Methods of Costing: Job Costing vs. Process Costing

Knowing how much it costs to produce something is fundamental to running a profitable dairy business. But not all production looks the same – a dairy farm producing thousands of litres of standardized pasteurized milk operates very differently from one crafting small batches of artisanal cheese to order. That difference in production type is exactly why two distinct costing methods exist: job costing and process costing. Choosing the right one ensures your cost records are accurate, your pricing is sound, and your business decisions are backed by reliable data.

What is a costing method and why does it matter? 🔗

A costing method is a structured accounting approach used to calculate the total cost of producing a product or delivering a service. It tracks direct materials, direct labor, and overhead expenses in a way that reflects how production actually works. In the dairy sector, accurate cost tracking directly influences pricing strategies, profit margins, and decisions about resource allocation. Without the right costing method in place, a business risks underpricing products, misallocating resources, or making investment decisions based on flawed data.

The two primary costing methods used in manufacturing and food production are job costing and process costing. Both aim to capture material, labor, and overhead costs – but they do so in fundamentally different ways, depending on how production is organized.

Job costing: tracking costs for each unique order 🔗

Job costing, also called job order costing, is used when each production run is distinct – tailored to a specific customer order or product specification. Each job is treated as a separate entity, with its own cost sheet recording direct materials, direct labor, and overhead expenses independently from all other jobs.

In dairy businesses, job costing is relevant when producing non-repetitive, customized outputs. Consider a dairy processing unit that receives an order for 80 kg of flavored artisanal cheese from a specialty retailer, or a custom yogurt blend for a restaurant chain. Each of these orders requires different ingredients, different processing time, and possibly different packaging – so each needs its own cost record.

How job costing works 🔗

For every job taken up, a job cost sheet is opened. This sheet records:

• Direct materials – the raw inputs used exclusively for that job (e.g., specific milk volume, specialty cultures, packaging)
• Direct labor – the hours and wages of workers assigned to that job
• Applied overhead – a proportionate share of indirect costs like utilities, equipment depreciation, and facility costs

The total cost of the job is calculated using the formula: Total Job Cost = Direct Materials + Direct Labor + Applied Overhead. Once the job is complete, this total is compared to the revenue earned from that order to determine its profitability. According to Indeed’s career resource on costing methods, this detailed tracking allows managers to assess whether resources were used efficiently and identify which orders generate the best margins.

Advantages of job costing 🔗

Job costing gives businesses precise visibility into individual order profitability. It helps identify which clients or product types consume the most resources, and provides measurable data to support pricing decisions for future custom orders. As noted by Dapt’s analysis of costing methods, job costing delivers immediate feedback when a new product offering has hidden or unexpected costs – which is particularly useful for dairy businesses experimenting with specialty product lines.

Limitations of job costing 🔗

The main drawback is administrative complexity. Maintaining separate cost records for every single order is time-consuming and resource-intensive. For dairy operations handling high volumes of similar products, this level of individual tracking is neither practical nor necessary. Planergy’s guide on costing systems highlights that small businesses managing multiple simultaneous custom orders may find the recordkeeping demands particularly burdensome.

Process costing: tracking costs across continuous production stages 🔗

Process costing is used when production is continuous, repetitive, and results in large volumes of standardized, identical products. Rather than opening a new cost sheet for each unit, costs are accumulated for each stage or department of the production process. The cost from one stage is carried forward and added to the next, so by the end of production, the total accumulated cost represents the full cost of the finished product.

This method is a natural fit for large-scale dairy operations that produce standardized outputs – pasteurized milk, butter, packaged yogurt, or standard cheese varieties. In these settings, every litre of milk passes through the same sequence of processes, and individual unit tracking would be redundant.

How process costing works 🔗

Production is divided into distinct processes or departments. Each process incurs its own costs – materials, labor, and overhead – and these are recorded at the department level. The cost of output from one process becomes the input cost of the next. At the end of all processes, costs are totalled to give the cost per unit, calculated as:

Cost per Unit = Total Production Cost ÷ Number of Units Produced

For example, a large dairy processing facility might have the following stages: milk reception and testing → pasteurization → homogenization → fat standardization → chilling → packaging. Each stage adds its own costs to the running total. WallStreetMojo’s breakdown of costing methods describes this as a waterfall model – the output of one process becomes the input of the next, with costs accumulating progressively until the final product is ready.

It is important to note that in process costing, there is almost always work in progress (WIP) at the beginning and end of every period, since production flows continuously without pausing between orders. This is a key distinction from job costing, where WIP may or may not exist depending on whether jobs are completed within the period.

Advantages of process costing 🔗

Process costing significantly reduces administrative effort because costs are tracked at the department level rather than per unit. It supports better cost control at the process or department level, enables stable and consistent pricing for standardized products, and identifies cost-saving opportunities across high-volume production runs. It also supports inventory valuation in continuous production environments, which is essential for large dairy cooperatives and processing companies.

Limitations of process costing 🔗

Because costs are averaged across all units produced, process costing does not easily reveal cost variations between individual batches. If one production run was significantly more expensive due to equipment issues or raw material quality, that variation may be hidden in the average. This makes it less useful for businesses where product differentiation or customization matters.

Key differences between job costing and process costing 🔗

The table below summarizes the core differences between the two methods:

Can a dairy business use both methods? 🔗

Yes – and many do. A dairy business is not always confined to one type of production. A mid-sized dairy operation might use process costing for its daily pasteurized milk and butter output, while switching to job costing for a custom private-label yogurt order or a specialty cheese batch for a hotel chain. This hybrid approach is common in food manufacturing, where standardized and customized production coexist. The guiding principle is straightforward: match the costing method to the nature of the production activity, not the other way around.

As NetSuite’s accounting resource explains, the choice between these methods ultimately depends on what a company makes and how – whether production involves custom work in small batches or standardized mass production. Getting this decision right is not just an accounting exercise; it directly protects profit margins and ensures pricing reflects actual costs.

Practical implications for dairy entrepreneurs 🔗

For dairy entrepreneurs, the costing method chosen will shape everything from how you price your products to how you evaluate profitability and plan for growth. A farmer-producer making customized value-added products for institutional buyers benefits from job costing’s detailed visibility. A cooperative running a large processing facility producing uniform dairy commodities needs process costing’s efficiency and department-level oversight.

Either way, the goal is the same: knowing your costs accurately so you can price competitively, allocate resources wisely, and build a business that is financially sustainable. As dairy markets grow more competitive and margins tighten, having the right costing system in place is not optional – it is a foundational business requirement.

What do you think? If your dairy business produces both standardized milk and specialty artisanal products, how would you decide which costing method to apply to each – and where would you draw the line? Could a poorly chosen costing method lead to systematic underpricing without a business even realizing it?

References

1. https://www.indeed.com/career-advice/career-development/job-costing-vs-process-costing
2. https://www.netsuite.com/portal/resource/articles/accounting/job-order-costing-vs-process-costing.shtml
3. https://www.dapt.tech/job-costing/job-costing-vs-process-costing
4. https://planergy.com/blog/job-costing-vs-process-costing/
5. https://www.wallstreetmojo.com/job-costing-vs-process-costing/
6. https://testbook.com/key-differences/difference-between-job-costing-and-process-costing