Construction Accounting 101: Principles and Best Practices

Construction Accounting 101: Principles and Best Practices

Construction accounting is a unique branch of accounting that reflects the specific financial needs of contractors and construction companies. It’s not a parallel universe, but it’s worth knowing some important differences between construction accounting and other types of business accounting.

Construction projects are usually larger and more complex than other types of business venture. So, the impact of inaccuracies and imprecision is greater in construction accounting.

For one thing, construction companies typically have a lot of money tied up in projects that are in progress. That means they must put more effort into carefully tracking their costs and revenue, bill clients correctly, and diligently manage their cash flow.

In addition, construction accounting deals with projects that vary in size, scope, materials, and labor costs. Construction managers need to have detailed, job-specific financial data for every project. They need skills to process different costs and transactions under each project’s unique circumstances.

If you’re in the construction industry and want to keep a closer eye on your company’s finances to improve your bottom line, this guide is for you. Here’s a quick overview of what you need to know.

What is Construction Accounting? 

Construction accounting is a more robust and specialized form of accounting. It’s for the construction industry to track job costs, manage subcontractor payments, and invoice customers correctly.

Construction accounting tracks progress payments, retainage, change orders and other project-specific financial data that is not usually part of standard accounting practices. This data is essential for understanding a construction project’s financial health and making sound business decisions.

At its core, construction accounting adheres to the same principles as traditional accounting. If you have a background in accounting, you will find construction accounting familiar in many ways.

Construction Accounting vs Traditional Accounting 


Unlike many industries like manufacturing, where businesses have a consistent stream of revenue from product sales, the construction industry depends on projects. This means it’s impossible in construction to predict how much revenue will be coming in month-to-month or even year-to-year. Everything depends on when the company will have new projects and the size of those projects.

For this reason, construction accounting tracks job costs and job profitability rather than simply overall company profitability. This helps construction businesses better understand which projects are profitable and which ones are losing money, and make informed decisions about where to allocate their resources.

Even though it seems all construction projects have similar production requirements, the fact is they are very different in terms of site conditions or local variables like labor, cost of materials and legislation. As a result, construction accountants treat each and every construction project as a unique, short-term profit center with unique inputs and requirements.

Decentralized Production

Since construction projects happen on different sites each time, construction accounting includes mobility costs in the bid. This is a way of preventing productivity loss due to the movement of resources and personnel.

Decentralized production applies to projects where production does not happen from the same physical location. Consequently, the inventory of equipment and other resources are also in different locations. Contractors move them to the new construction location for each new project, resulting in additional mobility costs.

Some construction companies choose to lease local equipment and resources. That’s because it helps to avoid the overhead costs of owning, maintaining and moving their own fleet.

Decentralized production also means construction accounting reflects the fluctuating costs of labor and materials in a locational context. These costs can vary significantly depending on the region, country or city where the project is taking place.

In traditional accounting, there is less focus on the variability of costs, as the costs of main materials and labor are often more predictable and stable.

Long-Term Contracts

Construction projects, even small ones, often involve long-term contracts. This is due to the nature of the work, which usually requires a lot of time to complete and has a high risk of delays because of bad weather, material shortages or other factors beyond the direct control of the construction company.

This means that unlike traditional accounting, where businesses typically book revenue and expenses in the same period, construction accounting businesses often have to wait a long time to receive payments for their work (i.e. progress billings)․ Usually, if a project has delays, accounting companies do not get payments for all the work completed to date.

Many construction contract terms allow for 30, 60 or even 90 days invoice payments. Moreover, retainage withholding or disputes may delay payment even further.

Construction accounting reflects all this in the form of a schedule of multiple payments. This schedule can span multiple accounting periods or even years. This makes construction accounting more complex than traditional accounting and requires businesses to understand their cash flow in more detail to avoid financial difficulties.

That’s why many construction businesses use the accrual basis of accounting. They record revenue when it is earned and expenses when they are incurred, regardless of when the actual cash payment is received.

Fluctuating Costs

Construction accounting also has to deal with the fact that costs can fluctuate greatly during the life cycle of a project. In the modern world, rarely can something have the same price for more than a few months due to the volatile global economy, changing interest rates, natural disasters, and more. All these events can significantly impact the cost of materials and labor, which can in turn affect the profitability of a construction project.

