Manufacturing accounting is a different discipline
A trading company buys and sells. A manufacturer transforms, and that transformation has to be measured — which is where the accounting gets genuinely difficult.
Raw materials become work in progress become finished goods, and each stage has to be valued. Production overheads have to be absorbed into inventory on a defensible basis rather than expensed. Capacity utilisation affects unit cost, so a quiet quarter makes everything look more expensive. Capital assets are substantial, which makes depreciation policy and impairment real questions rather than formalities.
Get the absorption basis wrong and both the inventory value and the reported margin are wrong, in the same direction, in every period until somebody notices. It is the most consequential accounting judgement a manufacturer makes and it is very often made once, by default, and never revisited.
Which businesses this applies to
KIZAD companies in manufacturing and processing, heavy industry, packaging, food processing, building materials, and large-scale warehousing and distribution.
Particularly businesses with meaningful work in progress, businesses with substantial plant and equipment, and businesses whose production volumes fluctuate — because that is where absorption costing produces results that surprise people.
The work, step by step
What this looks like in practice:
- Design the costing system — standard or actual, and how variances are analysed and treated.
- Set the overhead absorption basis and test it against actual capacity, since this determines both inventory value and reported margin.
- Account for work in progress at each production stage, on a basis that can be verified.
- Maintain the fixed asset register with component accounting where assets have parts of different useful lives.
- Set depreciation policy by asset class, and assess impairment where utilisation or market conditions have changed.
- Verify inventory physically across raw materials, work in progress and finished goods — three different counting problems.
- Prepare financial statements and the audit file, with the costing judgements documented.
- Handle corporate tax and VAT, including capital asset treatment and any customs interaction.
Overhead absorption: where manufacturers go wrong
Production overheads — factory rent, supervision, utilities, maintenance, depreciation on plant — are absorbed into the cost of what is produced rather than expensed as incurred. The basis and the assumed capacity determine everything downstream:
- Absorb on normal capacity, not on actual output. Otherwise a quiet quarter inflates unit cost and the inventory carried at it
- Unabsorbed overhead in a low-output period is expensed, not capitalised into inventory — it belongs to idle capacity rather than to product
- Review the basis at least annually, since production mix and capacity change and the basis rarely does
- Exclude non-production overheads — administration and selling costs do not belong in inventory value
- Analyse variances rather than simply posting them, because they are the most useful operational information the costing system produces
- Test against net realisable value, since absorbed cost can exceed what the product will actually sell for
The last point is where a downturn becomes visible in the accounts. Inventory carried at absorbed cost above net realisable value has to be written down, and manufacturers running below capacity are exactly the ones most likely to be carrying it.
Capital assets and the corporate tax interaction
A manufacturing business carries substantial plant and equipment, and the accounting treatment now feeds directly into the tax computation.
Depreciation policy by asset class, component accounting where parts of an asset have different lives, the distinction between capital improvement and repair, and impairment where utilisation has fallen — each of these changes accounting income, and taxable income starts from accounting income.
The repair-versus-capital distinction is the one that recurs. A major overhaul that extends an asset’s life is capital; routine maintenance is expense. Businesses under margin pressure have an incentive to capitalise, and businesses seeking a deduction have the opposite incentive. Neither instinct is a policy, and a consistent documented basis is worth considerably more than either — particularly since it will be tested by an auditor and potentially by the FTA.
Common mistakes
The expensive mistakes in this area are consistent:
- Absorbing overhead on actual output rather than normal capacity, inflating inventory in a quiet period.
- Administration costs absorbed into inventory, which overstates both assets and profit.
- Work in progress estimated rather than measured, so the largest judgement in the accounts has no basis.
- No net realisable value test, carrying inventory above what it will sell for.
- Variances posted without analysis, discarding the most useful information the system produces.
- Repairs and capital improvements treated inconsistently, depending on what the year needs.
- No component accounting on major assets with parts of different useful lives.
Timing and deadlines
The costing system and absorption basis should be set before the period they apply to and reviewed at least annually — production mix changes and the basis usually does not.
Inventory verification should cover raw materials, work in progress and finished goods, at the year end at minimum and cycled where volumes justify it. Corporate tax follows at 30 September 2026 for a December year end, and the financial statement requirement for licence renewal should be confirmed with the zone for your specific licence.
What you get
- A costing system with a documented absorption basis tested against capacity
- Work in progress valued on a verifiable basis
- Variance analysis that produces operational information rather than journal entries
- Fixed asset register with component accounting and documented depreciation policy
- Inventory verification across all three stages
- Financial statements and audit file with costing judgements documented
- Corporate tax return and VAT cycle
What to have ready
What we ask for up front:
- KIZAD licence and renewal details
- Production data: volumes, capacity, output by product
- Current costing system and absorption basis
- Bill of materials and routing data
- Fixed asset register with acquisition dates and costs
- Inventory listings for raw materials, WIP and finished goods
- Utility, maintenance and factory overhead costs
- Prior year financial statements
How this is priced
Bookkeeping is priced on transaction volume. The costing system design is a one-off fixed fee and is where the value concentrates for a manufacturer, because it determines inventory value and reported margin in every period thereafter.
Inventory verification is quoted per count and is more involved than for a trading business, because work in progress has to be assessed rather than counted. Financial statements, audit preparation and tax are fixed annual fees.
Related
Frequently Asked Questions
How should production overheads be absorbed?
On normal capacity rather than actual output. Absorbing on actual output inflates unit cost in a quiet period and carries that inflated cost into inventory. Unabsorbed overhead in a low-output period is expensed — it belongs to idle capacity, not to product.
What goes into inventory value?
Direct materials, direct labour and production overheads absorbed on a proper basis. Administration and selling costs do not belong there. Including them overstates both assets and profit, and it is a common finding in manufacturers without a formal costing policy.
How do we value work in progress?
By stage of completion, using a measurable basis — materials issued plus labour and overhead absorbed to that point. Estimating it means the largest judgement in the accounts has no support, and it is the first thing an auditor will test.
When do we write inventory down?
When absorbed cost exceeds net realisable value. Manufacturers running below capacity are the most likely to be carrying inventory above what it will actually sell for, precisely because the absorption maths inflated it. The test has to be applied rather than assumed.
Repairs or capital improvement?
A major overhaul extending an asset’s life is capital; routine maintenance is expense. What matters is a consistent documented basis rather than a judgement that follows what the year needs — because it will be tested by an auditor and potentially by the FTA, and taxable income starts from accounting income.
What is component accounting?
Depreciating parts of an asset separately where they have materially different useful lives — an engine within a machine, a roof within a building. It produces a more accurate charge and avoids the distortion of writing off a replaced component that was never separately identified.
Do KIZAD companies get the 0 per cent corporate tax rate?
Where the QFZP conditions are met — substance, qualifying income within de minimis, transfer pricing compliance and audited accounts. For a manufacturer selling into the UAE mainland, the customer mix is the question that decides it, and it is worth quantifying before year end.
If it was set at commissioning and never revisited, both your inventory value and your reported margin are probably wrong — in the same direction, every period.
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Last reviewed 27 July 2026. Rates, thresholds and deadlines change — the e-invoicing provider deadline has already moved once. Confirm current requirements with the Federal Tax Authority before acting, or ask us to check your position.