SARS Auto-Assessment: Should You Accept It or File Your Own Return? (2026 Guide)

Every year around July, SARS sends millions of South Africans an auto-assessment — a pre-completed tax return based on information they’ve pulled from third parties. The message essentially says: “We’ve done your tax. If you do nothing in 40 days, this becomes final.”

It sounds convenient. It’s often wrong. Here’s how to decide what to do.

What is a SARS auto-assessment?

SARS receives data from employers, banks, medical aids, retirement annuity providers, and insurance companies. Using this data, they calculate your tax for the year and pre-populate an ITR12 return on your behalf.

You receive an SMS and/or email telling you:

1. Whether you owe SARS money or are due a refund
2. The amount
3. That you have 40 business days to accept, dispute, or file your own return
4. If you do nothing, the assessment becomes final automatically

Who gets auto-assessed?

Auto-assessments target simpler taxpayers — people whose income and deductions can mostly be reconstructed from third-party data. This typically includes:

• Salaried employees with one employer
• People with basic investment income (interest from banks)
• People with medical aid through their employer
• People with a retirement annuity tracked by SARS

You’re less likely to be auto-assessed if you:

• Are self-employed or have freelance income
• Have rental property
• Have a home office or other claimable deductions
• Have foreign income
• Made significant donations
• Have multiple income sources

If you have any of these, you’ll typically need to file an ITR12 yourself.

The fundamental question: is the auto-assessment correct?

Before deciding what to do, you need to check it. SARS’s auto-assessment is based on the data they have — but they don’t have everything.

Things SARS knows about:

• Your salary (from your IRP5)
• Tax already deducted via PAYE
• Medical aid contributions (from your scheme)
• Retirement annuity contributions (from your RA provider)
• Bank interest (from your bank’s IT3(b))
• Dividends and tax-free savings (from IT3 certificates)
• Some donations to registered PBOs

Things SARS doesn’t know about:

• Out-of-pocket medical expenses (specialist visits, medication, devices not claimed from medical aid)
• A home office deduction (if you qualify)
• Solar panel tax rebate (introduced for renewable energy)
• Travel expenses you incurred for work (if you got a travel allowance)
• Other freelance or side hustle income
• Capital gains or losses from investments
• Donations to PBOs that didn’t issue a section 18A certificate properly
• Section 12J investments (now phased out but might still be relevant for prior years)

The pattern: SARS auto-assessment is almost always correct on income, but often misses deductions that would have given you a bigger refund or reduced what you owe.

How to check your auto-assessment

When you get the auto-assessment notification:

1. Log into eFiling (efiling.sars.gov.za)
2. View the assessment
3. Compare to your own records

What to look for

Income side:

• Does the salary match your IRP5? (it should)
• Are all your IT3 certificates accounted for? (interest, dividends)
• Is there any income they’ve missed? (rare, but possible)
• Did you have a side hustle? (SARS won’t know about this — you need to add it)

Deduction side:

• Did you have out-of-pocket medical expenses? Add them.
• Did you make any retirement annuity contributions outside the auto-disclosed ones?
• Did you make donations to PBOs?
• Do you qualify for the solar panel rebate?
• Did you have travel expenses against a travel allowance?
• Are you self-employed even partly? (changes everything)

The three options when you receive an auto-assessment

Option 1: Accept it (do nothing)

If you check the assessment and it’s accurate — meaning SARS has captured all your income and all your deductions correctly — you can simply do nothing. After 40 business days, it becomes final. If you owe money, you’ll need to pay by the due date. If you’re getting a refund, it’ll be paid out.

When to accept:

• You’re a straightforward salaried employee
• You have no side income SARS doesn’t know about
• You have no out-of-pocket medical expenses worth claiming
• You don’t qualify for any deductions SARS hasn’t included
• The math checks out against your IRP5 and IT3 certificates

Option 2: Edit the return and file it

If the auto-assessment is missing something, you can edit it. Open the ITR12 in eFiling, add the missing information (deductions, additional income, etc.), and submit it. SARS will recalculate based on the new information.

When to edit:

• You had medical expenses paid out-of-pocket
• You have a home office deduction
• You qualify for the solar rebate
• You have additional retirement annuity contributions
• You have side hustle income to declare

This is the most common scenario for anyone with even a modestly complex tax situation.

Option 3: Dispute the assessment

If you believe SARS has made an actual error (not just missed a deduction you can add), you can dispute the assessment. This is rarer and involves submitting a formal notice of objection (NOO) through eFiling.

