Best Accounting Software for Builders and Carpenters Australia 2026

Building businesses have more complex accounting needs than most trades — progress claims, retention amounts, subcontractor management, variations and often a mix of fixed-price and cost-plus contracts. Here's what actually works.

Builder Software Comparison 2026

Buildxact for Builders

Buildxact is built specifically for residential builders and renovation contractors. It handles the complete workflow from estimating through to final claim.

Which to Choose

Residential builder doing volume (5+ projects/year): Buildxact — it pays for itself in time saved on estimating and claims management.

Carpenter or small builder (1–2 projects/year): Xero Standard — simpler and cheaper, handles invoicing and BAS well.

Builder with multiple employees: MYOB + Buildxact or Xero + Buildxact — Buildxact for project management, MYOB or Xero for payroll and accounting.

## Managing Progress Claims and Retention in Australian Building Software Progress claims are where most builders struggle with accounting software. The ATO doesn't care about your invoicing system—they care about whether you've recorded income correctly when you're entitled to it, not when the final payment clears. The right software handles this three ways: **Stage-based invoicing** lets you lock in income at each construction milestone. When you complete stage one (foundations, framing, whatever your contract specifies), the software generates a progress claim showing work completed, your claim amount, and retention withheld. This matches your accounting records to your contractual reality. **Retention tracking** is non-negotiable. In building, retention typically runs 5-10% and holds until defects liability expires. Poor software makes you manually track this across spreadsheets. Better solutions show you exactly how much cash is withheld across all jobs, when you'll actually receive it, and forecast your real cash position—not just invoiced amount. **Variation management** stops you from eating costs. When a client requests changes mid-project, the software timestamps the variation, tracks which cost code it applies to, and lets you generate a variation invoice immediately rather than discovering three months later you've absorbed $3,000 in unforeseen costs. The builders we've spoken to use Xero paired with a dedicated construction plugin, or purpose-built platforms like Buildxact that handle this out of the box. The cost of proper software ($40-80/month) is recovered the first time it stops you from misclaiming retention or missing a variation. ## Tax Deductions Builders Actually Miss Australian builders have legitimate deductions that most generic accounting software won't flag. This costs money. **Vehicle expenses**: Track mileage using the ATO's current rate of **88 cents per kilometre**. Your software should have a mileage log that automatically calculates deductions—site visits, material runs, client meetings all count. Don't estimate; log it. The difference between estimated ($2,000/year) and tracked ($4,500/year) is real money. **Home office space**: If you run jobs from home—quoting, scheduling, invoicing—you can claim a proportion of your rent/mortgage, utilities, and internet. The ATO allows either $27.50/week for simplified claims (no records needed) or hourly rate calculations for detailed records. Most builders claim the simplified amount and leave money on the table. **Tool depreciation and write-offs**: Until 30 June 2026, you can claim a **$20,000 instant asset write-off** for eligible tools and equipment. A new drill press, scaffolding, safety equipment—claim it in full in the year of purchase. After July 2026, you'll go back to depreciation. Your accountant should know this; your software might not flag it. **Superannuation contributions**: You're required to pay **11.5% superannuation guarantee** on employee wages. You can also salary sacrifice up to the concessional contribution cap (currently $30,000/year for most builders). Software should track this separately so you don't accidentally claim super twice. **Subcontractor management**: When you pay subbies, you must withhold PAYG tax (usually 13.5-15%) and report it. The software needs to track invoices separately from employee wages, calculate withholding correctly, and link it to your tax reporting. Get this wrong and the ATO will find you. ## Feature Comparison: Essential vs. Nice-to-Have | Feature | Why It Matters | Software Priority | |---------|----------------|-------------------| | **Progress claims** | Matches cash flow to contract stages; ATO compliance | **Essential** | | **Retention tracking** | Shows actual cash position, not just invoiced amount | **Essential** | | **PAYG withholding** (subbies) | Legal requirement; affects tax reporting | **Essential** | | **Vehicle expense logging** | Captures 88c/km deductions automatically | **High** | | **Project costing** | Compares estimated vs. actual spend per job | **High** | | **GST separation** | Tracks GST-free work separately (e.g., residential) | **High** | | **Mobile site invoicing** | Generate invoices on-site, no double-entry | **Medium** | | **Time tracking** (hourly work) | Allocates labour costs to correct jobs | **Medium** | | **Inventory management** | Tracks materials stored on-site or in van | **Low** (unless you sell products) | | **CRM integration** | Links job pipeline to accounting | **Low** | ## Frequently Asked Questions ## Managing Progress Claims and Retention in Australian Building Contracts Progress claims are the lifeblood of building businesses in Australia, yet they're often where cash flow problems begin. The difference between invoicing a service and submitting a progress claim comes down to contract terms, retention amounts, and variation management—and your accounting software needs to handle all three seamlessly. When