How to Calculate the Real Cost per Tray of Eggs

Cost per tray is the amount the poultry unit spends to produce one saleable tray of eggs. It should be calculated for a defined period, such as one week, one month or a complete flock cycle.

The costs and saleable egg production must come from the same period. Dividing one month's expenses by one week's trays will produce a misleading result.

Cost per tray = Total layer-production costs ÷ Total saleable trays produced.

Estimated margin per tray = Average selling price per tray − Production cost per tray.

The result becomes more reliable when feed usage, egg collection, rejects, health costs, flock size and other expenses are recorded consistently.

Feed: layers mash, concentrates, supplements, minerals and any other feed consumed by the flock during the period.

Flock cost: the cost of purchasing or raising chicks and pullets should be allocated over their expected productive life instead of disappearing from the calculation after placement.

Labour and flock health: wages, vaccination, medication, veterinary support, biosecurity and other flock-management costs.

Farm operations: egg trays and packaging, electricity, water, transport, repairs, housing and equipment allocation and other expenses attributable to the poultry unit.

Losses: mortality, feed wastage, cracked eggs, rejects and missing stock may reduce the number of saleable trays or increase the cost carried by every tray sold.

Consider a commercial unit with 6,000 active layers producing an average of 180 saleable trays per day. Over 30 days, the flock produces 5,400 saleable trays.

Record the complete egg collection, then separate saleable eggs from cracked, dirty, rejected, home-used, staff-used, incubated, missing or otherwise lost eggs.

Eggs that cannot be sold at the normal tray price should not be silently counted as full-value sales. Their quantity and actual value should be recorded separately.

This distinction helps the farmer see whether the problem is production, egg quality, handling, theft, rejects or the selling price received.

Feed commonly carries the largest share of layer-production cost. A change in feed price, consumption or wastage can therefore move the cost per tray quickly.

However, dividing feed cost alone by the trays produced does not show the real production cost. The flock, labour, health, packaging, utilities, transport, housing and other operating costs still have to be carried by the eggs sold.

The commercial question is not simply how many trays were collected. It is how much value remained after the flock produced and sold those trays.

The same flock can consume a similar amount of feed while its laying rate changes. When production falls and major costs remain, every saleable tray carries a larger share of those costs.

Review trays per day together with active bird numbers, feed consumed, mortality, rejects and flock age. This makes it easier to distinguish a temporary production change from a flock whose margin is steadily weakening.

Cost per tray should therefore be reviewed by flock, house or batch—not only for the poultry business as one combined number.

Using trays collected instead of trays that were saleable at the expected price.

Leaving out the cost of purchasing or raising the flock because it was paid before laying began.

Calculating from feed cost alone and calling the balance profit.

Ignoring feed taken on credit, unpaid wages or other costs that belong to the production period.

Combining several flocks and hiding the poor performance of one house or batch.

Treating every egg sale at the standard tray price even when rejects, small eggs or cracked eggs were sold for less.

Compare cost per tray across weeks, months, houses and flocks and investigate where the margin begins to reduce.

Measure whether a change in feed, supplier, flock management or selling price improved the final margin—not merely production volume.

See how mortality, rejects, feed wastage, reduced laying rate and rising operating expenses affect every tray sold.

Use actual records when deciding whether to retain, replace or expand a flock and when discussing prices with customers or distributors.

Farm360 brings flock numbers, egg collection, feed usage, mortality, treatment, vaccination, expenses and sales into one connected poultry record.

The farmer can review production and cost by flock, house, batch or period and identify where margins are under pressure before the final flock report.

Can your current records produce a reliable cost per tray? Start the free Farm Profit Visibility Check or request a Farm360 poultry demonstration to see how daily records can support clearer commercial decisions.

How do I calculate egg production cost per tray? Add all relevant layer costs for the selected period and divide them by the saleable trays produced during that same period.

Should cracked or home-used eggs be included? Record them separately. They form part of production but should not be treated as full-price saleable trays.

Should I include the cost of the flock? Yes. The cost of purchasing or raising the birds should be allocated over their expected productive period.

How often should I calculate cost per tray? Monthly calculation is practical for many commercial farms, while weekly monitoring helps identify production, feed, mortality and egg-quality changes earlier.