Key takeaways
- A break cost applies when you exit a fixed loan early — refinancing, selling or paying out.
- It mainly reflects how much wholesale rates have moved since you fixed.
- It can be minimal or run into tens of thousands — never assume.
- Always get the exact figure in writing from your lender before acting.
Fixed rates feel safe — until you want to leave one. The break cost is the catch, and it’s the number that turns an obvious-looking refinance into a bad idea, or occasionally the reverse. It isn’t a penalty designed to trap you; it’s the lender recovering the funding it locked in on your behalf. But it can be big, so it’s the first thing to check.
Why it exists
When you fix, the lender locks in funding at a set cost for your term. If you leave early, that arrangement is broken — and if wholesale rates have fallen in the meantime, the lender is left holding funding that now costs more than the market rate. The break cost recovers that gap. It’s why the same early exit can cost almost nothing in one rate environment and a fortune in another.
What drives the size
- Rate movement. The bigger the fall in wholesale rates since you fixed, the higher the cost.
- Time remaining. More years left on the fixed term means more to compensate.
- Loan balance. The larger the balance, the larger the figure.
Never refinance out of a fixed loan on the strength of an advertised rate alone. Ask your current lender for the break cost in writing first — it can erase the entire saving in one line. This is the trap covered in our when not to refinance guide.
When paying it still makes sense
If a materially lower rate, an equity release, or a needed restructure saves you more than the break cost over the time you’ll keep the loan — or if you’re selling regardless — paying it can be the right call. The decision is simple arithmetic once you have the real number: break cost versus genuine saving. Our fixed vs variable guide covers how to avoid being caught out in the first place.
Broker Insight. We never let a client leave a fixed loan without getting the break-cost figure in writing first. It can quietly erase an entire saving in a single line.
Thinking of leaving a fixed loan? Check first
We’ll get your break-cost figure, compare it against what a switch would genuinely save, and tell you plainly whether it’s worth it. Free, no obligation.
Book your free game plan callFrequently asked questions
What is a break cost on a fixed home loan?
A break cost is a fee your lender charges if you exit a fixed-rate loan before the fixed term ends — by refinancing, selling, or paying it out early. It compensates the lender for the interest it expected to earn and the cost of the funding it locked in. The size depends mainly on how much wholesale interest rates have moved since you fixed, so it can range from negligible to very large.
How are break costs calculated?
Broadly, the lender compares the rate you locked in with the current wholesale rate for the remaining fixed term, on your outstanding balance. If rates have fallen since you fixed, the break cost can be substantial; if rates have risen, it may be small or minimal. Because it hinges on market movements, only your lender can give you the exact figure — always in writing.
Is it ever worth paying a break cost?
Sometimes. If a much lower rate or a needed restructure saves you more over time than the break cost, or if you’re selling anyway, paying it can make sense. The key is to get the exact figure from your current lender first and weigh it against the genuine saving — never assume it’s small, and never refinance a fixed loan without checking.
This guide is general information only and does not take your personal circumstances into account. It is not financial or credit advice. Government schemes, lender policies, rates and tax rules change over time and eligibility criteria apply. Speak with us for advice tailored to your situation.