Calculate repayments on Australian business loans including term loans, lines of credit, and equipment finance, with total interest and the after-tax interest cost.
Updated October 2026Built and checked by MaverickHow it's calculatedReport an error
Per payment
$3,114
$3,114 / month equiv.
Total interest
$36,825
$27,619 after tax at 25%
Total cost
$186,825
principal + interest, before fees
Interest rate
9.00%
as entered
Interest on money borrowed for the business is generally deductible, so its after-tax cost is lower than the headline figure.
Each payment at the same rate and frequency over different terms. Shorter terms mean higher payments but less interest.
Same rate and term. Paying more often reduces the balance sooner, so slightly less interest accrues.
Business loans come in many forms: secured and unsecured term loans, lines of credit, equipment finance and commercial property loans. Lenders set the rate from the security, the loan type and your business's financials, so this calculator works from the rate you've been quoted. As a reference point, the Reserve Bank's indicator rate for small business variable term loans is 9% (RBA table F5). Enter your loan to see the repayment, total interest, after-tax interest cost and how the term and repayment frequency change them.
As of 7 November 2026, the lowest business loan rate is 6.33%, from SCCU's BUSINESS LOAN, while the typical best across 47 institutions is 7.89%. The lowest business overdraft rate is 8.24%, from IMB Bank's Commercial Credit line, while the typical best across 12 institutions is 10.06%.
A café owner borrows $200,000 at 7.5% over 5 years (secured against property), repaid monthly, to open a second location.
Monthly repayment: $4,008. Total interest: $40,455. Total cost: $240,455. If the business is a company paying the 25% base rate, the after-tax interest cost is $30,342. Paying weekly instead would cut total interest to $39,981.
An e-commerce business borrows $50,000 for inventory at 12% over 2 years (unsecured), repaid monthly.
Monthly repayment: $2,354. Total interest: $6,488. Total cost: $56,488, or $4,866 of interest after tax at 25%. The short term keeps total interest low but means higher repayments than a longer loan would.