E-invoicing and the IRP: do small businesses actually need it

E-invoicing gets discussed as though it applies to every registered business, which creates unnecessary worry for smaller ones. In reality it is mandatory only once aggregate turnover crosses a government-notified threshold, and that threshold has been lowered gradually over several years rather than applying to everyone from the start.

What e-invoicing actually changes

Above the threshold, business-to-business invoices need to be reported to the Invoice Registration Portal, which validates the invoice and returns a unique Invoice Reference Number and a QR code. That IRN and QR code then need to appear on the invoice for it to be considered valid under the e-invoicing rules.

If you are below the threshold

A standard GST-compliant invoice, with the usual fields and the correct tax split, remains fully valid. There is no benefit to manually registering invoices on the portal if your turnover does not require it, and no penalty for not doing so.

What to check if you are near the threshold

• The current notified turnover threshold, since it has changed more than once
• Whether your invoicing tool can generate the IRN and QR code automatically
• Whether the requirement applies to business-to-business invoices only, which is the common structure

This is not legal advice, and thresholds are revised periodically. If your turnover is approaching the current limit, confirming the exact figure and effective date with a chartered accountant avoids either scrambling late or registering invoices unnecessarily early.

Standard GST-compliant invoicing, ready today regardless of your turnover — see Paxbil for small business