Using a Cash-Out Refinance to Pay Off Student Loans: How It Works and Whether It's Worth It

Start With the Rate Math, Not the Idea

If you're weighing whether to roll student loans into your mortgage, this is one of the questions I get asked most directly: "Should I just roll my student loans into my mortgage?" The honest answer is that it depends on three things clearing at once, not one. Before you spend time gathering documents and pulling your equity number, it's worth running the qualification gate first, because that's what actually determines whether this move is even available to you, let alone whether it's smart.

The first gate is the simplest to check and the one people skip because they assume the answer is obvious. It isn't always. Federal direct undergraduate loans currently carry a fixed rate of 6.52% for the life of the loan. Graduate and professional Direct Unsubsidized loans sit at 8.07%, and Direct PLUS loans run 9.07%. Meanwhile, the 30-year fixed conventional mortgage rate has been averaging 6.69% in Freddie Mac's weekly survey.

Lay those numbers side by side and you get two very different pictures. If you're carrying graduate-level debt at 8.07% or PLUS debt at 9.07%, you're looking at a real rate drop by moving that balance into a 6.69% mortgage. If you're carrying undergraduate debt at 6.52%, you're not. In that case, the mortgage rate is actually higher than what you're already paying, and the "obvious win" a lot of people assume exists simply isn't there once you check the actual numbers.

This is the part I'd tell you to do first, before anything else: pull your loan servicer statement and find your actual interest rate. Not what you think it is. Not what a friend's rate was. Your number. If it's meaningfully below 6.69%, the rate case for a cash-out refinance is already weak, and everything downstream in this article matters less.

Here's what that looks like with real numbers. Say you're carrying $60,000 in Direct PLUS loans at 9.07%, and a cash-out refinance would let you roll that balance in at 6.69%. The rate spread is 2.38 percentage points. On $60,000, that difference works out to roughly $1,428 less in interest in the first year alone, before accounting for how the balance amortizes. Stretch that same comparison out and the gap compounds every year the balance sits at the lower rate. Now flip the example: $60,000 in undergraduate federal loans at 6.52% moved into a 6.69% mortgage actually costs you about $102 more in interest in that first year, not less, because the mortgage rate sits above what you're already paying. Same balance, same move, opposite result, entirely because of which rate you started with.

The Second Gate: Do You Have the Equity to Make It Worth Doing

Rate spread alone doesn't get you through the door. A cash-out refinance replaces your existing mortgage with a new, larger one, and the difference between the two, minus closing costs, is the cash you receive. Most lenders cap that new loan at a percentage of your home's value, which means the amount of usable cash depends directly on how much equity you've built.

If your equity only supports pulling out a fraction of your student loan balance, you're left holding two debts instead of one: whatever student loan balance remains, plus a larger mortgage. That's rarely an improvement. Here's what the ceiling looks like in practice: on a $250,000 home with an 80% LTV cap, the new mortgage can't exceed $200,000. Subtract a $150,000 existing mortgage balance and the max cash-out is $50,000. If your student loan balance is $50,000 or less, that ceiling covers the whole thing. If it's $80,000, you're left refinancing $50,000 of it into the mortgage and still carrying $30,000 in student loans separately, which usually isn't the simplification you were after.

This is where I'd tell you to be honest about the actual number, not the number you hope your home is worth. A loan officer, whether at AmeriSave or elsewhere, can run your specific equity position and tell you what's realistically available before you get attached to a plan that the numbers won't support.

The Third Gate: Does the New Payment Fit Your DTI

Even when the rate spread favors you and the equity is there, the new blended mortgage payment still has to clear your lender's debt-to-income limits. Rolling student loan debt into your mortgage doesn't make that debt disappear. It reshapes it into a bigger monthly housing payment, and that payment now competes for room against every other underwriting threshold: your credit profile, your reserves, your total monthly obligations.

Here's the part that surprises people: your DTI can look better on paper the moment your loans consolidate into a lower blended rate, but if the new mortgage payment pushes your total housing cost too high relative to your income, that's a problem the previous separate payments didn't create. I've seen borrowers assume a lower combined rate automatically clears the DTI hurdle. It doesn't. The new payment amount is what the underwriting formula actually looks at, not the interest rate you're proud of negotiating down.

