SARS Auto-Assessment: Why "Nothing Further to Be Done" Can Quietly Cost You

If SARS sent you an SMS or an email in early July telling you that your assessment was already done, you were auto-assessed. Most people read that as good news, click accept, and move on.

SARS's own wording encourages it: "If you agree with your auto-assessment, there is nothing further to be done."

That sentence is entirely true. The catch is the first three words. Agreeing is a decision about whether the assessment is right, and an auto-assessment is built from what other people reported about you — not from what you know about your own year.

If something was left out, accepting it does not postpone the claim. It closes the file with your money still at SARS. And because doing nothing counts as agreeing, that outcome arrives by default.

For most individual taxpayers the window to change it closes on 23 October 2026.

The 2026 dates

Filing Season 2026 runs on four separate windows:

If no notification reached you by 12 July, you were not auto-assessed, and you were expected to file from 13 July.

The date that matters for anyone auto-assessed and unhappy about it is 23 October 2026, because that is the ordinary non-provisional deadline and it is also your deadline to replace the auto-assessment with a return of your own.

Where the numbers come from

SARS does not estimate. It populates your return from data submitted by third parties — in its own list, "employers, financial institutions, medical schemes, retirement fund administrators, and other third-party data providers."

That is why auto-assessment works at all, and it is also precisely where its blind spot lies. The system knows what was reported. It has no way of knowing anything that nobody files a return about on your behalf.

So the assessment will reliably capture your salary and the tax already withheld, the interest and dividends your bank and platforms declared, your contributions to a medical scheme and a retirement fund. It cannot capture what only you know.

What an auto-assessment cannot see

This is the part worth ten minutes of your time before you accept anything.

• Home-office expenses, if you genuinely qualify. Nobody reports these to SARS.
• A travel claim against a travel allowance. Your employer reports the allowance. Only your logbook establishes the business portion, and without a return there is no logbook.
• Section 18A donations to approved public benefit organisations. You hold the certificate; SARS does not automatically receive it.
• Qualifying out-of-pocket medical costs paid directly rather than through your scheme. The scheme reports what went through the scheme, and nothing else.
• Rental losses, and any other income or expense outside employment and interest and dividends.
• A second employer or a mid-year job change where the two payrolls each taxed you as though they were your only income.

None of these make the auto-assessment wrong in the sense of being fraudulent. They make it incomplete — and incomplete in one direction, because every item above would have reduced what you owe.

Accepting by silence

The design point people miss is that acceptance does not require a click.

If you take no action, the auto-assessment simply stands. There is no confirmation step in which someone asks whether you are sure, and no later reminder that you left a deduction unclaimed. The file closes on the deadline.

So the safest-looking option — do nothing, it is already handled — is the one that costs money where anything was omitted. Ten minutes spent comparing the assessment against your own records is the whole of the work.

If money is coming back, or going out

Refunds. SARS pays refunds of R100 or more automatically within 72 hours. If your refund is under R100, it is carried to the next tax year and paid once the balance exceeds R100. Bank details that are out of date are the usual reason a refund stalls, so check them before you chase anything.

Amounts owed. A debt of R100 or more must be paid by the due date. Smaller amounts can be paid immediately or carried to the next year — but note SARS's own qualification: "interest is payable on any debt", regardless of the amount. Carrying a small balance is not the same as it being free.

Which deadline is actually yours

A great many people do not know whether they are a provisional taxpayer, and it changes the deadline by three months.

Broadly, provisional taxpayers are those earning income from business, freelance work, investments or rental sources — income that arrives without PAYE having been deducted along the way. Someone whose entire income is a salary, taxed by their employer every month, is normally not provisional.

The distinction matters twice over. It sets whether your deadline is 23 October 2026 or 22 January 2027. And it tends to correlate with exactly the kind of income an auto-assessment handles least well, because business, freelance and rental income are the sources third parties do not report on your behalf.

If you have a side income of any size and have never thought about this, that is the question to resolve before the October date passes, not after.

What to have in front of you

The ten-minute check only works if the documents are to hand. For most people that is:

• An IRP5 from every employer you had during the tax year, including one you left partway through.
• Your medical scheme tax certificate, which shows contributions and what the scheme paid.
• Your retirement fund contribution certificate.
• Interest certificates from every bank and platform, including accounts you barely use.
• Section 18A receipts for donations to approved organisations.
• Your logbook, if you receive a travel allowance. Without it there is no claim, whatever the mileage actually was.
• Records of any income outside your salary — rent received, freelance invoices, a business.

Compare the totals on those documents against the figures in the assessment, line by line. Discrepancies are usually a missing document rather than a SARS error: an old bank account nobody declared, or an employer whose submission arrived late.

Who does not get auto-assessed

You will not be auto-assessed where your personal information is incomplete, or where your income falls outside the employment and interest-and-dividend sources SARS receives data on — rental income being the example SARS itself gives.

If you fall into that group, no notification arrives and the obligation to file is entirely yours, on the ordinary deadline. The absence of a message is not permission to skip the year.

What to do, in about ten minutes

1. Open the assessment on eFiling or the MobiApp and read the calculation, not just the refund figure at the bottom.
2. Check it against your own documents — IRP5s from every employer, medical scheme certificate, retirement fund certificate, interest certificates, s18A receipts, your logbook.
3. List anything missing. Every item on the list above is a deduction the assessment could not have known about.
4. If it is complete, accept it. Auto-assessment is a genuine convenience where the year was simple.
5. If anything is missing, file a return instead — by 23 October 2026 if you are non-provisional. Filing replaces the auto-assessment; you are not appealing it, you are submitting the version with everything in it.
6. Check your banking details before expecting a refund.

If you disagree with the outcome after filing, that is a different process with its own deadlines — our guide on disputing a SARS assessment or penalty covers the objection route.

Where to go next

For the mechanics of submitting, see how to file your tax return and our eFiling tips and checklist. If you have never used eFiling, start with registering for eFiling.

To sanity-check the arithmetic before you accept anything, our income tax calculator and tax refund calculator let you model your own figures, and the medical tax credit calculator covers the credits most often queried.

For everything else, start at our money guides.

Frequently asked questions

What is a SARS auto-assessment? An assessment SARS raises for you using third-party data from employers, financial institutions, medical schemes, retirement fund administrators and others, without you filing a return first.

When were auto-assessments issued in 2026? Notifications went out by SMS or email between 1 July and 12 July 2026.

What if I never received a notification? You were not auto-assessed. You must file, from 13 July, by your ordinary deadline.

What is my deadline to change an auto-assessment? 23 October 2026 for non-provisional individual taxpayers. Provisional taxpayers have until 22 January 2027, and trusts file from 19 September 2026 to 22 January 2027.

What happens if I do nothing? The auto-assessment stands. Silence counts as agreement, including on any deduction it left out.

Is accepting it risky? Only where your year included something third parties do not report — home-office costs, a travel claim, s18A donations, out-of-pocket medical expenses, rental income or losses, or a second employer.

How quickly is a refund paid? Refunds of R100 or more are paid automatically within 72 hours. Anything under R100 is carried to the next tax year until the balance exceeds R100.

What if I owe SARS instead? R100 or more must be paid by the due date. Smaller amounts may be paid now or carried over, but interest is payable on any debt regardless of size.

Do I appeal an auto-assessment I disagree with? No — you file a return, which replaces it. Objections and appeals are a separate process that comes after an assessment you have filed against.