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.
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
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
Diminishing Value (DV)
Year_1_depreciation = cost × DV_rate | Year_N = book_value × DV_rate
Bigger deduction in early years. Most common.
- 3
Straight Line (SL)
Annual_depreciation = (cost − residual) ÷ useful_life
Equal each year. Used for some classes like buildings.
- 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?
What is the difference between diminishing value (DV) and straight-line (SL) depreciation?
Can I depreciate buildings in New Zealand?
What is the low-value asset write-off threshold in NZ?
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 buildings | 0% (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).
- Year 1: opening value $30,000 × 30% = $9,000 depreciation
- Year 1 closing tax value: $30,000 − $9,000 = $21,000
- Year 2: opening value $21,000 × 30% = $6,300 depreciation
- Year 2 closing tax value: $21,000 − $6,300 = $14,700
- 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.
- Laptop cost: $2,500 (above $1,000 low-value threshold)
- SL rate: 40% per year
- Annual depreciation: $2,500 × 40% = $1,000
- Claimed evenly: $1,000 in Year 1, $1,000 in Year 2, $500 in Year 3
- 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: