Rules Around Working-From-Home Tax Deductions in Australia — What Most People Get Wrong

Why “I work from home so I can claim everything” is wrong

The most common WFH-deduction misconception is also the most expensive: the idea that working from home unlocks a flat ability to claim a fraction of your home costs without much effort. The reality is narrower. The ATO treats WFH expenses for employees as a category of work-related expense, governed by the same general rules that apply to any deduction — there must be a clear connection between the cost and earning your income, and the work-related portion must be reasonably calculated.

That alone rules out a lot of the casual claims people make. Coffee made at home? Not deductible — it’s a personal cost regardless of where you work. Food during work hours? Same answer. Rent? Generally no, not for ordinary employees who happen to work at home some days. The full ATO position is on the working from home expenses page, and it’s worth reading directly rather than relying on what someone said at a barbecue.

What is deductible is real, though. The next sections go through what’s actually claimable, the two methods you can use, and the records that hold up if the ATO asks.

What the ATO actually lets you deduct

Working-from-home expenses, in ATO language, fall into two broad categories: running expenses and occupancy expenses. The split matters because most employees can only claim running expenses, while occupancy expenses are usually off-limits unless your home meets specific criteria.

Running expenses (claimable for most WFH workers)

• Electricity and gas for the work-use portion of your home
• Internet — work-related share of the bill
• Phone — work-related calls and data
• Decline in value (depreciation) of work-related equipment over a defined limit (computer, monitor, chair)
• Repairs and maintenance to work-related equipment
• Stationery and consumables genuinely used for work

Occupancy expenses (mostly NOT claimable for employees)

• Rent
• Mortgage interest
• Council rates
• House insurance premiums
• Land tax

Occupancy expenses are generally only claimable when part of your home is used as a place of business — not just a place where you happen to work. The bar for “place of business” is high (a sole trader running a clinic from home, for example), and even when it’s met, claiming occupancy expenses can trigger capital gains tax on that portion of the home when it’s sold. For most employees, claiming occupancy expenses is a worse deal than not claiming them.

The two methods — fixed rate vs actual cost

The ATO offers two ways to calculate WFH deductions for running expenses. Picking the right one for your situation matters more than people think — they can produce wildly different deduction amounts.

Method 1: The fixed-rate method (simpler)

Under the fixed-rate method, you claim a set amount per hour worked from home. The rate is published by the ATO and changes periodically. The current rate and what it covers sit on the fixed-rate method page.

The fixed-rate method bundles a list of running costs into the hourly rate — typically electricity, gas, internet, phone, and stationery. The advantage: simple to calculate, and you don’t need detailed receipts for each item already covered by the rate. The trade-off: the rate is a one-size-fits-all figure and may understate your actual costs if you have a high-power-consumption home setup.

Method 2: The actual-cost method (more work, sometimes bigger deduction)

The actual-cost method calculates each expense individually based on its actual work-related share. The rules sit on the actual-cost method page.

For each cost, you work out the work-related percentage and claim that share. Electricity is usually calculated based on the wattage of devices used, hours of work, and a reasonable apportionment between work and household use. Internet is often calculated as a percentage of total household use that’s work-related, supported by a representative four-week diary.

The actual-cost method requires more records but can produce a substantially larger deduction for households with high running costs and significant WFH hours. The trade-off is the work involved — many taxpayers find the fixed-rate method nets them more after factoring in the time saved.

You can use only one method per income year, and you have to apply the chosen method consistently. Switching between methods within a year isn’t allowed.

Records the ATO expects you to keep

Records are where most denied claims fall apart. The ATO has specific record-keeping expectations for both methods, and the rules are stricter than most people prepare for. The general framework is on the records you need to keep page.

Records under the fixed-rate method

• An ongoing record of hours actually worked from home — timesheet, diary, work calendar, or rostered-hours log
• At least one bill (or other document) for each running cost the rate covers — proves the cost was incurred
• Records of any expenses you claim separately on top of the rate (e.g., depreciation of work equipment)

Records under the actual-cost method

• Detailed hours record
• Receipts and bills for each expense being claimed
• A representative four-week diary showing how the expense splits between work and personal use
• Calculations showing how you arrived at the work-related percentage

All records must be kept for five years from the date the return is lodged. The ATO’s data-matching capability — touched on in our tax system overview — means it can cross-check claims against employer reports, energy provider data, and similar. Claims that don’t match patterns the ATO expects often trigger a request for substantiation.

