SARS rejects employer reconciliations that include employees without valid income tax reference numbers. With the interim EMP501 window open until 31 October 2026, here is what that means for your payroll records and how to close the gaps in time.
A change to how SARS processes employer reconciliations has direct implications for any organisation that runs payroll in South Africa. An **EMP501 reconciliation** that includes an employee who is required to be registered for income tax, but who has no valid **Income Tax Reference Number (ITRN)** on record, is not accepted as it once was. The 2026 annual filing season was the first run under that enforcement, and the **interim reconciliation now open until 31 October 2026** is the second. This guide explains who must be registered, how to find and close the gaps, and what the 2026 timeline looks like. > **Key facts (as at 2026-09-28)** > - **Interim EMP501 window:** 21 September to 31 October 2026, covering payroll from 1 March to 31 August 2026 (SARS, employer interim declarations notice, 21 September 2026). > - **Annual EMP501 window:** 1 April to 31 May each year, covering the full tax year to the end of February (SARS; the 2026 season ran 1 April to 31 May 2026). > - **ITRN validation:** SARS validates each employee tax certificate against the employee's income tax reference number, and a certificate without a valid number can be rejected (SARS, observed across the 2026 annual season). > - **Channels:** e@syFile Employer for all employers, or SARS eFiling for employers issuing 50 or fewer IRP5/IT3(a) certificates (SARS). > - **Monthly EMP201:** due by the 7th of the following month, and not blocked by ITRN gaps, but the reconciliation depends on all of them agreeing (SARS). This guide covers: - Why SARS enforces the ITRN requirement - Which employees are affected - The routes to a missing tax number - The 2026 EMP501 timeline - A worked example - Frequently asked questions ## Why SARS Enforces the ITRN Requirement SARS has automated its compliance systems over several years, and employer reconciliations are now validated line by line. A certificate for an employee who should be registered but is not, or whose number on file is wrong, fails that validation. In the 2026 annual season the result for unprepared employers was blocked or bounced submissions, a scramble to register employees mid-season, and delayed IRP5 certificates for everyone on the payroll. Atlan reviewed those patterns after the season closed in its [EMP501 season 2026 lessons](https://atlan.co.za/news/emp501-season-2026-lessons). > One missing tax number can hold up an entire payroll reconciliation. It is not a minor administrative gap. It is a submission blocker. The broader context is that SARS uses data matching to identify inconsistencies earlier. Payroll records that were adequate two or three years ago may not pass the same scrutiny today. ## Which Employees Are Affected The requirement applies to employees who are **required to be registered for income tax** under South African law. In practical terms this includes most permanent employees and many fixed-term and temporary workers. Employees earning below the tax threshold may not be required to register in some circumstances, but the safer approach is to verify the status of every employee rather than assume an exemption. The categories that most often generate gaps are: - **New hires** who provided incomplete onboarding documentation - **Seasonal or temporary workers** who were never formally registered - **Long-standing employees** whose records were set up before ITRN validation was strictly enforced - **Learners and YES youth on stipends** who have not yet registered with SARS in their own right An **employee number** is not a tax number. The employee number is the identifier your payroll system assigns; the ITRN is the ten-digit number SARS issues to the individual, and it is the one the reconciliation validates. ## The Routes to a Missing Tax Number Audit your payroll system against the ITRN field for every active employee first. Most payroll platforms flag missing or invalid reference numbers in a compliance or exception report. For the gaps, these are the routes SARS provides: | Route | Who does it | What it needs | Best for | |---|---|---|---| | Self-registration on SARS eFiling or the SARS MobiApp | The employee | ID document, contact details, and a bank account where relevant | Individual employees who can complete a digital process | | Tax reference number enquiry on eFiling | The employer | The employee's ID number | Checking whether a number already exists before registering anew | | e@syFile Employer bulk registration (ITREG) | The employer | Employee details captured in e@syFile | Registering several employees at once | | SARS branch appointment | The employee | ID document and proof of address | Employees who cannot complete self-registration digitally | Start early. SARS branch and call-centre queues lengthen in the weeks before every submission deadline, and a number requested in the last week of a window may not arrive in time. Confirm the current process on the [SARS PAYE page](https://www.sars.gov.za/types-of-tax/pay-as-you-earn/) before you rely on a part...