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Free NZ mileage calculator. Vehicle expense claim using IRD kilometre rates, tier one for the first 14,000 km then tier two.

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Vehicle expense claim on IRD km rates.

Vehicle expense claim

Business km

Tier 1 / tier 2 split

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The kilometre rate method, in plain terms

Inland Revenue gives sole traders and close companies two ways to claim the cost of running a vehicle for work. You can keep every fuel receipt, service invoice, insurance bill and depreciation schedule, then apportion the lot by business use. Or you can use the kilometre rate method, which rolls all of those costs into a single cents-per-kilometre figure that IRD publishes each year. This tool runs the second method. For most people who drive a personal car for occasional business trips, the kilometre rate is far less painful at year end, and it usually lands within a few hundred dollars of the receipt method anyway.

The rates come in two tiers. Tier one is the higher rate because it is meant to cover both the running costs and a slice of the fixed costs of owning the vehicle, such as depreciation and insurance. It applies to the first 14,000 kilometres of travel. Tier two is lower, covering running costs only, and it applies to everything above that. The figures baked into this calculator are $1.04 per kilometre for tier one and $0.35 per kilometre for tier two. IRD resets these annually, often after the petrol price moves, so check the current published rates before you file.

A 20,000 km year split across both tiers

Here is the catch that trips people up. The 14,000 kilometre cap is measured against your total travel for the year, not your business kilometres. You work out the tier split on the whole odometer reading, then apply your business-use share to each tier. Say you drove 20,000 km in total and 60 percent of that was for work. The first 14,000 km sits in tier one and the remaining 6,000 km in tier two. Your business share of each is what you actually claim.

The bulk of the claim, $8,736 of the $9,996, comes from tier one. That is why the first 14,000 km matter so much and why high-mileage drivers see their average rate per kilometre fall as more of their travel slides into tier two.

Who should use this, and the logbook you still need

This method suits a contractor, freelancer or one-person company who uses a private car for work runs and does not want to track every cost. It does not suit someone whose vehicle is close to fully business, where the receipt method on a fleet of high running costs can beat the capped rate. A common mistake is thinking the kilometre rate frees you from records. It does not. You still need a logbook or a defensible record of business travel to support the business-use percentage, and IRD can ask for it. A 90-day representative logbook can be used to set a percentage you then apply for up to three years, which is the practical way most people handle it.

One judgement call worth flagging: the kilometre rate method caps out. You can only claim up to a set number of business kilometres under this method in a year, after which you must switch to actual costs. If you are doing serious mileage, model both methods before you commit, because once you pick the kilometre rate for a vehicle you generally stay with it while you own that vehicle.

Can I claim mileage if I am an employee, not self-employed?

The kilometre rate method is for self-employed people and close companies claiming a deduction. As an employee you do not claim it on a tax return. Instead your employer can reimburse you tax-free for work travel, and many use the IRD rates as a reasonable benchmark for that reimbursement. Travel between home and your normal workplace is private and is not claimable either way.

Does the claim reduce my tax or my income?

It reduces your taxable income. The $9,996 in the example is a deduction against your business profit, so the actual tax you save is that figure multiplied by your marginal rate. At the 30 percent rate that is a little under $3,000 off your tax bill, not the full $9,996.

Frequently asked questions

How do IRD kilometre rates work?
The kilometre rate method lets a sole trader or close company claim vehicle costs without keeping every receipt. Tier one (a higher rate) applies to the first 14,000 km of total travel in the year, then tier two applies to business kilometres above that. You apply the rates to your business-use proportion. Rates are set by IRD each year, so confirm the current figures.
Do I need a logbook to use the kilometre rate method?
Yes. IRD still requires a record of business travel to support the business-use percentage you apply. A 90-day representative logbook is the standard approach. Once you have an established percentage from a valid logbook, you can apply it for up to three years before you need to do another 90-day record. Without a logbook, the business-use percentage is not defensible in an audit.
Can my employer reimburse me at the IRD kilometre rate?
Yes. Employers can reimburse employees for work-related travel using the IRD rates and the reimbursement is treated as tax-free for the employee up to the published rate. Travel between home and a permanent workplace is private travel and cannot be reimbursed tax-free. The employee claim method is separate from the self-employed deduction method this calculator covers.
How does the kilometre rate method interact with KiwiSaver?
Vehicle expense deductions reduce your taxable income, which reduces your net income for the year. If you are self-employed, your KiwiSaver contributions are based on your own choices rather than being tied to a salary, so the reduction in taxable income does not automatically change your KiwiSaver position. However, a lower net income does affect your eligibility for the member tax credit: you need to earn at least $34,762 per year to receive the maximum $521 government contribution, so a large vehicle deduction could push you below that threshold.

Related calculators

Sources

  1. Inland Revenue — Individual Income Tax Rates, Inland Revenue Department (Te Tari Taake), New Zealand
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