GST utility

GST Time of Supply and Tax-Date Calculator

Identify the likely tax date for forward-charge goods/services, reverse charge, vouchers and rate-change cases.

Determine likely time of supply

Continuous supply, associated enterprises, change in tax rate and excess advances can alter the result.
Likely time of supply
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Rule applied
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Educational calculator · Reviewed 14 July 2026 · Official law, portal data and professional judgement prevail. Methodology Editorial policy Legal and disclaimer