If you employ even one person, there’s a SARS deadline landing this week that gets far less attention than the personal tax deadline everyone’s been talking about — but it can cost you more if you miss it. The Employer Interim Reconciliation, known as the EMP501, is due by 31 October 2026. Here’s exactly what it is, why it catches small business owners off guard, and what to check before Friday.

What exactly is an EMP501?

Every month you run payroll, you submit an EMP201 to SARS and pay over the PAYE, UIF and SDL you deducted from your staff’s pay. That’s a declaration of what you owe for one month at a time.

The EMP501 is different. It’s a reconciliation — SARS’s way of checking that everything you declared and paid over a six-month period actually adds up, and that it matches the tax certificates (IRP5s for permanent staff, IT3(a)s for others) you issue to each employee. Think of it as the half-year audit of your own payroll, done by you, before SARS does it for you.

The window: 21 September to 31 October 2026

This year’s interim reconciliation period covers payroll you ran from 1 March to 31 August 2026, and the window to submit it runs from 21 September to 31 October 2026.

If you have 50 or fewer employees, you submit through ordinary SARS eFiling. With more than 50, you’ll need e@syFile Employer. If you have only a handful of staff and would rather not do this online, you can book a SARS branch appointment — but with the deadline just days away, eFiling is by far the faster route.

What has to match before you submit

Three things need to line up before you hit submit:

• Every EMP201 you declared for March to August matches what you intended to pay each month.
• What you actually paid over to SARS (excluding any penalties or interest) matches those EMP201 declarations.
• The IRP5 or IT3(a) certificates generated for each employee reflect the real numbers for the period, with correct ID numbers and tax reference numbers.

If any of these are out of step, fix it now rather than after you’ve submitted. SARS has been strict about income tax reference numbers since earlier this year, and a missing or incorrect number can get your whole submission rejected.

What it costs you to get this wrong

Miss the deadline, and SARS doesn’t just send a reminder. The penalty starts at 1% of your annual PAYE bill and climbs by another 1% for every month you’re late, up to a cap of 10%.

If you claim the Employment Tax Incentive (ETI) for younger or lower-paid staff, a late or non-compliant EMP501 means forfeiting any ETI you haven’t yet claimed — money you simply don’t get back. And while it’s rare in practice, the law allows for a fine or up to two years’ imprisonment where a failure to submit is found to be wilful or negligent. Almost nobody ends up there, but it shows how seriously SARS treats this particular form compared with the EMP201s you file every month.

Your checklist before Friday

Before 31 October, make time to:

• Pull your EMP201s for March to August and check the totals against what you actually paid SARS.
• Generate your IRP5/IT3(a) certificates and check every employee’s details, especially ID and tax numbers.
• Log in to eFiling (50 or fewer employees) or e@syFile Employer and actually submit the EMP501 — not just save it as a draft.
• Confirm SARS has received it, not merely that you generated it.

If your books aren’t up to date or this feels like more than you want to tackle this week, get in touch. Reconciling an EMP501 properly, before SARS flags it, is exactly the kind of thing we handle for clients every reconciliation season.