FBT Decision Tool

Motorbike FBT Calculator

Should you buy inside or outside the business? Compare the tax outcomes and make the right call.

Step 1

Purchase Details

Enter the motorbike cost and expected running expenses.

$
$5,000 $80,000
$
$0 $10,000
Step 2

Usage & Structure

How will the motorbike be used and how is your business set up?

%
0% (all personal) 100% (all business)
Financing the purchase? No — outright purchase
GST Registered? Yes — Type 1 gross-up applies
Step 3

Personal Tax Rate

Used to estimate the personal tax deduction if the motorbike is purchased outside the business.

Fringe Benefits Tax (FBT) and Motorbikes

Fringe Benefits Tax is a tax paid by employers on certain non-cash benefits provided to employees (or their associates). If a business owns a motorbike and an employee uses it for private purposes, FBT may apply to the private-use portion.

Residual Fringe Benefits

Unlike cars, motorbikes are not classified as "cars" under the FBT Assessment Act 1986. This means the statutory formula and operating cost methods that apply to cars do not apply to motorbikes.

Instead, motorbikes are treated as residual fringe benefits. The taxable value is simply the private-use portion of the total cost to the employer (depreciation + running costs).

The "Otherwise Deductible" Rule

If the employee could have claimed a deduction for the expense had they paid for it themselves, the taxable value of the benefit is reduced accordingly. In practice, this means only the private-use portion attracts FBT.

Key Numbers (2024–25 onwards)

  • FBT rate: 47%
  • Type 1 gross-up factor (GST credits claimed): 2.0802
  • Type 2 gross-up factor (no GST credits): 1.8868
  • FBT year: 1 April to 31 March
  • ATO effective life for motorbikes: 5 years (simplified depreciation)

If the motorbike is used 100% for business, no FBT arises at all.

Why Motorbikes Are Treated Differently

The FBT Assessment Act defines a "car" as a vehicle designed to carry fewer than 9 passengers and less than 1 tonne. Motorbikes don't meet this definition, so they fall outside the car FBT rules entirely.

Cars Motorbikes
FBT classification Car fringe benefit Residual fringe benefit
Statutory formula method Available Not available
Operating cost method Available Not available
Taxable value basis Statutory % of cost or operating cost Private-use % of cost to employer
Logbook required? For operating cost method Recommended to support business %
Car limit applies? Yes ($68,108 for 2023-24) No

This difference often makes motorbikes more tax-effective than cars when business use is high, because the taxable value is directly tied to actual private use rather than a statutory formula.

SCENARIO A — Inside the Business 🏢
Annual depreciation $3,000
GST credit on purchase $1,364
Total deductible expenses $6,000
Tax deduction saving $1,500
FBT taxable value ? Private-use % × (depreciation + running costs). Only the private portion is subject to FBT. $1,800
FBT grossed-up value $3,744
FBT payable $1,760
Effective annual cost $7,260
SCENARIO B — Personal Purchase 👤
Annual cost (depreciation + running) $6,000
Work-related deduction claim $4,200
Tax saving at marginal rate $1,554
No GST credit
No FBT payable
Effective annual cost $4,446
Buy inside the business

Purchasing the motorbike through the business saves you $1,200 per year compared to buying personally.

Inside Personal
$7,260
$4,446
💡

The break-even point is around 55% business use — above this, purchasing inside the business saves you $X per year.

Want to discuss this with your accountant?

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