Mortgage break-cost estimate

A workshop prototype for understanding the two parts of a fixed-rate break cost. It is not published for decisions and cannot replace a bank’s written quote.

Prototype · not for decisions
Estimate assumptions

Model the fixed term, then stress the rate gap.

These inputs stay in this browser tab. The current-rate comparison is a placeholder until a validated wholesale-rate feed is connected.

Prototype output$3,450–$6,150
Fixed or administration cost$200–$400Possible bank/admin component
Variable wholesale-rate cost$3,250–$5,7501.00 percentage points of rate gap

The actual break cost is set by the lender’s formula, current wholesale rates, loan balance, and time remaining. Ask the bank for a written quote on the day.

Why this needs validation

The variable part is not a standard percentage.

It reflects the lender’s loss if it has funded your fixed loan at a higher wholesale rate and you repay before the term ends.

Wholesale funding movement

If comparable wholesale rates are higher or unchanged, the rate-loss component may be zero. If they have fallen, the component can grow.

Balance and time

A larger balance and more months remaining generally create more exposure, subject to the bank’s exact formula and any allowed repayments.

Fixed charges

Separate administration, discharge, rate-lock, or legal fees can apply. They vary by lender and loan documents.

Not a live calculator yet

This page is intentionally unlisted and no-indexed. It is a prototype only while MoreGage validates current wholesale-rate sources, bank formulas, permitted repayment allowances, and fixed fees. It must not be used to decide whether to break a loan.

Sources for the model shape: BNZ early repayment charges, Westpac prepayment costs, and ANZ home-loan terms.

This is a complete estimate under the assumptions shown, presented as a range rather than a factual amount. If your fixed rate is below the comparable floating or refix rate, the estimated rate-loss component is generally near zero; administration and contract-specific costs may still apply. Ask your lender for a written quote before acting.