference over time.

If you want to understand the math behind the calculator, here's the standard formula used to calculate a fixed monthly loan payment:

M = P × [r(1 + r)^n] / [(1 + r)^n – 1]

• M = monthly payment
• P = principal loan balance
• r = monthly interest rate (annual rate divided by 12)
• n = total number of payments (years × 12)

So for a $30,000 loan at 6.5% annual interest over 10 years, you'd convert 6.5% to a monthly rate of 0.065 / 12 ≈ 0.005417, and n would be 120 payments. Plug those into the formula and you get approximately $340 per month.

This formula assumes a fixed interest rate and equal payments every month, which is how most standard repayment plans work. Income-driven plans use a different calculation since payments are tied to your earnings rather than your balance.

Federal student loans come with several repayment plans, and picking the right one can save you a lot of money or at least make your payments manageable while you get on your feet.

• Standard Repayment Plan: Fixed payments over 10 years. You pay the least in total interest this way, but the monthly payment is higher than on other plans.
• Graduated Repayment Plan: Payments start low and increase every two years. Good if you expect your income to grow but want lower payments now.
• Extended Repayment Plan: Stretches payments out up to 25 years. Lower monthly payments, but significantly more interest paid overall.
• Income-Driven Repayment (IDR) Plans: These include SAVE, PAYE, IBR, and ICR. Monthly payments are capped as a percentage of your discretionary income. Any remaining balance may be forgiven after 20 to 25 years, depending on the plan.
• Public Service Loan Forgiveness (PSLF): If you work for a qualifying government or nonprofit employer and make 120 qualifying payments under an IDR plan, the remaining balance is forgiven.

Private loans don't offer these federal options. Some private lenders allow you to request forbearance or refinance to a different rate, but the flexibility is much more limited. Always exhaust your federal options before refinancing federal loans into private ones, since you'd lose access to income-driven plans and forgiveness programs.

Not all student loans are the same, and the type you have matters a lot when it comes to repayment flexibility, interest rates, and long-term costs.

Federal loans are almost always the better starting point because of the built-in protections. Private loans can make sense if you've maxed out federal aid and still need funding, or if you have excellent credit and can lock in a lower rate through refinancing. Just know what you're giving up before you make that move.

An amortization schedule breaks down every single payment you'll make over the life of the loan. Each row shows how much of that payment goes toward interest and how much chips away at the principal balance.

Early in the repayment period, a bigger chunk of each payment goes to interest because the outstanding balance is high. As the principal drops, the interest portion shrinks and more of your payment actually reduces what you owe. This is how amortization works for any fixed-rate loan, not just student loans.

Why does this matter? Because it shows you exactly when and how your debt decreases. If you're considering making extra payments, the amortization schedule reveals the impact clearly. Even one extra payment per year can noticeably shift the schedule and reduce the total interest you'll pay. Most loan calculators can generate a full amortization table once you've entered your loan details.

Paying a little extra each month is one of the simplest ways to cut the total cost of your loan. When you pay more than the minimum, the extra amount goes directly toward the principal balance. A lower principal means less interest accrues the following month, and that compounds in your favor over time.

Let's say you have a $30,000 loan at 6.5% on a 10-year term. Your standard payment is about $340 a month. If you add just $100 extra each month, you'd pay off the loan more than two years early and save over $2,000 in interest. Put in $200 extra and the savings grow even more.

A few things to keep in mind when making extra payments:

• Tell your loan servicer to apply the extra amount to the principal, not toward future payments. Some servicers will automatically apply it as a payment advance, which doesn't reduce your principal the same way.
• If you have multiple loans, consider targeting the highest-interest loan first (avalanche method) to minimize total interest paid.
• Even occasional lump-sum payments, like a tax refund, can make a meaningful dent.

There's no prepayment penalty on federal student loans, and most private lenders don't charge one either. So there's really nothing stopping you from paying ahead when you have the means to do it.

The total amount you end up paying back isn't just about the original loan balance. Several factors shape the real cost over time, and understanding them helps you make smarter borrowing and repayment decisions.

• Interest rate: Even a half-percent difference adds up significantly over a 10 or 20-year term. Federal loan rates are fixed at the time of disbursement; private rates depend on your creditworthiness and market conditions.
• Loan term: Longer terms lower monthly payments but increase total interest. Shorter terms cost more per month but less overall.
• Capitalized interest: If interest accrues during a deferment or grace period and isn't paid off, it gets added to your principal. That means you're paying interest on interest going forward.
• Repayment plan: Income-driven plans may lower your monthly payment but extend the repayment timeline, increasing total interest unless forgiveness kicks in.
• Loan type: Subsidized federal loans don't accrue interest while you're in school at least half-time. Unsubsidized loans and private loans start accruing interest right away.
• Origination fees: Federal Direct loans carry an origination fee of around 1 percent, which is deducted from the disbursed amount. It's a small but real cost to factor in.

When you're borrowing, keeping the loan amount as low as possible matters more than almost anything else. Every dollar you don't borrow is a dollar you don't have to repay with interest. And once you're in repayment, paying attention to these factors gives you real leverage to reduce what you ultimately spend.