March 31 is coming. Not the end of the financial year - that's June. March 31 is the end of the FBT year, and for Perth builders running company vehicles, providing tools, shouting the crew Friday lunches, or paying for anything that even slightly benefits an employee outside of their salary, it's the date that matters.
Fringe Benefits Tax is the tax most builders don't think about until their accountant sends a bill that makes their eyes water. A single company dual cab with unrestricted private use can generate an FBT liability north of $15,000 a year. Multiply that across a fleet and it's real money walking out the door.
The good news: with three weeks of focused effort before March 31, you can legitimately reduce that bill by thousands. This post gives you the week-by-week action plan to do exactly that.
What Is FBT and Why Should Perth Builders Care?
Fringe Benefits Tax is a tax paid by the employer (your company) on the value of non-cash benefits you provide to employees. It's separate from income tax. The employee doesn't pay it - you do. And the rate is brutal: 47%, matching the top marginal income tax rate plus the 2% Medicare levy.
The FBT year runs from 1 April to 31 March - not 1 July to 30 June like the income tax year. This catches a lot of builders off guard. You're focused on year-end tax planning for June, and FBT sneaks up in March when you're still mid-build season.
Quick FBT maths: FBT rate 47% (unchanged for the FBT year ending 31 March 2026). Type 1 gross-up rate: 2.0802 (GST-creditable benefits). Type 2 gross-up rate: 1.8868 (non-GST-creditable). Example: a $10,000 Type 1 benefit costs your company $10,000 × 2.0802 × 47% = $9,777 in FBT. That's almost dollar-for-dollar.
Why Construction Gets Hit Hard
Construction businesses are FBT magnets. Think about what your company provides that isn't pure salary:
- Company vehicles: Every builder has utes and vans. If employees (including you as a working director) can take them home, that's a car fringe benefit - even if the vehicle is covered in mud and full of tools.
- Tools and equipment: Most items provided to employees for work use are exempt. But there are limits and conditions.
- Entertainment: Friday afternoon beers, Christmas parties, client lunches. All potentially FBT-liable.
- Living-away-from-home allowances: Sending workers to remote sites or FIFO arrangements involves LAFHA - which has its own FBT rules.
- Employee phones and laptops: Generally exempt as work-related items, but only if they're primarily for work.
The ATO has flagged construction as a priority compliance area for FBT. They know the industry has high vehicle usage, cash-heavy operations, and a culture of informal benefits. If you're not on top of this, you're a sitting target.
Vehicle FBT: The Single Biggest Exposure for Builders
Let's deal with the elephant in the room. For most Perth builders, vehicles are 80% or more of their total FBT liability. There are two methods for calculating car fringe benefits, and which one you use makes a massive difference.
Method 1: Statutory Formula
This is the simple method. The taxable value is 20% of the car's base value (original cost including GST), regardless of how many private kilometres are driven.
Example - HiLux SR5: base value $72,000 × 20% statutory fraction, available for private use all year, no employee contribution → taxable value $14,400 → grossed up (× 2.0802) to $29,955 → FBT payable at 47% = $14,079. That's the tax on a ute that spends 90% of its life on building sites - which is why the operating cost method exists.
Method 2: Operating Cost (Logbook)
The operating cost method lets you reduce the FBT liability by proving what percentage of use is genuinely business. With a logbook showing 85% business use, the same HiLux looks very different: total operating costs $18,000 × 15% private use → taxable value $2,700 → grossed up to $5,617 → FBT payable = $2,640.
That's a saving of $11,439 per vehicle, per year. Across a fleet of five vehicles, that's $57,195. The logbook is the single most valuable FBT document your business can have.
Logbook Requirements - Get This Right
- Minimum 12 continuous weeks. The logbook must cover at least 12 consecutive weeks, representative of typical use.
- Every trip recorded. Each journey must show: date, odometer start and end, kilometres travelled, purpose of the trip, and whether it was business or private.
- Valid for 5 years. Once completed, a logbook is valid for 5 FBT years, as long as your usage pattern hasn't materially changed.
- Odometer readings on 31 March. You must record the odometer reading at the start and end of each FBT year (1 April and 31 March). This is non-negotiable.
The Electric Vehicle FBT Exemption: A Game Changer for Builders
Since 1 July 2022, battery electric vehicles (BEVs) and hydrogen fuel cell vehicles that cost less than the luxury car tax threshold are completely exempt from FBT. For the 2025-26 FBT year, that threshold is $91,387 (GST-inclusive).
