Mortgage Repayment Optimizer Configuration

Fields marked * are required.

1. Revenue

Auto-calculated from the loan parts in "Loan Structure" section.
The year and month when the optimisation begins.
Special interest rate requires minimum 20% equity and an ANZ transaction account with salary direct credited
Account bank balance that can be used to repay home loan.
Monthly surplus after tax, necessities, and living expenses. Can be negative if expenses exceed income.
Advanced
How many months into the future the optimiser evaluates. Default 60 (5 years).

Future Income Changes

One-Off Extra Income

Lump sums you expect to receive, such as bonuses, tax refunds, or gifts.

2. Loan Structure

Describe each part of your loan. For a simple loan with no splits, one part is enough.

3. Bank Policy

Settings that depend on your bank's terms and conditions. Check your loan agreement or ask your bank. Defaults are pre-filled for typical NZ bank policies.

Advanced
Maximum number of loan splits your bank allows at the same time.
Flat admin fee charged each time you break or restructure a loan part.
Each year, you can make extra repayments up to this percentage of the anniversary balance without penalty.
The most you can raise your regular payment by each anniversary year without triggering a fee.

Cashback

Percentage of your loan the bank pays you as a cash incentive at drawdown.
If you repay the entire loan within this many months, you must return some or all of the cashback.
Full: repay entire cashback. Pro-rata: repay only for the unused portion of the clawback period.

4. Solver Settings

Tuning parameters for the optimisation engine. Defaults are pre-filled and work well for most cases.

Advanced
A very large cost applied when cash runs out, forcing the solver to avoid bankruptcy. Higher = stronger avoidance.
Approximates how total interest shrinks as principal is repaid over time. Typically 0.55–0.60 for standard mortgages.