Tax Deductions for Self-Lodgers in 2026–27

Plenty of Australians quietly do their own tax return every year and never mention it. If your affairs are simple, self-lodging is a legitimate and free option, and it doesn't automatically mean you miss out on deductions. What it does mean is that the record keeping and the claiming are on you, not on someone else's checklist.

This guide walks through what self-lodging involves, where deductions usually hide for people who rent out a room or part of their home, and the habits that make a self-prepared return stand up if the ATO ever asks a question. It's general information, not tax advice, and I'm not a registered tax agent. Anything specific to your situation should be checked against the ATO's own guidance or with a professional.

What self-lodging actually means

Self-lodgment means you prepare and submit your own tax return using the ATO's online services, typically through myGov. Most Australians are eligible to do this, and Moneysmart points people to myTax as the free online way to lodge.

The ATO's own framing is fairly blunt about who this suits. If you're an individual or a sole trader with a genuinely simple situation, lodging it yourself through ATO Online Services is a real option. The word doing the heavy lifting there is simple. One job, one or two deductions, no complicated investments, no business structure questions. Once your situation stops being simple, the calculus shifts.

There's also a timing myth worth killing off. The ATO's own advice to first-time lodgers is not to rush in on 1 July. Their guidance is that you should lodge only once your information is pre-filled and your tax amount is ready. Lodging early with half your income showing is how people end up amending returns later.

Why the pre-fill wait matters for your deductions

Waiting for pre-fill isn't just about the income side, though that's the obvious benefit. Pre-filled data gives you a cross-check. If your employer, bank or health fund has reported something to the ATO, it should show up in your return, and a return that doesn't match the data the ATO already holds is the kind of mismatch that triggers a please explain letter.

Use the waiting period productively. That's the window to gather receipts, sort out which expenses were work related, and work out what share of your home costs relate to renting out space. The return itself takes an hour. The evidence behind it takes longer. Most of the pain people associate with tax time is really record-keeping pain that got deferred to October.

The record keeping that holds a self-prepared return together

Every deduction you claim has to be something you can back up. Moneysmart frames the tax return in three parts: declare your income, claim your deductions, and keep the right records. The third part is the one self-lodgers skip.

• Keep receipts and invoices for anything you intend to claim, not just the big-ticket items.
• Note the connection between the expense and the income it helped produce. A receipt alone doesn't prove the link.
• Keep records long enough to cover the ATO's requirements for the year in question, and keep them in a form you can actually find again.
• Record shared or mixed-use expenses as you go, while you still remember what proportion was what.

The shoebox approach works right up until it doesn't. A photo of a receipt in a folder is worth very little if you can't remember what it was for six months later. Recording the amount, the date, the supplier and the reason at the time of the spend is the whole game.

Deductions if you rent out a room or part of your home

This is where a lot of self-lodgers either overclaim or leave money on the table. The ATO's guidance for renting out all or part of your home sets a clear starting point: you can claim 100% of any expenses that only relate to renting out your home to paying guests, such as fees or commission charged by a platform.

Live-in landlords have a broader set of costs in play. Accounting guidance on live-in landlord deductions lists internet and phone costs, water, power, council rates, and upkeep and repairs as the kind of expenses that come into the picture.

The clean cases are easy. A booking platform's commission relates entirely to the rental, so it's straightforward. The messy middle is anything that serves both you and your guests, like power, water or internet. That's where you need a reasonable, consistent method for working out the share that belongs to the rental, and a note explaining it, rather than a number you've pulled out of the air in October. Work out your approach once, apply it the same way every year, and document it.

Board and lodging is treated differently to rent

Not every arrangement where money changes hands under your roof is a rental arrangement for tax purposes. Board and lodging is treated separately, and the treatment catches people out in both directions.

One accounting explainer on board and lodging arrangements notes that you don't report the amount received as assessable income, but you also won't be able to claim deductions for running the place. That sounds like a free pass until you realise it means no deduction for the extra power, water and food you're providing.

