How Do Student Loans Work? A Complete Guide for Borrowers

The cost of college goes up every year, putting post-secondary education out of reach for more and more Americans. If you’ve looked up how much it costs to go to your dream school and can’t fathom how you could ever possibly pay for it, don’t rule it out. First and foremost, you may qualify for grants, scholarships, and work-study programs that help lower the cost. Student loans can help pay the remainder of what you’d owe.

Of course, student loans can be expensive. You have to repay what you borrow, and they earn interest over time. That’s why it’s crucial to understand how student loans work, particularly interest and repayment, before borrowing any money. Our student loan guide below includes everything you need to know.

Key takeaways

• You can get student loans from the federal government and private lenders to help cover the cost of college.
• Student loan funds are distributed directly to your school; you may also receive additional funds to help cover expenses like books, supplies, and housing costs.
• In most cases, interest starts accruing as soon as your student loan funds are disbursed, which means you’ll owe more than what you borrowed by the time you graduate.
• Student loan repayment typically begins after a brief grace period post-graduation; federal and private loans offer multiple repayment options.

What are student loans?

Student loans are a form of financial aid in which you borrow money to pay for school, and then pay back what you borrowed, plus interest, usually after graduation. You can use student loans to pay for the cost of tuition, as well as school fees, housing, books and supplies, and food and transportation costs. You can get both federal loans and private loans to help pay for college; federal loans typically have more affordable rates, flexible repayment options, and borrower protections.

You might need to take out student loans if you’ve exhausted other free sources of funding, such as scholarships, grants, and your personal savings. It’s important to first understand how student loans work, what’s needed to qualify, and your options when borrowing for school.

How student loans work

More than 4 in 10 Americans who attend college rely on student loans, but there’s still plenty of confusion about how they work, from FAFSA applications to interest accrual to repayment plans. Let’s break down the complex student loan process into more manageable, bite-sized steps.

Application

The most important step to applying for student loans is to fill out the Free Application for Student Aid (FAFSA) before each school year. Based on your application and financial needs, you’ll be offered financial aid packages for the schools you apply to, which may contain:

• Scholarships
• Grants
• Work-study programs
• Federal student loans

If that aid is not enough to cover the full cost of college, you can then research private student loan providers for additional funding. Follow their steps online to apply. Often, students may need a cosigner (like a parent or guardian) to get approved for a private student loan.

Disbursement

The money from student loans is typically available at the start of each semester through a process called disbursement. But you, as the student, don’t receive all the money. Typically, student loans are dispersed directly to the school to cover tuition, fees, and, if applicable, living expenses such as housing (dorm) and food (meal plans).

Any leftover money will be disbursed to you, the student, to cover your own education expenses, such as books and equipment, rent for an apartment near campus, and transportation.

Interest

Student loans begin accruing interest as soon as the funds are disbursed to you and/or the school. That means, while payments are typically deferred while you’re in school at least half-time, interest grows on your loans the whole time. When repayment begins, the interest that has accrued gets added to your loan balance, and future interest will now accrue on that new, higher loan amount. This is called interest capitalization.

Federal student loan interest accrues daily using a simple interest formula, meaning interest is only calculated based on your principal balance (what remains of how much you borrowed). Many private lenders also use a simple interest formula, but some may use compound interest, meaning interest is calculated based on your loan balance and any unpaid interest that has accrued.

Repayment

In most cases, student loan repayments begin after leaving school. While you’re in school (usually at least half-time), both the federal government and private lenders let you defer payments until you graduate (and after a grace period).

During school, the federal government pays off all interest that accrues on Direct Subsidized Loans. However, for all other federal and private loans, interest accrues during school, whether you’re making payments or not.

Grace period

Federal student loans include a grace period, which is a set amount of time after you graduate before repayment kicks in. Grace periods are typically six months for federal loans, but this can vary depending on the type of loan.

