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IRD Depreciation Rate Finder

IRD depreciation rate finder for NZ business assets. Diminishing value (DV) and straight-line (SL) methods. Vehicles, computers, equipment, plant. FY 2026-27.

By Konstantin IakovlevPublished 28 March 2026Last reviewed
Data stays on your deviceIRD sourced data

About this calculator

This calculator implements IRD depreciation rates (DV/SL methods) from Inland Revenue (IRD). Last consulted 25 March 2026. Verify the figures yourself by following the link.

Common NZ IRD depreciation rates

FY 2026-27 (IRD General DV table)
  • Computers, laptops, tablets: 50% DV / 40% SL
  • Office furniture: 10-13% DV
  • Motor vehicles (cars): 30% DV / 21% SL
  • Smartphones: 60% DV
  • Software (off-shelf): 50% DV / 40% SL
  • Buildings (residential): 0% (no longer depreciable, since 2011)
  • Buildings (commercial): 2% DV / 1.5% SL

Source: IRD — Depreciation

Disclaimer

This calculator provides estimates for general information purposes only. Results should not be relied upon as professional financial, tax, or legal advice. Tax rates and thresholds are based on publicly available IRD data and may change. Always consult a qualified tax agent or financial adviser for advice specific to your circumstances.

How NZ depreciation is calculated

Businesses depreciate fixed assets over their useful life using rates IRD publishes. Reduces taxable profit. Two methods: Diminishing Value (DV) or Straight Line (SL).

  1. 1

    Find IRD asset rate

    Each asset class has a specified DV rate (e.g. Computer: 50% DV / 40% SL)

    IRD publishes the General DV table — search by industry/asset.

  2. 2

    Diminishing Value (DV)

    Year_1_depreciation = cost × DV_rate  |  Year_N = book_value × DV_rate

    Bigger deduction in early years. Most common.

  3. 3

    Straight Line (SL)

    Annual_depreciation = (cost − residual) ÷ useful_life

    Equal each year. Used for some classes like buildings.

  4. 4

    Calculate tax saving

    Tax_saving = depreciation × your_tax_rate (28% company / personal marginal)

    Depreciation reduces taxable income — doesn't put cash in pocket immediately.

Worked example

Inputs: $10,000 laptop, 50% DV, company tax 28%

Result: Y1 dep $5,000 → tax saving $1,400. Y2 dep $2,500 → saving $700.