Which category you're in depends on the facts, not on what you call it in a listing. If you're unsure, that's a genuine reason to get a professional opinion before you lodge, because the difference between the two treatments is significant.

Work-related and general deductions for people who do their own return

The ATO's deductions guidance is the place to start for anything outside the rental space. It sets out which expenses you can claim as income tax deductions and how to work out the amount to claim. Read the relevant page for each category you're claiming in rather than working from memory or a social media post.

Two habits make this easier. First, keep work-related expenses physically separate from personal ones, so the split at tax time is obvious rather than reconstructed. Second, if you use something for both work and private purposes, write down the method you use to divide it. A percentage you can explain beats a percentage that sounds right.

Tools help here. Lodgya's trackers are built around exactly this problem, capturing income and expenses with receipts attached as it happens rather than in a panic in October, and generating reports you can either use yourself or hand to an accountant. There are also free calculators on the site if you want to sanity check a figure before you commit to it. It's not a substitute for advice, but it is a substitute for a shoebox.

A pre-lodgment checklist for self-lodgers

1. Confirm your pre-fill is complete and your tax amount is showing before you submit.
2. Check every income source appears, including side income and rental income.
3. Match each deduction to a record you can produce on request.
4. Confirm the split on any mixed-use or shared expense, and note how you calculated it.
5. Check whether your arrangement is a rental or board and lodging before you claim anything.
6. Read the ATO page for each deduction category rather than relying on a summary.
7. Save a copy of the return and the records somewhere you'll still have them next year.

When it's worth paying someone instead

The honest dividing line is complexity, not confidence. A single income source and a handful of straightforward deductions is squarely self-lodger territory. Rental income with shared costs, board and lodging arrangements, a business with GST obligations, or anything involving depreciation of a property will usually cost you more in mistakes than an agent would cost in fees.

There's no rule that says you have to pick one forever. Plenty of people self-lodge for years and only bring in a professional when their circumstances change. What matters is that you know which of those two situations you're actually in this year, rather than defaulting to habit.

Frequently Asked Questions

Can I lodge my own tax return without an accountant?

Yes, in most cases. Self-lodgment means preparing and submitting your own return through the ATO's online services, usually via myGov. Moneysmart points people to myTax for free online lodgment. It suits people with genuinely simple affairs. If you have rental income, business income or anything you're unsure about, consider getting advice before you lodge.

When is the deadline if I lodge my own return?

If you're doing your own tax, Moneysmart notes you have until 31 October to lodge your return. That's the deadline for people lodging themselves, and it differs from the later dates agents typically work to. Don't lodge early just to get it done. The ATO advises waiting until your information is pre-filled and your tax amount is ready.

Can I claim deductions for renting out a room in my home?

The ATO states you can claim 100% of expenses that only relate to renting out your home to paying guests, such as fees or commission charged by a platform. Accounting guidance on live-in landlords also lists internet and phone costs, water, power, council rates, and upkeep and repairs. Mixed costs need a reasonable, documented split between your use and the rental use.

Is money from a boarder treated as rental income?

Not always. Accounting guidance on board and lodging arrangements notes that you don't report the amount received as assessable income, but you also can't claim deductions for running costs. That's a different outcome from renting out part of your home to paying guests. Which treatment applies depends on the arrangement, so confirm your situation with the ATO or a registered tax agent.

How long should I keep my tax records?

Records need to be kept for the period the ATO requires for the relevant year, so check the current requirement rather than guessing. Practically, keep receipts, invoices and notes on how you calculated any split in a form you can retrieve easily. The ATO's record-keeping guidance sets out the detail, and it's worth reading before you file this year's return.

Self-lodging isn't a shortcut, and it isn't a risk in itself. It's a trade: you save the fee and you take on the documentation. Do the documentation properly, check the ATO's pages for anything you're unsure about, and the return you file in October will be one you can stand behind if it's ever reviewed.