Private loans also typically offer grace periods. Some lenders, such as Earnest, stand out for having longer grace periods.

The idea behind a grace period is that it gives you time post-graduation to find your first job before having to worry about your monthly debt obligations.

When are student loans needed?

You need student loans when scholarships, grants, and other forms of financial aid are not enough to cover the cost of education, and you don’t have enough money in savings to make up the difference.

You may use student loans to pay for public or private two- and four-year colleges or universities, technical schools, vocational schools, graduate and postgraduate programs, or study abroad. 

Example scenarios of when student loans might be necessary include the following:

• You get grant and scholarship funding that covers your tuition and fees but not room and board or books.
• Your parents set aside money in a college savings account for you, but it’s not enough to cover your anticipated financial need. 
• You’re planning a permanent move to a new state for college, but you must pay the higher out-of-state tuition rate during your first year of enrollment. 
• You decide to go back to school to earn a professional degree, and your employer offers student loan reimbursement instead of tuition assistance. 
• You want to spend a couple of semesters studying abroad, and the program you plan to enroll in comes with a higher cost of attendance. 

You’ll have to pay back what you borrow with interest. But these examples illustrate how student loans can be useful in many situations.

Am I eligible for a student loan?

Your eligibility for a student loan primarily depends on your financial need, but other student loan policies can affect eligibility for federal and private loans as well. 

Student loan eligibility factors include:

• Citizenship
• Your school 
• Enrollment status
• Academic progress
• Financial need

You may need to show proof of enrollment in an eligible degree or certificate program to qualify for loans. If you’re applying for need-based federal aid, you’ll also need to provide information about your income and assets, or your family’s income and assets if you’re a dependent student, when filling out the FAFSA.  

Credit scores are also a factor when applying for most private loans. If you have a limited credit history, you may need a cosigner.

What types of student loans are available?

The two core types of student loans available are federal and private loans: 

• Federal student loans, offered through the Department of Education, have standardized interest rates and repayment terms. 
• Private student loans are an alternative to federal loans offered by private lenders.

What’s the difference between federal and private loans?

The main difference between federal and private student loans is that federal loans are issued by the government and offer standardized rates and borrower protections, while private loans come from lenders like banks, typically depend on your credit, and have fewer repayment benefits. 

Comparing the features of each one can make it easier to decide which to use if you need student loans to pay for school.

Common types of federal student loans

Several types of federal student loans may be available to you via your financial aid package:

• Stafford (or Direct) Loan: Stafford Loan is the broader term for both Direct Subsidized and Unsubsidized student loans, detailed below.
• Direct Subsidized Loans: Direct Subsidized Loans are available to undergraduate borrowers; the federal government pays all interest that accrues while you’re in school. These loans have the lowest fixed interest rate of any federal loans.
• Direct Unsubsidized Loans: Direct Unsubsidized Loans are available to both undergraduate and graduate borrowers, but you are responsible for paying back any interest that accrues while in school. Rates are the same as Subsidized Loans for undergrads but higher for graduate borrowers.
• Parent PLUS Loan: A Parent PLUS loan is a student loan that a parent or guardian takes out to cover the cost of their child’s education.
• Grad PLUS Loan: Grad PLUS loans were limited to graduate students, but they will no longer be available starting July 1, 2026.

Whenever possible, take out Direct Subsidized Loans before any other, because the government covers interest costs while in school. Explore full student loan eligibility requirements to understand which federal loans you may qualify for.

How much can you borrow in student loans?

Federal loans have clear borrowing limits per school year, as well as lifetime borrowing caps. Federal student loan limits vary depending on the type of federal loan you take out. 

When piecing together how to pay for school, it’s important to understand how much FAFSA gives, including through grants, scholarships, and work-study programs, as well as federal loans. In many cases, you may need to turn to private loans to fill any funding gaps.

