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Stage 3 · Keeping it running

CAS-16: Depreciation and Amortisation

Selvi paid for her machines years ago. Are they free now? Every stitch says no.

What you will learn in CAS-16

  • What depreciation is, and when it starts (§§4.5–4.11, 5.1, 5.5)
  • Choosing the method (§§5.10–5.16)
  • Idle machines, revaluation and impairment (§§5.8, 5.9, 6.3)
  • Amortising software and licences (§§4.1, 4.9, 5.4)

Chapters

  1. A machine wears out a little every month · A machine paid for years ago still costs something every month it works (§§4.5, 4.6, 4.10, 4.11, 5.1, 5.5)
  2. Years or pieces? · Pick the method that matches how the machine wears out (§§5.10, 5.11, 5.13, 5.16)
  3. Two machines with no one to run them · Charge the uniforms only for machines that worked on them (§§5.8, 5.9, 6.1–6.5)
  4. The pattern software · Things you cannot touch wear out too (§§4.1, 4.9, 5.1, 5.4, 5.15)
  5. Spot the mistakes in the depreciation list · Use everything from this lesson (§§4.7, 5.8, 5.9, 6.3)

Key terms

  • Depreciation (§§4.5, 4.6, 4.10, 4.11, 5.1, 5.5): Spreading the part of an asset’s cost that wears out (its cost minus its value at the end) over its useful life, counted in years or in pieces it will make. Land is not depreciated. It starts when the asset is ready to use.
  • Choosing the method (§§5.10, 5.11, 5.13, 5.16): Use the method that follows how the asset is used up: equal each year, more in early years, or per piece. Review it at least once a year. Stop once the wearing-out part has been fully charged.
  • Assigning depreciation (§§5.8, 5.9, 6.1–6.5, 7): Charge depreciation to the work that used the asset. Idle machines are an abnormal cost. Extra depreciation from revaluation and impairment losses stay out. Wear on a machine used to build another asset goes into that asset. Show depreciation as its own line.
  • Amortisation (§§4.1, 4.9, 5.1, 5.4, 5.15): Spreading the cost of an asset you cannot touch (software, a licence, a design right) over its useful life. That life cannot be longer than the legal or contract rights, or 10 years from when it can be used. Its end value is usually zero.

Common questions

What is the depreciable amount under CAS-16?

The cost of the asset less its residual value (para 4.6).

Is depreciation on idle machines part of product cost?

No. Depreciation on idle or temporarily retired assets is abnormal cost (para 6.3).

Over how long can software be amortised?

Over its useful life, which cannot exceed the legal or contractual period, or 10 years from when it is available for use (para 5.4).

CAS-16 (Limited Revision 2017), Depreciation and Amortisation. Checked against the standard in November 2026. Selvi Garments, the school order and every figure in this lesson are fictional. Read the official text on the ICMAI Cost Accounting Standards page ↗ before applying it to real work.