Do You Have to Pay Sallie Mae While in School?

Whether you have to pay Sallie Mae while in school depends entirely on which repayment option you chose when you signed for the loan. Sallie Mae’s Smart Option Student Loan gives you three choices at application: deferred repayment (no payments while enrolled), fixed repayment ($25 a month), or interest repayment (the full interest charge each month). Two of those three require you to send money every month starting as soon as the loan is disbursed. The third lets you pay nothing until after you leave school, but interest still piles up in the background.

The Three In-School Payment Choices

You lock in your option during the application, before your first semester begins. Federal law requires Sallie Mae to disclose all costs, interest rates, deferral options, and repayment terms before you finalize the loan.¹ Once you sign, that choice controls what you owe throughout school and during the six-month separation period that follows.

Under deferred repayment, you owe nothing month to month while enrolled or during the separation period. Interest still accrues and gets added to your balance, so what you owe grows the whole time.²

Under fixed repayment, you owe a flat $25 each month while in school and during the separation period. That payment chips at accruing interest but usually does not cover all of it, so your balance still grows, just more slowly.²

Under interest repayment, you owe the full amount of interest that accrues each month. The dollar amount fluctuates with your balance and rate, but paying it keeps your principal from growing at all.²

If you’re not sure which one you chose, check your original loan disclosure or log into your Sallie Mae account. The option is set in the loan agreement and doesn’t change on its own.

How In-School Deferment Stays Active

If you chose deferred repayment, your no-payment status depends on staying enrolled at least half-time at an eligible school. Half-time is defined by the school itself, but for undergraduates it usually means at least six credit hours per semester. Sallie Mae verifies your enrollment through the National Student Clearinghouse.³

If your school reports to the Clearinghouse, that verification happens automatically. If it doesn’t, you need to send Sallie Mae an in-school deferment request form yourself.³ In-school deferment on a Sallie Mae undergraduate or graduate loan can last up to 48 months in total.

A few things end deferment sooner than you might expect:

Your credit hours drop below the half-time threshold. Your separation period starts and repayment follows.
You take a leave of absence or a gap semester. Same result.
You transfer to a school that isn’t accredited. Deferment ends.

How Interest Builds While You’re Enrolled

Interest on a Sallie Mae private loan accrues daily no matter which option you chose.⁴ If you chose deferred or fixed repayment, some or all of that interest goes unpaid and accumulates.

When your in-school period and six-month separation period end, Sallie Mae adds that unpaid interest to your original principal balance. This is called capitalization, and from that point forward interest is calculated on the new, higher number. Deferred borrowers feel this most: you end up paying interest on interest for the rest of the loan.⁵

Put concrete numbers on it. Borrow $10,000 at 7 percent and defer through four years of school plus the six-month separation period, and roughly $3,150 in interest builds up. That gets added to your principal, so the balance you begin repaying is about $13,150, and every future interest charge is based on that larger figure. The interest-only option avoids this entirely. The $25 fixed option reduces it but doesn’t eliminate it.

What Happens If You Skip a Required In-School Payment

If you chose fixed or interest repayment, those monthly payments are required as soon as the loan is disbursed. Miss one and Sallie Mae charges a late fee of 5 percent of the past-due amount, capped at $25. A returned payment brings a separate fee of up to $20.⁶

Missed payments also go on your credit report. A single late payment can drag down your score and stay on the report for up to seven years. If your account reaches 120 days past due, Sallie Mae typically treats the loan as in default. A defaulted private loan cannot be rehabilitated through a structured federal-style program; the lender’s options are to send the account to collections or to sue you.

Sallie Mae cannot garnish your wages or seize a bank account without first winning a lawsuit against you. That’s a real difference from federal student loans, where the government can garnish administratively. Once a private lender wins a judgment, though, wage garnishment, bank levies, and property liens become available under your state’s civil collection rules. If you have a co-signer, they are on the hook for anything you don’t pay, and their credit takes the same hits yours does.

When Full Payments Actually Start

Once you graduate, drop below half-time enrollment, or leave school, a six-month separation period begins. During that window your in-school terms continue: if you were deferred you still owe nothing, and if you were on the $25 fixed plan that continues.²

When the separation period ends, all three options converge into full principal-and-interest repayment. Any unpaid interest capitalizes at that point, and your new monthly payment reflects the full balance. Sallie Mae sends a billing statement before the first full payment is due, showing the capitalized balance, your interest rate (updated if it’s variable), and the monthly amount needed to pay off the loan within the term. Repayment terms on the Smart Option Student Loan generally run 10 to 15 years.

Ways To Owe Less By The Time You Graduate

Even if you technically don’t have to pay Sallie Mae while in school, small voluntary payments now save real money later. Every dollar of interest you pay while enrolled is a dollar that won’t get capitalized into your principal.

If you chose deferred repayment, nothing stops you from sending payments anyway. Even $50 or $100 a month toward accruing interest meaningfully reduces what you owe over the life of the loan.

Sallie Mae also offers a 0.25 percentage point interest rate reduction when you enroll in automatic debit.⁷ Either you or the co-signer can set it up. On a $20,000 loan the quarter-point saves several hundred dollars over the full term, and it removes the risk of accidentally missing a payment.

If you do make interest payments while in school, you can generally deduct up to $2,500 a year in student loan interest on your federal income tax return.⁸ It’s an above-the-line deduction, so you don’t have to itemize. For tax year 2025, the deduction begins to phase out above $85,000 in modified adjusted gross income for single filers and $170,000 for joint filers, and disappears at $100,000 and $200,000 respectively.⁹ Most students earning income during school are well under those limits and can take the full deduction.

If a real financial problem hits while you’re enrolled and you’re on the fixed or interest plan, ask Sallie Mae about hardship forbearance. It can pause or reduce payments for up to 12 months, though interest keeps accruing the whole time.¹⁰ It’s a short-term fix, not a plan.

1
Office of the Law Revision Counsel. 15 USC 1638 – Transactions Other Than Under an Open End Credit Plan
2
Sallie Mae Bank. Private Education Loan – Smart Option Student Loan Application and Solicitation Disclosure
3
Sallie Mae. Deferring Payments for School or Internship
4
Sallie Mae. Pay Off Your Student Loan Faster
5
Consumer Financial Protection Bureau. Tips for Paying Off Student Loans More Easily
6
Sallie Mae. Private Education Loan Application and Solicitation Disclosure
7
Sallie Mae. Undergraduate Student Loans
8
Office of the Law Revision Counsel. 26 USC 221 – Interest on Education Loans
9
Internal Revenue Service. Publication 970 (2025), Tax Benefits for Education
10
Sallie Mae. When Do You Have to Start Paying Back Student Loans