This calculator helps you estimate how much interest and loan term you can save using the loan amount, property taxes and the interest rate of the loan to determine what your monthly payments on an offset mortgage would be.
Conclusion: It does not take into account any possible fees i.e. up-front fees or ongoing fees. Interest rate does not change over the loan term. Interest is calculated by compounding on the same repayment frequency selected, i.e. weekly, fortnightly, monthly. In practice, interest compounding frequency may not be the same as repayment frequency.