SARS Auto-Assessment Season 2026: What Small Business Owners Need to Check Before Accepting

Auto-Assessment 2026: Don't Just Click Accept

Every July, SARS uses third-party data — from employers, medical schemes, retirement funds and financial institutions — to auto-generate an income tax assessment for millions of taxpayers. If you're selected, SARS will notify you by SMS or email between 1 and 12 July 2026. If you haven't heard anything by 12 July, you weren't selected and will need to file manually from 13 July 2026. You can also check your status via the SARS MobiApp, eFiling, or WhatsApp from 10 July 2026.

It's convenient. But for small business owners, sole proprietors, and anyone with income beyond a single salary, that convenience comes with real risk if you accept an assessment that's wrong.

Why Auto-Assessments Often Miss the Mark for Business Owners

SARS builds your auto-assessment from data submitted by third parties. That works well for simple salaried taxpayers. It works far less well if you:

• Run a sole proprietorship or freelance/consulting business alongside other income
• Earn rental income
• Have business expenses, home office costs, or travel claims to deduct
• Received income from multiple sources that don't all report to SARS in the same way
• Made additional retirement annuity or provident fund contributions outside payroll
• Have capital gains from selling business assets or investments

In these cases, the auto-assessment is frequently incomplete — not fraudulent, just missing pieces SARS simply doesn't have visibility into. Accepting it as-is could mean overpaying tax you didn't need to, or worse, understating income and facing penalties and interest later when SARS's data catches up.

Your Pre-Acceptance Checklist

Before you accept an auto-assessment, work through this list:

1. Log into eFiling or the SARS MobiApp and open the assessment in full — don't rely on the summary in the SMS or email.
2. Compare declared income against your own records. Does it include all your business income, or only what third parties reported (e.g. a single IRP5)?
3. Check that business expenses and deductions are reflected. Auto-assessments generally do not include sole proprietor trading income, expenses, or home office deductions — these must be added by you.
4. Verify medical aid, retirement annuity, and donation certificates match what your providers actually issued for the tax year.
5. Look for missing income streams — rental, freelance, side-hustle, or investment income not captured by third-party data.
6. Check the assessed tax liability or refund against your own estimate. A refund that seems too good to be true, or a bill that seems too high, is a signal to dig deeper.
7. Note the deadline. If you disagree, you must file a normal tax return correcting the figures — don't just ignore it and assume it will sort itself out.

What to Do If Something's Missing

If your auto-assessment doesn't reflect your full financial picture, you have the right to edit and file a normal return with the correct figures, supported by your own records. This is exactly where accurate, up-to-date bookkeeping throughout the year pays off — you'll have clean income and expense figures ready to go instead of scrambling in July.

How One Practice Helps You Prepare

One Practice keeps your books, income, and expense records organised throughout the year, so when Auto-Assessment season arrives, you're not caught off guard. We help small business owners prepare accurate figures — income summaries, expense breakdowns, and supporting schedules — so you or your tax practitioner can confidently review, correct, and capture your return. One Practice does not file returns on your behalf or calculate your final tax liability; that final submission and calculation always sits with you, SARS, or your registered tax practitioner.

Bottom Line

Auto-Assessment is a convenience tool, not a guarantee of accuracy. For small business owners, the safest approach is always: open it, check it line by line against your own records, and only accept once you're confident it reflects your complete financial year.

This article is general information only and does not constitute personalised tax or legal advice. Please confirm your specific position with SARS, a registered tax practitioner, or the relevant authority (such as UIF or CIPC) before acting on anything in this post.