While there’s no limit to how many student loans you can take out each year, focus on using all the federal aid you can first, then choose the lowest-rate private loan or loans needed to cover any remaining costs. Check out our guide on how to get a student loan to learn more.

How to apply for a student loan

If you hope to qualify for federal student aid, completing the FAFSA is the most basic student loan requirement. 

You can submit it online through the Department of Education website. The process can take a couple of hours. It’s helpful to get all of the necessary documentation, which we’ll detail below, organized before you begin. 

To get student loans from private lenders, you must apply with the lender. This often requires submitting your application online and uploading supporting documentation.

Lenders may allow you to get preapproved without hurting your credit (aka a soft credit check), allowing you to compare rates and loan quotes from several companies.

What do you need to apply for a student loan?

What you need to apply for a student loan depends on the type of loan you’re seeking. You can expect to share information about your income, debt, and plans for attending school. 

The documents you may need include bank statements, pay stubs, or tax forms. 

A credit check may be required for PLUS loans or private loans. In either case, the lender is responsible for completing the credit check (aka a hard credit check). You only have to agree to the credit check; you don’t have to furnish any credit information.

Federal student loans

Applying for federal student loans includes three main steps:

1. Fill out the FAFSA: Fill out the FAFSA form online to determine the amount of aid you’re eligible for.
2. Review financial aid packages: When you’re accepted into a school, you’ll receive a financial aid package based on the information in your FAFSA application. The package will likely include a mixture of grants, scholarships, work-study offers, and federal loans.
3. Agree to the loan terms: Follow the instructions to sign for any loans you want to take out. The loan funds will be disbursed to your school at the start of each semester; if relevant, additional funds may be disbursed to you for educational expenses like books and supplies.

Private student loans

To apply for private student loans, you must complete the application process with the lender of your choosing. The specific process can vary from one lender to the next. Most require proof of income and good credit to qualify. If you have poor or no credit history, you may need to add a cosigner (often a parent or guardian) to your loan application.

Once you submit the application, the lender will review it and approve or deny you for loans.

How often do I need to apply for student loans?

Most borrowers must apply for student loans at the beginning of each academic year, which includes filling out the FAFSA to remain eligible for federal student aid. Many private lenders require you to reapply for each year you need loan funding, though some, such as Citizens Bank, let you apply once for all four years of an undergrad degree.

What happens if you’re denied a student loan?

You might be denied a student loan from the federal government if you can’t demonstrate financial need or don’t meet citizenship requirements. If that’s the case, you may need to turn to private student loans.

Private lenders may also deny you if you don’t have a strong enough credit score or sufficient income to qualify. In that instance, you may be able to qualify if you reapply with a cosigner.

How does a student loan work with a cosigner?

Adding a cosigner with strong credit to a private student loan application could make it easier to get approved and may qualify you for lower rates. A cosigner takes responsibility for your debt if you can’t make payments, which can cause both of your credit scores to drop. The lender could also sue both of you to recoup the amount owed.

Some private loans offer cosigner release after a set number of on-time payments. Sallie Mae, for instance, may approve cosigner release after just 12 on-time payments.

What can I use student loans for?

Student loans are meant to pay for necessary costs to obtain a college education. 

You can use your student loans to pay for the following:

• Tuition and fees
• Room and board
• Books, supplies, and other equipment
• Study abroad
• Transportation to and from school
• Child care expenses so you can attend school
• Miscellaneous fees or out-of-pocket costs you pay for school
• Costs related to a disability, such as specialized equipment or transportation fees

Student loans shouldn’t be used for anything nonessential. This includes traveling with friends, dinner out, new clothes, or a big-screen TV. 

The Office of Federal Aid mandates students use federal loans only for approved expenses, while private lenders may have their own list of what you can and can’t spend the money on.

How does student loan repayment work?

Student loan repayment typically begins after graduation and includes monthly payments until you’ve paid back what you borrowed, plus interest. There’s usually a student loan repayment grace period (often six months) after graduation before repayment kicks in.

