Offset calculator
Quantify the trade-off between liquidity and interest savings before choosing your loan setup.
Monthly repayment$3,062
$602,444Total interest
$1,102,444Total paid
30y 1mPayoff
Stress Test
What happens if rates rise?
Extra Repayments
Pay off faster, save interest
Offset Account
Interest savings from offset balance
Offset impact
Interest without offset
$850,738Interest with offset
$672,172Estimated interest saved
$178,566Estimated years saved
3.33 yrsWith-offset amortization preview
First 18 periods
| Period | Payment | Interest | Principal | Balance |
|---|---|---|---|---|
| 1 | $4,363 | $3,457 | $906 | $719,094 |
| 2 | $4,363 | $3,452 | $911 | $718,182 |
| 3 | $4,363 | $3,447 | $916 | $717,267 |
| 4 | $4,363 | $3,443 | $920 | $716,346 |
| 5 | $4,363 | $3,438 | $925 | $715,421 |
| 6 | $4,363 | $3,433 | $930 | $714,491 |
| 7 | $4,363 | $3,429 | $934 | $713,557 |
| 8 | $4,363 | $3,424 | $939 | $712,618 |
| 9 | $4,363 | $3,419 | $944 | $711,674 |
| 10 | $4,363 | $3,414 | $949 | $710,725 |
| 11 | $4,363 | $3,410 | $954 | $709,771 |
| 12 | $4,363 | $3,405 | $958 | $708,813 |
| 13 | $4,363 | $3,400 | $963 | $707,849 |
| 14 | $4,363 | $3,395 | $968 | $706,881 |
| 15 | $4,363 | $3,390 | $973 | $705,908 |
| 16 | $4,363 | $3,385 | $978 | $704,930 |
| 17 | $4,363 | $3,380 | $983 | $703,947 |
| 18 | $4,363 | $3,375 | $988 | $702,959 |
Upfront Costs
Deposit, stamp duty, and settlement costs
Compare Scenarios
Score and compare loan quotes
Offset cash can feel "untouched" while still working for you. This tool makes invisible interest savings explicit. Offset usually preserves access to cash. That flexibility has value, especially when income or expenses are uncertain.
Higher package fees can erode savings. Evaluate net benefit after fees, not gross interest saved alone. Offset is powerful when balances are stable and fees are justified.
Frequently Asked Questions
- How does an offset account reduce mortgage interest?
- Interest is charged on loan balance minus offset balance, so a stable offset balance reduces interest each period.
- Is offset better than extra repayments?
- Offset keeps cash accessible, while extra repayments directly reduce principal. The better choice depends on flexibility needs and fee structure.
- Does this include package and account fees?
- No. This tool models repayment and interest only. Add lender package or account fees separately.