Key Highlights

  • The ATO has updated its zone or overseas forces tax offset calculator for Tax Time 2026.
  • The offset depends on where you live, not where you work.
  • The 183-day test helps determine whether you qualify for the offset.
  • Factors such as being a single parent can change the amount you receive.

If your home is in a remote part of Australia, there is a tax offset on your 2025–26 return that is easy to miss and easy to get wrong. The ATO says it has updated its zone or overseas forces tax offset calculator for Tax Time 2026 to make it easier to use and help prevent errors. With many returns still being prepared through tax agents after the 2 November deadline for self-preparers, the change lands at a useful time.

The zone tax offset is worth $338 a year for a Zone A resident, $57 for Zone B and $1,173 for a special area, before any extra amount for dependants.

What has changed in the calculator

The ATO's "What's new for individuals" page, updated on 2 July 2026, says: "From Tax Time 2026, the zone or overseas forces tax offset calculator will be updated to make it easier to use" and "to help prevent errors".

It lists three changes:

  • Location search: "You can now search for eligible locations directly in the calculator."
  • Entering dates and days: you can enter dates or day counts for each location you lived in.
  • Simpler adjusted Taxable Income inputs: it is simpler to enter a dependant's adjusted taxable income, which affects the extra amount you can claim for dependants.

The location search matters because eligibility turns on the exact place you lived. Previously, people had to check the ATO's Australian zone list separately to see whether their town was in Zone A, Zone B or a special area.

The rules themselves have not changed. The calculator is ATO guidance and a tool, not new law.

Who can claim: it's where you live, not where you work

The ATO's guidance is direct: "We base your eligibility on your usual place of residence."

That means working in a remote area is not enough. The ATO's 2026 instructions give the example of an engineer who lives in Brisbane and works at a Zone B mine in Blackall. He cannot claim, because his usual residence is not in a zone.

By contrast, the ATO describes a worker who lives in Darwin, which is in Zone A, and drives to a Zone A mine in Kununurra for shifts before returning home. She can claim, because her usual home is in a zone.

This is the fly-in fly-out rule that has applied since 1 July 2015.

The 183-day test

You generally need your usual place of residence to be in a zone for 183 days or more in the income year. The days do not have to be continuous.

There is an alternative for people who move. The ATO says you can count 183 days across 1 July 2024 to 30 June 2026, as long as at least one of those days falls in 2025–26 and you could not claim a zone offset for 2024–25.

The new ability to enter dates or day counts for each location is designed for exactly these part-year situations.

Defence and United Nations force members serving in a specified overseas locality may instead be eligible for the overseas forces offset. You can claim only one offset. If you qualify for both, you claim the larger amount.

How the offset is worked out

The offset is a fixed amount plus a percentage of a further amount that depends on your dependants. According to the ATO's 2026 instructions:

  • Zone A: $338 plus 50%
  • Zone B: $57 plus 20%
  • Special area: $1,173 plus 50%
  • Overseas forces: $338 plus 50%

The extra amount may apply if you maintained a dependent child or student, or were entitled to the invalid and invalid carer tax offset. The ATO's zone page also lists being a single parent among the factors that can change what you receive. A dependant's adjusted taxable income can reduce that extra amount, which is why the calculator now makes that input simpler.

If you received a remote area allowance from Centrelink or the Department of Veterans' Affairs, you reduce the zone offset by that amount.

If you lived in more than one zone or special area during the year, the ATO says you may use the highest fixed amount if you were in that place for 183 days or more.

Like most personal tax offsets, it reduces the tax you owe. It is not paid out on its own if you have no tax to pay.

Hypothetical example: two remote residents

Hypothetical example 1: Jo lives all year in a town listed as Zone A, has no dependants and receives no remote area allowance. Her offset is the fixed amount of $338.

If Jo had instead received a $150 remote area allowance from Centrelink, her offset would be reduced by that amount: $338 − $150 = $188.

Hypothetical example 2: Sam moved to a Zone B town on 1 February 2025 and moved away on 31 August 2025.

  • Days in the zone in 2024–25: February 28, March 31, April 30, May 31 and June 30, a total of 150 days. That is under 183, so Sam could not claim for 2024–25.
  • Days in the zone in 2025–26: July 31 and August 31, a total of 62 days.
  • Combined: 150 + 62 = 212 days across the two years.

Because the combined total is 183 or more, at least one day falls in 2025–26 and Sam could not claim for 2024–25, Sam may be able to claim the Zone B offset of at least $57 on the 2025–26 return, subject to the ATO's full rules.

What to watch

  • If you use a tax agent, your 2025–26 return is generally due under the agent's lodgment program. Agents will need details of any remote residence and the dates involved.
  • Self-preparers who lodged by 2 November and missed the offset can generally request an amendment.
  • Claim it in myTax at "Zone or overseas forces", or at question T4 on the supplementary return.
  • Keep records of the dates you lived at each address in case the ATO asks.