SARS Knows More About Your Finances Than You May Realise
South African tax compliance has become increasingly data-driven. Businesses and individual taxpayers can no longer assume that SARS only knows what appears on the tax returns they submit.
Information reported by employers, banks, financial institutions, medical schemes, fund administrators and other third parties gives SARS additional information that can be used to verify taxpayer declarations and identify discrepancies or potential risks. SARS specifically states that third-party information is used to pre-populate returns, verify taxpayer submissions and identify discrepancies or risks.
For businesses, this creates an important compliance reality. Figures submitted to SARS should not simply be correct in isolation. They also need to make sense when compared with accounting records, payroll information, financial data and other information available to the revenue authority.
A discrepancy does not automatically mean wrongdoing has occurred. It may be caused by an administrative error, incorrect third-party information, timing differences or an innocent mistake. However, unexplained inconsistencies can result in additional questions and potentially a SARS verification, risk assessment or investigation.
Understanding SARS data matching is therefore an important part of modern tax compliance in South Africa.
How Modern Technology Helps SARS Detect Non-Compliance
Tax administration has changed significantly from the days when compliance depended largely on manually reviewing submitted returns.
SARS has increasingly adopted a data-driven approach to administration and compliance.
Information can be compared electronically, making it easier to identify situations where different sources do not align.
For example, SARS may have information relating to:
- Employment income
- Interest received
- Investment transactions
- Retirement contributions
- Medical scheme information
- Certain donations
- Trust distributions
- Financial accounts
- Other information supplied through prescribed third-party reporting
SARS’s third-party reporting framework specifically covers information from institutions including banks, insurers, medical schemes, fund administrators and other prescribed entities.
The result is a tax environment where discrepancies are increasingly visible.
What Is SARS Data Matching?
In simple terms, SARS data matching involves comparing information from different sources to determine whether a taxpayer’s declared position appears accurate.
Imagine that a taxpayer submits one figure while information independently reported to SARS reflects something different.
That discrepancy may require explanation.
The objective is not necessarily to prove wrongdoing immediately. Rather, differences can become indicators that further verification may be necessary.
SARS describes verification as comparing information contained in a declaration or return against third-party information, financial and accounting records and other supporting documents.
That makes consistency increasingly important.
Where SARS Gets Third-Party Information
One of the most important components of modern tax administration is third-party reporting.
Banks and Financial Institutions
Financial institutions may report prescribed information relating to matters such as:
- Interest
- Certain investments
- Financial instruments
- Relevant financial transactions
This allows SARS to compare information reported independently with information contained in tax returns.
Employers
Employment information is another important data source.
Employer submissions can provide SARS with information relating to remuneration and employees’ tax.
Where payroll information and tax returns do not align, questions may arise.
Medical Schemes and Fund Administrators
Information supplied by medical schemes, retirement funds and similar institutions can be used to populate or verify information appearing on tax returns.
Trusts and Other Reporting Entities
South Africa’s third-party reporting framework has expanded across various entities and transaction types.
This means taxpayers should increasingly assume that financial information appearing elsewhere may eventually form part of SARS’s compliance picture.
Third-Party Reporting Is Becoming More Important
The scale of this information is significant.
SARS stated in 2026 that it relies on employer and third-party data to pre-populate and auto-assess personal tax returns. It also reported that during the 2025 filing season, tens of thousands of verifications resulted from missing or unmatched retirement, employer and medical information.
For businesses, the lesson is straightforward:
Accuracy between different reporting systems matters.
A figure entered incorrectly in payroll or accounting software may eventually create a discrepancy elsewhere.
Common Risk Indicators That May Require Attention
There is no single public checklist that guarantees a SARS investigation. However, several types of inconsistencies can create legitimate compliance concerns.
Income That Does Not Match Available Information
Where income declared to SARS differs from independently reported information, further clarification may be required.
Sometimes the explanation is straightforward.
In other cases, the discrepancy could indicate undeclared income.
Payroll Differences
Differences between:
- Payroll records
- PAYE submissions
- Employee tax certificates
- Accounting records
should be investigated promptly.
Even innocent payroll errors can become more difficult to resolve if they continue across multiple periods.
VAT and Turnover Inconsistencies
Businesses should ensure that VAT declarations make sense when considered alongside:
- Sales records
- Financial statements
- Accounting systems
- Supporting invoices
Differences may have legitimate explanations, but businesses should be able to substantiate them.
Unexplained Financial Transactions
Large or unusual transactions should be properly recorded and supported.
Examples might include:
- Shareholder funding
- Loans
- Asset disposals
- Once-off income
- Intercompany transfers
A transaction that is legitimate can still create difficulties if there is no documentation explaining what it represents.