Construction projects are more sensitive to price changes of materials, as these make up a large part of the project expenses. At the same time, it’s too costly to stockpile materials for a project in advance (unlike traditional manufacturing).

Indirect costs like overhead and general and administrative expenses can also fluctuate greatly, depending on the size and complexity of the project.

These factors complicate the construction project estimation and cost control process, making it more difficult to accurately predict a project’s final cost.

Challenging to Predict Profitability

All the factors above make it challenging to predict the profitability of a construction project. There are many variables that can affect the final cost of the project. Construction schedule is one of them.

Not having a clear image of the project’s final profit can put construction businesses at risk. They may not be able to cover their costs if their projects end up costing more than expected.

This is why a good understanding of cash flow is essential for construction businesses, as it can give them a better idea of when they will receive payments and help them manage their finances more effectively.

Construction Accounting at a Closer Look: Key Principles 

Although construction accounting is more complex than traditional accounting, there are many software platforms and tools, as well as tested approaches, that help businesses manage their finances more effectively.

Scroll down to see the main principles of construction accounting and how Buildern construction management software can make construction accounting a breeze for you!

Job Costing 

Traditional accounting relies on the general ledger (G/L) to track all financial transactions. This is the standard method of double-entry bookkeeping, according to which all transactions are in separate accounts (revenues, expenses, etc.).

The ledger accuracy depends on the balance sheet equation:  Assets = Liabilities + Equity

Each account contains additional information about transactions, such as date, description, reference number, etc. And this is what a G/L looks like:

General ladger traditional accounting
Source: Restaurant 365

What Does Job Costing Add to G/L?

To fill this gap, construction businesses use job costing.

The G/L method helps to get a broad overview of the company’s financial performance. This approach, however, does not provide detailed information about specific projects or jobs.

Job costing is a method of accounting that provides detailed information about the costs associated with specific projects or jobs.

In construction accounting, job costing tracks the financial progress of each project separately. This approach is necessary as each construction project has its own specific expenses, revenue streams and other financial transactions.

Unlike G/L, which displays company finances, the Job Costing method tracks project data. 

Job costing displays the physical completion of the construction project in units, costs in monetary units, and labor hours.

While there is a G/L account for each category of income and expense that allows the company to track the overall progress of a company, there is a particular job costing account for every job or project to track its individual progress and costs.

This way, contractors can easily track the financial progress of every construction project and make more informed decisions about their business.

They can also compare each project’s estimated and actual costs and make necessary adjustments to their budgets on the go.

Cost Budgeting in Buildern

Buildern allows construction managers to create and manage multiple project budgets simultaneously.

It seamlessly integrates with QuickBooks and Xero. As a result, every transaction recorded in your preferred accounting software reflects in your construction management software in real time.

Create new project
Multiple construction projects in Buildern construction management software

Contract Revenue Recognition 

Revenue recognition in construction accounting differs from that of traditional accounting. 

Custom home building contracts and billing terms vary for each project, depending on the scope of the project and negotiations between the parties.

Usually, the whole project cost is divided into several parts. The first payment is the downpayment from the client to help the contractor to start the project. Further, contractors send invoices in parallel to the project’s progress. Usually, contractors send an invoice to the client after the completion of each construction stage. This method is progress billing and is the most popular construction billing approach. 

So, construction accounting uses two main types of Revenue Recognition approach – Percentage of Completion (POC) and Completed Contract.

Let’s take a closer look at each!

POC Revenue Recognition 

The Percentage of Completion (POC) method is more suitable for larger construction businesses. It provides a more accurate financial picture of the company.

Under POC, revenue is recognized and the expenses are reported based on the percentage of work completed on a project. If 20% of the construction project is ready, the company recognizes 20% of the total contract value as revenue. Contractors invoice their clients based on the percentage of work completed.

This approach requires careful tracking of the project’s progress and accurate estimation of costs to succeed. That’s why Buildern’s Project Management module is perfect for construction businesses using POC revenue recognition.

Project progress scheduling tasks
Construction schedule management in Buildern

The module allows managers to easily track the progress of each project and generate accurate reports to make informed decisions about their business. The project Gantt chart allows you to track every task and have a real-time view of your project’s progress. When you need to invoice your client, you can easily do so with just a few clicks from your project dashboard.

Use construction project management software online

Completed Contract Revenue Recognition

This approach is more suitable for small construction businesses as it is simpler to implement and doesn’t require as much project tracking.

