Business EV Tax Deductions 2026: GST, Depreciation & Write-Offs

Financing an EV through your business can unlock an immediate GST refund on the purchase price, plus depreciation, interest and running-cost deductions that together can reduce your effective cost by 30-50%. This comprehensive guide explains every tax deduction available, how to claim them correctly, and the records you need to keep to maximise your business EV tax benefits.

EV tax deduction overview

When you finance or purchase an electric vehicle through your business, you can access multiple tax deductions that significantly reduce the true cost. These deductions are available to sole traders, partnerships, companies, and trusts that use EVs for business purposes.

The main tax deductions available are:

• GST Input Tax Credit: Claim back the GST component of the purchase price or lease payments
• Depreciation: Deduct the decline in value of the vehicle each year
• Interest Expenses: Claim the interest portion of finance repayments
• Running Costs: Deduct electricity, insurance, registration, servicing, and other operating expenses
• Instant Asset Write-Off: Potentially deduct the full cost immediately (subject to eligibility and thresholds)

These deductions work together to reduce your after-tax cost. The GST component is claimed back as cash; depreciation, interest and running-cost deductions instead reduce your taxable income, so their cash value is the deduction amount multiplied by your tax rate, not the deduction amount itself. For a business with a 30% tax rate purchasing a $70,000 EV with typical business use, combined first-year GST refund and tax savings are commonly in the order of $12,000 (see the worked example below for a full breakdown).

Eligibility requirements

To claim EV tax deductions, you must:

• Have an ABN and operate a business
• Use the vehicle for business purposes (partial business use is acceptable)
• Purchase or finance the EV through your business name
• Maintain appropriate records (logbooks, receipts, invoices)
• Lodge tax returns and BAS statements correctly

GST claims on electric vehicles

If your business is registered for GST, you can claim back the GST component of your EV purchase or lease payments.

GST on chattel mortgage or purchase

When you purchase an EV through a chattel mortgage or outright purchase, you can claim the full GST amount in your next Business Activity Statement (BAS).

How it works:

• The supplier charges GST on the sale price
• You receive a tax invoice showing the GST amount
• You claim this as an input tax credit in your next BAS
• The ATO typically processes electronically lodged BAS refunds within around two weeks, though this isn't guaranteed and can take longer if your BAS is selected for review

Important: the GST you can claim is capped at 1/11th of the car limit for the relevant financial year (see Car cost limit below), regardless of the vehicle's actual purchase price. For 2026-27 that cap is $6,353. A $70,000 vehicle in this example would exceed the 2026-27 car limit of $69,883, so the claimable GST would be capped at $6,353 rather than the full $6,364 shown above.

GST on finance leases

With a finance lease, you claim GST progressively on each lease payment rather than upfront.

How it works:

• Each lease payment includes a GST component
• You claim this GST as an input tax credit in the BAS period when you make the payment
• Over the lease term, you recover the same total GST as with a purchase

Example: Monthly lease payment of $1,100 (inc GST) = $100 GST claimable each month

GST registration requirements

To claim GST, your business must be:

• Registered for GST with the ATO
• Lodging regular BAS statements
• Holding valid tax invoices showing GST

If you're not currently GST registered but your turnover is approaching $75,000, consider registering before purchasing your EV to access these benefits.

Depreciation deductions

Depreciation (also called capital allowance) lets you claim a tax deduction for the decline in value of your EV over time.

Depreciation methods

You can choose between two ATO-approved depreciation methods:

1. Diminishing value method (200% declining balance)

This method provides higher deductions in early years, which most businesses prefer for better cash flow.

How it works:

• Year 1: 200% × effective life rate × cost
• Subsequent years: 200% × effective life rate × (previous year's value)
• Deductions decline each year as the base value reduces

Effective life: The ATO sets effective life for passenger vehicles at 8 years (12.5% prime cost rate)

Calculation: 200% ÷ 8 years = 25% diminishing value rate

2. Prime cost method (straight-line)

This method provides equal deductions each year.

How it works:

• Same deduction amount each year
• Calculate: Cost ÷ effective life (years)
• Using 8 year effective life = 12.5% per year

Example: $63,636 ÷ 8 years = $7,955 per year for 8 years

Car cost limit

The ATO sets a maximum depreciation limit for passenger vehicles (the car limit). For the 2026-27 financial year this is $69,883 (up from $69,674 in 2024-25). The ATO updates this figure each financial year, so confirm the current-year limit before relying on it.

If your EV costs more than this, you can only depreciate up to the limit. However, many popular business EVs fall under this threshold:

• Tesla Model 3 RWD: ~$64,000
• BYD Atto 3: ~$48,000
• MG ZS EV: ~$46,000
• Tesla Model Y RWD: ~$69,000

Instant asset write-off

Small businesses (aggregated turnover under $10 million) may be eligible for instant asset write-off, allowing you to deduct the full cost in the year of purchase.

