Truck Loan Repayment Calculator: How to Work Out Your Monthly Payments

Before you sign for a prime mover, tipper or rigid, you need to know what it will cost you each month. A truck finance calculator gives you that number in seconds, but it only helps if you understand what you are typing in. This guide shows you how a truck loan repayment calculator works, how to do the maths yourself, and how deposit, loan term, interest rate and balloon change your repayments.

Every example below uses the same truck so you can compare like with like. Use the calculator in the next section to test your own numbers as you read.

Try the Truck Loan Calculator

Truck Finance Calculator

Truck price ($) Deposit or trade-in ($) Interest rate (% p.a.) Term (months) Balloon (% of amount financed) Repayment frequency

Estimated repayment

Estimates only. Not an offer, quote or approval. Excludes fees and GST. Actual rate and repayments are set by the lender and subject to approval.

Enter the truck price, your deposit, an interest rate, the term and any balloon. The calculator returns your repayment per week, fortnight or month, plus the total interest over the loan. The results are estimates only. Your actual rate and repayment depend on the lender, your business profile and the truck.

What a Truck Loan Repayment Calculator Actually Works Out

A truck repayment calculator takes the amount you borrow, spreads it over your chosen term and adds interest. Each repayment covers two things: interest on what you still owe, and a slice of the amount borrowed. Early repayments are mostly interest. Later repayments are mostly principal.

Most truck loans in Australia are set up as a chattel mortgage. You own the truck from day one and the lender holds it as security. If you want a refresher on the structure, our guide to truck and commercial vehicle finance on the Gold Coast covers chattel mortgages and finance leases in more detail.

Four inputs drive every result:

Amount financed: the truck price minus your deposit or trade-in.
Interest rate: set by the lender, based on your business, the truck and the loan structure.
Loan term: usually 12 to 84 months for commercial vehicles.
Balloon (residual): an optional lump sum left owing at the end of the term.

How to Calculate Truck Loan Repayments by Hand

You do not need a spreadsheet, but it helps to know what sits behind the calculator. For a loan with no balloon, the monthly repayment is:

Repayment = P × i ÷ (1 − (1 + i)^−n)

P is the amount financed
i is the monthly interest rate (the annual rate divided by 12)
n is the number of monthly repayments

For a balloon loan, replace P with P minus the balloon divided by (1 + i)^n. That reduces the amount the repayments need to clear, which is why the repayment drops.

Here is the first month on a $120,000 loan at 8.5% p.a. The monthly rate is 0.708%, so month one interest is $850.00. With a repayment of $2,461.98, the other $1,611.98 reduces the loan balance. After three months the balance has fallen from $120,000 to about $115,130.

Worked Examples: Deposit, Term, Rate and Balloon

All examples assume a $150,000 truck (excluding GST), an indicative rate of 8.5% p.a. and monthly repayments in arrears, unless stated. The 8.5% rate is a round number for comparison and is not a Millard rate or offer.

Example 1: No deposit, 60 months

You finance the full $150,000 over five years.

Monthly repayment: $3,077.48
Total repaid: $184,648.78
Total interest: $34,648.78

Example 2: $30,000 deposit, 60 months

A 20% deposit cuts the amount financed to $120,000.

Monthly repayment: $2,461.98
Total repaid: $147,719.03
Total interest: $27,719.03

Compared with Example 1, the deposit saves $615.50 a month and about $6,930 in interest over the term. If you prefer to pay weekly, that works out to roughly $567 a week.

Example 3: $30,000 deposit and a 30% balloon

Same $120,000 loan, but 30% of it ($36,000) is left as a balloon at the end of the term.

Monthly repayment: $1,978.39
Balloon owing at the end of month 60: $36,000
Total paid including the balloon: $154,703.32
Total interest: $34,703.32

The balloon drops your monthly repayment by about $483.60 compared with Example 2. The trade-off is roughly $6,984 more interest and a $36,000 payment to find at the end. You can pay it out, refinance it or trade the truck in, so it helps to plan that early.

Example 4: How loan term changes repayments

Same $120,000 loan at 8.5%, no balloon, three different terms:

Term	Monthly repayment	Total interest
48 months	$2,957.80	$21,974.23
60 months	$2,461.98	$27,719.03
84 months	$1,900.38	$39,631.77

Stretching from 48 to 84 months lowers the repayment by $1,057.42 a month but adds about $17,658 in interest. A longer term is a cash flow tool, not a saving.

