A Complete Guide to Construction Job Costing
- Cost Construction Accounting
- Sep 10, 2021
- 7 min read
Updated: Feb 24
If you are working in the construction industry, you might be familiar with the term “Job costing”. But how do you describe it in words? What is job costing? Do you truly know enough about job costing to make a better budget and plan for similar projects in the future? Why do you have to know about job costing? In this article, we will bring you a clear picture of the term "Job costing" and make it easier for you to understand other related terms that you should distinguish in construction accounting. Let’s figure it out together.
What is Job Costing?
Job Costing is a technique from management accounting. This method of costing is used to determine the costs of specific jobs or work. It is also applied where work consists of separate work or contract jobs. This practice is also known as ‘Job Lot Costing’ or ‘Lot Costing.’
There are two types of costs:
Direct: Costs directly linked to individual jobs when it is directly traceable
Indirect: These are the overhead costs not directly linked to a project.
Overheads are the business running costs. They have no direct link to generating income and are often put under Gross Profit on the Income Statement. Most commonly, these are placed underselling and general and administrative expenses.
What Are The Special Features of Construction Job Costing?
The special features of job costing striking our attention include:
Under Job Costing, production is carried on by a manufacturer against their customer’s order and not for stock.
Each job or work order is of a specific nature.
Under Job Costing, the cost of each job is ascertained separately. Therefore, it’s easy to track costs on a per-project basis to better analyze pricing and profitability, or in other words, determine profit or loss on each job.
It helps to detect which jobs are more profitable.
It provides the base for deciding the cost of similar jobs to be undertaken in the future as a part of future planning.
Job Costing helps manage and control costs better because the estimated and actual costs are compared.
Why is Accurate Job Costing Important?
Profitability is usually what business owners target. Accurate job costing can improve profitability because it helps to prepare accurate estimates, determine what to charge for a product, a job, or service.
Accurate job costing provides clear financial data on revenue and costs on any given project which helps with management decisions for future planning.
Top 10 Differences Between Job Costing and Process Costing
Understanding the difference between these two methods isn't just an accounting exercise, it directly affects how you track profitability on every project.
Purpose of the Costing Method: Job costing tracks the cost of a specific, unique project. Process costing tracks costs across a repeated, standardized process think assembly line production.
Type of Work Involved: The project-based approach fits when every job requires its own scope, labor, and materials. Process costing applies when you're producing identical units in high volume.
How Costs Are Calculated: With the project-based method, every dollar is tied to a specific job. With process costing, total costs are divided evenly across all units produced a formula that doesn't translate well to the job site.
The Cost Center: Under a project-based system, the job itself is the cost center. In process costing, it's the production stage.
Level of Customization Required: Each construction project demands its own cost tracking and reporting. Process costing assumes uniformity, which is exactly why it falls short for contractors managing variable scopes of work.
Cost Transfer Between Projects Costs stay with the job they belong to and are never transferred. In process costing, costs flow from one production stage to the next.
Opportunities for Cost Reduction: Process costing benefits from repetition and efficiency. Since every construction job is unique, accurate estimating and real-time tracking become your best tools for protecting margins.
When Costs Are Determined: The final project cost isn't known until the job is complete which is why budget-to-actual tracking matters throughout the lifecycle. In process costing, cost per unit is determined after each production cycle.
How Losses Are Handled: In construction, losses aren't typically broken into categories. Process costing distinguishes between normal losses and abnormal losses, both worth understanding when analyzing overruns.
Work in Progress (WIP): WIP may or may not appear on your books at period-end depending on project status. In process costing, WIP is almost always present. Either way, managing WIP accurately is critical for financial reporting and bonding capacity.
What Type of Business Can Use Job Costing?
Any business that provides products or services to clients benefits from job costing. This method help business owners understand better their own costs in terms of products, materials, parts.
Job Costing method is considered most suitable to such activities as painting and decorating, roofing and tiling, automobile garages, electrical fittings, plumbing works, repair shops, etc. where work is done according to the customer’s specification. The method is often associated with construction companies since they work with third-party contractors and each of their jobs is different. However, almost any business can use job costing because it develops accurate estimates of material, labor and overheads costs which help businesses to position themselves to deliver jobs on budget and on time.
A Majority of the Following Industries Use Job Costing:
Health care and life sciences organizations
Energy utilities
Consulting firms
Transportation and logistics providers
Marketing and advertising agencies
Manufacturers
Retailers
Engineering offices
What Are The Advantages of Job Costing?
Obtain the cost of production of every product or job
Ascertain the profit or loss of the production or execution of the product/order/job
Determine the profitability for each job individually
Helps with preparing correct estimates of the cost of jobs being undertaken
Helps with judging the operational efficiency of the business activities
Provides a detailed cost analysis of labor, materials, and overheads for each job
Compare estimates and actual costs
Detect jobs that don’t make a profit
Provide a precise quote
Documents Used in Job Costing
Manufacturing or production order: This one allows production departments to produce a specified quantity of a product.
Job cost sheet: often used to record costs incurred in the production stages.
Other documents: includes material requisition slips, tools and spares order, time tracker, inspection order, etc. are used as a control mechanism to carry out the dispatching functions.
How to Calculate Job Costing
Unlike financial statements which showing us performance after a job is complete, job costing gets in more details of specific costs associated with certain work or projected. The basic construction job cost accounting formula is adding together the cost of direct materials, direct labor, and applied overhead. We are going to show you how these costs are calculated in each of their own areas.
Labor costs: this is your paying to all workers involved on a particular job, third parties and sub-contractors included.
Labor cost = Number of working days x daily pay rate x number of workers |
Material costs: Add direct & indirect material costs together then you have material costs. Direct costs include raw materials whereas indirect costs might be tools, machinery used to produce goods, or office supplies.
Overhead: This is the most challenging to calculate accurate estimates as it requires us to break down the business’ daily operating costs and attribute the right proportion to the job or project. We need to include the total overhead needed to complete the job including office rent, electricity, other business expenses, etc. Due to its complexity, businesses often use a blanket overhead fee for each job such as 10% per job.
How Do Businesses Track And Prepare Job Cost Sheets?
Due to the complexities associated with managing costs for each job, most businesses use accounting software to put the job sheet preparation in automation. Some accounting software with job costing construction features commonly used is SecturaFAB, QuickBooks (Desktop & Online versions), Procore, BuilderTREND, ClockShark, BQE Core Suite, Premier, etc. Integrated software solutions make the job costing process much simpler due to their accuracy and better tracking systems.
In our previous article, we mentioned: "How To Do Job Costing In QuickBooks Online?". If you are using Quickbooks for your construction business, you should definitely not ignore them.
What Can Job Costing Benefit From Accounting Software?
Listed below are the benefits that the job accounting software can bring to you:
Better Cost Control Historical and real-time cost data give you a clearer picture of where money is going reducing losses by keeping both billing and labor fully accounted for.
Better Business Management Full visibility into project data helps you spot what's working, what's not, and where to improve day by day.
Fewer Client Conflicts Accurate cost reporting means more reliable estimates and fewer surprises for your clients. Keeping them updated throughout the project goes a long way in building trust.
Real-Time Reporting On high-stakes jobs, timely data is everything. With up-to-date labor, material, and overhead numbers, you can make faster decisions that protect both profitability and client satisfaction.
At the end of the day, every business exists to make a profit. The right costing system helps you get there tying revenue to costs, flagging areas for improvement, and delivering accurate estimates your clients can count on. If you're serious about running a tighter, more profitable operation, job costing isn't optional. It's essential.
Ready to take control of your numbers? Contact Construction Cost Accounting for a free 30-minute consultation.
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