Calculate tax-free daily interest savings, equivalent pre-tax yield, and wealth acceleration using New Zealand floating Offset Mortgages and Revolving Credit facilities.
$271.88 / month cash kept
%33 marginal tax bracket equivalent
%5.00 vs term deposit rate
Shielded from floating interest
Configure floating facility parameters and available cash.
Compounding effect of tax-free mortgage interest avoided.
Bank term deposits erode after 33% RWT, yielding only 3.35% net. Avoiding a 7.25% mortgage rate creates a guaranteed, completely risk-free pre-tax equivalent return of 10.82% p.a.
\text{Annual Mortgage Interest Saved} = \text{Effective Offset Cash} \times r_{\text{floating}} \\
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\text{Taxable Savings Return (Net)} = \text{Cash} \times r_{\text{savings}} \times (1 - \text{RWT}) \\
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\text{Pre-Tax Equivalent Yield} = \frac{r_{\text{floating}}}{1 - \text{Marginal Tax Rate}}In New Zealand, earnings in bank savings accounts are heavily penalized by Resident Withholding Tax (up to 39%). Under an Offset Mortgage or Revolving Credit facility, every dollar of linked cash reduces the principal upon which daily floating interest is calculated. Because mortgage interest savings are 100% tax-free, the effective pre-tax yield matches high-double-digit guaranteed returns.
All calculations, amortizations, and scenario projections displayed on this page are strictly for informational and educational purposes. Nothing herein constitutes investment, financial, tax, or legal advice. Actual Reserve Bank of New Zealand (RBNZ) interest rates, IRD PAYE brackets, ACC Earner's Levy, KiwiSaver regulations, and lender criteria may vary. Calconova explicitly disclaims all liability for any decisions taken based upon these calculations. Consult a qualified financial advisor, CPA, or official Inland Revenue documentation prior to executing financial commitments.
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借入希望額、金利、返済期間から月々の均等返済額と総支払額を算出。