Run it with real numbers and the mechanic gets clearer. Say you earn $7,000 a month, pay $1,800 on your current mortgage, and pay $500 a month across your student loans. That's $2,300 in monthly debt against $7,000 in income, a 33% DTI. Now you roll the student loans into a cash-out refinance and your new blended mortgage payment comes to $2,600 a month, with no separate student loan payment left. That's $2,600 against the same $7,000 income, a 37% DTI. The blended rate might be lower than the student loans carried on their own, but the payment itself climbed, and that's the number your lender's DTI threshold actually measures.

See How Much Cash You Qualify For

Our AI calculates your top personalized loan options in minutes.

Calculate My Options

Every file is different. If you're carrying a modest student loan balance with strong existing equity, you might sail through this gate easily. If you're stretching to pull out a large balance against a thin equity cushion, you might find the new payment doesn't leave room for anything else in your budget.

What You Give Up the Moment the Loan Is Paid Off

This is the gate most people don't think to check until it's too late, and it's the one I'd put front and center before anyone applies. Federal student loans come with a set of borrower protections that private, secured mortgage debt simply doesn't have. Income-driven repayment plans that scale your payment to what you actually earn. Deferment and forbearance options if you lose your job or hit a rough financial stretch. Certain forgiveness paths tied to your loan type or employment.

The moment you use a cash-out refinance to pay off those federal loans, all of that goes away, because the debt itself is gone, replaced by a mortgage. The Consumer Financial Protection Bureau is direct about this trade-off: rolling student debt into a home equity loan or cash-out refinance converts unsecured debt, where the worst outcome for missed payments is credit damage and collections, into debt secured by your house, where the worst outcome is foreclosure. That's not a small distinction. It's the whole risk profile of the debt changing shape.

The CFPB's guidance here is worth sitting with before you sign anything: look at direct student loan refinancing first, and confirm you have emergency savings and stable employment before you tap home equity to solve a student debt problem. If your job situation feels uncertain, or you think you might need an income-driven plan down the road, that's a real cost to weigh against whatever rate improvement you're chasing.

The Tax Assumption That Trips People Up

One more piece that can catch you off guard: mortgage interest isn't automatically deductible just because it's mortgage debt. Under IRS Publication 936, mortgage interest is only deductible on the portion of a loan used to buy, build, or substantially improve the home securing it. Cash pulled out and used to pay off student loans doesn't meet that test. It becomes non-deductible home equity debt, even though it's now sitting inside your mortgage.

That matters because if you assume rolling debt into your mortgage automatically makes the interest write-off follow along, it doesn't work that way. If your itemizing strategy currently counts on deducting mortgage interest, know that the portion tied to student loan payoff won't qualify, regardless of your total acquisition debt limit under the $750,000 threshold for loans originated under current tax law ($375,000 if married filing separately), or the $1,000,000 limit for older loans.

Federal Versus Private: The Calculus Isn't the Same

I'd separate this conversation depending on which type of student loan you're carrying, because most explanations blur the two together and they really shouldn't be treated the same. Federal loans carry the protections described above: income-driven repayment, deferment, forbearance, forgiveness paths tied to employment or loan type. Those are real, usable safety nets that disappear the moment the debt gets paid off through a refinance.

Private student loans generally don't carry those same federal protections to begin with. If your debt is private, the calculus shifts more toward a straightforward rate-and-payment comparison, since you're not giving up federal-specific protections you don't already have. That doesn't mean the equity and DTI gates stop mattering. It just means the fourth gate, the protections you'd forfeit, carries less weight if you're a private-loan borrower than it does if your loans are federal.

Running the Gate Before You Apply

Shopping with someone else's numbers is the fastest way to talk yourself into the wrong move here. Your neighbor's decision to roll their student loans into a refinance tells you nothing about whether it fits your equity, your DTI, or your loan type. Run your own numbers through all three checkpoints, in order: compare your actual student loan rate against current conventional rates, confirm your equity supports pulling out enough to matter, and check whether the new blended payment clears your lender's DTI threshold with room to spare.

The goal here should always be to keep the path to a good decision as clear as possible. That means getting the rate comparison answered upfront, getting your real equity number from a loan officer instead of a guess, and making sure the DTI math gets checked before you're attached to a plan the numbers won't support. If you have a question about any of the three, ask it. If something about what you'd be giving up isn't clear, get it clarified before you apply, not after. If all three gates clear, and you're not relying on federal protections you might need later, this can be a reasonable way to consolidate debt into a single, potentially lower-rate payment. If one doesn't clear, the more common path is to look at direct student loan refinancing first, or to hold off and revisit the equity and rate picture down the road. At AmeriSave, this is the conversation I'd want to have with you before you ever fill out an application, so you end up at closing with no surprises, not a payment you didn't fully understand going in.