Can I claim occupancy expenses like rent, mortgage interest, and council rates?

Generally, no. Employees working from home cannot claim occupancy expenses. Doing so requires proving your home is a place of business (e.g., has a sign outside, is visited by clients), which can trigger Capital Gains Tax (CGT) implications on your main residence when you sell it.

Can my partner and I both claim the 67 cents per hour rate if we work from the same home?

Yes. If you both work from home, you can both claim the 67 cents per hour rate for your respective hours worked. The ATO allows multiple occupants of the same home to claim the rate, provided you each keep independent, compliant records of your hours.

Do I need to keep physical receipts for all my expenses under the fixed rate method?

For the 67c fixed rate method, you do not need receipts for every single utility bill. However, you must keep at least one representative bill (e.g., one electricity bill, one phone bill) from the financial year to prove you actually incurred those running costs.

What happens if I purchase a work asset that costs less than $300?

If you purchase a work-related asset (like a mouse, keyboard, or desk lamp) that costs $300 or less, you can claim an immediate, full deduction for the work-related portion of the cost in the year of purchase, rather than depreciating it over time.

How to Calculate Your WFH Tax Deduction in Australia: A Complete Guide

As remote and hybrid work models solidify into permanent structures across Australia's professional landscape, understanding the tax implications of operating a home office is paramount. For engineers, developers, and STEM professionals, the home office is often a high-tech environment requiring significant energy consumption, high-speed internet, and specialized ergonomic hardware.

The Australian Taxation Office (ATO) provides clear pathways to offset these operational overheads through Work From Home (WFH) tax deductions. However, navigating the transition from the legacy "shortcut method" to the current regulatory framework requires a precise, analytical approach.

This guide breaks down the mathematics behind the two primary deduction methodologies—the Revised Fixed Rate Method and the Actual Cost Method—and demonstrates how to leverage our free WFH Tax Calculator to optimize your annual return.

1. The Revised Fixed Rate Method (67 Cents per Hour)

Effective from 1 July 2022 (affecting the 2022–23 financial year and onwards), the ATO abolished the temporary 80-cents-per-hour "shortcut method" and introduced the Revised Fixed Rate Method at 67 cents per hour.

This rate is designed to simplify the calculation of running expenses by bundling several common costs into a single hourly metric.

What is Included in the 67c Rate?

When you claim the 67 cents per hour rate, you cannot claim separate deductions for the following expenses:

Energy expenses: Electricity and gas associated with lighting, heating, cooling, and powering electronics in your home office.
Telecommunications: Mobile phone plans, home internet connections, and data usage.
Stationery and computer consumables: Printing paper, ink cartridges, pens, and general office stationery.

What Can Be Claimed Separately?

Crucially, the revised fixed rate does not cover everything. You can claim separate, additional deductions for:

Decline in value (depreciation): The wear and tear of depreciating assets used for work, such as laptops, monitors, ergonomic chairs, and desks.
Repairs and maintenance: Costs incurred to repair these depreciating assets.
Cleaning: If you have a dedicated, locked-off home office space, you can claim a portion of professional cleaning costs.

Strict Record-Keeping Requirements

The ATO has tightened compliance. To use the 67c method, you must keep:

A continuous record of actual hours worked: You cannot estimate your hours or use a representative four-week diary. You must record your exact hours via timesheets, rosters, logbooks, or a comprehensive calendar system.
Evidence of expenses: At least one document (such as a utility bill or phone statement) showing you incurred the costs covered by the rate.

2. The Actual Cost Method

For professionals with high-overhead setups—such as software engineers running local server stacks, data scientists executing resource-intensive computations, or hardware developers requiring specialized equipment—the Actual Cost Method often yields a higher deduction.

Instead of a flat hourly rate, this method requires you to calculate the precise dollar amount you spent on work-related activities.

Calculating Apportioned Running Costs

To claim actual costs, you must calculate the work-related portion of every bill. This requires determining either the area of your dedicated workspace relative to your home, or the exact power draw of your equipment.

