I Crossed the GST Threshold Without Realising — Can I Register Late Without Penalty?
GSTZone Desk · Updated 2026
Short answer
Registering now is absolutely the right move — but ‘without penalty’ isn’t guaranteed. You’re legally required to register within 30 days of crossing the threshold; being two months past that means you may already be liable, as an unregistered taxable person, for GST on supplies made since you crossed the line, with a real (though not automatic) exposure to penalty under Section 122.
In detail
The honest answer here has two parts, and it’s worth not glossing over either one. First, the good news: registering now, even late, is unambiguously better than continuing to delay — every additional week of non-compliance only adds to the eventual exposure, it doesn’t reduce it.
Second, the harder truth: the law doesn’t automatically forgive the gap just because you register voluntarily before being caught. Technically, you were liable to collect and pay GST on supplies made from the date you actually crossed the threshold — not from whenever you eventually register. If that liability is ever assessed, it can come with interest, and potentially a penalty under Section 122(1) for failure to obtain registration when required.
That said, coming forward voluntarily and registering promptly, rather than being caught by the department later, is generally viewed far more favourably in practice — both in terms of how any eventual scrutiny plays out, and simply in terms of stopping the exposure from growing further.
GSTZone tip
Register immediately, and separately work out — with a GST professional if the numbers are meaningful — what your actual liability looks like for the gap period, so you can proactively address it (through voluntary payment with interest) rather than waiting for the department to raise it as a demand later.
Related questions
Will I be asked to pay GST on sales I made before I register, from customers I never charged GST to?+
This is a genuine, difficult practical issue — if you didn’t collect GST from customers during the gap period, the liability still technically falls on you to pay from your own funds, which is exactly why closing this gap quickly matters.
Does voluntarily coming forward reduce the penalty amount?+
There’s no automatic statutory discount purely for volunteering, but genuinely proactive, good-faith compliance tends to be viewed more favourably than being caught through a department audit, both practically and often in how any penalty proceeding unfolds.
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