Something changed in the order of operations, and most South African business owners have not noticed yet.
For twenty years the sequence was: you declare, SARS checks. From this month the sequence is: SARS assembles, you confirm. Between 1 September and 31 October, banks, insurers, medical schemes, asset managers and trustees are loading six months of your financial life into SARS's systems. When the trust return opens on 19 September, it opens already populated. When your employees file, their IRP5 data is already sitting there.
And on 1 April this year, the defence you used to have when a number turned out wrong — that it was an honest mistake — was narrowed.
Those three things are one story. Here is what it means for a business owner over the next six weeks.
Key takeaways
- Third-party data for 1 March to 31 August is being submitted right now, between 1 September and 31 October. SARS will hold its version of your interest, dividends, medical contributions, insurance payments and trust distributions before you file.
- Trust filing season opens 19 September and closes 22 January 2027. The IT3(t) return is due 30 September, and the ITR12T is prepopulated from it — so an IT3(t) error becomes a return error automatically.
- The "bona fide inadvertent error" defence moved. From 1 April 2026 it is no longer the gate into the understatement penalty regime; it is a ground for remission in narrower circumstances.
- The VAT registration threshold is now R2.3 million, up from R1 million on 1 April 2026. Deregistering is not free: it triggers output VAT on your assets with no sale and no cash.
- The interim EMP501 window opens 21 September. The new e@syFile build lands mid-September and the thin client is the only submission channel.
- The economy contracted 0.2% in Q2, which is the backdrop to every cash-flow decision in the list above.
The bit nobody sees: the third-party data window
SARS's third-party data reporting runs on a fixed rhythm. Data covering 1 March to 31 August must be submitted between 1 September and 31 October each year; the full-year submission runs 1 April to 31 May (SARS).
What gets submitted is broader than most people assume: IT3(b), IT3(c), IT3(e), IT3(s) and IT3(t) returns, dividends tax, withholding tax on interest, medical scheme contributions, insurance payments, donations, and FATCA/CRS exchange data (SARS).
You are not the one filing most of it. Your bank is. Your medical scheme is. Your trustees are. But it arrives at SARS before your return does, and from there it flows into the prepopulated fields you are asked to confirm.
The practical consequence is that "I didn't know" has a shorter shelf life every year. The number is already there. Accepting it without checking is a decision, not a default.
Trusts: the return opens already answered
Trust filing season runs 19 September 2026 to 22 January 2027, and the IT3(t) third-party data return is due 30 September 2026 (SARS, FAnews).
The order matters. The IT3(t) reports what was vested in beneficiaries. The ITR12T is then prepopulated from it. If the IT3(t) is wrong, the return inherits the error and you are correcting it against SARS's own data rather than supplying it fresh.
Three things are different this cycle (FAnews, Accounting Weekly):
- Prepopulation from IT3(t) of income, vested amounts and beneficiary data.
- Enhanced beneficial ownership disclosure, including an organogram of the trust's ownership structure, alongside the trust instrument, financial statements, letters of authority and trustee resolutions.
- An administrative non-compliance penalty framework for trust filing obligations, with SARS signalling that nil returns and assessed-loss positions get particular attention.
Dormant trusts are not exempt. A trust that did nothing all year still files, and the "it's inactive" explanation has never been a filing exemption — it is just the reason people forget.
For anyone with a February year-end, the third provisional tax top-up payment also falls due at the end of this month, which makes 30 September a heavier date than it looks.
If your business sits under a trust — and a large share of South African family businesses do — this is your deadline, not only your accountant's. Trustees remain personally responsible for the trust's tax compliance regardless of who does the work.
The honest-mistake defence moved, and it matters more now
This is the change that ties the rest together, and it took effect on 1 April 2026.
Previously, a bona fide inadvertent error operated as a gateway: establish it, and the understatement penalty regime did not apply. After the amendment it has been "repositioned and materially narrowed" — it now functions as a ground for remission rather than an entry condition, available where an understatement is substantial and the specified culpable behaviours are absent (Moonstone).
A substantial understatement is the greater of 5% of the tax chargeable or refundable, or R1 million, and carries a 10% penalty in the standard case. There is an alternative route: an opinion from an independent registered tax practitioner that the position taken is more likely than not to be upheld if litigated, provided full disclosure was made by the return due date (Moonstone).
Read that alongside prepopulation and the shape becomes clear. SARS supplies a number. You accept it. It turns out to be wrong. The question of what you did to check it is now a live one, and "I assumed the prepopulated figure was correct" is a weaker answer than it was eighteen months ago. Whatever review you do this season, document that you did it.
VAT: a higher threshold, and a bill for leaving
The September 2026 VAT Connect landed on 8 September, covering the increased registration threshold, schools exiting the VAT system, and recent amendments (SARS).