Under Completed Contract, revenue and expenses are recognized when the project is completed. 

CCM sometimes allows contractors to defer taxable revenue if the project completion happens in the following tax year.

If you operate in the USA

The IRS states that the Completed Contract Method is permissible for home construction and small construction contracts only. Small contracts refer to those completed within two years after the start or with limited average annual gross revenue

If you operate in Australia

The recognition of revenues and expenses associated with the construction project depends on whether it’s probable to estimate the outcome of the contract reliably. If the contract outcome can be reliably estimated, contract revenue and contract costs are recognized by reference to the completion stage of the contracting activity at the reporting date. If the contract outcome can’t be reliably estimated, revenue is recognized to the extent of contract costs incurred that it is probable will be recoverable.

Read more in Accounting Standard AASB 111 for Construction Contracts.

Contract Retainage

In the construction industry, it is common for contractors to withhold a certain percentage of the contract value until the project’s completion. This is retainage and it usually ranges from 5% to 10% (varies from state to state).

In other words, retainage is the amount of money the owner withholds from the contractor until the completion and final approval of the project. 

The primary purpose of retainage is to provide security to the owners in case the contractor fails to complete the project or if there are defects in the work.

What Does Retainage Mean for Construction Accounting?

Generally, contractors record any unpaid invoice as Accounts Receivable on their balance sheet, in effect assuming that the revenue has already been earned. However, when it comes to retainage, things are a bit different.

When the owner withholds the retainage, the contractor cannot record it as Accounts Receivable. Instead, this amount is a Liability on the balance sheet, representing the amount of money the contractor still owes for the project.

Retainage becomes Accounts Receivable only after the owner’s final approval of the project.

In the meantime, the project owner records the retainage amount as Retainage Payable and the rest of the contract value as Accounts Payable.

Read more on retainage management in construction accounting.

What Does Retainage Mean for Contractors?

Though contractors receive the retainage only after the project’s completion, they still need to pay their employees and suppliers for the work.

As construction companies usually operate with small margins, a poorly chosen retainage amount can significantly strain their working capital and cash flow.

Depending on the project, a 5-10% retainage rate can account for 25-50% of the contractor’s revenue. This amount is tied up and not available to pay for the project costs.

This can cause serious financial problems for the contractor, especially if the project is large and takes several months or even years to complete. To avoid these issues, it is crucial for contractors to carefully consider the retainage rate before starting a project.

Specialized Construction Billing 

Sometimes, contractors choose specialized billing methods such as Fixed Price, Time and Material, AIA Progress Billing and Cost-Plus. Let’s discuss each in detail.

Fixed Price Contracts

In fixed-price contracts, contractors estimate the total cost of the project in advance and agree to complete the project for a fixed price (hard bid).

The main advantage of this billing method is that it provides predictability and stability for contractors and owners. Contractors know precisely how much revenue they will receive from the project, while owners can be sure that the project’s total cost will not exceed the agreed-upon amount.

However, fixed contracts with hard bids also increase the risk for contractors. If the project turns out more complex than initially anticipated or if there are any unforeseen delays, the contractor may have to bear the extra costs.

That’s why some fixed-price contracts are negotiable. They include contingencies that allow for flexibility in case the project scope changes or there are unforeseen problems.

Time and Material Contracts

Time and material contracts are for projects with high levels of uncertainty. In this type of billing, the contractor charges the owner for the actual hours worked by its employees and the materials used.

If you opt for this type of construction billing, Buildern can help you track employee hours and project expenses to bill your customer accurately.

To do that, include the material units and labor hours in your client invoices so that clients can see the spent resources and their owed payment. 

Creating construction invoice online

Invoicing the time and materials with Buildern

AIA Progress Billing

AIA progress billing is another type of construction billing based on the work completed. The contractor submits regular invoices to the owner detailing the progress made on the project and the related costs.

So, in AIA Progress Billing Method, contractors get the payment for their work during the billing period, usually a month.

This method requires clear documentation. It needs an application for payment, which includes a signed summary sheet and a schedule of values showing what was completed to date.

Cost-Plus Contracts 

A cost-plus contract is a construction contract where the contractor is reimbursed for their actual costs plus an agreed-upon fee. This fee is typically a percentage of the total costs (10-20% of the total contract cost) and is helps to cover the contractor’s overhead and profit.

