How the Work From Home Deduction Calculator Works (With a Worked Example)
Works out a working-from-home deduction using the ATO fixed rate method. This guide walks through what each input means, the formula behind the answer and a worked example using typical Australian figures. You can follow along in the free Work From Home Deduction Calculator.
Why it matters
Australia taxes individuals on a progressive scale, so each extra dollar can be taxed at a different rate from the last. On top of income tax, most residents pay the 2% Medicare levy, and many carry HELP debts that are repaid through the tax system. Employers withhold tax from each pay under PAYG, and the annual tax return squares up the difference.
What you need to enter
The calculator asks for 3 inputs. The table shows each one with the example value used later in this guide.
| Input | Example value |
|---|---|
| Hours worked from home in the year | 800 |
| Fixed rate (cents per hour) | 70 |
| Your marginal tax rate (%) | 32 |
The formula
Deduction = hours worked from home × fixed rate per hour (70 cents from 2024–25). Tax saving = deduction × marginal rate.
Worked example
Entering the example values above gives these results:
| Result | Value |
|---|---|
| Deduction | $560.00 |
| Estimated tax saving | $179.20 |
The headline figure is $560.00 (deduction). Change any input in the calculator and every result updates instantly, so you can test different scenarios side by side.
How the deduction changes with hours worked from home in the year
The table below keeps every other input at the example value and moves only “Hours worked from home in the year” up and down by 10% and 20%. It shows how sensitive the deduction is to that one figure.
| Hours worked from home in the year | Deduction |
|---|---|
| 640 | $448.00 |
| 720 | $504.00 |
| 800 | $560.00 |
| 880 | $616.00 |
| 960 | $672.00 |
At 640 the result is $448.00; at 960 it is $672.00. If a small change in this input moves the answer a lot, it is worth double-checking that figure before you rely on the result.
A practical tip
The fixed rate method needs a record of actual hours for the whole year, such as a timesheet or diary. An estimate from a sample period is not enough.
Keep going
Before relying on the number, read Getting the Most From a Work From Home Deduction Calculator: Tips and Common Errors. You might also find these guides useful:
- Car Expense Deduction Calculator: Formula, Example and What the Result Means
- Using a HELP Debt Repayment Calculator in Australia: A Step-by-Step Guide
- Medicare Levy Calculator Explained for Australians
Frequently asked questions
- Are these results exact?
- They are estimates based on standard resident rates. Your actual tax depends on your full circumstances, offsets and any private health insurance position. The ATO’s own tools or a registered tax agent give a definitive answer.
- Do the calculators work for non-residents?
- No. Non-residents have different rates, no tax-free threshold and no Medicare levy. These calculators assume you are an Australian resident for tax purposes.
- When do tax rates change?
- Rates usually change on 1 July, the start of the Australian financial year. Check the ATO website each July for the current figures.
Run your own numbers in the Work From Home Deduction Calculator.
Open the calculatorGeneral information only. Rates and thresholds change, usually on 1 July. Confirm current figures with the ATO or the relevant authority, and get personal advice for decisions about your situation.