There is a specific scenario in the SARS system that causes more panic than almost anything else — and it’s one that most business owners have never heard of until it happens to them.
SARS sends an assessment. The amount on it bears no resemblance to what you actually owe. In some cases it’s twice what it should be. In others it’s ten times. You didn’t submit a fraudulent return — you didn’t submit any return at all. And that is exactly the problem.
This is called an estimated assessment. SARS has the legal authority to determine what they think you owe, without your input, and issue a formal assessment for that amount. It is legally enforceable. And if you miss the window to dispute it, you owe every cent.
What an Estimated Assessment Is
Under the Tax Administration Act, SARS has the power to issue an estimated assessment when a taxpayer has failed to submit a required return. SARS uses whatever information they have available — third-party data from banks, employers, medical aids, and previous returns — to calculate what they believe your tax liability should be.
The key word is estimated. SARS is not claiming to know exactly what you owe. They are making a determination based on incomplete information — and incomplete information almost always works in SARS’s favour, not yours.
Deductions you would have claimed are not included. Business expenses are often not accounted for. Income from prior years may be used to inflate the current estimate. The resulting assessment is frequently higher — sometimes significantly higher — than what an accurate return would have shown.
Why It Happens
Estimated assessments are not issued randomly. They follow a predictable sequence.
SARS issues a request for a return. The taxpayer doesn’t respond. SARS issues a reminder. The taxpayer still doesn’t respond. SARS issues a final demand. No response. SARS then has the legal authority to issue an estimated assessment — and they use it.
The most common reasons business owners end up here are not dishonesty or fraud. They are:
An outstanding return that slipped through the cracks. A SARS correspondence that went to an old email address or an outdated eFiling profile. A business that grew and crossed a tax threshold without anyone realising. A provisional tax IRP6 that was never submitted — and SARS has treated as a nil return, then reassessed.
In every case, the underlying issue was ignoring or missing correspondence from SARS. The response to that correspondence — or the absence of it — is what triggers the estimated assessment.
The Real Question
Here’s what we see with our clients.
A business owner receives an SMS from SARS. They mean to look into it but don’t get around to it for three weeks. By the time they log into eFiling, there is an estimated assessment for R340,000. Their actual tax liability for the year, properly calculated, would have been R87,000.
The difference between R340,000 and R87,000 is not SARS being dishonest. It is the result of an estimate made without any of the deductions, expenses, or context that an accurate return would have provided.
The assessment is now legally enforceable. The taxpayer has a window to dispute it — but that window is fixed, and it is shorter than most people realise.
Your Window to Object — And Why It Matters
When SARS issues any assessment — including an estimated assessment — you have 80 business days from the date of the assessment to lodge a formal objection.
Miss that window and the assessment becomes final. SARS can begin collection action — including third-party appointments on your bank account, garnishee orders, and asset seizures — on the basis of a number that may bear no relationship to what you actually owe.
Eighty business days sounds like a long time. In practice, many business owners don’t discover an estimated assessment until weeks after it was issued — because they weren’t monitoring their eFiling account or responding to SARS correspondence. By the time they realise what has happened, half the window has already passed.
The moment any unexpected SARS assessment arrives — log into eFiling the same day. Call your accountant the same day. Do not wait.
How to Fight It
Step 1: Submit the outstanding return immediately.
The fastest way to resolve an estimated assessment is to file the return that should have been filed in the first place. When SARS receives an accurate return, the estimated assessment is typically revised to reflect the correct liability. This is not guaranteed and SARS may not automatically withdraw the estimated assessment — your accountant needs to manage the process — but filing the correct return is always the starting point.
Step 2: Lodge a formal objection.
Within the 80-business-day window, lodge a formal objection via eFiling. The objection must specify exactly why the assessment is incorrect and must be supported by documentation — your accurate return, supporting records, calculations. A bare objection without evidence will not succeed.
Step 3: Let your accountant lead.
An objection to an estimated assessment is not a DIY process. SARS needs specific information in a specific format, and a poorly submitted objection can create new problems rather than resolving the original one. A good accountant has navigated this process before and knows what SARS needs to see.
Step 4: Request suspension of payment while the objection is pending.
You can apply to SARS to suspend payment of the assessed amount while your objection is being considered. This is not automatic — SARS can refuse — but for large estimated assessments where the dispute is legitimate, it is worth applying. Your accountant should do this at the same time as the objection.
How to Make Sure It Never Happens
Estimated assessments are almost entirely preventable. The businesses that receive them are, with very rare exceptions, the ones that fell behind on returns and stopped engaging with SARS correspondence.
File every return on time — even a nil return. A nil return tells SARS nothing is owed. It does not invite an estimated assessment.
Keep your eFiling contact details current. SARS sends correspondence to the email address and phone number on your eFiling profile. If those details are outdated, you will miss communications that require a response.
Monitor your eFiling account regularly. At least once a month, log in and check for any notifications, assessments, or outstanding items. This takes five minutes and eliminates the risk of discovering a problem weeks after it became urgent.
Respond to every SARS communication promptly. Every letter, every SMS, every eFiling notification. Silence is what escalates a routine query into an estimated assessment.
The Mindset Shift
Most business owners treat an estimated assessment like a crisis — something unexpected and unfair that arrived without warning.
It is almost never without warning.
The sequence from outstanding return to estimated assessment involves multiple notifications, multiple reminders, and multiple deadlines. Every step in that sequence was an opportunity to intervene. The estimated assessment is what happens when every opportunity is missed.
The businesses that never receive estimated assessments are not the ones with perfect tax affairs. They are the ones that respond to SARS the same week the correspondence arrives.
Keep It Simple
- SARS can issue an estimated assessment when returns are outstanding — and the amount is almost always higher than your actual liability
- You have 80 business days from the date of the assessment to lodge a formal objection
- Missing that window means the estimated amount becomes legally enforceable
- File the outstanding return immediately — this is always the first step
- Apply to suspend payment while your objection is being considered
- The best protection is filing every return on time and responding to every SARS communication promptly
An estimated assessment is not the end. But it requires immediate action — not next week, not when things are less busy. The same day.
General information only — chat to your accountant about your specific situation.