To find out if both partners are eligible for the Seniors and Pensioners Tax Offset (SAPTO), you must check two main conditions

 To find out if both partners are eligible for the Seniors and Pensioners Tax Offset (SAPTO), you must check two main conditions and calculate your combined rebate income against the Australian Taxation Office (ATO) thresholds. [1, 2]

You can estimate your exact offset using the official ATO Tax Offsets Calculator. [1]

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Step 1: Check the Two Core Eligibility Conditions

Condition 1 (Age or Payment):
• You must have reached the Age Pension age (67 years or older) or received an eligible Australian Government pension, allowance, or Veterans' Affairs payment during the financial year.
• You are ineligible if you were in jail for the entire financial year. [1, 2, 3]
Condition 2 (Rebate Income Thresholds):
• Your combined rebate income as a couple must be below the cut-out threshold.
• For recent income years, the combined rebate income threshold for a couple living together is less than $87,620 (or less than $43,810 per person).
• If you and your spouse have to live apart due to illness or a nursing home, the combined threshold is less than $100,104 (or less than $50,052 per person). [1]

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Step 2: Calculate Your Rebate Income

Your rebate income is generally your taxable income plus certain adjustments (such as reportable fringe benefits, net investment losses, and reportable super contributions) minus any applicable offsets.

To see if both partners fall under the cut-out limit as a couple living together:

Add both of your individual rebate incomes together to get your combined rebate income. [1]
Divide the combined rebate income in half (0.5 × combined amount) to check each partner's share against the per-partner cut-out limit ($43,810). [1] (??)
Both partners are potentially eligible for SAPTO if your combined rebate income is below $87,620 and each partner's determined share is under $43,810. [1]

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Step 3: Calculate Individual SAPTO & Spousal Transfer

Individual Amount: The actual SAPTO amount you each receive is calculated using your individual rebate income (not your combined income). As your individual income rises above the base threshold, your offset reduces by 12.5 cents for every dollar over the threshold until it phases out completely. [1, 2]
Transferring Unused SAPTO: If one partner has a low taxable income and does not use their full SAPTO amount, any unused portion can automatically transfer to the eligible spouse to help reduce their tax payable. [1, 2]

Note: You can review detailed instructions and tax offset code types (such as Code D for couples living together) via the ATO T1 Seniors and Pensioners Tax Offset Guide. [1]