The threshold itself: from 1 April 2026 the compulsory VAT registration threshold increased from R1 million to R2.3 million (SARS). That is a genuine loosening, and it takes a large band of small businesses out of compulsory registration. Our VAT registration guide covers the thresholds in full.
The trap is on the way out. Deregistration is a deemed supply: the VAT Act treats your remaining enterprise assets — stock, equipment, vehicles — as supplied immediately before deregistration, and output VAT is payable at the tax fraction of 15/115 on the lower of cost or market value. No sale happens. No cash comes in. The liability does (STBB).
So the calculation is not "do I want to stop filing VAT returns". It is:
- What is the one-off exit VAT on everything I own?
- How much input VAT do I currently recover on rent, fuel, subscriptions and stock that I would lose?
- Do my customers claim input tax? If you sell to VAT-registered businesses, your price to them is effectively unchanged either way and deregistering buys you nothing on price. If you sell to consumers, there is a real 15% pricing advantage.
- What happens when I grow back through R2.3 million?
An asset-light service business selling to the public is the clearest case for deregistering. An equipment-heavy business selling to other businesses is close to the clearest case against. Either way it is arithmetic against your own ledger — which is what our VAT compliance features are there to produce.
Still on the calendar: the interim EMP501
The employer interim reconciliation window opens 21 September and closes 31 October 2026, covering 1 March to 31 August. SARS ran e@syFile beta testing from 24 August with the formal build released mid-September, and the thin client is the only submission channel — Flex is retained for viewing historic data and nothing else (SARS).
The blocking issue remains what it was a week ago: an employee without a valid income tax reference number stops the whole submission. Pull that list now. We went through this cycle in detail in September's employer windows.
And the individual season closes for non-provisional taxpayers on 23 October 2026, with provisional taxpayers running to 22 January 2027 (SARS). Your staff will be asking about their IRP5s in October whether or not your reconciliation is done.
The backdrop: an economy that shrank
Stats SA reported on 8 September that GDP contracted 0.2% in the second quarter of 2026, ending six consecutive quarters of growth, with first-quarter growth revised down to 0.4%. Mining fell 3.0%, manufacturing 1.8%, and trade, catering and accommodation 1.9%. Finance, transport, government and personal services grew modestly (BusinessTech, SAnews).
This is not a compliance item, but it changes how the compliance items feel. A 10% penalty is survivable in a growth year and genuinely damaging in a flat one. Exit VAT on your assets is a different decision when trade revenue is down 1.9%. If you are in mining supply, manufacturing or hospitality, the quarter you are reconciling is probably weaker than the one before it, and the provisional tax estimate you are about to make should reflect that rather than last year's optimism. Our cash flow guide covers the mechanics of that.
What this adds up to
Compliance in South Africa used to be a disclosure exercise: you told SARS things it did not know. It is now a reconciliation exercise: SARS holds a version, you hold a version, and the filing is where they are compared.
That flips where the work sits. The value is no longer in filling the form in — it is increasingly filled in for you. The value is in being able to check it fast: to answer, in an afternoon rather than a fortnight, whether the prepopulated number matches your own records, and to show what you did to establish that.
Businesses that can do that will find this season uneventful. Businesses whose records live across three spreadsheets, a bank app and somebody's inbox will find out in late October what the gap costs.
Why we build it this way
Bluubin has run South African accounting and statutory payroll on a single live ledger for nineteen years, and everything above explains the design.
- One ledger, not a set of files that agree with each other by luck — accounting and payroll in the same system, so the figure in your management accounts and the figure on your EMP501 come from the same place.
- PAYE, UIF and SDL calculated against tax tables maintained as versioned code.
- EMP201, EMP501 and IRP5 with e@syFile export through tax-year-versioned exporters, so a historical period still submits against the specification that applied at the time.
- Pre-submission validation that blocks the export until the data is complete and links each error to the screen that fixes it.
- ETI calculated automatically each payrun.
- VAT reporting that tracks your position against the threshold rather than leaving you to notice it.
- Employment Equity and COIDA reporting, which most SME products simply do not address.
The point is not that software makes you compliant. It doesn't, and the responsibility stays with you. The point is that when SARS hands you a prepopulated number, you can check it against your own records in an afternoon, and you can show that you did.
There's a thirty-day trial with full access and no credit card if you want to run it against your own numbers.
If you take one thing from this article: between now and 30 September, confirm that whoever files your IT3(t) has the vesting figures right, and that every employee on your payroll since 1 March has a valid tax reference number. Those two checks remove most of what can go wrong in October.
This guide is general information to help you get oriented — it isn't formal tax or legal advice. Thresholds, rates and deadlines change, so confirm the current figures on the SARS website or with your accountant before you act.