you're working under a standard Australian construction contract (whether it's AS4000-1997 or a custom agreement), you'll typically face retention clauses where the principal or head contractor withholds 5-10% of each claim. This retention amount gets released at practical completion, sometimes with a final holdback period. If your accounting system treats every invoice the same way, you'll quickly find yourself with serious cash flow headaches. The best accounting software for builders handles progress claims differently from standard invoices. Tradify is specifically built for this scenario. It lets you create progress claims that automatically calculate retention, track variations, and flag when work has been completed but payment hasn't been received. You can set retention percentages at the job level, and the system will show your true cash position—not just your invoice total. Beyond retention, variations are where builders lose money. A client requests additional works, you agree verbally, and three months later you're chasing payment for $8,000 in extra concrete pours that never made it onto the original quote. Modern accounting software integrates variation tracking directly into your invoicing workflow. You can create variation orders within the system, link them to specific progress claims, and ensure they're tracked separately from the base contract price. The ATO expects builders to have detailed records of all contract variations, especially for jobs over $20,000 (relevant for the $20k instant asset write-off to June 2026). Your accounting software should automatically timestamp when variations were created, approved, and invoiced—this documentation is essential if you're ever audited. Another critical feature: subcontractor management within accounting software. If you're engaging subbies on a $500k project, you need to track their invoices against your progress claims to the client. If you've claimed for their work but haven't paid them yet, that's a cash timing issue your software should flag. Xero integrates well with subcontractor management tools, allowing you to see payables against receivables by project. ## Tax Deductions Every Australian Builder Should Know About Builders have access to specific tax deductions that most trades miss. Your accounting software needs to be configured properly to capture these, otherwise you're leaving money on the ATO's table. **Vehicle and plant deductions** are the big one. As of 2025-26, you can claim 88c per kilometre for genuine work-related vehicle use. However, builders often own expensive equipment—concrete mixers, scaffolding, power tools—that qualify for depreciation under the plant and machinery rules. The $20k instant asset write-off (available until 30 June 2026 for small businesses with turnover under $10 million) means if you purchase a new truck, excavator, or compressor, you can claim the full cost immediately rather than depreciate it over five years. Your accounting software should have a fixed asset register that tracks depreciation methods. Some software defaults to straight-line depreciation, which is fine for most items, but construction plant sometimes qualifies for diminishing value depreciation, which gives you larger deductions in early years. Before you buy expensive equipment, check with your accountant whether to use the instant asset write-off or claim depreciation—sometimes it's better to spread the deduction across years if your income is lower in certain periods. **Home office deductions** are legitimate for builders who run admin from home, but they need to be calculated correctly. You can claim either a fixed rate (currently 67 cents per hour worked from home) or work out actual costs (rent, utilities, internet). If you're using your home office to manage quotes, invoices, and scheduling, keep records of how many hours weekly you work from there. **Superannuation contributions** are worth optimising. The superannuation guarantee rate for 2025-26 is 11.5%, but you can also make personal contributions up to the $30,000 concessional cap. If you've had a good year, contributing the extra to super reduces your taxable income. Self-managed super funds (SMSFs) can be useful for builders who own significant plant and equipment, as the fund can hold the assets and depreciate them—but this is complex and requires professional advice. Your accounting software should integrate with your BAS (Business Activity Statement) calculations. Builders are often GST-registered, and if you're working on contracts with progress claims, the GST timing matters. Some software automatically handles GST on progress claims vs. actual payment, reducing your compliance headaches. ## Quick Comparison: Feature Checklist for Builder Accounting Software Here's what to look for when evaluating options: - **Progress Claims Management**: Can you create claims with retention percentages and variation tracking? - **Project Costing**: Does the software track actual costs against estimates by job? - **Subcontractor Invoicing**: Can you manage sub invoices and match them to progress claims? - **Plant Register**: Can you track fixed assets with multiple depreciation methods? - **BAS Integration**: Does it automatically calculate GST and other tax obligations? - **Mobile Access**: Can you invoice or record expenses from the job site? - **Bank Feeds**: Does it import transactions automatically to reduce data entry? - **Multi-Currency**: Do you work with overseas clients or suppliers? - **Document Storage**: Can you attach progress photos, contracts, or variation orders? - **Reporting**: Can you generate detailed job profitability reports showing margin by project? - **Integration**: Does it connect with payroll, super, and insurance software? - **Australian Compliance**: Is it updated for current ATO rules and BAS requirements? ## Frequently Asked Questions