Example 5: How the interest rate changes repayments

Same $120,000 loan, 60 months, no balloon:

Interest rate	Monthly repayment	Total interest
7.5%	$2,404.55	$24,273.23
8.5%	$2,461.98	$27,719.03
9.5%	$2,520.22	$31,213.40

A two percentage point gap is only about $116 a month, yet it adds up to roughly $6,940 over five years. Rate matters, but on its own it moves your repayment less than term or balloon do.

What the Truck Finance Calculator Does Not Include

A calculator gives you the repayment on the loan itself. Your lender’s actual offer can also include:

Establishment and account fees, which are sometimes added to the amount financed
GST treatment, which depends on your structure and registration (your accountant can confirm how it applies)
Rate differences by truck age, deposit size and time in business
Different repayment timing, such as payments in advance, which changes the figure slightly

Treat any online result as a planning figure. A broker can turn it into a real number by comparing lenders against your situation.

Five Ways to Lower Your Truck Repayments

Put down a deposit or trade in an older truck. Example 2 shows what a 20% deposit does.
Choose a term that fits your freight contracts. Match the loan to how long you plan to run the truck.
Use a balloon carefully. It protects cash flow now but leaves a lump sum later.
Show strong business records. Recent BAS statements and bank statements can help you access better terms.
Compare lenders through a broker. Lenders price trucks and operators differently, so one bank’s view is rarely the full picture. Our guide on commercial finance brokers explains how that works.

Tax Matters to Check Before You Commit

Repayments are only part of the cost of a truck. Depreciation, interest deductions and GST can all affect what the truck really costs your business. The ATO explains how the instant asset write-off and the simplified depreciation rules work for small businesses. Because a prime mover or rigid usually costs well above the per-asset limit, speak with your accountant about how the truck would be treated. We also cover related timing considerations in our post on the instant asset write-off and EOFY.

To cross-check your maths on a loan without a balloon, ASIC’s MoneySmart site has a loan repayment calculator. It is built for principal and interest loans, so it will not model a balloon.

Truck Finance for Different Operators

Your repayment target depends on how you run the truck.

New owner-operators: a larger deposit often gives you more lender options. See our start-up business loans for newer ABNs.
Growing fleets: structuring several trucks under one arrangement can simplify repayments. Our asset finance team can walk you through the options.
Tipper and heavy haulage operators: if you also run earthmoving gear, see our heavy equipment finance page.
Trailers: most truck businesses finance a trailer too. Read our guide to trailer finance for transport and trade businesses.
Tight cash flow between contracts: a cash flow lending facility can sit alongside your truck loan.

Rate movements also change your numbers. Our article on how interest rates affect business finance decisions explains what to watch.

Truck Finance Across the Gold Coast and South East Queensland

We arrange truck finance for operators across the Gold Coast, Brisbane and northern NSW. Local pages to explore:

Frequently Asked Questions

How do I calculate monthly repayments on a truck loan?
Divide the amount financed over your term using the repayment formula above, or enter the price, deposit, rate, term and balloon into the calculator. Each repayment covers interest and some of the principal.

What is a typical truck loan term in Australia?
Terms commonly run from one to seven years. Lenders consider the truck’s age at the end of the term, so used trucks may suit shorter terms.

Does a balloon make a truck loan cheaper?
It lowers your regular repayment, but you usually pay more interest overall because the balloon balance keeps accruing interest. Example 3 shows the trade-off.

Does using a truck finance calculator affect my credit score?
No. An online calculator does not check your credit. A credit check only happens when a lender formally assesses an application, with your consent.

Is a truck loan calculator result the same as my approved repayment?
Not exactly. Your lender sets the rate and fees, and may assess your business differently. Treat the calculator as a guide.

How much deposit do I need for truck finance?
It varies by lender, truck and business profile. Some established operators access low or no deposit options, while newer businesses may be asked for more.

Get Your Real Truck Repayment Figure

A calculator tells you roughly where you stand. A broker can tell you what is actually available. At Millard Financial we compare lenders from our panel, structure the deposit, term and balloon around your cash flow, and explain every figure before you decide.

Contact our team today or visit our truck and commercial vehicle finance page to discuss your next truck.

This article is general information only and does not consider your personal circumstances. Calculator results are estimates and are not an offer, quote or approval. Your full financial situation would need to be reviewed before acceptance of any offer or product. Check tax and GST treatment with your accountant.

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