A business can complete more jobs, generate more revenue, and still struggle to make a profit.

One reason is that business owners don’t always know exactly how much each job costs to complete.

This is where job costing can make a significant difference.

Job costing is a method of tracking the revenue and costs associated with a specific job, project, customer, or piece of work. It helps business owners understand whether individual jobs are actually profitable and whether the price charged adequately covers the resources required to deliver them.

For small businesses, particularly those working on projects or providing services, job costing can provide valuable information for pricing, quoting, budgeting and financial decision-making.

What Is Job Costing?

Job costing involves tracking the costs and revenue associated with a particular job or project.

Instead of looking only at the overall profitability of the business, you can examine individual jobs and ask:

“How much did this job actually make?”

Depending on the type of business, a job may be:

• A construction project
• A renovation
• A landscaping contract
• A consulting engagement
• An accounting project
• A marketing campaign
• A repair
• A manufacturing order
• A custom product
• A professional service engagement

The exact information tracked will depend on the business, but the objective is the same: understand the financial performance of each job.

Why Does Job Costing Matter?

Business-wide profit figures can hide problems.

Imagine your business generated $1 million in revenue and made a healthy overall profit.

That sounds positive.

But what if several major projects were completed at very low margins or even at a loss?

Without job-level information, those problems can be difficult to identify.

Job costing can help you understand:

• Which jobs are profitable
• Which jobs are underperforming
• Whether quotes are accurate
• Whether labour costs are higher than expected
• Whether materials are being used efficiently
• Whether prices are sufficient
• Where unexpected costs are occurring
• Which customers or services generate stronger margins

This can help turn historical financial information into practical business intelligence.

What Costs Should Be Included in Job Costing?

A useful job costing system should capture the major costs associated with delivering the work.

These commonly fall into several categories.

Labour Costs

Track the time employees or other workers spend on the job.

This may include:

• Regular hours
• Overtime
• Project management
• Site visits
• Administration directly related to the job
• Other relevant labour

For service businesses, labour can be one of the most significant costs.

Materials and Stock

If a job requires materials or products, those costs should be allocated to the relevant project.

Examples include:

• Building materials
• Parts
• Products
• Packaging
• Consumables
• Special-order items

Tracking these costs against the job can reveal whether material usage is consistent with the original quote.

Subcontractors

If you engage external contractors or specialists to complete part of the work, their costs should generally be associated with the relevant job.

This helps provide a more complete picture of what the project actually costs.

Direct Expenses

Other expenses may also relate directly to a specific job.

These could include:

• Freight
• Travel
• Equipment hire
• Permits
• Delivery
• Specialist services
• Project-specific software

The more accurately direct costs are captured, the more useful the final job profitability calculation becomes.

What About Overheads?

Not every business cost can be directly assigned to one job.

For example:

• Office rent
• General insurance
• Accounting fees
• Software subscriptions
• Administration
• Utilities
• General marketing

These are often considered overheads.

A business may need to allocate an appropriate portion of overheads when assessing the true profitability of its jobs.

The method used will depend on the business.

For some businesses, a simple overhead allocation may be appropriate. Others may benefit from a more detailed costing system.

The important point is that a job that appears profitable based only on direct costs may not be sufficiently profitable once its share of overheads is considered.

How Do You Calculate Job Profitability?

A simple starting point is:

Job Revenue − Job Costs = Job Profit

For example, suppose a business quotes a customer $20,000 for a project.

The final costs are:

• Labour: $6,000
• Materials: $4,000
• Subcontractors: $2,000
• Other direct costs: $1,000

Total direct job costs are $13,000.

The initial job profit before any relevant overhead allocation would therefore be:

$20,000 − $13,000 = $7,000

That represents a 35% margin on the job before considering any additional overhead allocation.

The business can then compare the actual result with what was originally expected.

Estimated Costs vs Actual Costs

One of the most valuable parts of job costing is comparing your original estimate with the actual result.

Before starting a job, you might estimate:

After completing the project, you may discover:

The difference is significant.

If the original quote was based on $12,000 of costs, the additional $2,500 could substantially reduce the expected profit.

Without job costing, you might not realise where the margin disappeared.

Job Costing Can Improve Your Quoting

Historical job costing can make future quotes more accurate.

Suppose you consistently estimate that a particular type of project requires 40 labour hours, but your records show that similar jobs actually take 55 hours.

That information should influence future pricing.

You may need to:

• Increase your labour allowance
• Adjust your price
• Improve the process
• Reduce inefficiencies
• Change the scope
• Set clearer customer expectations

The more accurate your historical information, the more informed your future quotes can become.

Job Costing Can Identify Unprofitable Work

Not all revenue is equally valuable.

You may discover that a particular type of job consistently produces lower margins than other work.

For example:

Service B generates the most revenue, but its margin is significantly lower.

This information could influence your pricing, sales strategy and future service mix.

You may decide to:

• Increase the price
• Change the scope
• Improve efficiency
• Reduce costs
• Focus more heavily on higher-margin work

Watch Your Labour Hours

For businesses where labour is a major cost, tracking hours is particularly important.

A job might be quoted based on 50 hours of work but ultimately require 70.

Those additional 20 hours can significantly reduce profitability.

Ask:

• How many hours were estimated?
• How many hours were actually worked?
• Which tasks took longer than expected?
• Were additional hours approved?
• Were all billable hours invoiced?

This information can help identify recurring estimating or operational problems.