Federal student loan repayment

Here’s what to know about repaying federal student loans:

• No payments while in school: Aside from Parent PLUS loans, you don’t have to worry about paying student loans while in school.
• Standard repayment: Under the One Big Beautiful Bill Act (OBBBA), a standard repayment plan for federal student loans ranges from 10 to 25 years.
• Legacy income-driven repayment plans: Legacy income-driven repayment plans, including Income-Contingent Repayment (ICR), Pay As You Earn (PAYE), and Saving on a Valuable Education (SAVE), have been eliminated or will soon be phased out as part of the OBBBA.
• New income-driven repayment plan: Instead, if you take out a loan on or after July 1, 2026, you can choose the Repayment Assistance Plan (RAP), where payments are set at 1% to 10% of your adjusted gross income (or $10 a month if your income is below $10,000 a year). If you still have a balance after 30 years (with 360 qualifying payments), the loans can be forgiven.

Private student loan repayment

Each lender has its own repayment plans, including deferred payment until after graduation, as well as payments that start in school (e.g., principal and interest, interest-only, or a flat, low monthly payment). The best private student loans typically have repayment terms between five and 15 years.

How student loan interest works

Student loan interest is the cost of borrowing money to pay for school. Here’s what you need to know about student loan interest rates:

• How student loan interest accrues: In most cases, interest starts to accumulate while you’re in school. You’re responsible for paying that interest, plus the amount you borrowed, after graduation. Use a student loan interest calculator to see how various rates influence the cost of the loan.
• Fixed vs. variable rates: All federal student loans have fixed interest rates, which means interest accrues at the same rate over the life of the loan. Many private loans are also fixed-rate, but some may have variable rates, meaning the interest rate can go up or down over time, depending on the economy.
• Federal vs. private rates: Federal student loans have a set interest rate each year, depending on the type of federal loan. (See the table below.) Private student loan rates depend on the lender, your credit score (and the score of a cosigner), your income, and the repayment term.

The total amount of interest paid on a student loan depends on the total loan balance, the interest rate, and the repayment timeline. To learn more, explore our deep dive into how student loan interest works.

How do college loans work? Key takeaways

Student loans are an important resource for students who need help covering the cost of college, but they can be confusing to navigate, especially if it’s your first year attending university. Here are the student loan takeaways to remember:

• You can apply for federal loans by filling out the FAFSA and for supplemental loans with private lenders when federal financial aid does not cover the full cost.
• Interest starts to accumulate as soon as funds are disbursed to your school, and you’re responsible for repaying interest as well as the original money you borrowed.
• You usually don’t start repaying student loans until after your post-graduation grace period, though it may be worth making interest-only payments during school.

As evidenced by the Big Beautiful Bill of 2025, the rules and guidelines for student loans continue to change. Track these and other changes through the years with our guide to the history of student loans.

FAQ: How do student loans work?

Do student loans cover all college costs?

Federal student loans may not be enough to cover the full cost of college, but you can get additional private student loans to help bridge the gap and cover the full cost of your education.

Do you need to pay student loans while in school?

Most federal student loans don’t require payments while in school, but because interest charges start to pile up while you complete your education (on all loans except Direct Subsidized Loans), it may be worth making payments if you can.

Private student loans typically offer multiple repayment options during school, including principal and interest payments, interest-only payments, and flat monthly loan payments; they may also let you defer payment until after graduation.

What happens if you don’t repay student loans?

If you don’t repay federal student loans, your wages can be garnished, and your tax return can be used to pay back the lender. Defaulting on student loans may also make you ineligible for future student loans and can hurt your credit score significantly. Private lenders can sell your account to collections agencies, which can take legal action against you.

Can you pay off student loans early?

Yes, you can pay off student loans early, and doing so can save you significant money on interest. Reach out to your loan servicer or lender to learn more about early loan payoff.

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