The Offset That Raises the Effective Tax-Free Point
The tax-free threshold is not where tax actually starts. The low income tax offset reduces the tax calculated on modest incomes, shading out as income rises, which raises the effective tax-free point well above the threshold. For someone of Age Pension age it stacks with the seniors offset and raises it further still.
- The answer: The low income tax offset reduces tax calculated on your taxable income, at a maximum amount that reduces as income rises above a threshold.
- The trap: It is non-refundable. It reduces tax to nil and no further, so someone with no liability gains nothing from it.
- The recommendation: Do not plan around the offset itself. Plan around the effective point at which tax starts, which the offsets together determine.
Where the AI summary above gets this wrong
"You start paying tax once you earn over $18,200."
That's surface-true. Here's what it misses:
- The offsets push the real starting point higher — The low income tax offset reduces tax on modest incomes to nil, so the effective tax-free point is above the threshold — and higher again for someone eligible for the seniors offset.
- It is non-refundable and applied after tax is calculated — It is not a payment and it cannot create a refund on its own. It reduces a liability that has already been worked out.
01 How the offset applies
Tax is calculated on your taxable income at the resident rates, and the low income tax offset is then subtracted from the result. It cannot reduce the liability below zero, and any unused amount is lost rather than refunded.
The maximum amount applies below a threshold and reduces at a set rate for each dollar of income above it, reaching nil at an upper limit. Within that phase-out band the effective marginal rate is higher than the statutory one.
It is applied automatically by the ATO from your return. There is nothing to claim and no election to make, which is why most people never encounter it as a decision.
02 How it interacts with the seniors offset
Someone of Age Pension age may be eligible for both the low income tax offset and the seniors and pensioners tax offset, and they apply together — the second is covered in the SAPTO reference.
The combination is what produces the substantially higher effective tax-free point for retirees, and it is the reason a retiree with a modest assessable income frequently pays nothing at all.
Both shade out, at different rates and from different thresholds, so the effective marginal rate through the phase-out region is higher than the headline rate. That is worth knowing before realising a gain that lands in it.
Shows: the low income tax offset at your income after the shade-out, and the tax left after it is applied. Ignores: the seniors and pensioners tax offset, the Medicare levy and its own low-income reduction, and franking credits.
03 Where it does not help
It cannot reduce the Medicare levy, which has its own separate low-income thresholds and its own reduction. Tax and levy are calculated separately and the offset applies to one of them.
It cannot create a refund. Franking credits can, which is why a retiree with franked dividends and no other income receives money from the ATO while the offsets themselves give them nothing — the distinction is in the franking credits post.
And it does nothing for someone whose income is entirely non-assessable, such as tax-free super pension payments. There is no tax to offset, which is the position most retirees are actually in.
Source: ATO — Medicare levy
The offsets are why the threshold is not the answer to 'when do I start paying tax'. For a retiree the real starting point is considerably higher, and knowing where it sits changes how much you can draw from a taxable account before anything is payable — which is a genuinely useful number and almost nobody has it.
FAQ
What is the Low Income Tax Offset?
A non-refundable offset that reduces the tax calculated on modest taxable incomes, at a maximum amount that shades out as income rises. It is applied automatically and cannot reduce a liability below zero.
Does it stack with the seniors offset?
Yes for someone of Age Pension age who is eligible for both. The combination is what produces the substantially higher effective tax-free point for retirees.
Does the offset reduce the Medicare levy?
No. The levy is calculated separately and has its own low-income thresholds and reduction. The offset applies to income tax only.
Sources
Regulator references
- ATO — Tax rates: Australian resident · Australian Taxation Office · 2026The resident marginal rate scale by income year, excluding the Medicare levy.Last verified: 2026-09-07
- ATO — Simple tax calculator · Australian Taxation Office · 2026The ATO's own calculator for income tax payable on a taxable income figure.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.