Job Costing Can Help With Pricing Decisions

Your prices need to cover the resources required to deliver the work and provide an appropriate return.

If job costing shows that your margins are consistently below target, it may be time to review your pricing.

You may discover that:

• Materials cost more than expected
• Labour is taking longer
• Customers require more support
• Scope changes aren’t being charged
• Certain services are underpriced
• Overheads aren’t adequately covered

Pricing based on accurate historical costs is generally more reliable than pricing based purely on what competitors charge.

What Is the Difference Between Job Costing and Business-Wide Accounting?

Traditional accounting tells you how the business is performing overall.

Job costing provides a more detailed view of individual projects or jobs.

Think of it this way:

Business accounting asks:
“How profitable is the business?”

Job costing asks:
“Which jobs are making the business profitable?”

You ideally want both.

Overall financial reporting provides the big picture, while job costing can help explain what is happening underneath it.

Which Small Businesses Can Benefit From Job Costing?

Job costing can be particularly useful for businesses where work varies from project to project.

This may include:

• Builders
• Tradies
• Electricians
• Plumbers
• Landscapers
• Engineers
• Consultants
• Marketing agencies
• IT businesses
• Creative agencies
• Professional service firms
• Manufacturers
• Contractors

However, almost any business that delivers distinct projects or services can potentially benefit from understanding the cost and profitability of individual jobs.

Common Job Costing Mistakes

Job costing is only useful when the information being recorded is reasonably accurate.

Common problems include:

Not Tracking Labour Hours

If labour is a major cost but hours aren’t tracked accurately, job profitability can be misleading.

Forgetting Small Costs

Small expenses can add up across multiple jobs.

Not Recording Scope Changes

Additional work should be identified and accounted for where appropriate.

Using Estimates Forever

Estimated costs should be compared with actual results so future estimates can improve.

Ignoring Overheads

A job may appear profitable based on direct costs but contribute little toward the overall costs of operating the business.

Reviewing Results Too Late

If you only review job profitability months after completion, you may miss the opportunity to correct problems on similar jobs that are currently underway.

How Often Should You Review Job Costs?

Ideally, job costing shouldn’t only happen after a project is finished.

For larger or longer projects, review costs while the job is still underway.

Monitor:

• Actual labour hours
• Materials used
• Additional expenses
• Revenue invoiced
• Remaining work
• Estimated final cost
• Expected final profit

This allows you to identify problems early rather than discovering them after the project has already lost money.

How Can Technology Help With Job Costing?

Modern accounting and business software can make job costing easier by helping businesses track invoices, expenses, time, and project information in one place.

Depending on your business, you may use:

• Accounting software
• Time-tracking systems
• Project management software
• Invoicing systems
• Inventory management tools
• Payroll systems

The technology itself isn’t the most important part.

The important thing is establishing a consistent process for capturing the information and using it to make decisions.

How Can an Accountant Help With Job Costing?

Setting up an effective job costing system involves more than recording expenses.

You need to determine:

• Which costs should be tracked
• How labour should be allocated
• How overheads should be considered
• Which profitability measures matter
• How estimates should be compared with actual results
• How the information should influence pricing and quoting

At Latitude Accountants, we help Australian business owners understand their financial information and use it to make better business decisions.

Job costing can provide valuable insight into where your business is making money, where margins are being lost, and which jobs are worth pursuing.

Frequently Asked Questions About Job Costing for Small Businesses

What is job costing in simple terms?

Job costing is the process of tracking the revenue and costs associated with a specific job or project to determine how profitable that work was.

Why is job costing important for small businesses?

It helps business owners understand the actual profitability of individual jobs, improve pricing, identify cost overruns, and make more accurate future quotes.

What costs should be included in job costing?

Depending on the business, costs can include labour, materials, subcontractors, equipment, freight, travel and other direct project expenses. Appropriate overheads may also need to be considered.

Can job costing help improve pricing?

Yes. Historical job costing can show whether your current prices adequately cover the actual costs of delivering your work and provide the desired profit margin.

Is job costing only useful for construction businesses?

No. It can benefit any business that delivers distinct projects, contracts or services, including trades, consultants, agencies, professional services and manufacturers.

Should I track job costs while the project is still underway?

For larger or longer projects, regular monitoring can be particularly useful. It allows you to identify cost overruns and margin problems before the job is completed.

What is the difference between job costing and regular accounting?

Regular accounting provides an overall view of the business’s financial performance. Job costing provides more detailed information about the profitability of individual jobs or projects.

Talk to Latitude Accountants About Your Job Costing and Business Numbers

Knowing how much revenue your business generates is important, but knowing which jobs are actually profitable can be even more valuable.

Job costing can help you understand your margins, improve your quotes, identify cost overruns and make better decisions about the work your business takes on.

Latitude Accountants provides accounting, budgeting, forecasting, tax planning and business advisory services to help Australian business owners understand their numbers and build more financially sustainable businesses.

If you’re unsure whether your current jobs are generating the profit you expect, our team can help you review the numbers and develop a clearer picture of your job profitability.

Latitude Accountants

📍 Sydney Olympic Park | Marrickville | Melbourne | Loxton
📞 1300 706 597
📧 info@latitudeaccountants.com.au

Want tailored business advice? Let’s chat.

Disclaimer

This article provides general information only and does not constitute financial, tax, accounting or business advice. Job costing methods and the treatment of specific costs can vary depending on the business, industry and circumstances. You should seek advice from an appropriately qualified professional before making financial or business decisions based on the information provided.