Heating, Cooling, and Lighting Formula:

$$\text{Cost} = \text{Hourly cost of appliance} \times \text{Annual hours used for work} \times \text{Work-related percentage}$$

Phone and Internet Apportionment:

To claim actual phone and internet costs, you must track your usage over a representative four-week period to determine your work-related usage percentage. For example, if you download 500 GB of data in a month, and your network logs show 350 GB was used for work-related activities (video conferencing, source control, testing), your work-related percentage is 70%.

Calculating Decline in Value (Depreciation)

Assets costing more than $300 cannot be claimed immediately. Instead, their cost must be written down over their effective life using either the Straight-Line (Prime Cost) Method or the Diminishing Value Method.

Prime Cost Formula: $$\text{Annual Depreciation} = \text{Asset Cost} \times \left(\frac{\text{Days Held}}{365}\right) \times \left(\frac{100}{\text{Effective Life}}\right) \times \text{Work Use Percentage}$$
Diminishing Value Formula: $$\text{Annual Depreciation} = \text{Base Value} \times \left(\frac{\text{Days Held}}{365}\right) \times \left(\frac{200}{\text{Effective Life}}\right) \times \text{Work Use Percentage}$$

3. Practical Comparison: Real-World Scenarios

Let us analyze a practical scenario to see how these two methods compare mathematically.

The Profile: Sarah, Senior Systems Architect

Hours Worked WFH: 35 hours per week for 46 weeks = 1,610 hours.
Setup: Dedicated home office. Uses a high-performance workstation, dual 4K monitors, and an ergonomic desk.
Assets Purchased This Year: An ergonomic chair costing $600 (Effective life: 10 years, using Prime Cost method, 90% work-related use).
Monthly Bills: Internet ($100/month, 80% work-related), Mobile ($80/month, 50% work-related).
Calculated Actual Power Cost for Workstation & Lighting: $0.25 per hour of operation.

Calculation A: Revised Fixed Rate Method

Fixed Rate Component: $$1,610\text{ hours} \times $0.67 = $1,078.70$$
Depreciation Component (Ergonomic Chair): $$\text{Depreciation} = $600 \times \left(\frac{365}{365}\right) \times \left(\frac{100}{10}\right) \times 0.90 = $54.00$$
Total Fixed Rate Deduction: $$$1,078.70 + $54.00 = \mathbf{$1,132.70}$$

Note: Under this method, Sarah cannot claim her internet or mobile phone bills separately, as they are bundled into the $0.67 rate.

Calculation B: Actual Cost Method

Electricity running costs (Workstation & Lights): $$1,610\text{ hours} \times $0.25 = $402.50$$
Internet Deduction: $$$100/\text{month} \times 12 \text{ months} \times 80% = $960.00$$
Mobile Phone Deduction: $$$80/\text{month} \times 12 \text{ months} \times 50% = $480.00$$
Depreciation (Ergonomic Chair): $$\text{Depreciation} = $54.00$$
Total Actual Cost Deduction: $$$402.50 + $960.00 + $480.00 + $54.00 = \mathbf{$1,896.50}$$

The Verdict

For Sarah, the Actual Cost Method yields an extra $763.80 in deductions. Because she has a high-tier internet plan and a dedicated workspace with significant power requirements, the actual running costs far exceed the ATO's bundled hourly rate. However, she must ensure she has meticulous records, including itemized ISP bills and a diary showing her work-related internet usage.

4. How to Choose the Right Method for Your Return

Which method is right for you? Use this simple decision matrix:

Factor	Revised Fixed Rate Method (67c)	Actual Cost Method
Record-Keeping Effort	Medium (Requires hourly log, proof of bills)	High (Requires logs, receipts, diaries, calculations)
Best For	Casual remote workers, hybrid workers, low-utility users	Full-time remote workers, high-energy setups, expensive phone/internet plans
Additional Claims Allowed	Yes, asset depreciation only	Yes, all individual running costs and depreciation

To eliminate the guesswork and avoid complex manual calculations, you can use our free Australia WFH Tax Calculator. Input your hours, utility costs, and asset purchases to instantly compare both methods and determine which strategy maximizes your tax return.