When to dispute:

• SARS has overstated your income
• SARS has misapplied a tax rate or rebate
• SARS has included income that isn’t actually yours (e.g., joint account where you’re not the holder)

The biggest auto-assessment trap: “If they say I get a refund, why bother?”

Many people see “Refund: R3,400” on their auto-assessment and accept it without checking. They get the refund, feel good, and move on.

But you might have been due a refund of R8,000 if SARS had known about your medical expenses or home office.

The auto-assessment isn’t a gift — it’s a baseline. A few minutes of checking often reveals deductions worth thousands more.

Common things people forget to claim

1. Out-of-pocket medical expenses

Anything you paid that your medical aid didn’t cover, AND that wasn’t reimbursed. Specialist visits, medication for chronic conditions, dental work, certain devices, fertility treatments. These add up fast and SARS doesn’t know about them automatically.

2. Home office deduction

If you work from home and meet SARS’s requirements, this can be a significant deduction. Full guide on home office deductions here.

3. Solar panel rebate (if applicable)

For tax years 2023/24, SARS introduced a tax rebate of up to R15,000 for individuals who installed qualifying solar PV panels at their primary residence. This was a one-off and is no longer claimable for new installations, but check if you have prior years to amend.

4. Additional retirement annuity contributions

SARS knows about RA contributions tracked by your RA provider, but if you contributed directly outside that (e.g., a lump sum), it may not be captured.

5. Travel expenses against a travel allowance

If your employer paid you a travel allowance, you can claim actual business travel costs (or use SARS’s km-based calculation). This requires a proper logbook.

6. Tax-deductible donations to PBOs

Donations to registered Public Benefit Organisations with a section 18A certificate are deductible up to 10% of your taxable income. SARS won’t always pull these automatically.

7. Wear and tear on assets used for work

If you bought a laptop, phone, or other equipment used for income generation, you can claim depreciation. Especially relevant for the self-employed.

What about side hustle income?

Critical point: if SARS auto-assessed you but you also have side hustle income they don’t know about, you are legally required to declare it.

Accepting an auto-assessment that doesn’t include your side hustle income isn’t “SARS made an error” — it’s a misrepresentation by you. If they audit later and find undeclared income, you’ll face the standard penalties (200% of evaded tax, plus interest).

The honest path: edit the auto-assessment to include the side hustle income, declare any associated expenses, and let SARS recalculate. You might owe more — but it’s a much smaller “more” than getting caught.

The 40-day countdown

You have 40 business days from the date SARS issues the auto-assessment to take action. After that, it becomes final.

If you accept (do nothing):

• No further action required
• Refund (if any) gets paid out automatically
• Money owed (if any) must still be paid by the regular due date

If you edit and submit:

• The clock resets — you’ve now filed a new return
• SARS processes it and issues a new assessment, usually within days
• You’re back in the normal cycle

If you dispute:

• You have 30 business days from the date of the disputed assessment to file the objection
• This is a formal process with specific requirements

Common auto-assessment mistakes

1. Accepting without checking

The most common mistake. People see “refund” and accept blindly. Always check.

2. Missing the 40-day deadline

If you don’t act, the auto-assessment becomes final, and changing it later requires the more cumbersome objection process. Mark the deadline.

3. Editing the assessment but not submitting it

Some people make edits in eFiling but don’t actually click submit. The original auto-assessment then becomes final.

4. Including invalid deductions just because the field is there

Don’t add things you can’t justify. Audit risk increases when you claim deductions you don’t actually qualify for.

5. Not keeping documentation for items you added

If you edit the assessment to add medical expenses or home office, you need receipts and proof. Keep them for 5 years.

The bottom line

The SARS auto-assessment is a starting point, not a finished product. For straightforward salaried taxpayers with simple finances, it’s often correct. For everyone else — and especially for anyone with side income, deductions, or self-employment income — it’s almost always worth editing.

A 30-minute review of your auto-assessment is one of the highest-ROI things you can do at tax season. People routinely find R5,000–R15,000 in missed deductions just by going through their year properly.

If you’re not sure where to start:

1. Pull together your medical aid statements (look for out-of-pocket amounts)
2. Pull retirement annuity statements
3. List any donations to PBOs (with section 18A certificates)
4. Think about whether you have a home office that meets SARS’s requirements
5. List any side income SARS doesn’t know about

Then go back to your auto-assessment and make sure it reflects reality.

---

Building TaxKit — coming 2026/27 tax season. When tax season comes, TaxKit will already have your year of receipts and deductions ready to go — making auto-assessment review (or filing your own return) a 10-minute job. Join the waitlist.