Frequently Asked Questions

How does IRD depreciation work for NZ businesses?
IRD depreciation allows New Zealand businesses to deduct the cost of business assets over their useful life, reducing taxable income each year. When you buy a business asset — such as equipment, vehicles, or furniture — you cannot deduct the full cost immediately (unless it qualifies for the low-value write-off). Instead, you claim a depreciation deduction each year based on the IRD-published depreciation rate for that asset type. IRD publishes a comprehensive list of asset types with approved economic depreciation rates, accessible through their depreciation rate finder tool online. The depreciation you claim reduces the asset's tax book value (adjusted tax value) over time. When you eventually sell the asset, the difference between the sale price and the book value may result in either depreciation recovered (taxable) or a loss on sale (deductible). Depreciation helps match the expense of an asset to the income it generates. Source: IRD — Depreciation (ird.govt.nz/income-tax/business/depreciation).
What is the difference between diminishing value (DV) and straight-line (SL) depreciation?
New Zealand businesses can choose between two main depreciation methods: diminishing value (DV) and straight-line (SL). Under the diminishing value method, the depreciation rate is applied to the asset's remaining book value (tax value) each year. This means you claim more depreciation in the early years and less in later years, because the base keeps reducing. DV front-loads deductions and is often preferred for cash flow reasons. Under the straight-line method, you depreciate a fixed percentage of the original cost each year, giving equal annual deductions throughout the asset's life. For example, a $10,000 asset at 20% SL gives $2,000 per year for 5 years. The same asset at 30% DV would give $3,000 in year 1, $2,100 in year 2, and so on. IRD publishes both DV and SL rates for each asset type. Once you choose a method for an asset, you generally must stick with it. Source: IRD — Depreciation Methods (ird.govt.nz/income-tax/business/depreciation).
Can I depreciate buildings in New Zealand?
The depreciation rules for buildings in New Zealand changed significantly in the 2020 Budget. Non-residential buildings (such as commercial premises, warehouses, and offices) can be depreciated at 2% per annum using the straight-line method, reinstated from the 2020-21 tax year after having been removed in 2012. Residential rental property buildings cannot be depreciated — the depreciation rate for residential buildings is 0% — a rule that has been in place since 2011 and was retained in the 2020 Budget. Land is never depreciable under any circumstances. Fit-out and fixtures within a building (such as carpet, air conditioning, or security systems) are typically treated as separate assets with their own depreciation rates. The building's structure (walls, roof, floor) is what is subject to the building depreciation rules; chattels inside can be depreciated separately. Source: IRD — Depreciation of Buildings (ird.govt.nz/income-tax/business/depreciation).
What is the low-value asset write-off threshold in NZ?
In New Zealand, assets that cost $1,000 or less (excluding GST if GST-registered) can be fully deducted as an expense in the year of purchase, rather than being depreciated over time. This low-value asset write-off threshold was increased from $500 to $1,000 on 17 March 2020, as part of the COVID-19 Business Continuity Package, and remains at $1,000 for the 2026-27 year. A temporary higher threshold of $5,000 applied for assets purchased between 17 March 2020 and 16 March 2021 only. If an asset costs more than $1,000, you must depreciate it at the relevant IRD rate over its useful life. The threshold applies to individual assets — you cannot split a single item into components to get under the $1,000 limit. However, if you buy several separate items of similar type, each item is assessed individually against the threshold. Source: IRD — Low-Value Asset Write-Off (ird.govt.nz/income-tax/business/depreciation).

NZ tax depreciation reduces the taxable value of business assets over their useful life. IRD sets depreciation rates for different asset types. You can use the diminishing value (DV) method or the straight-line (SL) method.

How this calculator works

DV method: depreciation = opening tax value × DV rate. SL method: depreciation = cost × SL rate, claimed evenly each year. Low-value assets under $1,000 can be written off immediately. The rate depends on asset type and estimated useful life.

NZ Depreciation Key Rules

Low-value asset threshold$1,000 — immediate write-off in year of purchase
Computers (DV rate)50% per year
Motor vehicles (DV rate)30% per year
Office furniture (DV rate)18% per year
Residential buildings0% (no depreciation allowed since 2011)

Depreciation is recovered (taxable) on disposal if the asset is sold above its tax book value.

Worked Examples

Vehicle cost $30,000, DV rate 30%

Year 1 depreciation $9,000 (tax value $21,000). Year 2 depreciation $6,300 (tax value $14,700).

  1. Year 1: opening value $30,000 × 30% = $9,000 depreciation
  2. Year 1 closing tax value: $30,000 − $9,000 = $21,000
  3. Year 2: opening value $21,000 × 30% = $6,300 depreciation
  4. Year 2 closing tax value: $21,000 − $6,300 = $14,700
  5. Depreciation is deducted from taxable income each year

Laptop cost $2,500, SL rate 40%

Annual depreciation claim $1,000/year over 2.5 years.

  1. Laptop cost: $2,500 (above $1,000 low-value threshold)
  2. SL rate: 40% per year
  3. Annual depreciation: $2,500 × 40% = $1,000
  4. Claimed evenly: $1,000 in Year 1, $1,000 in Year 2, $500 in Year 3
  5. Total depreciation: $2,500 over the asset's life

Built and maintained by Konstantin Iakovlev. Data sourced from the IRD and official New Zealand government sources.

Last reviewed: