A tax offset (sometimes called a "rebate") reduces the tax you owe, dollar-for-dollar. It's different from a tax deduction — a deduction reduces your taxable income before tax is calculated, while an offset reduces the tax bill itself. That makes offsets significantly more valuable per dollar than deductions, especially for lower-income earners.
Australia has around a dozen tax offsets, but two account for most claims: the Low Income Tax Offset (LITO) for low-income earners, and the Seniors and Pensioners Tax Offset (SAPTO) for older Australians on pensions or modest incomes. The calculator above estimates both; the sections below explain the rules and the other offsets you might also be entitled to.
LITO gives up to $700 off your tax bill if your taxable income is below the threshold. The phase-out is gradual:
LITO is automatic — the ATO applies it when you lodge your tax return. You don't need to claim it on a separate form. It's non-refundable, meaning it can reduce your tax to zero but can't generate a refund beyond that.
SAPTO targets Australians who have reached pension age (currently 67) and meet an income test. For 2025-26:
Combined with the standard tax-free threshold ($18,200) and LITO, SAPTO can effectively raise the income at which a single senior starts paying tax to around $34,919. For a couple, each can earn around $30,994 before income tax kicks in. SAPTO is also non-refundable.
28-year-old, taxable income $42,000.
Income is below the $45,000 threshold, so LITO is at maximum: $700. Not yet pension age, so no SAPTO. Total offsets: $700. This reduces tax payable by $700.
35-year-old, taxable income $55,000.
Income is above $45,000 by $10,000. LITO reduction = $10,000 × 5% = $500. LITO payable = $700 - $500 = $200. Not eligible for SAPTO. Total offset: $200.
68-year-old single retiree, taxable income $30,000.
LITO at max because income below $37,500: $700. SAPTO at max because below the single threshold of $32,279: $2,230. Total offsets: $2,930. Combined with the $18,200 tax-free threshold, this retiree pays effectively zero tax on $30,000 of income.
PAYG withholding — the tax your employer takes from each pay packet — doesn't factor in non-refundable offsets like LITO or SAPTO. Those are applied at year-end when you lodge your tax return. So most low-income earners eligible for LITO will see it as part of their refund rather than reduced tax during the year.
If you'd rather have the cashflow during the year, you can lodge a PAYG Withholding Variation form with the ATO to reduce ongoing withholdings. This is particularly useful for retirees with predictable, low taxable incomes — getting their SAPTO benefit fortnightly rather than once a year.
For your specific tax situation and offsets, consult a registered tax agent or use the ATO's online tools at ato.gov.au. This calculator is a directional estimate, not tax advice.
This calculator uses current published rates from Australian government and regulator sources. The result is an estimate for general guidance — it does not constitute personal financial advice. For decisions about your circumstances, consult a registered financial adviser, tax agent, or other professional. See editorial standards for how DecisionLab sources and updates its calculator data.