Back to reviews

Chattel Mortgage vs Consumer Loan — What WA Car Buyers Need to Know

If you have an ABN, choosing the wrong finance product can cost you thousands. Here's how to get it right.

AutoReady WA Editorial·5 min read·22 May 2026

Two Finance Products, Two Very Different Tax Outcomes

When most WA buyers think about car finance, they think about interest rates. But if you hold an ABN — as a sole trader, a small business owner, or a company — the *type* of finance product you choose can have a far bigger financial impact than the interest rate alone. Getting this decision wrong can mean losing thousands of dollars in legitimate tax deductions.

This is not tax advice — speak to your accountant about your specific situation. But this guide will give you the framework to have that conversation intelligently.

---

What Is a Consumer Loan?

A consumer loan (also called a personal car loan) is the straightforward product: the lender gives you money, you buy a car, you repay the loan in monthly instalments including interest.

**Who it's for:** Private buyers purchasing a vehicle primarily for personal use.

**Key features:** - The vehicle is registered in your personal name - National Consumer Credit Protection (NCCP) Act applies — you have consumer protections - Interest is generally *not* tax deductible (because it's personal use) - GST on the purchase is not claimable through your BAS - Simple approval process — assessed on personal income and credit history

**When it makes sense:** You're buying a car for personal driving, you don't have an ABN, or the vehicle won't be used in a business context.

---

What Is a Chattel Mortgage?

A chattel mortgage is a business finance product. You own the vehicle from day one (the "chattel"), and the lender takes a mortgage over it as security. When the loan is repaid, the mortgage is discharged.

**Who it's for:** ABN holders — sole traders, companies, trusts — purchasing a vehicle for business use.

**Key features:** - NCCP consumer protections do *not* apply (it's a commercial product) - **GST on the purchase price can be claimed on your next BAS** — on a $74,990 vehicle, that's up to $6,817 back - **Interest charges are generally tax deductible** (for the business-use portion) - **Depreciation on the vehicle** may be claimable under instant asset write-off rules - Balloon payment option: a lump sum at loan end reduces monthly payments

**When it makes sense:** You have an ABN, the vehicle will be used at least partly for business, and you're registered for GST.

---

Real-World Example: HiLux SR5 for a WA Tradie

Let's say you're a plumber in Perth buying a Toyota HiLux SR5 at $74,990 driveaway for your business.

**Consumer loan scenario:** - Loan amount: $59,992 (after 20% deposit) - Rate: 5.66% p.a., 60 months - Monthly payment: ~$1,143 - Total interest paid: ~$8,593 - Tax deductibility: minimal (personal use assumed) - GST refund: none

**Chattel mortgage scenario:** - GST claim on BAS: approximately **$6,817 back** in your first quarter - Loan amount on GST-exclusive price: ~$54,539 - Rate: similar (commercial rates vary by lender and business profile) - Monthly payment: lower due to reduced principal - Interest: tax deductible (business-use portion) - Depreciation: potentially claimable under ATO instant asset write-off (check current thresholds with your accountant)

**The GST refund alone** — $6,817 — is often the most significant financial benefit, immediate and guaranteed (if you're GST registered).

---

The Business-Use Percentage Rule

The ATO requires that you can only claim the business-use portion of finance costs and depreciation. If you use the HiLux 80% for work and 20% personally, you can claim 80% of the interest and 80% of the depreciation.

You must keep records — a logbook for at least 12 continuous weeks — to substantiate your business-use percentage. This is not optional; the ATO audits vehicle claims regularly.

---

Balloon Payments: Useful Tool or Cash Flow Trap?

Chattel mortgages often include a **balloon payment** — a larger lump sum at the end of the loan term (typically 20–30% of the vehicle price). This reduces your monthly payments but means you owe a chunk at the end.

**Balloon example:** $74,990 HiLux, 30% balloon ($22,497), 60-month chattel mortgage at 5.8% p.a.: - Monthly payment: approximately $860 (vs $1,143 without balloon) - Balloon due at 60 months: $22,497

The balloon must be refinanced, paid in cash, or covered by trading the vehicle in. If residual values have dropped (HiLux typically holds well), you may owe more than the trade value — plan accordingly.

---

Quick Decision Guide

| Your Situation | Recommended Product | |---|---| | Private buyer, no ABN | Consumer loan | | ABN holder, GST registered, business use | Chattel mortgage | | ABN holder, primarily personal use | Consumer loan (simpler, protected) | | Company or trust purchasing fleet | Chattel mortgage or finance lease | | Unsure of business-use % | Talk to your accountant first |

---

What AutoReady WA's Finance Process Covers

When you apply for finance through AutoReady WA, you'll indicate whether you need a consumer or commercial product. Our lending panel includes lenders specialising in both — with competitive rates across both product types. We'll match you to the appropriate product category, but the final decision on which structure is most tax-effective for your situation should always involve your accountant.

[Get a finance pre-approval on AutoReady WA →](/finance)