Current rules (check with ATO for latest):

• Available for eligible small businesses
• Subject to asset thresholds (which change regularly)
• Passenger vehicles are subject to the car cost limit
• Must be used or installed ready for use by 30 June

If eligible, you could claim up to the current-year car limit (see above) as an immediate deduction rather than depreciating over 8 years.

Important: Always check current ATO rules as instant asset write-off legislation changes frequently.

Interest expense deductions

If you finance your EV through a chattel mortgage or business loan, the interest component of your repayments is fully tax deductible.

How interest deductions work

Each loan repayment consists of principal and interest. The interest portion is a deductible business expense.

Finance lease deductions

With a finance lease, the entire lease payment (principal + interest combined) is tax deductible as a business expense. You don't separate interest from principal, the full payment is simply claimed as a lease expense.

This makes accounting simpler while delivering similar overall tax benefits.

Running cost deductions

All costs associated with operating your business EV are tax deductible based on business use percentage.

Deductible running costs include:

• Electricity/charging costs: Home charging and public charging fees
• Insurance: Comprehensive, third party, or any vehicle insurance
• Registration: Annual registration fees
• Servicing: Regular maintenance, brake fluid, cabin filters, etc.
• Tyres: Replacement tyres and wheel alignment
• Roadside assistance: RACQ, NRMA, or other membership fees
• Parking and tolls: When incurred for business purposes
• Car wash/detailing: Reasonable cleaning costs

Claiming methods

You have two methods to claim car expenses:

1. Logbook method (recommended)

Claim actual expenses based on the business use percentage established by a logbook.

Requirements:

• Maintain a logbook for at least 12 continuous weeks
• Record all vehicle trips showing: date, odometer start/end, kilometres travelled, purpose
• Calculate business use percentage
• Apply this percentage to all actual vehicle expenses
• Keep receipts for all expenses claimed
• Logbook valid for 5 years (then update)

Example: Logbook shows 75% business use. Your annual running costs are $3,500. You claim 75% × $3,500 = $2,625.

2. Cents per kilometre method

Claim up to 5,000 business kilometres at the ATO's cents-per-kilometre rate. This rate is set for each financial year - for 2026-27 it is 91 cents per km (up from 88 cents in 2025-26 and 85 cents in 2024-25) - check the current rate before calculating your claim.

Maximum claim for 2026-27: 5,000 km × $0.91 = $4,550 per year

This method is simple but usually results in lower deductions for most business vehicles. The logbook method typically provides larger claims.

Electricity cost claims

One unique aspect of EVs is claiming electricity costs. You can claim:

• Home charging: Calculate cost per charge (kWh used × electricity rate) and keep a log of charges
• Public charging: Keep receipts from charging networks
• Workplace charging: Generally no claim if employer provides free charging (unless reimbursed)

Typical costs: Tesla Model 3 uses ~15kWh/100km. At $0.28/kWh, that's $4.20 per 100km or ~$2,100/year for 50,000km.

Complete tax benefit example

Here's what all these deductions add up to for a business purchasing a $70,000 Tesla Model 3.

Scenario: $70,000 Tesla Model 3 (Chattel Mortgage)

Business details:

• ABN registered business
• GST registered
• Company tax rate: 30%
• Business use: 75%
• Finance: Chattel mortgage, 7.5% p.a., 5 years, 30% balloon

This purchase price exceeds the 2026-27 car limit of $69,883, so the GST and depreciation claims below are calculated on the capped amount rather than the full $70,000.

Year 1 tax benefits:

1. GST Refund (immediate):

• Purchase price: $70,000 (inc GST)
• GST refund: capped at $6,353 (1/11th of the $69,883 car limit)
• Cash benefit: $6,353

2. Depreciation Deduction:

• Ex-GST cost base (capped): $63,530
• Diminishing value (25%): $15,883
• Business use (75%): $15,883 × 75% = $11,912
• Tax saving: $11,912 × 30% = $3,574
• Tax benefit: $3,574

3. Interest Expense Deduction:

• Year 1 interest: ~$5,075
• Business use (75%): $5,075 × 75% = $3,806
• Tax saving: $3,806 × 30% = $1,142
• Tax benefit: $1,142

4. Running Costs Deduction:

• Electricity: $2,100
• Insurance: $1,400
• Registration: $800
• Servicing: $400
• Total: $4,700
• Business use (75%): $4,700 × 75% = $3,525
• Tax saving: $3,525 × 30% = $1,058
• Tax benefit: $1,058

Total year 1 tax benefits:

GST Refund	$6,353
Depreciation Tax Saving	$3,574
Interest Tax Saving	$1,142
Running Costs Tax Saving	$1,058
TOTAL YEAR 1 BENEFIT	$12,127

Effective first year cost: $16,800 (repayments) - $12,127 (tax benefits) = $4,673

Over 5 years, total tax benefits would exceed $30,000, reducing the effective cost of the $70,000 EV to around $45,000 after all tax savings.