In this type of contract, it is essential to understand what costs will be included in the reimbursement clearly. For example, will the client reimburse for materials, labor, equipment rental, or other indirect costs? There should also be a clear understanding of which factors form the additional fee (e.g., as a percentage of total costs).

Cost-plus is one of the most common construction contracts, particularly for larger projects. It is suitable for both public and private sector projects.

Construction Payroll

Payroll is the combination of all the money an employer pays its employees in exchange for their work. Beyond just wages, payroll also includes benefits paid to construction workers and payroll taxes.

Here are the main payroll components construction accounting should take into account.

Prevailing Wage

Prevailing wage is the hourly wage, usual benefits and overtime pay required by law to be paid to workers on certain federally funded or assisted construction projects.

The Davis-Bacon Act requires contractors and subcontractors performing work on federal or federally assisted construction contracts to pay their laborers and mechanics not less than the wages prevailing in the locality as determined by the Secretary of Labor.

Therefore, contractors must certify their project compliance using certified payroll reports.

Read the rest of the Davis-Bacon and Related Acts 

*Payroll reports vary in different states. The same employee can be eligible for different benefits depending on the type of work they are doing.

Prevailing Wage Adjusted to Union Scale

Union payrolls require contractors to consider prevailing wage and employee benefits according to the local union contract.

There is a corresponding union scale for each job that outlines the hourly wages and benefits for each position. To avoid paying penalties, contractors need to make sure they comply with the union contract.

Simply put, employees should get all the benefits that their local union determines for them.

Multi-Union Payrolls

If an employee lives in one state and works in another, the contractor may need to consider different union contracts.

For example, if an employee lives in New York but works on a Pennsylvania project, the contractor must comply with both states’ requirements.

This is where things can get complex for contractors. They need to keep track of all the work hours in each state and make sure they are paying the correct amount to their employees.

Avoiding Double Taxation

Contractors work on different job sites simultaneously, meaning their workers may live in one state but work in another. This can create a problem of double taxation for contractors, as they need to withhold taxes for both states.

Fortunately, there are steps contractors can take to avoid paying double taxes. To do that, they must fill a non-resident tax return in the other state.

Another way to avoid double taxation is to get a reciprocal agreement between the two states. This type of agreement allows employees who work in one state but live in another to only pay taxes in their state of residence.

Construction Accounting Up Close: Key Steps 

  1. Choose an Accounting Method

    The two key options construction accountants have are cash accounting and accrual accounting.

    Cash accounting is a simpler method where you only record transactions when money actually changes hands.

    Accrual accounting is a more complex method that records transactions when they occur, regardless of when the money changes hands.

    Since there is typically a lag between when work is performed and when invoices are paid, accrual accounting provides a more accurate picture of your company’s financial health. This is especially true for large companies with long project timelines.

    Cash accounting is preferable for small companies, as it requires less bookkeeping and invoices are paid relatively quickly.

  2. Get a Business Bank Account

    One of the mistakes of starting a business is mingling personal and business funds. This makes it difficult to track expenses and can create legal problems down the road. To avoid this, open a business bank account as soon as you start your construction company. All incoming revenue should be deposited into the account, and all business expenses should be paid from it.

    Get a credit card for your business separate from any personal credit card. This will make it easier to track expenses and get business-specific perks like cash back or travel rewards.

  3. Choose Your Software. Try Buildern Now!

    If you need a seamless construction accounting experience, you need to integrate your accounting software with specialized construction management software. In this way, all your data related to the construction project will be in one place and you will not have to juggle multiple pieces of software for seeing the whole picture.

    Which Accounting Software to Choose?

    Xero and QuickBooks are the most popular accounting tools. They are both easy to use and have a wide range of features that allow you to track your finances, create invoices and manage your payroll without deep technical knowledge.

    If you already use one of these tools and have your construction accounting data in it, scroll down to see how you can integrate it with construction project management software with just one click.

    If you’re still in search of good software, read this Xero vs. QuickBooks comparison from Forbes
    to determine which is best for you.

    Which Construction Project Management Software to Choose?

    Once you have all your project data filled in the accounting software, link it to Buildern – a construction industry-specific tool that covers all project stages from design and pre-construction to closeout and final invoicing.

    Why Integrate Quickbooks or Xero with Buildern?

    Construction accounting requires a different approach from traditional accounting as the construction process is non-linear. To avoid cost overruns, you need closer monitoring of job costs, change orders, and subcontractor invoices.

