Tax Deductions South Africans Often Miss in 2026

Auto-assessments and busy Filing Seasons mean many taxpayers only look at what SARS already pre-filled. The largest refund surprises usually come from items you must claim or correct. Use this checklist for returns covering the year of assessment 1 March 2025 – 28 February 2026 (Filing Season 2026) — then open the deeper guides where you need detail.

Not tax advice. Eligibility is facts-specific; confirm with SARS or a registered tax practitioner.

1. Travel allowance with a logbook

If your IRP5 shows travel allowance code 3701 (or taxable reimbursements), a compliant business kilometre logbook can support a deduction on assessment. Home-to-work travel is private. See our Travel Allowance & Logbook guide and the SARS 2025-26 eLogbook.

2. Retirement fund and RA contributions (section 11F)

Pension, provident, and RA contributions share one limit: generally 27.5% of the greater of remuneration or taxable income (with exclusions), capped at R350 000 for the YOA ending 28 February 2026. From 1 March 2026 the monetary cap theme is R430 000. Private RAs are often missing from auto-assessments. See our Section 11F / RA guide.

3. Section 18A donations

Donations to approved public benefit organisations with a valid Section 18A certificate can be deductible, generally limited to 10% of taxable income (excluding certain lump sums / severance). Excess often carries forward. No certificate, no claim.

4. Additional medical expenses tax credit (section 6B)

Section 6A medical scheme fees tax credits are often partly on your IRP5 already. 6B additional medical expense credits are easier to miss — especially if you are 65+, have a qualifying disability situation, or have large unrecovered out-of-pocket costs. Credit rates change by year (for example Budget 2026 materials list updated monthly 6A amounts such as R376 / R254 for the newer year vs R364 / R246 previously) — label the YOA before using a rand figure. See our Medical Tax Credits guide.

5. Home office expenses

Employees face strict exclusive- and regular-use tests; sole proprietors use trade-expense principles. Claims are audit-sensitive and can affect CGT primary residence relief when you later sell. Read our Home Office guide before claiming.

6. Rental property expenses

Rental income is rarely on an auto-assessment. Declare rent and claim allowable expenses you can prove (rates, interest themes, repairs, agent fees, proportional costs). Keep a clear split between private and rental use.

7. Local interest — claim the exemption, don’t ignore the certificate

IT3(b) interest must be declared; natural persons then use the local interest exemption — R23 800 (under 65) or R34 500 (65+) for SA-source interest. TFSA growth is separate and does not consume this exemption.

8. Freelance / side-hustle trade expenses

If you invoice outside PAYE, you may be a provisional taxpayer with deductible trade expenses — and an ITR12 that an IRP5-only auto-assessment will not complete. See our Freelancer and Provisional Tax guides.

Quick Season 2026 Process Tips

• Non-provisional filing window: 13 July – 23 October 2026; provisional often to 22 January 2027
• If an auto-assessment is complete and correct, SARS generally does not require an “accept” click — but review it anyway
• Wrong or incomplete? Update and file; do not leave missing deductions behind
• Keep supporting documents five years

How Refund AI Can Help

Refund AI can help you explore which deduction themes usually apply to situations like yours and what documents SARS guidance emphasises. It does not prepare or submit your return. Double-check amounts and eligibility before you file.

Conclusion

Missed deductions are usually missed admin, not missed luck. Cross-check travel, retirement, donations, medical top-ups, home office, rental, interest, and side income against your IRP5 and auto-assessment before Filing Season 2026 closes for your category.

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Key Citations:

• SARS Filing Season 2026 dates and auto-assessment guidance
• Income Tax Act themes: ss 11F, 6A/6B, 18A; travel s 8(1)(b)
• Budget 2026 Tax Guide (interest exemptions; donation 10% limit; retirement caps)
• Related Refund AI guides: travel, RA, medical, home office, freelancer, provisional tax