The mistakes that trigger ATO attention

Looking at the patterns the ATO flags, a few recurring errors come up year after year. Avoiding them keeps a return clean even under data-matching scrutiny.

1. Claiming the whole bill, not the work portion

The most common mistake. Claiming a full electricity bill or internet bill as WFH expense — without apportioning between work and personal use — is the textbook over-claim. The ATO’s expectation is always the work-related share, never the full amount.

2. No records of hours worked

An “estimate” without supporting records is the second-most-common reason claims get denied at audit. The ATO expects an ongoing log, not a year-end estimate. Reconstructing hours after the fact is allowed in narrow circumstances but rarely accepted as a primary record.

3. Claiming personal items as work expenses

Coffee, food, household furniture used for both work and personal life, ergonomic mats used in shared spaces, and similar grey-area items frequently get claimed and frequently get denied. The “personal in nature” exclusion is broad.

4. Double-dipping with employer reimbursements

If your employer reimburses any WFH expense, you cannot claim a deduction for the same expense. Some employees forget about reimbursements (especially small ones for internet or phone) and accidentally double-claim. The ATO matches against employer data.

5. Mixing methods

You can use one method per year. Some taxpayers try to use the fixed-rate method for some months and actual-cost for others — that’s not allowed and produces messy records that don’t substantiate either method properly.

For people with multiple income sources, the WFH split also needs to align with how income is reported. The multiple-jobs and tax rules have their own complications that interact with WFH claims.

When claiming WFH expenses isn’t worth the effort

Here’s the question nobody asks loudly enough: is the deduction actually worth the work? The answer is sometimes no, and being honest about that saves time without costing money.

The categories where WFH deductions tend not to pay off:

• Workers who only occasionally work from home (a handful of days a year). The deduction value is small; the record-keeping effort is identical.
• Employees whose employer fully reimburses running costs. Reimbursed costs aren’t claimable, and there’s nothing left to deduct.
• People in shared-living arrangements where apportioning costs is genuinely difficult and the resulting figure is small.
• People without records who’d be reconstructing from memory at lodgment time. Better to claim nothing than claim a fragile figure.

For everyone else — regular WFH workers with at least basic records — the deduction is worth claiming, often in the hundreds-to-low-thousands of dollars per year depending on hours and home setup.

For deeper context on how lodgment fits into the tax picture, the who needs to lodge a tax return article covers the broader rules.

Frequently asked questions

Can I claim my rent if I work from home in Australia?

Generally no, not unless your home has a dedicated work area used as a place of business — and even then, claiming rent or mortgage interest can have capital gains tax consequences when you sell. For most employees who simply work from home, rent and mortgage interest aren’t deductible. The ATO treats WFH for employees as expense-claiming, not occupancy-claiming.

What records do I need to keep for working-from-home deductions?

For the fixed-rate method, you need a record of hours worked from home (timesheet, diary, or calendar) and at least one piece of evidence for each running cost (electricity bill, internet bill, etc.). For the actual-cost method, you need detailed records: hours, receipts, and a representative four-week diary showing work-versus-personal split. Records must be kept for five years.

Can I claim my home internet if I use it for work?

Yes, but only the work-related portion. The ATO requires you to apportion between work and personal use. Under the fixed-rate method, internet is one of the running costs the rate already covers, so you can’t double-dip. Under the actual-cost method, you’d calculate the work-use percentage and claim that share of your bill.

The single thing most WFH workers get wrong

Looking across the patterns, the single most expensive mistake WFH workers make isn’t over-claiming or under-claiming — it’s failing to keep records as the year goes on. The deduction itself is straightforward when records exist. Without records, the deduction either gets watered down (because reconstruction from memory is conservative) or gets denied at audit (because the ATO’s standard for substantiation is documents, not estimates).

The fix is genuinely simple. Pick a method at the start of the year, set up a basic hours-tracking habit (a calendar entry for each WFH day works fine), keep one bill from each running-cost category, and update both throughout the year. That’s it. The actual claim at lodgment time then takes minutes, not hours, and substantiates cleanly if the ATO ever asks.

So the practical move, if you’re a regular WFH worker, is to read the ATO’s current rules at the start of each financial year — they shift periodically, especially the fixed rate — and to set up the small records routine before the year starts, not after it ends. The ATO working-from-home page remains the authoritative source for what’s currently allowed.