Zone Tax Offset Calculator
Check whether you actually qualify before any dollar figure appears. The zone tax offset depends on your usual home for 183 days or more in 2026-27, not on your job site or roster.
Zone Tax Offset Calculator 2026-27
Who actually qualifies for the zone tax offset?
Eligibility turns on where you live, not where you work.
You qualify only if your usual place of residence was in a prescribed zone for 183 days or more in the income year. Not your workplace, not your job site, your home. The ATO's own wording removes any doubt about the most common misreading of this rule.
This changed on 1 July 2015. Before that date, FIFO workers could claim the offset based on where they worked, and the belief that this is still the rule is one of the most common incorrect claims in remote industries. The law was amended to tie eligibility to residence, and it has not changed back.
Two narrow situations let you claim on less than 183 days in a single year:
- Your residence in the zone lasted a continuous period of less than 5 years, you could not claim in the first year because it was under 183 days, the combined days across the first and current year exceed 183, the current year includes 1 July, and you resided there the full year in every year between.
- You could not claim in the previous year (under 183 days), the current year is also under 183 days, and the combined days across both years exceed 182.
Outside those two part-year rules, the 183-day test in a single income year is what decides it. Someone who genuinely lives in Karratha, Mount Isa or Port Hedland and works locally can qualify. Someone who lives in Perth, Brisbane or Cairns and flies out to a remote site cannot, regardless of how remote that site is.
What are the zone tax offset amounts for 2026-27?
A fixed dollar amount depending on your zone, current for FY2026-27.
| Zone classification | Fixed amount (2026-27) |
|---|---|
| Zone A | $338 |
| Zone B | $57 |
| Special area (within Zone A or B) | $1,173 |
Source: ATO, Zone tax offset, last updated 8 June 2026. These fixed amounts are subject to legislative indexation and are reviewed annually, so confirm the current figure on the ATO's zone or overseas forces tax offset calculator before you lodge.
How is the zone tax offset calculated?
A fixed amount, plus a percentage of your dependant base, less any allowance you already received.
Total offset = fixed amount + (percentage × base amount) − remote area allowance received. Source: ATO, T4 Zone or overseas forces 2026, Table 3, updated 30 May 2026.
| Zone | Fixed amount | Percentage of base amount |
|---|---|---|
| Zone A | $338 | 50% |
| Zone B | $57 | 20% |
| Special area | $1,173 | 50% |
The base amount is not a fixed dollar figure. It is built up from your dependants, and it is zero if you have none, in which case the fixed amount is your entire offset.
What is the dependant base amount?
These component amounts are the FY2025-26 figures, carried forward because the FY2026-27 instructions are not yet published.
The ATO had not published its 2026-27 tax return instructions as of 28 July 2026, so the dependant amounts below come from the T4 2026 instructions, which apply to FY2025-26. This site is built on FY2026-27 rates everywhere else. Here, the underlying instructions simply do not exist yet, so the honest position is to show the most recent published figures and say so, rather than guess at indexation that has not happened.
| Dependant or circumstance | Base amount (FY2025-26) |
|---|---|
| Each full-time student under 25 | $376 |
| Oldest non-student child under 21 | $376 |
| Each other non-student child under 21 | $282 |
| Sole parent, full income year | $1,607 |
| Sole parent, per day (part year) | $4.40 |
Source: ATO, T4 Zone or overseas forces 2026 (individual supplementary tax return instructions for FY2025-26), Tables 2 and 3, Worksheet 3, updated 30 May 2026. These amounts are indexed periodically. Check the ATO's zone or overseas forces tax offset calculator for any change once the FY2026-27 instructions are released.
Each amount applies in full only while that dependant's adjusted taxable income (ATI) is under $282. Above that, the ATO reduces the amount by $1 for every $4 of ATI over $282 (T4 2026, Worksheet 2). Work through your dependant's ATI against that worksheet if it might apply, since the calculator above only lets you enter a total reduction rather than working out the taper for you.
One more gap worth stating plainly. If you maintain an invalid or invalid carer dependant, the ATO adds a further amount to your base, but that figure is not included here because it needs to be checked against the ATO's Invalid and invalid carer tax offset page directly. Use the ATO's own zone or overseas forces tax offset calculator, which adds it automatically, rather than assuming a figure from this page.
