If you are wondering what credit score you need to refinance your student loans, the honest answer is that there is no single number written into law. Refinancing is when a private lender — a bank, a credit union, or an online marketplace that shops several lenders — pays off one or more of your existing student loans and issues you a single new private loan, ideally at a lower interest rate or a different term. Because it is a private loan, each lender sets its own approval standards. Still, there are real-world ranges most borrowers run into, and your credit score is only one of several things lenders look at.
The short answer
There is no legal minimum credit score to refinance student loans, but in practice most private lenders want to see at least fair-to-good credit — commonly in the high-600s — before they will approve a refinance. The lowest advertised rates generally go to borrowers with strong credit, often in the 700s. These are general ranges, not a promise or a guaranteed cutoff: one lender might approve a score another would decline, and your income, debt load, and degree all factor in alongside the number. The practical takeaway is to check where you stand, compare a few lenders, and remember that you may or may not qualify for a lower rate than you have now.
What lenders actually check (it isn't only the score)
Your credit score is the headline, but a refinance decision rests on more than three digits. Lenders typically review a fuller picture before approving you and setting your rate:
- Credit score and history. A higher score and a clean payment record signal lower risk and tend to earn better pricing.
- Steady income. Lenders want evidence you can comfortably make the new monthly payment, so they look at how much you earn and how stable that income is.
- Debt-to-income ratio. This compares your monthly debt payments to your monthly income. A lower ratio leaves more room for the new loan and helps your case.
- A completed degree. Many refinance lenders expect you to have finished your program, though some work with borrowers who have not graduated.
Because these pieces interact, a borrower with a moderate score but strong income and low other debt may fare better than a high-score borrower who is stretched thin. There is no formula you can reverse-engineer — which is exactly why comparing several lenders matters.
General score ranges to expect
Think of credit in two tiers when it comes to refinancing. To be approved at all, most lenders look for at least fair-to-good credit, which commonly lands in the high-600s. To capture the lowest advertised rates, you generally need strong credit, often in the 700s. Between those points, you may be approved but at a rate that is higher than the headline numbers you see in marketing.
It is important to treat all of this as a range rather than a fixed line. No lender owes you approval at any particular score, and the rate you are offered depends on your whole profile, not the score in isolation. A variable rate may be quoted lower at first but can rise over time, while a fixed rate stays predictable — so when you compare offers, look at the full terms, not just the lowest teaser number.
How a cosigner can help
If your own credit or income falls short of what a lender wants, a creditworthy cosigner can change the outcome. A cosigner is someone — often a parent or another close relative — who agrees to be equally responsible for the loan. Their stronger credit and income can help you qualify when you would not on your own, and can sometimes earn a lower rate than your profile alone would support.
A cosigner is taking on real risk: if you stop paying, they are on the hook, and the loan affects their credit too. Many lenders offer a cosigner-release option that lets you remove the cosigner after a set number of consecutive on-time payments, once you can qualify on your own. Ask whether release is available and what it requires before you sign, so both of you understand the path to standing alone on the loan.
Checking your rate doesn't hurt your credit
Many borrowers hesitate to shop because they worry about damaging their score. In most cases, pre-qualifying or checking your estimated rate is a soft credit pull, which does not affect your score at all. Only when you submit a formal application does the lender run a hard inquiry, which can cause a small, temporary dip. That means you can usually compare estimated rates across several lenders to see whether you qualify — and at roughly what rate — before committing to anything. For a closer look at how the process touches your credit, see does refinancing student loans hurt your credit? Shopping around is free to the borrower; reputable refinance lenders charge no application or origination fee to you, because the lender, not you, pays the marketplace.
What to do if you don't qualify yet
Being declined today does not mean never. If your credit or income is not where lenders want it, you have a few constructive options:
- Build your credit and re-apply. Paying every bill on time, lowering your credit-card balances, and avoiding new debt can lift your score over months, improving both your odds and your rate.
- Add a creditworthy cosigner. As above, a strong cosigner can bridge the gap now, with release possible later.
- For federal loans, use a federal option instead. If the loans you want relief on are federal, an income-driven plan can lower your monthly payment based on your income without refinancing at all. Learn more in what is income-driven repayment? These free federal options live at studentaid.gov, and they keep your federal protections in place.
Qualifying isn't the only question
One last and important point: being able to refinance is not the same as it being the right move. Refinancing private loans loses nothing federal, so a lower rate is generally a clear win if you qualify. But refinancing federal loans into a private loan is permanent and forfeits federal-only protections — income-driven repayment, federal forgiveness paths such as Public Service Loan Forgiveness, broad deferment and forbearance during hardship or unemployment, and death-and-disability discharge. A private lender is not required to offer any of these, and you cannot move a refinanced loan back to federal. So even with a great score, weigh those benefits first. For the full decision frame, read should I refinance my student loans? and check whether the math works in is student loan refinancing worth it?
This page is general information, not financial advice. Refinancing federal student loans into a private loan permanently gives up federal protections, so weigh those benefits before you decide — and compare offers from more than one lender.