Claiming Vehicle Expenses Guide - Logbook vs Kilometre Rates

🚗 Claiming a Vehicle for Business

If you use a vehicle for work as a sole trader, contractor or business owner, you can claim the business portion of its costs against your income, reducing your tax. But you cannot just claim the whole car: you have to separate business use from private use, and choose a method for working out the deduction. This guide explains the two main methods, the logbook (actual costs) method and the kilometre rate method, and how to decide which fits you. It is about the principles; the exact rates change each year.

Master Framework: A vehicle used for both work and private trips can only be claimed for its business share. You first establish your business-use percentage, ideally with a logbook. Then you choose a method: the logbook (cost) method claims that percentage of your actual running and ownership costs (fuel, servicing, insurance, depreciation), while the kilometre rate method multiplies your business kilometres by IRD's set rate per kilometre, which already bundles all those costs together. The cost method can give a bigger deduction for expensive or heavily used vehicles; the kilometre method is simpler and avoids keeping every receipt. You cannot claim private travel, and home-to-work commuting is generally private.

Business Use vs Private Use

The starting point is that only business travel is deductible. Driving to meet a client, between job sites, or to buy materials is business. Driving the kids to school or to the supermarket is private. The ordinary commute from home to your main workplace is generally treated as private too. Getting this split right, and being able to show it, is the foundation of any vehicle claim.

Establishing the Split:

Keep a logbook for a representative period (commonly three months) recording business and private trips
That period sets your business-use percentage, which you can then apply for up to three years
Without a logbook, claims are limited, because you cannot prove the business share

📝 The Two Methods

The Logbook (Cost) Method

Under this method you add up the actual costs of running and owning the vehicle over the year, fuel, servicing, tyres, insurance, registration, and depreciation, then claim your business-use percentage of the total. It rewards careful record-keeping and can produce a large deduction for an expensive vehicle or one with high running costs, but it means keeping receipts and tracking everything.

Cost Method in Brief:

Track all vehicle running and ownership costs for the year
Apply your business-use percentage to the total
Include depreciation on the vehicle as part of the costs
Best where the vehicle is costly or used heavily for business

The Kilometre Rate Method

Under this method you simply record your business kilometres and multiply them by IRD's published rate per kilometre. That rate already includes an allowance for fuel, maintenance, depreciation and other costs, so you do not track them separately. There is a higher tier rate for the first chunk of kilometres each year and a lower rate beyond that, reflecting that fixed costs are spread over the early kilometres.

💡 Two Tiers in the Kilometre Rate

The kilometre rate has a higher Tier One rate for the first block of total kilometres in a year (covering fixed plus running costs) and a lower Tier Two rate beyond that (running costs only). This is because the fixed costs of owning a vehicle are largely covered by the first kilometres.

Employers Reimbursing Staff

The kilometre rates are also used by employers to reimburse employees tax-free for work use of their own vehicle. Paying at or below the IRD rate keeps the reimbursement free of tax. This is why the rates matter to employees as well as the self-employed.

🤔 Common Misunderstandings About Vehicle Claims

Misconception 1: "I can claim my whole car"

Reality: Only the business-use portion is deductible. Private travel, including your normal commute, cannot be claimed.

Misconception 2: "I do not need a logbook"

Reality: A logbook is how you prove your business-use percentage. Without one, your claim is limited and harder to defend if questioned.

Misconception 3: "The kilometre rate is always better"

Reality: The kilometre rate is simpler, but for an expensive or heavily used vehicle the cost method can give a larger deduction. It pays to compare.

Misconception 4: "Driving to work counts as business"

Reality: Home-to-work commuting is generally private. Business travel is travel for the work itself, such as between sites or to clients.

Misconception 5: "I can switch methods freely every year"

Reality: There are rules about choosing and sticking with a method, and once you use the kilometre rate method for a vehicle you generally continue with it. Get advice before switching.

Misconception 6: "Employer reimbursements are taxable income"

Reality: Reimbursing an employee at or below the IRD kilometre rate for genuine work travel is tax-free; it is a reimbursement of a cost, not extra pay.

💡 Keep It Simple but Provable

Whichever method you pick, the keys are the same: keep a logbook to establish business use, keep enough records to back your claim, and never claim private travel. A tidy logbook is the foundation of a defensible vehicle claim.

🎯 Test Your Knowledge

Quiz on Claiming Vehicle Expenses

1. You can claim a vehicle for tax purposes:

Only for the business-use portion

In full, always

Only if it is brand new

Only if it is electric

2. Your business-use percentage is best established with:

A logbook over a representative period

A guess

Your bank statements

The car's colour

3. The logbook (cost) method claims:

Your business share of actual running and ownership costs

A flat fee

Only fuel

Nothing for depreciation

4. The kilometre rate method works by:

Multiplying business kilometres by IRD's set rate

Adding up every receipt

Claiming the purchase price

Ignoring distance

5. The kilometre rate has two tiers because:

Fixed costs are largely covered by the first block of km

IRD likes round numbers

Electric cars are different

It changes by region

6. Home-to-work commuting is generally:

Private travel, not claimable

Always business

Half business

Claimable if you take the long way

7. For an expensive, heavily used vehicle, the better method is often:

The cost (logbook) method

The kilometre rate, always

Neither

Claiming the whole car

8. Employers can reimburse staff tax-free for work travel by:

Paying at or below the IRD kilometre rate

Paying anything they like

Adding it to wages

Not recording it

9. Without a logbook, your vehicle claim is:

Limited and harder to defend

Larger

Automatic

Doubled

10. The kilometre rate already includes an allowance for:

Fuel, maintenance and depreciation

Only fuel

Nothing

Insurance only

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