Fixed Rate Break Costs:
What They Are and When They Apply

What Is a Break Cost?

When you take a fixed rate home loan, your lender doesn't keep your money in a vault. They fund it from wholesale financial markets at a fixed cost, matching the term to your loan. If you repay or exit the loan before the fixed term ends, the lender is left holding a funding position they can no longer match to you.

A break cost (also called an early repayment cost, break fee, or economic cost break) is the compensation the lender charges to cover this funding mismatch. It is not a penalty — it's a genuine economic transfer based on interest rate movements in the wholesale market.

When Do Break Costs Apply?

Trigger Event	Break Cost Applies?
Refinancing to another lender mid-fixed term	✅ Yes
Selling the property and repaying the loan	✅ Yes (unless loan is portable)
Switching to variable rate with same lender	✅ Yes
Making extra repayments above the annual allowance	✅ Yes (on excess amount)
Fixed term expiring naturally	❌ No
Making repayments within the annual limit	❌ No
Redrawing from a fixed rate offset (rare)	❌ No

How Break Costs Are Calculated

Lenders use their internal cost of funds (the wholesale bank bill swap rate, or BBSW), not their published fixed rates. This means you cannot calculate an exact break cost yourself — only the lender can, because the input is their internal funding rate at the time you fixed and today's equivalent rate for the remaining term.

The general formula is:

The lender's funding rate is the rate at which they sourced funds when you fixed. If today's wholesale rate for the remaining term is lower than that, the lender takes a loss on re-lending — you compensate them for that difference.

Worked Example: When Rates Have Fallen

Suppose you fixed at 5.5% in January 2024 for 3 years. Two years later, equivalent 1-year wholesale rates have fallen to 4.0%. You have $500,000 remaining on the loan with 12 months left on the fixed term.

Input	Value
Your lender's funding rate (when you fixed)	5.5%
Current wholesale rate (1-year term)	4.0%
Rate differential	1.5%
Outstanding balance	$500,000
Remaining fixed term	1 year
Estimated break cost	$500,000 × 1.5% × 1 = $7,500

This is an estimate — your actual break cost may differ because lenders apply a slightly different version of this formula (and may include administration components). Always request the exact figure in writing.

Worked Example: When Rates Have Risen

Now suppose rates have risen. You fixed at 5.5%. Current 1-year wholesale rates are 6.5%. Same $500,000 balance, 12 months remaining.

Input	Value
Your lender's funding rate	5.5%
Current wholesale rate	6.5%
Rate differential	–1.0% (lender benefits)
Break cost	$0 (or very close to zero)

In this scenario, breaking the fixed rate costs you nothing (or negligible administration fees only). You are free to refinance without penalty — and this is precisely the time many borrowers should explore it.

Total Cost to Exit a Fixed Rate Loan

The break cost is not the only cost. When you exit a fixed rate loan, expect:

Cost	Typical Amount	Avoidable?
Break cost (economic cost)	$0 – $30,000+	Only avoidable if rates have risen
Discharge fee (current lender)	$150 – $500	No — standard administrative fee
New lender application fee	$0 – $600	Many lenders waive for refinancers
Valuation fee (new lender)	$200 – $600	Some lenders cover this
Government registration fee (NSW)	~$160	No
Legal / settlement fee	$200 – $500	No
Total exit + entry costs	$800 – $32,000+

The Break-Even Calculation: Is It Worth It?

The core question is always: how long will it take to recoup the total exit cost through lower repayments?

Example break-even calculation

Item	Value
Break cost	$7,500
Other exit + entry costs	$1,200
Total to recoup	$8,700
Current rate (fixed)	5.5%
New rate (variable/new fixed)	4.9%
Rate saving	0.6%
Loan balance	$500,000
Monthly interest saving	$500,000 × 0.6% ÷ 12 = $250
Break-even period	$8,700 ÷ $250 = 34.8 months (approx. 3 years)

In this example, if you plan to hold the loan for more than 3 years, breaking is financially worthwhile. If you're planning to sell in 2 years, it's not.

How to Minimise Break Costs

• Wait for rates to rise — if you suspect rates will climb further, waiting a few months can reduce the break cost significantly, or to zero
• Use your annual extra repayment allowance first — most fixed loans allow $10,000–$30,000 in additional repayments per year without triggering break costs. Maximise this before breaking
• Break closer to expiry — break costs decrease as the remaining fixed term shortens, because the funding mismatch period is shorter
• Use a portable loan — if your loan has portability, you can carry it to a new property without triggering break costs when you sell
• Negotiate the entry costs — while break costs aren't negotiable, a broker can sometimes negotiate away other entry costs (application, valuation, cashback deals) to offset the total

Fixed vs Variable: What to Do When Your Fixed Rate Expires

When your fixed term ends naturally (no break cost), you typically roll onto the lender's standard variable rate — which is usually significantly higher than the best available rate in the market.

This "rate cliff" is when most refinancing should happen. You owe no break cost, and the rate differential between your roll-off rate and a competitive new loan is often 0.5–1.5%.

Frequently Asked Questions