Let's be clear about what this means: an employee (or working director) can have unlimited private use of a company-owned electric vehicle and pay zero FBT. The same benefit on a diesel HiLux costs $14,079 a year. On an EV: $0.
What Qualifies?
- Battery electric vehicles (BEVs): Fully exempt. Tesla Model Y, BYD Atto 3, Hyundai Ioniq 5, Kia EV6 - all under the $91,387 threshold and fully FBT-free.
- Hydrogen fuel cell vehicles: Also exempt, though very few are available in Australia.
- Plug-in hybrids (PHEVs): No longer exempt from 1 April 2025. If you acquired a PHEV before that date under a binding commitment, it's grandfathered. Otherwise, PHEVs are now fully FBT-liable.
Practical Considerations for Builders
"But I need a ute on site." I hear it every week. And it's a fair point - there aren't many electric utes available in Australia yet. But here's how smart builders are using the EV exemption:
- Site vehicle stays on site. Keep the diesel HiLux or Ranger as a dedicated site vehicle that stays on-site overnight. No private use = no FBT. Park it at the yard or lock it on-site.
- EV as the commuter and personal vehicle. The builder or project manager drives a Tesla Model Y or similar as their daily commuter and personal vehicle. It's company-owned, fully FBT-exempt, and used to get to and from sites, meetings, suppliers, and home.
The numbers speak for themselves. A $65,000 Tesla Model Y: $0 FBT. A $72,000 HiLux SR5 with private use: $14,079 FBT per year. Over a typical 3-year cycle, that's $42,237 saved in FBT alone - before you factor in the fuel savings.
The 3-Week FBT Action Plan
Week 1 (10–14 March): Review
This week is about gathering information and identifying your exposure. Don't try to fix anything yet - just get the full picture.
- List every company vehicle. Make or model, purchase price, who drives it, and whether it goes home at night.
- Check logbook status. For each vehicle, do you have a valid logbook (completed within the last 5 years)?
- Review employee declarations. Have employees signed declarations about private use of vehicles?
- Identify entertainment expenses. Pull a report of all meals, drinks, events, and entertainment paid by the company during the FBT year.
- Check for any other benefits. Loans to employees at below-market rates, gym memberships, school fees, health insurance - anything the company pays that's not salary.
Week 2 (17–21 March): Optimise
- Employee contributions. Employees can make after-tax contributions towards the cost of a fringe benefit, which directly reduces its taxable value. If an employee contributes $3,000 towards the running costs of their company car, that's $3,000 off the taxable value - saving roughly $2,913 in FBT.
- Remove private use. If a vehicle isn't genuinely needed for private use, park it at the yard over the last two weeks of March. Every day a car is not available for private use reduces the statutory formula FBT proportionally.
- Restructure entertainment. Consider whether events qualify as a "minor benefit" (under $300 per employee and provided infrequently). If so, it's FBT-exempt.
- Use the otherwise deductible rule. If an employee would have been able to claim a tax deduction for the expense had they paid for it themselves, the taxable value of the benefit can be reduced. For tools, protective clothing, and work-related items, this is usually a full reduction to nil.
Week 3 (24–31 March): Finalise
- Record all odometer readings on 31 March. Every company vehicle. Photo with timestamp. No exceptions.
- Finalise employee declarations. Every employee with access to a company vehicle signs a declaration confirming private use percentage, or confirming no private use.
- Calculate preliminary FBT liability. Using the information gathered, calculate the approximate FBT for each benefit category.
- Gather receipts for operating costs. If using the operating cost method, you need all running costs: fuel, registration, insurance, servicing, tyres, and depreciation.
- Prepare a summary for your accountant. Don't dump a shoebox of receipts on their desk. Provide a clear schedule: vehicle list, logbook status, odometer readings, employee declarations, and a categorised list of other benefits.
Common FBT Mistakes Perth Builders Make
Mistake 1: "It's a Work Ute - No FBT"
Wrong. There is no blanket exemption for utes in the FBT rules. A dual-cab ute that can carry less than one tonne (payload, not GVM) and has a seating capacity of fewer than 9 is classified as a "car" for FBT purposes. That covers almost every HiLux, Ranger, Navara, and Triton on the market in dual-cab form.
