How student loans work: the basic flow

A student loan is money you borrow from a lender — either the federal government or a private bank — to pay for college or graduate school. You receive the funds, use them to cover tuition and living expenses, and then repay the money over time with interest. The lender expects you to start repaying after you graduate or drop below half-time enrollment, though the exact timeline depends on the loan type.

Federal loans and private loans work differently. Federal loans come from the U.S. Department of Education, have fixed interest rates set by Congress, and offer repayment plans tied to your income. Private loans come from banks or credit unions, have variable or fixed rates that depend on your credit score, and typically require repayment to begin sooner. Most students use federal loans first because the terms are more flexible and don't require a co-signer.

Key Takeaways

  • Federal student loans are disbursed directly to your school, which applies them to tuition and fees, then sends any leftover money to you.
  • You do not begin repaying federal loans until after you graduate or drop below half-time enrollment, with a grace period that typically lasts six months.
  • Interest accrues (builds up) on unsubsidized loans while you are in school, but the government pays the interest on subsidized loans during that time.
  • Private loans often require repayment to begin while you are still in school, and your interest rate depends on your credit score and whether you have a co-signer.
  • The amount you can borrow each year is capped by federal law, and the total you can borrow for an undergraduate degree is limited.

Federal loans: how the money reaches you

When you take out a federal student loan, the Department of Education does not send the money to you directly. Instead, it sends the funds to your school's financial aid office. Your school applies the money to your bill first — tuition, fees, room and board, and other charges listed on your account. If money remains after your bill is paid, the school sends you the difference, usually as a check or direct deposit.

This process happens once per term, typically at the start of each semester. You must complete the Free Application for Federal Student Aid (FAFSA) each year to be considered for federal loans. The FAFSA determines how much federal aid you may receive based on your family's income, assets, and other factors. Your school's financial aid office then packages that aid — combining loans, grants, and work-study if you may have access to — and sends you an award letter showing what you have been offered.

You have the right to accept or reject any loan offered to you. If you accept, you sign a Master Promissory Note (MPN), a legal document stating you will repay the loan. You only sign the MPN once per loan type; it remains valid for future years unless you cancel it.

Interest and how it grows while you are in school

Interest is the cost of borrowing money, expressed as a percentage of the loan balance. Federal student loans have interest rates set by Congress and are the same for all borrowers in a given year. For the 2024–2025 school year, undergraduate federal loans carry a fixed rate; the exact percentage changes each year and is published by the Department of Education.

How interest behaves while you are in school depends on the loan type. Subsidized loans do not accrue interest while you are enrolled at least half-time. The government pays the interest for you during school and the grace period after graduation. Unsubsidized loans accrue interest from the moment the money is disbursed. That interest is not paid by the government, so it builds up. When you graduate, you can choose to pay the accrued interest or let it capitalize — meaning it gets added to your loan balance and you then owe interest on the interest.

Private loans almost always accrue interest while you are in school. Some lenders allow you to make interest-only payments during school to keep the balance from growing, but many require full monthly payments to begin immediately or shortly after disbursement.

When repayment begins and grace periods

Federal student loans enter repayment after you graduate, leave school, or drop below half-time enrollment. Before repayment starts, you receive a grace period — a set amount of time during which you do not have to make payments. For most federal loans, the grace period is six months. During this time, interest continues to accrue on unsubsidized loans.

Private loans have shorter or no grace periods. Some private lenders require repayment to begin while you are still in school; others offer a grace period of three to six months. Check your loan documents to know when your first payment is due.

Before your first payment is due, you must choose a repayment plan (for federal loans) or contact your lender to confirm the payment amount and due date. Federal loans offer several repayment plans: Standard Repayment (fixed payments over 10 years), Income-Driven Repayment (payments based on your income), and others. Your choice affects how much you pay each month and how long you carry the debt.

Loan limits: how much you can borrow

The federal government sets annual borrowing limits for each type of loan and for each year of study. For undergraduate students, the limit for federal loans is lower than for graduate students. The total amount you can borrow for an undergraduate degree is capped as well — currently $31,000 for dependent students and $57,500 for independent students, though these figures can change.

These limits exist to prevent students from borrowing more than they can reasonably repay. If you need more money than federal loans provide, you can borrow from private lenders, but private loans do not have the same protections or flexible repayment options as federal loans.

Your school's financial aid office can tell you how much you have already borrowed and how much you are still able to borrow in a given year. This information also appears on your loan statements and on the Federal Student Aid website.

What happens if you do not repay

If you miss a federal loan payment, your loan enters delinquency. After 90 days of missed payments, the lender must report the delinquency to credit bureaus, which damages your credit score. After 270 days (about nine months) of non-payment, your loan goes into default. Once in default, the entire remaining balance becomes due immediately, and the government can take action to recover the money — including wage garnishment, tax refund seizure, and Social Security benefit offsets.

Defaulting on a federal loan also makes you ineligible for future federal aid and can affect your ability to get a job (some employers check credit reports) or rent an apartment. If you are struggling to pay, contact your loan servicer before you miss a payment. Federal loans offer income-driven repayment plans that can lower your monthly payment to as little as $0 if your income is low enough.

Private loans have no income-driven repayment options and no grace periods for hardship. If you default on a private loan, the lender can sue you and obtain a judgment against you, leading to wage garnishment and bank account levies.

Paying off loans early and refinancing

You can pay off a federal student loan at any time without penalty. Any extra payment you make goes directly toward the principal (the amount you originally borrowed), reducing the total interest you will owe. If you have both subsidized and unsubsidized loans, paying extra on the unsubsidized loans first saves you more money because unsubsidized interest accrues faster.

Refinancing means taking out a new loan to pay off an existing loan, usually at a lower interest rate. Federal loans can be refinanced through a private lender, but once you refinance a federal loan into a private loan, you lose access to federal protections like income-driven repayment and loan forgiveness programs. Refinancing makes sense only if you have a strong credit score, stable income, and do not need the flexibility that federal loans provide.

Frequently Asked Questions

Do I have to start repaying my student loans right after I graduate?

No. Federal loans have a grace period, usually six months, before repayment begins. During this time you do not have to make payments, though interest still accrues on unsubsidized loans. Private loans have shorter or no grace periods, so check your loan documents to confirm when your first payment is due.

What is the difference between subsidized and unsubsidized federal loans?

With subsidized loans, the government pays your interest while you are in school and during the grace period. With unsubsidized loans, interest accrues from day one and you are responsible for it. Unsubsidized loans cost more over time because the interest compounds. Subsidized loans are typically offered to students with greater financial need.

Can I borrow as much as I want for college?

No. Federal loans have annual limits (the amount you can borrow in a single year) and aggregate limits (the total you can borrow for your entire degree). These limits vary by year of study and whether you are a dependent or independent student. If you need more than federal loans provide, you can borrow from private lenders, but private loans do not have the same protections.

What happens if I cannot afford my monthly payment?

If you have federal loans, you can change to an income-driven repayment plan, which bases your payment on your income rather than the loan balance. Your payment could be as low as $0 if your income is very low. Contact your loan servicer to explore options. Private loans do not offer income-based plans, so contact your lender to discuss hardship options.

Can I pay off my student loans early without a penalty?

Yes, for both federal and private loans. There is no penalty for paying off a student loan early. Any extra payment reduces your principal, which saves you money on interest over time. If you have multiple loans, paying extra on the highest-interest loan first saves you the most money.