Can Refinancing Student Loans Cost More? 2026 Calculator

Three Ways a Refinance Can Backfire

The first and most frequent trap is a longer term. Dropping from a 10-year repayment to a 20-year term can cut the monthly bill dramatically, but the total interest roughly triples because you are paying a balance that shrinks far more slowly. Even a modestly lower rate may not offset those additional years of compounding when the term extends by a decade or more.

The second risk is choosing a variable rate that starts low but climbs. If the benchmark rises sharply after you lock in, the effective cost of the new loan can exceed the fixed rate you left behind. The third cost is invisible: refinancing a federal loan into a private one permanently removes access to income-driven repayment, loan forgiveness programmes, and federal forbearance protections. If your income drops or you enter a qualifying public-service role later, those lost options can be worth far more than any interest-rate differential.

How to Test Whether Your Offer Actually Saves

The clearest test is total cost over the remaining life of your current loan compared with total cost over the full proposed refi term. A genuine saving shows up as a lower total-dollar figure, not merely a lower monthly payment. Run both through the calculator above, keeping the term the same as your current remaining term so you are comparing like with like rather than obscuring the comparison with a different timeline.

If you must extend the term for cash-flow reasons, quantify the extra interest and treat it as the price of that breathing room. The break-even calculator shows exactly how many months it takes for a rate reduction to overcome any additional cost, and the refinance evaluation tool maps the full savings or loss across different term lengths so you can see where the crossover happens.

This page highlights when refinancing costs more. For the opposite view, see the refinance savings calculator, which models scenarios where refinancing clearly helps.