Construction accounting guide for small businesses

Published Monday 30 March 2026

Table of contents

• What is construction accounting?
• How construction accounting differs from regular accounting
• Key elements of construction accounting
• Construction accounting methods
• How to set up construction accounting for your business
• Managing cash flow in construction
• Best practices for construction accounting
• Simplify construction accounting with Xero
• FAQs on construction accounting

Key takeaways

• Implement job costing to track all costs separately for each project, which helps you identify which jobs are profitable and make smarter business decisions.
• Choose the percentage of completion accounting method for long-term contracts to recognise revenue proportionally as work progresses, providing the most accurate ongoing view of project profitability.
• Invoice clients at project milestones rather than waiting until completion, and request deposits for major material purchases to maintain healthy cash flow throughout projects.
• Use cloud-based accounting software that supports mobile access so you can track expenses, send invoices, and monitor finances in real time from any job site.

What is construction accounting?

Construction accounting is a special type of bookkeeping designed for the construction industry. Instead of just looking at the whole business, it tracks the financial details of each project separately. This is often called job costing. It helps you see exactly which jobs are making money and which aren't, so you can make smarter decisions and keep your business profitable.

How construction accounting differs from regular accounting

Construction accounting differs from regular business accounting because of project-based work, mobile worksites, and fluctuating workforces. These unique challenges were formally recognised for decades by standards like the now-superseded IAS 11 Construction Contracts.

Project-based accounting

Construction work revolves around individual projects, each with its own budget, timeline, and profit margin. You need to track costs and revenue separately for every job rather than lumping everything together.

Decentralised and mobile worksites

Your team works across multiple locations, often simultaneously. Expenses happen on site, materials move between jobs, and tracking everything requires systems that work wherever you are.

Long-term contracts and progress billing

Construction projects can span months or years. You may bill clients in stages as work progresses, which affects how you recognise revenue and manage cash flow.

Key elements of construction accounting

Construction accounting includes several core components that differ from standard business bookkeeping.

• Job costing: Track all costs associated with each project separately to measure profitability
• Progress billing: Invoice clients at project milestones rather than upon completion
• Retention tracking: Monitor amounts withheld by clients until project completion
• Change order management: Record scope changes and their financial impact
• Equipment tracking: Account for owned and rented equipment costs across projects
• Subcontractor management: Track payments and compliance documentation for all subs

Understanding these elements helps you choose the right accounting methods and software for your business.

Construction accounting methods

Construction businesses use four main accounting methods, each suited to different project types and business sizes.

• Cash basis: Record income when received and expenses when paid. Best for smaller contractors with short-term projects.
• Accrual basis: Record income when earned and expenses when incurred. Provides a more accurate picture of profitability but requires more tracking.
• Completed contract method: Recognise all revenue and expenses when a project finishes. Works well for short projects but can create uneven tax obligations.
• Percentage of completion method: Recognise revenue proportionally as work progresses. This method treats the work as a sale of services over time. It's required for long-term contracts and provides the most accurate ongoing view of project profitability.

Your accountant can help you choose the method that fits your project types and tax situation.

How to set up construction accounting for your business

Setting up construction accounting correctly from the start saves time and supports accuracy as your business grows. Follow these steps to build a solid foundation.

1. Choose your business structure: Select a structure that provides legal protection and fits your tax situation. Options include sole proprietorship, partnership, or limited liability company. Consult an accountant to understand how each affects your finances.
2. Set up a chart of accounts: Create account categories specific to construction, including job costs, materials, labour, equipment, and overhead. This makes it easier to track profitability by project.
3. Select an accounting method: Decide between cash basis, accrual, or percentage of completion accounting based on your project size and tax requirements.
4. Get the right insurance: Construction carries physical and financial risks. Secure liability coverage, workers' compensation, and any industry-specific policies required in your region.
5. Hire accounting support:Bookkeepers handle daily transactions like expenses, bills, and invoices. Accountants advise on tax strategy and business structure. Many construction businesses benefit from both.
6. Use cloud-based accounting software: Choose accounting software that lets you track expenses, send invoices, check your finances from any job site, and update records to keep employee and project information current. You can send invoices immediately after completing work, record costs as they happen, monitor your financial position in real time, and manage your accounts from your phone or tablet.

Staying on top of your accounts weekly keeps records current and makes tax time smoother.

Managing cash flow in construction

In construction, you often pay for materials and labour before receiving payment from clients, making cash flow management essential. Strong cash flow is essential for construction business success. To mitigate risks, accounting standards require that if a project is expected to be unprofitable, the expected loss shall be recognised immediately as an expense.

Here's how to protect your cash flow:

• Invoice regularly: Bill clients at milestones rather than waiting until project completion
• Request deposits: Get payment upfront for major material purchases
• Match expenses to revenue: Avoid paying out more than you've collected on any project
• Monitor client payments: Stay on top of receivables to keep projects moving smoothly
• Build a cash reserve: Keep enough capital to handle any situation with confidence

Use your accounting software to track cash flow by project. This helps you stay informed and make confident decisions about taking on new work.

Best practices for construction accounting

Following these practices helps protect your profitability and keeps tax time smooth.

• Keep personal and business finances separate: Maintain separate accounts to simplify tracking and protect your liability status
• Track costs by project: Job costing helps you identify which projects make money. In fact, accounting rules state that when the outcome cannot be estimated reliably, revenue can only be recognised up to the amount of recoverable costs.
• Invoice promptly: Send invoices quickly to maintain healthy cash flow
• Document change orders: Record scope changes immediately to protect revenue and maintain clear agreements
• Reconcile regularly: Review your accounts weekly to keep records accurate
• Choose the right accounting method: Match your method to your project types and consult an accountant before deciding

Following these practices keeps your finances accurate and your business healthy.

Simplify construction accounting with Xero

Construction accounting can be straightforward. Xero gives you the tools to track job costs, send invoices from site, and monitor cash flow in real time.

With Xero, you can:

• Track project profitability: See which jobs make money and which don't
• Invoice on the go: Send professional invoices from your phone
• Automate bank reconciliation: Match transactions automatically
• Access your accounts anywhere: Check your finances from any device

Ready to simplify your construction accounting? Get one month free.

FAQs on construction accounting

Here are answers to common questions about construction accounting.

What type of accounting is used in construction?

Construction businesses typically use one of four methods: cash basis, accrual basis, completed contract method, or percentage of completion method. The right choice depends on your project size, contract terms, and tax requirements.

How do I record construction expenses?

Record expenses as they occur, categorising them by project and cost type. Use categories like materials, labour, equipment, and subcontractor costs to track profitability for each job.

What's the difference between cash basis and accrual accounting for construction?

Cash basis records income when you receive payment and expenses when you pay them. Accrual records income when you earn it and expenses when you incur them, regardless of when money changes hands.

Do I need specialised construction accounting software?

General accounting software works for many construction businesses, but you need features that support project-based tracking, job costing, and mobile access. Xero offers these capabilities along with integrations for construction-specific apps.

How do construction contracts affect my accounting?

Contract type determines how you recognise revenue. Fixed-price contracts let you use percentage of completion or completed contract methods. Time-and-materials contracts typically use accrual accounting to match costs with billing periods.