The only vehicles with a genuine FBT exemption are those classified as "commercial vehicles" under the FBT Act - single-cab utes with a payload over one tonne, panel vans, and vehicles primarily designed to carry goods. And even then, the exemption only applies if private use is limited to home-to-work travel and minor, infrequent personal use.
Mistake 2: No Logbook
Without a valid logbook, you cannot use the operating cost method. You're locked into the 20% statutory formula, which almost always produces a higher FBT bill. We showed the difference earlier: $14,079 vs $2,640 on a single vehicle. If you don't have a logbook for your fleet, start one on 1 April this year - 12 weeks of recording and you're set for the next 5 years.
Mistake 3: Forgetting Odometer Readings
You can have the best logbook in the world, but if you don't have opening and closing odometer readings for the FBT year, the ATO will not accept the operating cost method. Set a calendar reminder for 31 March and 1 April every year. It takes 30 seconds per vehicle and saves thousands.
Mistake 4: Not Reporting "Informal" Benefits
The Christmas party. The Friday beers. The boss paying for an employee's parking at the city office. The apprentice's phone bill. These are all fringe benefits. The fact that they're informal, small, or culturally expected doesn't make them exempt. Many of these will qualify as exempt minor benefits (under $300 and infrequent), but you still need to identify them, document them, and apply the exemption properly.
Mistake 5: Confusing FBT Year with Income Tax Year
The FBT year ends 31 March. The income tax year ends 30 June. They are different periods. Benefits provided in April, May, and June belong to the next FBT year, not the current income tax year. This confusion leads to benefits being reported in the wrong period, or missed entirely.
Setting Up for Next FBT Year: Strategies That Save from Day One
Start Logbooks on 1 April
If any vehicle in your fleet doesn't have a current logbook, start one on 1 April 2026. Run it for 12 weeks. Use an app - there are several ATO-compliant logbook apps (TripLog, Driversnote, GOFAR) that record trips automatically using GPS. The days of handwriting logbooks in the glovebox are over.
Implement a Vehicle Use Policy
Put a written policy in place for all company vehicles. The policy should cover: who can drive them, whether private use is permitted, what "private use" means, and the consequences for non-compliance. Where private use is not permitted, require vehicles to be parked at the company yard overnight.
Consider Salary Packaging
For senior employees and working directors, salary packaging a vehicle can be a tax-effective strategy. The employee sacrifices part of their pre-tax salary in exchange for the benefit of a company vehicle. When the operating cost method is used and business use is high, the combined tax outcome can be significantly better than the employee buying the vehicle with after-tax dollars.
And if the packaged vehicle is an FBT-exempt EV, the employee gets the vehicle essentially tax-free - no FBT for the employer, no personal tax for the employee on the salary sacrifice amount. It's the most tax-effective vehicle arrangement currently available in Australia.
Quarterly FBT Reviews
Don't wait until March. Review your FBT position at the end of each quarter (June, September, December, March). Check that logbooks are being maintained, odometer readings are recorded, and any new benefits are identified. A 30-minute quarterly review prevents the annual March panic.
Key FBT Dates for 2026
- 31 March 2026 - FBT year ends. Record all odometer readings. Finalise employee declarations and contributions.
- 1 April 2026 - New FBT year begins. Start any new logbooks. Record opening odometer readings.
- 21 May 2026 - FBT return due (paper lodgement). Payment due.
- 25 June 2026 - FBT return due (electronic lodgement via tax agent). Payment due.
- 28 July 2026 - Q1 FBT instalment due (if liable for quarterly instalments - i.e., prior year FBT was $3,000+).
The Bottom Line
FBT is the tax that rewards preparation and punishes procrastination. The builders who pay the least FBT aren't the ones with the cleverest accountants - they're the ones with current logbooks, signed declarations, odometer readings recorded on time, and a clear policy on vehicle use.
Three weeks of effort now - before 31 March - can save your business five figures in FBT. Over a fleet, over several years, that compounds into serious money. Money you could spend on another apprentice, better equipment, or your own back pocket.
If you're reading this and your first thought is "I don't even know where to start," start with the Week 1 checklist. Just get the list of vehicles and benefits on paper. The rest follows.
Disclaimer: This blog post is general information only and does not constitute tax, legal, or financial advice. FBT rules are complex and fact-specific. Always consult a qualified tax professional before acting on any information in this article. Rates and thresholds are for the FBT year ending 31 March 2026 and may change.