Understanding Capital Allowances: How to Write Off Business Assets Against Tax

Accounting depreciation is strictly not tax-deductible in Singapore. Instead, the Inland Revenue Authority of Singapore (IRAS) requires businesses to claim capital allowances for the wear and tear of qualifying fixed assets purchased for business use. Properly structured capital allowance claims represent one of the most effective ways for profitable companies to reduce their assessable income during their tax computation and filing singapore process.

1. Qualifying “Plant and Machinery”

To claim capital allowances, the asset must legally qualify as “Plant and Machinery” under the Income Tax Act. IRAS applies strict tests to determine this:

  • Business Use Test: The asset must function as an apparatus used to carry on your business activities.
  • Premises Test: The asset cannot be part of the physical setting or structure of your business premises (e.g., permanent walls or built-in flooring).
  • Stock-in-Trade Exemption: Assets purchased for resale (inventory) are strictly excluded from capital allowances.

Qualifying assets typically include office equipment, specialized software, manufacturing machinery, and automation tools. Furthermore, commercial vehicles (such as vans, lorries, and Q-plate goods vehicles) fully qualify. Conversely, IRAS entirely prohibits capital allowance claims on private S-plate cars.

2. The 100% Write-Off (1-Year Claim)

Under Section 19A, IRAS allows SMEs to aggressively write off the entire cost of specific assets in a single Year of Assessment (YA). This 100% accelerated deduction applies to:

  • Computers and Automation: Laptops, specialized software, and prescribed automation equipment qualify for an immediate 100% write-off.
  • Low-Value Assets: Any individual asset costing $5,000 or less can be written off completely in one year. However, IRAS caps this low-value asset claim at $30,000 per YA. If you buy an asset for $5,001, it is excluded from this specific rule entirely.

3. The Accelerated 3-Year Write-Off

If an asset does not qualify for the 1-year write-off, most SMEs elect the accelerated 3-year write-off under Section 19A(1). Instead of claiming deductions over the asset’s long working life (which can take up to 16 years under standard Section 19), this election allows you to write off the asset’s cost in equal 33.3% installments over three consecutive years. This strategy rapidly frees up cash flow.

4. Balancing Allowances and Charges Upon Disposal

When you eventually sell or scrap an asset, you must reconcile the asset’s tax written down value (TWDV) with its sale proceeds.

  • If you sell the asset for less than its TWDV, you claim a balancing allowance, which acts as an additional tax deduction.
  • If you sell the asset for more than its TWDV, you incur a balancing charge. You must add this charge back into your taxable income, effectively returning the excess allowances you previously claimed.

Managing these calculations correctly is a critical component of professional corporate tax services singapore, ensuring your tax compliance singapore remains flawless during IRAS audits.

Your Final Checklist for Claiming Capital Allowances

Before submitting your corporate tax return, run through this quick checklist:

☑️ Asset Qualification: Do all claimed items pass the business use and premises tests?

☑️ Vehicle Exclusions: Have you strictly excluded all private S-plate cars from your capital allowance schedules?

☑️ Low-Value Asset Cap: Have you ensured your total claims for assets under $5,000 do not exceed the $30,000 annual limit?

☑️ Disposal Tracking: Have you accurately calculated the balancing charges for any written-off equipment sold this financial year?

☑️ Professional Review: Has an experienced CPA reviewed your tax computations to maximize your Section 19A elections?

Properly classifying and claiming capital allowances drastically lowers your net taxable income. PC Lee & Co has spent decades helping businesses structure their asset purchases and optimize their capital allowances legally. Contact our expert team today to ensure you never leave legitimate deductions on the table.

📞 Call us at: +65 6737 3710

✉️ Email: enquiries@pc-lee.com

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References

[1] Inland Revenue Authority of Singapore (IRAS). (2026). Capital Allowances. Retrieved from https://www.iras.gov.sg/taxes/corporate-income-tax/income-deductions-for-companies/claiming-allowances/capital-allowances