Plan extra repayments around a mortgage refix

Refix is a contract decision point

Sorted describes choosing another fixed term or moving to floating when the current fixed period ends. This is a chance to review rate, split size, repayment frequency, flexibility and expected cash needs.

Simply accepting the first offer can miss structural issues. A shorter fixed period may provide an earlier review but less certainty; a longer period may increase break-fee exposure if plans change.

Example: project the refix balance

A homeowner has six months left fixed and considers regular extra payments. They model zero extra and the affordable amount through the expiry date. The two projected balances become inputs for actual refix offers.

They ask whether a saved lump sum can be paid on the expiry date without breaking the fixed contract and obtain the process in writing. Future rate scenarios are applied only after the refix balance, not to today’s full balance for the entire original term.

Refix preparation sequence

1. Record every split’s expiry date and current balance.
2. Estimate balances at those dates under realistic extras.
3. Stress-test the budget at higher required payments.
4. Compare fixed, floating and split structures.
5. Confirm the penalty-free lump-sum timing.
6. Update the schedule after the new contract is known.

Rate and timing risks

No article can predict refix rates. An early-fix offer may provide certainty but can differ from later market options and may have its own effective date. Compare actual written offers and all fees.

• Do not spend the payment buffer before refixing.
• Check whether cashback must be repaid if switching.
• Review legal and discharge costs.
• Keep emergency funds accessible.
• Contact the lender early if affordability is tight.

Use a calculator as a scenario, not a promise

Model only through the known fixed period first. Then rerun the estimated refix balance at each candidate rate and structure; Payoff Atlas keeps rates constant within each run and does not predict the offer.

The New Zealand model accrues interest across actual calendar days, using 365 days or 366 in a leap year. It supports monthly, fortnightly and weekly schedules and treats a stable offset balance separately from principal.

The estimate holds the entered rate constant, assumes extras reach principal and excludes revolving-credit cash flow. Fixed-loan limits, refix rates, break fees, posting and lender rounding can change the actual result.

Review the plan before money leaves

Compare a zero-extra case, the intended plan and an interrupted plan with identical starting inputs. For floating or split debt, rerun at other rates without presenting them as predictions. Stop the projection at a refix date when the next rate is not known.

Keep the loan agreement, latest statement and written lender answers about fixed-loan limits, break fees and payment allocation. Model each split separately when its rate, fixed expiry, offset treatment or flexibility differs.

• Secure required repayments and essential costs first.
• Keep emergency and planned-expense cash accessible.
• Name the intended loan split for an extra payment.
• Verify the transaction and principal on the next statement.
• Rerun after a refix, rate change, fee or product restructure.