Banks make mistakes. Their systems are complex. Your offset account interest calculation is done daily — one error compounds into thousands.
Drag and drop your mortgage statements. We accept CSV, Excel, PDF, even photos of paper statements. Our parser extracts every transaction automatically and sorts repayments, interest charges and offset activity.
Our engine totals your mortgage payments and interest charges, recalculates your daily offset balance, applies the correct interest rate, and works out exactly how much interest you should have saved each day.
See the gap between what you were owed and what you got — to the cent. If it's significant, we'll draft a professional letter of demand ready to send to your lender.
WHY WE BUILT OFFSETCHECK
In July 2026, the corporate regulator ASIC reported that Australian banks had paid more than $55 million in compensation for mortgage offset failures — accounts never opened, never linked, or quietly linked to the wrong loan. Most customers never noticed: the repayment stays the same while the interest silently rises.
Offsetcheck exists so you don't have to take the bank's word for it. Upload your statements and check the numbers yourself.
Read the reporting that started this$55M+
Compensation paid by banks for offset failures, Sep 2023 – Aug 2025
8 banks
Reviewed by ASIC — more than 70% of Australia's home-loan market
$349.1B
Held in offset accounts as of March 2026 — up 28% in two years
55%
Of Australian home loans now include an offset facility
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