IT working-from-home deductions: the two methods

Most of an IT career now happens somewhere other than an office. The stand-up over Teams, the on-call laptop on the kitchen bench, the deploy you babysat from the spare room at 9pm: all of it runs your power, your internet and your gear, and the extra it costs is a genuine deduction. Working from home is the core IT claim and also the one the ATO watches hardest, because a single habit turns a clean claim into an audit letter. This chapter is the two methods, the trap that sits between them, and the records that decide whether any of it holds.

The two methods

You claim the additional running costs of working from home one of two ways, and you pick one for the year. The fixed-rate method gives you a set amount for each hour you work at home, a rate the ATO resets each year, so read the current figure off the ATO's working-from-home page rather than carrying last year's over. The actual-cost method claims the real work-related portion of each bill, receipt by receipt. One is less paperwork, the other is often more money, and the rest of this chapter is how to tell which is yours.

What the fixed rate covers, and the double-dip trap

The fixed rate is a bundle. For every hour it buys, it already includes your home and mobile internet and data, your home and mobile phone use, your electricity and gas for heating, cooling and lighting, and your stationery and computer consumables. That coverage is the whole point, and it is also where IT workers come unstuck.

The trap, and the ATO's number-one work-from-home audit target, is claiming your phone or your internet a second time, separately, on top of the fixed rate. You can't. Those bills are already inside the rate, so listing them again is double-dipping. It is one or the other: the fixed rate with phone and internet baked in, or the actual-cost method where you claim the real apportioned bills. Never both for the same period.

What you can still claim on top of the fixed rate

The fixed rate is not "everything", and treating it that way leaves money behind. Three things sit outside the bundle and stay separately claimable:

• The decline in value of your equipment and furniture. Your laptop, monitor, desk and chair wear out doing the job, and that fall in value is deductible for the work-use portion, alongside the hourly rate.
• Repairs to that gear. Fixing a work monitor or a work chair is a running cost the rate does not cover.
• Cleaning of a dedicated home office. If you have a room set aside for work, the cost of keeping it clean is on top of the rate.

How the decline in value works, and where the $300 line falls for a monitor, a desk or a self-built PC, is its own subject. The equipment chapter covers it.

The records catch that trips people up

This is the part that quietly sinks fixed-rate claims. The rate now needs a record of your actual hours worked from home across the whole year, kept as you go: a timesheet, a roster, a calendar or a diary. An estimate written up at tax time is no longer accepted, and neither is the four-week representative sample that used to be fine. You also need one bill for each expense the rate covers, to show you actually incurred it. And the hours have to be real work: you can't claim for a day where you only checked a roster or your shift times.

So the discipline is small and dull, and it decides everything: log the hours from the first week of the year, every time you sit down to work. The deploys happened; the return only stands if the hours behind them were written down as they went.

The actual-cost method, and when it wins

The actual-cost method claims the work-related portion of each real cost, with receipts and a fair, reasonable basis for the split. Here a four-week representative period for phone and internet is enough to set the work-use percentage. It usually beats the fixed rate for someone working from home full-time in a dedicated room with high energy bills, and it usually loses on effort, because every bill has to be apportioned and kept. The fixed rate suits a hybrid week; actual cost rewards the full-time-at-home setup that is genuinely more expensive to run.

One catch on the split is the same-room point. The running cost you claim is the additional one your work created. If a housemate who is not working is sitting in the same room with you, the light and heat were on for them anyway, so you did not incur an extra running cost there to claim.

The line you cannot cross: occupancy costs

As an employee you cannot claim occupancy costs: rent, mortgage interest, council rates or house insurance. Not a slice of them, not even when you work from home full-time. The only exception is where part of your home is a genuine place of business, and an employee whose home is a convenience rather than their employer's base almost never meets that bar. There is a sting in the tail too: claiming mortgage interest would drag your home into capital gains tax when you sell. This is the top work-from-home myth in IT, so take it plainly: occupancy costs are off the table.

The records that hold it together

A home-work claim rests on two records, and both need to exist before you lodge. The first is the whole-year log of actual hours, which the fixed-rate method lives or dies on and which cannot be reconstructed in July from memory. The second is your bills: one for each running cost the rate covers, or, if you go the actual-cost route, the receipts and usage basis behind every apportioned expense. The way to keep this painless is to capture both as the year runs rather than assembling them at the end. The ATO's free myDeductions app will hold the raw records for you.

The bottom line

Working from home is the biggest deduction in an IT return and the easiest to get wrong. Work out both methods and keep the one that lands higher, log your actual hours from day one, add the decline in value of your gear on top of the fixed rate, and do not claim phone or internet twice. Leave the rent and the mortgage interest out. Do that and the work you take home pays back what it costs, instead of collapsing over a record that was never kept.

General information only, not tax advice. Check the ATO or a registered tax agent for your situation.