farmcfo.com.au/tools/interest-rate-change · 0412 759 847What does a rate change cost us?
Enter your variable and fixed debt with their rates, and the change in percentage points. The calculator shows the yearly interest bill now, the change in interest on the variable debt, and the bill after the change. Fixed debt isn't affected until it rolls off.
Your figures stay in this browser. Nothing is sent to Farm CFO or anyone else.
- Interest a year now
- $140,950
- Change a year
- +$3,750
- Interest a year after
- $144,700
+$313 a month, until fixed loans roll off.
Variable rate 7.48%.
The example is an invented business with $1.5 million variable debt at 7.23% (the RBA average small business rate on new variable and fixed loans, August 2026), $500,000 fixed at 6.5%, and a 0.25 percentage point rise, the size of the RBA's cash rate rise effective 30 September 2026. Your bank may not pass on a change in full or straight away.
The working
- Interest now = variable debt x variable rate + fixed debt x fixed rate.
- Change a year = variable debt x rate change.
- Interest after = interest now + change.
General information only. This calculator doesn't take account of your circumstances and isn't tax, credit or financial product advice. Check figures with your accountant before relying on them.
Want the numbers done for you?
Farm CFO builds the budget, the monthly cashflow and the tests your lender will run, at a fixed price.
Read next: Farm loan covenants
Questions
Does a cash rate change flow straight to my loan?
Not always. Banks set their own rates and timing. Check your bank's notice, then put the change it actually applies here.
What about the overdraft?
Include it in variable debt at the balance you usually carry through the year, not the limit.