Bookkeeping for HVAC Technicians in Geelong

Running an HVAC business in Geelong means juggling service calls across the Bellarine Peninsula, managing refrigerant inventory, tracking vehicle expenses, and staying on top of licensing requirements. The last thing you want is messy books adding to that pressure.

Whether you're a sole trader installing split systems in Ocean Grove or managing a team servicing commercial units across the Geelong CBD, solid bookkeeping practices directly impact your profitability and cash flow. This guide covers exactly what HVAC technicians need to know about managing their finances in Victoria.

Why HVAC Businesses Need Specialised Bookkeeping

HVAC work creates unique bookkeeping challenges that generic accounting approaches miss. Your business deals with:

• High-value inventory — refrigerant gases, compressors, and units that tie up significant capital
• Variable job costs — each installation or repair uses different materials and labour hours
• Extensive travel — Geelong's spread means substantial vehicle expenses between Torquay, Lara, and everywhere in between
• Seasonal cash flow swings — summer demand for cooling and winter heating calls create revenue peaks and troughs
• Tool and equipment depreciation — vacuum pumps, manifold gauges, and recovery units require proper asset tracking

Getting these elements right means you understand your true profit per job, price accurately, and claim every legitimate deduction under the Income Tax Assessment Act 1997.

Essential Records Every HVAC Technician Must Keep

The ATO requires you to retain business records for five years. For HVAC work, this means maintaining:

• Job sheets and work orders — document labour hours, materials used, and job locations
• Supplier invoices — refrigerant purchases, equipment costs, and parts from local Geelong suppliers
• Vehicle logbooks — if using the logbook method for work vehicle deductions
• Bank statements and payment records — track all income including cash jobs (yes, every single one)
• Employee records — timesheets, pay slips, and super contribution statements under the Superannuation Guarantee (Administration) Act 1992
• ARCTick licence documentation — required for handling refrigerants, with associated training costs being deductible

Using cloud software like Xero makes this dramatically easier. Snap photos of receipts from Reece Plumbing or Tradelink on your phone, and they sync automatically to your accounts.

Job Costing for Profitable HVAC Work

Knowing your true cost per job separates profitable HVAC businesses from those wondering where the money went. Effective job costing tracks:

• Direct labour — actual hours spent on installation or repair
• Materials — refrigerant, copper piping, brackets, electrical components
• Travel time and costs — getting to jobs in Leopold differs from Corio
• Subcontractor costs — if you bring in electrical or plumbing contractors
• Overhead allocation — portion of insurance, vehicle costs, and tool depreciation per job

Set up your Xero tracking categories to separate residential maintenance, commercial installations, and warranty work. This reveals which job types actually make money and which ones you should price higher or avoid entirely.

Vehicle Expenses and the Logbook Method

Your ute or van is essential to HVAC work. The ATO offers two methods for claiming vehicle expenses:

Cents per kilometre method: Claim 85 cents per business kilometre (2025-26 rate), capped at 5,000km annually. Simple, but often leaves money on the table for tradies doing serious mileage.

Logbook method: Track actual expenses (fuel, rego, insurance, servicing, depreciation) and claim the business-use percentage. Requires keeping a logbook for 12 continuous weeks to establish your business percentage, then maintaining it for five years.

For most Geelong HVAC technicians travelling between jobs daily, the logbook method typically delivers larger deductions. If you're doing service calls from Drysdale to Werribee and back, you'll exceed 5,000 business kilometres easily.

Important: Travel from home to your first job and last job to home is generally not deductible. However, if you carry bulky equipment that cannot be stored at work (like recovery units or large tool kits), you may qualify for an exception. Document this properly.

GST Obligations and BAS Lodgement

Under the A New Tax System (Goods and Services Tax) Act 1999, you must register for GST once your annual turnover reaches $75,000. Most established HVAC businesses hit this quickly.

Once registered, you'll need to:

• Charge GST on your services and equipment sales
• Claim input tax credits on business purchases (refrigerant, tools, vehicle expenses)
• Lodge BAS — quarterly for most small businesses, monthly if turnover exceeds $20 million
• Pay net GST to the ATO by the due date

Common BAS mistakes we see from HVAC businesses include:

• Claiming GST on insurance premiums (they're GST-free)
• Missing input tax credits on fuel purchases
• Not claiming GST on interstate purchases that include delivery
• Failing to adjust for private use portions of vehicles

A registered BAS agent ensures your lodgements are accurate and maximises legitimate claims. Under the Tax Agent Services Act 2009, only registered agents can lodge BAS for a fee.

Hiring Employees vs Subcontractors

Growing your HVAC business often means bringing on additional technicians. The classification matters enormously for your bookkeeping and legal obligations.

Employees require:

• PAYG withholding on wages
• Superannuation contributions (11.5%, increasing to 12% from July 2025)
• Workers compensation insurance
• Compliance with the Fair Work Act 2009 including minimum wages, leave entitlements, and termination procedures
• Single Touch Payroll reporting

Genuine contractors:

• Invoice you for completed work
• Manage their own tax and super
• Control how they complete the work
• Provide their own tools (typically)
• Can work for multiple clients

The ATO scrutinises contractor arrangements heavily. If you control when, where, and how someone works, they're likely an employee regardless of what your contract says. Sham contracting attracts significant penalties.

Seasonal Cash Flow Management

Geelong's climate creates predictable HVAC demand patterns. January and February bring split system installations and emergency repairs during heatwaves. Winter sees heating system work spike. Spring and autumn are typically quieter.

Smart cash flow management means:

• Building cash reserves during peak months to cover quieter periods
• Timing major equipment purchases for lower-revenue months to reduce tax
• Scheduling vehicle servicing and tool maintenance during quieter weeks
• Setting aside GST and PAYG in a separate account immediately upon receiving payment
• Using Xero's cash flow forecasting to predict pinch points

We recommend maintaining at least eight weeks of operating expenses in reserve. This covers supplier payments, wages, and overheads during slow periods without emergency borrowing.

What to Do Next

Getting your HVAC bookkeeping sorted doesn't require a complete overhaul. Start with these practical steps:

• Set up a receipt capture system — Xero's mobile app or a dedicated folder in your email works well
• Separate your bank accounts — business transactions should never mix with personal spending
• Create a vehicle logbook — even if you switch to cents per kilometre later, the data is valuable
• Review your job pricing — ensure you're including all costs, not just materials and obvious labour
• Schedule a bookkeeping review — identify gaps before the ATO does

Clean books mean confident quoting, stress-free BAS periods, and clear visibility into which parts of your HVAC business actually generate profit. That's the foundation for sustainable growth in Geelong's competitive trade market.