How do I check if my town is in Zone A, Zone B or a special area?
Through the ATO's own list, not a copy on this page.
The ATO maintains the Australian zone list, organised by state and territory rather than as one searchable database. You select your state, then search that state's page for your locality. The list changes, so this calculator links to it rather than embedding a copy that would go stale.
A special area is generally a location more than 250 km by the shortest practicable surface route from the nearest population centre of 2,500 people or more. The ATO says the list is not exhaustive: a location that meets that definition but is not yet listed may still qualify, and the National Library of Australia also holds the underlying zone boundary maps if you need to check a borderline case.
What does the offset look like in practice?
Two examples: one building the offset up, one showing it floor at zero.
Example 1. A person living in Zone A, resident there for 183 days or more, with one dependant (the oldest non-student child, under 21, ATI under $282), and no remote area allowance received: fixed $338 plus 50% of $376 ($188) equals $526. Without that dependant, the offset would be $338 only, so the dependant adds $188.
Example 2. A person living in Zone B, a sole parent for the full income year (base $1,607), who already received $1,000 in Centrelink remote area allowance: fixed $57 plus 20% of $1,607 ($321.40) equals $378.40 before the allowance. Subtract the $1,000 already received and the offset floors at $0. It never goes negative, no matter how large the allowance.
Who actually gets this offset?
Four situations, only some of which qualify.
Locals who live and work there
The clearest case
A resident of Karratha, Mount Isa or Port Hedland who works locally may qualify, subject to the 183-day test. This is the offset working as intended.
Residents who travel out for work
Residence still decides it
Someone who genuinely lives in a zone but travels elsewhere for work is judged on where they live, not where the work happens. This is a different case from FIFO into a zone.
FIFO and DIDO workers
Generally excluded since 2015
A worker who lives in Perth, Brisbane or Cairns and flies or drives to a remote site does not qualify, because their usual place of residence sits outside the zone.
ADF personnel overseas
A separate offset
Members of the Australian Defence Force stationed overseas in a prescribed area claim the overseas forces offset instead, and can only claim one of the two, whichever is greater.
What are the common mistakes with the zone tax offset?
Six errors that lead to a wrong claim or a wrong expectation.
Assuming your work site decides it
The offset follows your home, not your roster. Working inside a zone on FIFO does not make you eligible if you live outside it.
Using an old locality list
The ATO's zone list changes and is not exhaustive. A copy saved from a previous year, or a screenshot, is not the authority.
Claiming both zone and overseas forces offsets
Only one applies per income year, whichever gives the greater amount. Claiming both is not an option.
Forgetting to subtract the allowance
Any Centrelink remote area allowance received reduces the calculated offset. Leaving it out overstates what you can claim.
Treating last year's dependant figures as current
The $376, $282 and $1,607 amounts are FY2025-26. Indexation could move them once the FY2026-27 instructions publish, so check before you lodge.
Not lodging outstanding returns
You must have paid tax on assessable income and lodge a return, including any outstanding prior-year returns, to claim the offset at all.
Zone tax offset FAQ
Common questions about eligibility, amounts and the FIFO exclusion.
Sources
The documents behind every figure on this page.
- ATO, Zone tax offset, last updated 8 June 2026. ato.gov.au, Zone tax offset. Fixed amounts, the 183-day residence test, the FIFO exclusion and the overseas forces exclusivity rule.
- ATO, T4 Zone or overseas forces 2026 (individual supplementary tax return instructions for FY2025-26), updated 30 May 2026. Tables 2 and 3, Worksheets 2 and 3: dependant base amounts, percentages and the ATI reduction rule.
- ATO, Australian zone list, last updated 1 July 2026. ato.gov.au, Australian zone list. State-by-state locality boundaries and the special area definition.
- ATO, Zone or overseas forces tax offset calculator. ato.gov.au, Zone or overseas forces tax offset calculator.
- National Library of Australia, Zone boundaries maps. catalogue.nla.gov.au.
The zone fixed amounts are FY2026-27. The dependant base amounts are FY2025-26, the most recent published by the ATO as of 28 July 2026. Remote area allowance and invalid/invalid carer offset amounts are not asserted here and must be checked directly. Last verified 28 July 2026.
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