Mortgage break fees in NZ: why banks charge them and how they work

A break fee (banks also call it an early repayment charge or early repayment recovery) is what a New Zealand bank may charge when you repay, switch or restructure a fixed-rate loan before the fixed term ends. The law lets a lender recover only a reasonable estimate of its loss, and the credit regulations set out a formula that is presumed reasonable. The regulations’ own worked examples give fees of $58.57, $0 and $31.79. On a bigger, more typical loan the numbers grow: we estimate about $4,456 to break a $490,000 loan fixed at 6.00% with 12 months to run, if the bank’s current one-year rate is 5.06% (the average advertised rate, as at 10 November 2026). If rates have risen above your fixed rate, the formula gives no fee at all.

Why banks charge a break fee

When you fix your rate, the bank commits to lending you money at that rate for one, two, three or five years. To do that safely it arranges its own funding for the same period, usually in the wholesale market. If you then repay early and wholesale rates have fallen since you fixed, the bank is left with funding it must keep paying for, and it can only relend your money at today’s lower rates. The difference over the rest of your fixed term is its loss.

The reverse is also true. If rates have risen since you fixed, the bank can relend your money at a higher rate than you were paying, so it has no loss. In that case there is usually no break fee (some banks may still charge a small administration fee, which must be set out in your contract).

That is why the same loan can cost nothing to break one month and thousands of dollars a few months later. Kiwibank puts it plainly: break costs are “different for each person and change day to day”.

Break fees apply to fixed loans. Floating loans and revolving credit can be repaid at any time without one, which is part of the trade-off we cover in fixed vs floating.

What the law allows

The Credit Contracts and Consumer Finance Act 2003 (CCCFA) lets a lender charge, on full prepayment, only a reasonable estimate of its loss (section 54(1)(a), cited in the regulations). The Commerce Commission summed this up in 2010: a creditor may recover only “a reasonable estimate of their loss on prepayment”.

Three rules follow from that:

• Your contract must tell you the method. The initial disclosure statement has to say how the bank calculates its reasonable estimate of loss and whether it uses the statutory procedure in the regulations.
• There is a safe harbour. The Credit Contracts and Consumer Finance Regulations 2004, regulations 8 to 11, set formulas. A fee worked out with the regulations’ formula is presumed reasonable. A bank that uses its own method can still be reasonable, but it is assessed case by case.
• There is a regulator. From 1 July 2026 the Financial Markets Authority (FMA) took over from the Commerce Commission as the regulator of the CCCFA. If you think a fee is unreasonable, the bank’s complaints process and its dispute resolution scheme come first; the FMA oversees the law.

The Commerce Commission’s 2010 investigation found both of the methods banks used at the time (one based on changes in retail rates, the other on wholesale rates) were “likely” reasonable. Two lenders, Kiwibank (about $689,000) and HSBC (about $113,000), made ex gratia payments to customers over defects in their formulas. Methods may have changed since 2010.

The safe-harbour formula, in plain English

The regulations value what you would have paid the bank for the rest of the fixed term, using the bank’s current rate, and compare that with what you owe today. If the value of the remaining repayments is more than the balance, the bank has lost money and the difference is the fee. If it is less, the fee is zero.

For a typical New Zealand mortgage, fixed for part of a longer term, regulation 11 applies:

• VFP (value of future payments) = p × ((1 − vⁿ) ÷ (i ÷ f)) × (1 + i)^d/365 + vⁿ × (1 + i)^d/365 × EB
• v = 1 ÷ (1 + i ÷ f)
• EB (balance at the end of the fixed term) = u + IC − TP
• Fee = VFP − u, or zero if that is negative

Where p is your repayment, n the repayments left in the fixed term, f the repayments a year, d the days since the last repayment was due, u what you owe now, IC the interest and TP the repayments that would have fallen due over the rest of the fixed term. The key input is i: the bank’s current rate for the fixed term nearest to the time you have left. If two terms are equally near, the regulations use the higher rate. Regulation 9 is the simpler version for a loan fixed for its whole term, without the EB part.

The nearest-term rule matters. Using the average advertised rates as at 10 November 2026, with 12 months left the comparison rate is the one-year rate (5.06%). With 9 months left the six-month (4.82%) and one-year (5.06%) terms are equally near, so the higher one-year rate is used. With 15 months left the one-year and 18-month terms are equally near, so the 18-month rate (5.27%) is used.

