Production efficiency can directly affect the embedded emissions intensity of steel and aluminium products exported from Southeast Europe, even when the emissions profile of the purchased precursor remains unchanged. Material lost through cutting, trimming, defects or rejected output increases the quantity of input required to produce each tonne of saleable goods.
For manufacturers, this links factory performance to both carbon reporting and export costs. Higher yields can reduce material expenditure and the precursor-related emissions attributed to each tonne of finished output. The effect is especially relevant when purchased steel or aluminium represents a substantial share of a product’s embedded emissions.
Material losses affect emissions per tonne of output
The CBAM calculation methodology takes account of precursor quantities consumed in the production process, rather than considering only the material retained in the finished product. Relevant sector-specific rules address losses and scrap within this framework. Manufacturers must therefore establish a reliable material balance and apply the appropriate emissions treatment instead of assuming that one tonne of finished goods necessarily requires one tonne of input.
A simplified steel-processing example illustrates the difference. A manufacturer consuming 1.10 tonnes of input per tonne of accepted product, with a relevant precursor intensity of 2.0 tonnes of CO₂e per tonne, records a precursor contribution of 2.20 tonnes of CO₂e per tonne of output. If input consumption falls to 1.05 tonnes, the contribution decreases to 2.10 tonnes of CO₂e per tonne of output, before processing emissions and other applicable methodological requirements are included.
The financial effect can be significant even without assuming a future carbon price. At an illustrative input cost of €600 per tonne, reducing consumption by 0.05 tonnes per tonne of accepted output saves €30 per tonne of output in gross material costs. Across 10,000 tonnes of output, the saving reaches €300,000, before accounting for changes in scrap revenue, reprocessing expenditure or other operational effects.
These figures are illustrative rather than reported company results. They demonstrate how yield improvements can support an investment case through material savings alone.
Scrap revenue and emissions accounting are different
Recovering and selling offcuts can offset part of the cost of purchased material, but the financial benefit must be distinguished from emissions accounting. Selling scrap does not automatically eliminate the emissions associated with producing the original input. Any emissions adjustment must follow the applicable methodology; revenue received from a scrap buyer is not equivalent to an emissions deduction.
Internal recycling also requires consistent records. An aluminium processor may return offcuts for remelting, while a steel manufacturer may send scrap back into steelmaking. Counting the same material repeatedly as new external input can distort consumption figures. Conversely, excluding recycled material without accounting for the relevant process can introduce another error.
A robust material balance should document each transfer and distinguish between external purchases, internal movements, recycled material and final consumption. These records help prevent inconsistencies between production reporting, financial accounts and emissions calculations.
Identifying the causes of lost material
Yield improvement begins with measuring where and why losses occur. Material may be damaged during storage, wasted through unsuitable cutting dimensions, rejected because of dimensional defects or lost when customers refuse finished products. Each cause requires a targeted response rather than a general instruction to reduce scrap.
Customer requirements can also restrict the scope for optimisation. Safety margins, surface quality and dimensional tolerances may limit changes to cutting patterns or input sizes. Proposed adjustments should therefore be tested against the finished-product specification. A nominal increase in yield may deliver little value if it causes more defects or customer rejections after delivery.
Equipment upgrades should be supported by operating data. Improved cutting controls, material-handling systems and process monitoring may reduce losses, but expected gains should be established through trials or credible engineering assessments. Investment calculations should also include maintenance, staff training and potential production interruptions. An assumed carbon saving without a substantiated operational improvement is not a sufficient basis for financing.
Consistent production records support credible CBAM figures
Emissions calculations supplied to EU customers must use the relevant product quantity and production boundary. Manufacturers should not select a denominator simply because it produces a lower reported intensity. Production and inventory records need to distinguish finished products from intermediates, rejected output and material retained for later processing.
Monthly reconciliation of input consumption and production output can reveal problems before they affect annual reporting. If input use rises without an identifiable change in product mix, the manufacturer should investigate possible process defects, inventory discrepancies or the incorrect classification of internal transfers. Linking accounting data with factory records can help resolve these issues before verification.
Product mix is particularly important when comparing performance over time. A facility producing short runs or complex shapes may experience a different loss profile from one manufacturing standard dimensions in continuous runs. Monthly yield figures that ignore these differences may wrongly attribute a deterioration to equipment or staff performance.
Production reports should explain significant changes in order characteristics and operating conditions. The emissions team can then distinguish between an intensity change caused by factory performance and one arising from a different product mix or supplier profile.
Manufacturers should also document the baseline before introducing an efficiency measure. Without a recorded starting point, it can be difficult to separate genuine improvements from seasonal variations in output or temporary changes in the orders being processed.
Yield improvements can strengthen investment cases
For banks and other lenders, material efficiency offers a measurable basis for evaluating industrial investment. Financing assessments can use recorded throughput and input consumption to estimate material savings, then test the expected payback against less favourable operating scenarios.
Any additional carbon benefit should be assessed separately under the applicable calculation methodology. This keeps the investment case grounded in operational savings rather than making repayment dependent on a future market premium for lower-emission products.
For Southeast European steel and aluminium processors, material efficiency is therefore part of export competitiveness as well as factory management. Where precursor emissions account for a large share of the total, reducing avoidable losses can lower both input costs and the emissions contribution per tonne of accepted output. The commercial objective is to demonstrate that improvement through consistent production data and a calculation that accurately reflects material use.
