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How the Spousal Exemption (Section 4q) Reduces Estate Duty
Key Takeaways
- No immediate tax: Assets left to a surviving spouse are fully exempt from Estate Duty under Section 4(q).
- It's a delay, not a cancellation: The tax is effectively "rolled over" to when the surviving spouse eventually passes away.
- Portable Abatement: If you don't use your R3.5m basic tax-free threshold, it rolls over to your spouse, giving them a future R7m threshold.
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When planning your estate in South Africa, one of the most powerful tax-saving mechanisms available is the Section 4q deduction. This rule allows you to leave assets to your surviving spouse without incurring immediate estate duty.
What is the Section 4q Spousal Roll-Over?
Under Section 4(q) of the Estate Duty Act, any property or assets bequeathed (left in a will) to a surviving spouse are fully deductible from the gross value of the deceased's estate.
This means that you can transfer an unlimited amount of wealth, including primary residences, investments, and cash, to your husband, wife, or life partner completely tax-free at the time of your death. The tax liability is effectively "rolled over" and will only be calculated when the surviving spouse eventually passes away.
Scenario 1: 100% to the Spouse
The Situation: John passes away. He leaves his entire estate, which consists solely of a paid-off primary residence valued at R5,000,000, to his surviving wife, Sarah.
Step 1: Calculating the Gross Estate
The Gross Value of John's estate is R 5,000,000.
Step 2: Applying the Section 4q Deduction
Because the entire R5,000,000 asset is bequeathed directly to his spouse, the estate can claim a Section 4q deduction for the full amount.
R 5,000,000 (Gross Estate) - R 5,000,000 (Section 4q Deduction) = R 0 Net Estate.
Scenario 2: The "Mixed" Estate
The Situation: What if John has a R5m house (left to his wife Sarah) but also has R4m in cash investments that he leaves to his adult son?
The Calculation
The Section 4q deduction only applies to the R5m house. The R4m cash left to the son remains in the estate for duty purposes.
The estate's dutiable value would be calculated on the R4m, minus John's standard R3.5m Section 4A abatement.
Common Pitfalls and Misconceptions
What Happens When the Surviving Spouse Passes Away?
The Section 4q exemption is a delay of tax, not a permanent cancellation. When Sarah (from our scenario above) eventually passes away, the R5 million house will be included in her estate.
Does the Exemption Apply to Unmarried Partners?
Yes, provided certain criteria are met. The definition of a "spouse" for tax purposes in South Africa is broad. It includes marriages recognized by South African law, customary marriages, religious marriages, and even permanent same-sex or heterosexual life partnerships.
If you are in a permanent life partnership, you must be able to prove to SARS that the relationship was intended to be permanent (e.g., through shared expenses, joint bond accounts, or an affidavit).
Calculate Your Specific Scenario
Ready to run your exact numbers? Use our free 2026 Estate Duty Calculator to see how Section 4q and other deductions apply to your estate.
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