The regulations’ own worked examples

The regulations include worked examples, and our break fee calculator reproduces each one to the cent. All three use a $5,000 loan over two years at 12%, repaid with 24 monthly repayments of $235.37, and repaid in full 6 months and 5 days in, when $3,865.66 is owed.

The third example is the one that looks most like a real mortgage: only six repayments are left in the fixed period, so only six months of lost margin count, and the fee is smaller than in the first example even though the rate fall is the same. The example’s figures for the balance ($3,865.66) and the interest still to come ($195.67) are given in the regulations, and we use them exactly as printed.

Worked example: a $490,000 mortgage

Small loans make small fees. Here is the same formula on a loan closer to what many households carry: $490,000 owing, 29 years left, fixed at 6.00%, monthly repayments of $2,974.33. We use the average advertised rate for the nearest term, as at 10 November 2026, as the bank’s current rate.

Two patterns stand out. The bigger the fall in rates, the bigger the fee, and the longer the time left, the bigger the fee. A rough check is the rate gap times the balance times the years left: 0.94 percentage points on $490,000 for one year is about $4,600, close to the $4,455.63 the formula gives once it allows for the balance falling and for discounting.

These are estimates using a hypothetical 6.00% fixed rate and average advertised rates as at 10 November 2026. Your own bank’s figure will differ, for the reasons below.

Why your bank’s quote will differ

The safe-harbour formula uses the bank’s advertised (retail) rate. Many banks instead use wholesale swap rates, the rates banks pay to fund fixed lending, which we cannot see and which move every day.

• ANZ calls its fee an “Early Repayment Recovery”. Its fixed rate page does not set out the method.
• BNZ says the charge depends on the amount repaid, “whether the current wholesale rates are lower than the original wholesale rates at the start of the fixed rate period, and if so, by how much”, and the time left. The full method is in its Facility Master Agreement (clause 9.9).
• Kiwibank says “we calculate whether this will result in a loss for Kiwibank”, with the method in its Home Loan Terms and Conditions.

We could not read ASB’s or Westpac’s method this session. Because retail rates include the bank’s margin and wholesale rates do not, the two approaches can give noticeably different answers, especially when banks are competing hard on specials. Treat our estimate as a sense check, and always ask the bank for a written quote on the day you plan to break. Quotes usually hold only for that day.

Ways to reduce or avoid a break fee

• Use your allowance. Most banks let you repay some extra during a fixed term without a fee. ANZ allows up to $250 a week more and one lump sum a year of up to 5% of the loan; BNZ allows up to 5% of the balance a year; Kiwibank allows up to 5% of the loan amount at the start of the fixed term each year (bank pages accessed 10 November 2026). Our guides to extra repayments and lump sums explain how far those allowances go.
• Wait for the fixed term to end. On the last day of a fixed term there is nothing to break. If you are thinking of switching or repaying a large sum, the expiry date is usually the cheapest moment. See how to refix.
• Break only part. If your loan is split, you may only need to break one part. Shorter fixed parts reach expiry sooner, which is one reason people use split loans.
• Do the sums both ways. If you break to move to a lower rate, the interest you save over the rest of the old term is often close to the break fee, because the formula is designed to measure exactly that gap. We show this in switching banks.
• Check the timing in rising markets. If rates have risen since you fixed, the fee may be zero, so selling or repaying early may cost less than you fear.

This is general information, not financial advice. A mortgage adviser or your bank can tell you the exact fee for your loan. Rates as at 10 November 2026.

Questions people ask

Can a bank charge any break fee it likes?

No. Under the CCCFA a lender may recover only a reasonable estimate of its loss, and your contract must say how that estimate is worked out. A fee calculated with the regulations’ formula is presumed reasonable. The FMA has regulated the CCCFA since 1 July 2026.

Why is there no break fee when rates have gone up?

Because the bank has no loss. It can relend your money at a higher rate than you were paying. The regulations’ second worked example shows this: the formula gives −$85.55, so the fee is $0.

Will your calculator give the same figure as my bank?

Probably not exactly. We use the regulations’ safe-harbour formula with the bank’s advertised rate for the nearest term. Many banks use wholesale swap rates, which differ. Use ours to sense-check a quote, and get the real figure in writing from your bank.

Do I pay a break fee on a floating loan?

No. Floating loans and revolving credit can be repaid at any time without a break fee. Break fees apply to fixed rates, and to the fixed part of a split loan.