These numbers are based on a $70,000 EV at 7.5% p.a. over 5 years. Use our loan repayment calculator to run the finance side with your own vehicle price, rate and term before you talk to a broker.

Record keeping requirements

To claim EV tax deductions, you must maintain comprehensive records for at least 5 years.

Essential records to keep:

Purchase and finance documents:

• Vehicle purchase invoice showing GST breakdown
• Chattel mortgage or lease agreement
• Proof of deposit payment
• Registration papers in business name

GST records:

• Tax invoice from dealer/supplier
• BAS lodgements showing GST claim
• Bank statements showing GST refund received

Depreciation records:

• Depreciation schedule showing calculations
• Asset register listing vehicle details
• Method chosen (diminishing value or prime cost)
• Effective life used (8 years for passenger vehicles)

Logbook (if using the logbook method):

• 12-week continuous logbook showing all trips
• Date, odometer start/end, km travelled, purpose for each trip
• Business use percentage calculation
• New logbook every 5 years or if circumstances change significantly

Running cost records:

• Receipts for all charging/electricity costs
• Insurance premium invoices
• Registration renewal notices
• Servicing and maintenance receipts
• Tyre purchase receipts
• Any other vehicle-related expenses

Finance records:

• Loan or lease statements showing repayments
• Annual interest summary from lender
• Evidence of balloon payment (if applicable)

Digital record keeping

The ATO accepts digital records. Consider using:

• Cloud accounting software (Xero, MYOB, QuickBooks) for expense tracking
• Digital logbook apps approved by ATO
• Receipt scanning apps for storing expense receipts
• Spreadsheets for manual tracking if preferred

What happens if records are inadequate?

If audited by the ATO and you cannot substantiate your claims:

• Deductions may be disallowed
• You may need to repay tax savings received
• Penalties and interest may apply
• Future claims may be scrutinised more closely

Keep detailed, accurate records from day one to protect your deductions.

Frequently asked questions

Can I claim GST on an electric vehicle purchase?

Yes, if your business is registered for GST, you can claim the GST component of an EV purchase. For a chattel mortgage, you claim it upfront in your next BAS. For a lease, you claim it progressively on each payment. This provides an immediate 1/11th (9.09%) refund of the GST-inclusive price.

How much depreciation can I claim on a business EV?

EVs can be depreciated using either diminishing value (200% declining balance) or prime cost (straight-line) methods. Typically, first year depreciation is 25-30% under diminishing value or 20% under prime cost. Small businesses may qualify for instant asset write-off if eligible.

Are EV running costs tax deductible?

Yes, all business EV running costs are tax deductible based on business use percentage. This includes electricity/charging costs, insurance, registration, servicing, tyres, and roadside assistance. Keep detailed records and logbooks to substantiate claims.

Can I claim interest on an EV loan as a tax deduction?

Yes, interest paid on business vehicle finance is fully tax deductible. For a chattel mortgage, you claim the interest component of each repayment. For a lease, the entire lease payment (including interest) is deductible as a business expense.

What is the instant asset write-off for electric vehicles?

Small businesses (aggregated turnover under $10 million) may be able to instantly deduct the cost of eligible assets. However, passenger vehicles are subject to the car limit ($69,883 for 2026-27, updated annually by the ATO). Check current ATO guidelines and the current-year car limit as instant asset write-off rules change regularly.

Do I need a logbook to claim EV tax deductions?

If claiming the logbook method (recommended for most businesses), you must maintain a logbook for at least 12 continuous weeks showing all vehicle use. This establishes your business use percentage which you can apply for up to 5 years before updating. Keep records of all expenses.

What records do I need to keep for EV tax deductions?

Keep: vehicle purchase invoice showing GST, finance agreements, logbook records, receipts for all running costs (electricity, servicing, insurance, etc), depreciation schedules, and BAS lodgements showing GST claims. Retain records for 5 years after claiming.

Conclusion

Australian businesses get real tax advantages on electric vehicles. Claiming GST refunds, depreciation deductions, interest expenses, and running costs correctly can reduce your effective EV cost by 30-50% compared to the purchase price.

Getting the structure right from the start matters. Choose the right finance type (chattel mortgage or lease) based on your tax situation, keep thorough records, and work with an accountant who understands business vehicle tax deductions.

If you are also weighing up trucks or machinery for the business, Digger's Marketplace lists trucks, farm equipment and machinery from accredited Australian suppliers.

Tax laws change regularly, so this guide is a starting point, not a substitute for advice. Always check with a qualified accountant or tax adviser for your specific circumstances.