    To do this effectively, you need construction project management software to give you complete visibility into your projects

    Buildern does just that by integrating with leading accounting software like Xero and Quickbooks. A bonus – it’s super easy to do!

    Step 1: Once you have your accounts set up in either tools, choose Account Settings from Buildern and select which accounting platform you want to sync with.

    Step 2: Configure the key settings, such as contract type, payment options, etc.

    Step 3: Sync Cost Codes by either importing them from your accounting software or creating them in Buildern. If you choose an option from Xero to Buildern, all the cost codes predetermined by you in advance will be transferred to Buildern. You can either modify them later or leave them as they are.

    If you choose an option of Buildern to Xero, all the cost codes you create in Buildern will be automatically displayed in Xero.

    Add cost codes to construction software

    Step 4: Finally, sync sub-vendors to track who you’re paying, how much and when.

    You’re all set! Now all your construction accounting data will be available in Buildern. Any activity performed in Buildern will be automatically displayed in your accounting software and vice versa. This way, you will always have an up-to-date view of your finances

  4. Start Tracking Business Transactions

    Now that you have your software set up, it’s time to start tracking transactions. The first step is to connect your bank account so that all your business transactions are automatically imported and categorized. This will save you a lot of time, as you won’t have to manually enter them into the software.

    To have an accurate picture of your business finances, you need to track Accounts Receivable (invoices you have sent to clients but haven’t received payment for yet) and Accounts Payable (bills you have received from vendors but haven’t paid yet).

    You can issue invoices from Buildern or from your accounting software. In both cases, the invoices will be automatically synced, so that you have a complete overview of your receivables anytime. Similarly, you can track bills in both tools.

    The best way to manage construction projects

  5. Have Adjusting Journal Entries

    Adjusting journal entries are entries made at the end of the accounting period to correct errors or omissions in the original journal entries. Simply put, adjusting entries are used to bring the books up-to-date so that the financial statements accurately reflect the current state of affairs.

    For example, if you forgot to record a supplier invoice in your Accounts Payable, you would make an adjusting entry to add it to the software. This way, all your transactions will be accounted for and you can be confident your financial reports are accurate.

  6. Generate Financial Statements

    The summary of your business activities is called a financial statement. The most important ones for construction companies are the balance sheet, income statement and cash flow statement.
    The balance sheet shows your company’s assets, liabilities and equity at a specific point in time. It’s a snapshot of your company’s financial health.

    The income statement shows your company’s revenue and expenses over a period of time,  typically one year. It’s also called the profit and loss statement.

    The cash flow statement shows the inflows and outflows of cash over a period of time. This is important because it shows whether your company has enough cash to cover its expenses.
    Your accounting software can generate these financial statements for you with a single click. You can get a summary of all your previously recorded data or generate a report for a specific period of time – all without manual entry or calculation.

    Reports should be carefully analyzed to help you make sound business decisions. For example, if you’re planning to expand your business, the cash flow statement will show you whether you have enough cash on hand to finance the expansion.

  7. Pay Taxes

    Exploring the tax legislation of the country of your operations is crucial, because though construction approaches and practices are pretty similar everywhere, taxation and similar procedures may largely very in different countries.

    Construction Taxes in The USA

    Construction companies are taxed differently in the United States. Explore the IRS website and contact a tax professional to make sure you’re paying the correct amount of taxes.
    Some states tax construction companies when purchasing materials and equipment, while other states tax a company’s gross receipts.

    Income tax is usually calculated based on the company’s net income – that is, revenue minus expenses. But there are different tax rates for different types of companies, so make sure you’re using the right one.

    Once you’ve determined how much taxes you owe, you can pay them online.

    Construction Taxes in Australia

    Construction taxes in Australia are regulated by GST (Goods and Services Tax) – Australian Taxation Office. Companies that provide building and construction services must lodge a Taxable Payments Annual Report (TPAR) by August 28 each year. 


Here we are, with the comprehensive guide to construction accounting. This guide will help you set up your own construction accounting system and will make sure you are tracking all the important aspects of your business finances.

Integrating accounting and construction project management software into one solution will save you even more time and effort. Not only will you have a complete overview of your finances, you’ll also be able to track project progress and profitability.

Try Buildern today and see how easy construction accounting can be!

Free construction project management software online