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Tax & SARS

SARS Can Fine You 20% for Guessing Wrong on Provisional Tax — Even Without Trying to Cheat

If your actual taxable income is R1 million or less, a 20% penalty applies if your second provisional estimate was both under 90% of actual income and under your prior year's assessed "basic amount"; above R1 million, the estimate simply needs to reach 80% of actual income — and the penalty applies regardless of intent.

For freelancers and business owners earning outside PAYE, it's often financially safer to slightly overestimate provisional tax than risk this automatic penalty plus interest. A voluntary top-up payment within six months of year-end can correct a low estimate before the penalty bites — Budget 2026 proposed raising the R1 million threshold to R1.8 million.

Source: SARS

Frequently Asked Questions

Does the 20% underestimation penalty require any intent to avoid tax?

No — it applies automatically based on the numbers, regardless of whether the underestimate was deliberate or an honest miscalculation.

Can I fix a low provisional tax estimate before SARS assesses the penalty?

Yes — a voluntary third, top-up payment can be made within six months after year-end to reduce or eliminate the shortfall that would otherwise trigger the penalty.

What happens if I submit my provisional tax return late?

SARS treats a late submission as a "nil" estimate, meaning the full 20% underestimation penalty typically applies unless actual taxable income is genuinely zero.

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