How it works
A refinance breakeven point is the moment when the interest a new loan has saved you catches up to what switching cost you — the fees, plus any extra interest hiding in a longer term. Before that month, the refinance is underwater; after it, every payment is pure gain. The calculator simulates your current loan and the offer side by side, month by month, tracking cumulative interest on each. When cumulative interest avoided first exceeds the upfront fees, that month is your breakeven. This matters because headline savings lie by omission: dropping from 6.8% to 4.99% looks like an easy win, but stretching 114 remaining months into a fresh 120-month term can quietly reprice most of that gain, and $250 of lender fees must be clawed back before anything is truly saved. The lifetime figure shown here is the honest one — total interest under each loan minus fees — while the yearly table shows exactly when the advantage turns positive. If the verdict reads never, the deal only makes sense with lower fees, a shorter term, or a bigger rate gap.
Formula
Breakeven month = first m where (cumulative interest avoided ≥ fees); lifetime net = old total interest − new total interest − fees
Tips
- Refinancing federal loans trades away federal protections permanently — price that loss, not just the rate.
- Keep the new term no longer than the months you have left unless cash flow forces it.
- Fees above roughly one percent of balance need a big rate gap to overcome — negotiate or walk.
- Run the numbers again if rates fall further; breakevens move as quotes move.
- If the verdict is never, ask the lender for a fee waiver before abandoning the switch.
Frequently asked questions
- How do I calculate the breakeven point on refinancing?
- Divide the upfront fees by the monthly interest saved — but that shortcut ignores term changes. The proper method simulates both loans and finds the month cumulative interest avoided exceeds fees. On this default setup ($38,500, 6.8% to 4.99%), the crossover lands in month five — inside a single quarter of payments — despite the term difference.
- Is it worth refinancing student loans for 1 percent?
- Often yes, early in the loan. One point off a $38,500 balance with nine-plus years remaining saves thousands over the term. Late in the loan, or paired with a stretched term, one point can save almost nothing — which is precisely what the breakeven month exposes.
- Does refinancing student loans hurt your credit?
- Temporarily: the application adds a hard inquiry and the new account shortens average history length, typically costing a few points for a few months. Paying off the old loan can also shift utilization. For most borrowers the score recovers within six months of clean payments.
- What happens to federal protections if I refinance?
- They end. Income-driven repayment, federal deferment and forbearance options, and federal forgiveness programs do not transfer to private lenders. Borrowers confident they will repay on a standard schedule give up little; anyone who might need those safety valves should weigh them heavily first.
- Should I shorten or extend my term when refinancing?
- Shorten whenever the budget allows — it compounds the rate drop into real savings. Extending lowers the payment but adds months of interest, which can consume the entire benefit of a better rate. The lifetime figure in this calculator nets both effects so relief today cannot pose as savings overall.