Why Accurate Accounting Records Matter
One of the best defences against unnecessary tax complications is good accounting.
A business should be able to move logically from its underlying transactions to:
- Accounting records
- Financial statements
- Tax calculations
- Returns submitted to SARS
When those records tell the same story, responding to SARS is significantly easier.
When they contradict each other, resolving the issue can become time-consuming.
Data Matching Does Not Automatically Mean You Have Done Something Wrong
This distinction is important.
A mismatch does not necessarily indicate tax evasion or deliberate non-compliance.
Differences may occur because of:
- Incorrect third-party submissions
- Timing differences
- Duplicate information
- Administrative mistakes
- Incorrect classifications
- Legitimate adjustments
SARS itself allows taxpayers to access certain tax certificates and third-party information submitted on their behalf, which can help identify information that may need to be queried with the relevant provider.
The key is being able to explain and substantiate the difference.
What Happens When SARS Identifies a Discrepancy?
Depending on the circumstances, SARS may request further information or select a return for verification.
During verification, taxpayers may be asked to submit supporting material relating to information declared on a return.
If SARS determines that the declaration was incorrect, a revised assessment may follow.
More serious or complex concerns may potentially progress beyond a straightforward verification into an audit.
Importantly, SARS treats verification and audit as separate processes. A verification checks declared information against supporting sources, while an audit involves a more detailed examination of the taxpayer’s records and tax position.
Reducing Your Business Risk Before SARS Contacts You
The best time to identify a tax discrepancy is before SARS identifies it.
Businesses should adopt preventative compliance practices rather than waiting for a verification notice.
Reconcile Tax Accounts Regularly
Do not wait until year-end.
Regularly reconcile:
- VAT
- PAYE
- Income tax
- Provisional tax
- Payroll
- Financial accounts
Regular reconciliation makes discrepancies easier to identify while supporting records are still readily available.
Review Third-Party Information
Where third-party information is available, taxpayers should check it for accuracy.
Do not assume information submitted by another institution is automatically correct.
If something is wrong, investigate it promptly.
Maintain Proper Supporting Documentation
Every significant transaction should have a clear paper trail.
Depending on the transaction, documentation may include:
- Invoices
- Contracts
- Bank statements
- Loan agreements
- Payroll records
- Asset schedules
- Accounting reports
- Proof of payment
Good records help transform an unexplained discrepancy into an easily substantiated transaction.
Review Returns Before Submission
Tax returns should not be treated as an isolated compliance exercise.
Before submitting, businesses should ask:
- Do the figures reconcile with the accounting records?
- Are payroll submissions consistent?
- Have unusual transactions been treated correctly?
- Are deductions properly supported?
- Are there unexplained differences?
Finding a problem before submission is generally easier than explaining it afterwards.
Why Proactive Tax Compliance Is Becoming More Important
The growing use of third-party information means businesses need to think differently about compliance.
The question is no longer simply:
“Did we submit the return?”
The better question is:
“Can every important figure in that return be explained and supported?”
That shift is important.
Businesses with strong internal records are better positioned to respond quickly if SARS asks questions.
How CTV Can Help Businesses Identify Tax Risks Early
CTV can assist businesses with proactive tax compliance reviews designed to identify inconsistencies before they become larger SARS issues.
This may include reviewing:
- Tax submissions
- Accounting information
- Payroll records
- Supporting documentation
- Historical discrepancies
- SARS correspondence
- Compliance status
Where an issue is identified, the appropriate correction or response can then be considered before the problem escalates.
Prevention Is Better Than Reactive Compliance
Receiving an unexpected SARS notification can place immediate pressure on a business.
Management must locate documentation, review historical transactions and potentially involve accountants or tax practitioners at short notice.
A proactive approach reduces this pressure.
Regular tax reviews allow businesses to identify:
- Missing information
- Reporting inconsistencies
- Incorrect classifications
- Historical errors
- Documentation gaps
before they become urgent.
Conclusion
SARS increasingly operates within a data-rich tax environment. Information supplied by taxpayers can be compared against third-party information, accounting records and supporting documentation to determine whether declared tax positions appear accurate.
For South African businesses, this makes consistency and documentation more important than ever.
SARS data matching should not be viewed simply as something to fear. It should be viewed as a reason to strengthen internal tax controls.
Accurate records, regular reconciliations and proactive compliance reviews help businesses identify discrepancies before they develop into costly or time-consuming SARS matters.
If you are unsure whether your business’s tax records, payroll information and SARS submissions align correctly, contact CTV for a proactive compliance review. Identifying a discrepancy before SARS raises it gives your business more time to understand the problem and take the appropriate action.
