Free Australian business loan repayment calculator. Work out your monthly, fortnightly, or weekly repayments on a business term loan or equipment finance using the standard amortisation formula. Shows the repayment per period, total interest paid, and total amount repaid over the life of the loan. Principal-and-interest only — exclude establishment and account-keeping fees; compare lenders on the comparison rate.
Use the rate (or comparison rate) your lender quotes.
Repayment per month
$0.00
Total Interest
$0.00
Enter your loan amount, interest rate, and term above to see your repayment per period, total interest, and total amount repaid.
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A business term loan is an amortising loan: each repayment is the same amount, but the split between interest and principal shifts over the term. Early repayments are mostly interest (charged on a large outstanding balance); later repayments are mostly principal. By the final payment the balance reaches zero.
The fixed periodic repayment is found with the standard amortisation formula:
Repayment = P × r ÷ (1 − (1 + r)−n)
For a $100,000 business loan at 8% per annum repaid monthly over 5 years: r = 0.08 ÷ 12 = 0.006667 and n = 5 × 12 = 60. The repayment is $100,000 × 0.006667 ÷ (1 − 1.006667−60) = about $2,027.64 per month. Over the full term you repay roughly $121,658, of which about $21,658 is interest.
This is a principal-and-interest estimate only. Australian business loans frequently carry establishment fees, monthly account-keeping fees, and — on fixed rates — break costs if you repay early. Compare lenders using the comparison rate, which bundles most fees into a single figure. Interest on a loan used for business is generally tax-deductible; the principal portion is not.
Switching from monthly to fortnightly or weekly repayments charges interest on a smaller average balance and squeezes in slightly more than 12 monthly payments’ worth each year, so you clear the loan a little sooner and pay marginally less total interest. Toggle the repayment frequency above to compare the schedules.
Business loan repayments use the standard amortisation formula: Payment = P × r / (1 − (1 + r)^−n), where P is the loan amount, r is the periodic interest rate (annual rate divided by the number of payments per year), and n is the total number of payments (term in years × payments per year). For example, a $100,000 loan at 8% p.a. over 5 years repaid monthly has r = 0.08 / 12 and n = 60, giving a repayment of about $2,027.64 per month.
No. This calculator shows principal and interest only. Australian business loans often add establishment fees, monthly account-keeping fees, and sometimes break costs on fixed rates — these are quoted separately by the lender in the loan's comparison rate. Interest on a business loan is generally tax-deductible, but the principal repayment is not. Always check the lender's full schedule of fees and the comparison rate before signing.
Slightly. Paying weekly or fortnightly means you make the equivalent of a little more than 12 monthly payments a year and interest is charged on a smaller average balance, so you pay marginally less total interest and clear the loan a touch faster. This calculator works out the exact per-period figure for monthly, fortnightly, or weekly schedules so you can compare them directly.
Use the actual rate your lender quotes. As a guide, secured business term loans and equipment finance in Australia commonly sit in the high-single-digit to low-teens range, while unsecured business loans and short-term lenders charge more. Rates depend on security, loan size, term, your trading history, and credit profile. If a lender quotes a comparison rate, it bundles in most fees and is the better figure for comparing offers.
Generally yes — the interest portion of repayments on a loan used wholly for business purposes is deductible against your business income, while the principal portion is not. If the loan is used partly for private purposes, only the business-use share of the interest is deductible. Keep clear records and confirm your situation with a registered tax agent.
A fixed-rate business loan locks your interest rate (and therefore your repayment) for a set period, giving certainty but often charging break costs if you repay early or refinance. A variable-rate loan moves with the market, so repayments can rise or fall and extra repayments are usually penalty-free. This calculator assumes a constant rate for the whole term; for a variable loan, re-run it whenever your rate changes.
Sources & methodology
This calculator applies the standard amortisation formula — Payment = P × r / (1 − (1 + r)^−n) — where P is the loan amount, r is the annual interest rate divided by the number of repayments per year, and n is the term in years multiplied by repayments per year (12 monthly, 26 fortnightly, 52 weekly). It shows principal and interest only and excludes establishment, account-keeping, and break fees. Everything is computed in your browser — nothing you enter is stored or sent to a server.
Authoritative sources
Reviewed by Bishal Shrestha — Founder of OneBookPlus, 10+ years building tools with Australian tax-agent and BAS-agent practices. Last reviewed and updated: June 2026.
Disclaimer: This tool produces estimates only and is not credit, legal, or financial advice. Lender criteria, APRA buffer changes, and your individual circumstances will affect the actual figure. Speak to a licensed mortgage broker or financial adviser before acting on these results.
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