GST Voluntary Deregistration Template and Checklist

Template and checklist for voluntarily cancelling your GST registration when your GST turnover falls below the registration threshold of AUD 75,000 (AUD 150,000 for non-profit bodies). Covers the Division 129 adjustment calculation on retained assets, final BAS lodgement, and the ATO deregistration process. Deregistration is not automatic when turnover drops; you must apply.

Last reviewed: 27 May 2026

Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact ATO. Read our editorial scope →

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What it contains

Combined template letter for ATO notification and a step-by-step checklist covering: turnover calculation to confirm you are below threshold, Division 129 GST adjustment on retained business assets, final BAS preparation and lodgement, deregistration application, and post-deregistration pricing and invoice adjustments.

How to use it

Confirm you are below the threshold

Calculate your current and projected GST turnover (not total revenue). GST turnover excludes input-taxed supplies, non-Australian supplies, and private sales. If your turnover is below AUD 75,000 (or AUD 150,000 for non-profit) and you reasonably expect it to stay below, you are eligible for voluntary deregistration. If you have ceased carrying on an enterprise entirely, deregistration is compulsory.

Calculate Division 129 adjustments

List all business assets you are retaining (equipment, vehicles, stock). For each asset where you claimed GST credits on acquisition, calculate the adjustment under Division 129 of the GST Act 1999. The adjustment amount = original GST credit x (remaining useful life / total useful life). This amount is reported as a GST liability on your final BAS.

Lodge the final BAS

Your final BAS covers the period up to and including your deregistration date. Include any Division 129 adjustments. Account for GST on any supplies made in the final period. Lodge by the normal due date for that period.

Apply for deregistration and update your pricing

Apply online via myGov, ATO Online Services for Business, or through your registered tax agent. Once confirmed, you must stop charging GST on your invoices. Update your price list, website, and invoice templates. You are no longer entitled to claim GST credits on purchases from the deregistration date.

Copy the letter text

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[Your full name / Business name]
  [Your address]
  [City, State, Postcode]
  [Date]

  Australian Taxation Office
  Registrations
  [Relevant ATO address]

  TFN: [Your TFN]
  ABN: [Your ABN]

  Subject: Voluntary cancellation of GST registration

  Dear Sir or Madam,

  I am writing to request cancellation of my GST registration on a voluntary basis. My GST turnover has fallen below the registration threshold and I reasonably expect it to remain below the threshold for the next 12 months.

  1. REGISTRATION DETAILS

  - ABN: [Your ABN]
  - Business name: [Your business name or trading name]
  - GST registration date: [original registration date]
  - Requested deregistration date: [date - the date you want GST to cease]
  - Accounting basis: [cash / accruals]
  - Reporting period: [monthly / quarterly / annually]

  2. TURNOVER CONFIRMATION

  - GST turnover for the 12 months ending [date]: AUD [X]
  - Projected GST turnover for the next 12 months: AUD [Y]
  - Registration threshold: AUD 75,000 [or AUD 150,000 for non-profit]
  - Reason turnover has fallen: [e.g. reduced client base / seasonal business winding down / transitioning to employment]

  3. DIVISION 129 ADJUSTMENTS ON RETAINED ASSETS

  Asset                    GST credit claimed    Adjustment amount
  [e.g. Laptop]            AUD [A]               AUD [B]
  [e.g. Work vehicle]      AUD [C]               AUD [D]
  [e.g. Tools/equipment]   AUD [E]               AUD [F]
  Total adjustment:                               AUD [B+D+F]

  [If no assets retained: "No business assets are being retained. No Division 129 adjustment is required."]

  This adjustment will be reported on my final BAS for the period ending [date].

  4. FINAL BAS

  - Final BAS period: [start date] to [deregistration date]
  - I will lodge the final BAS by [due date].
  - The Division 129 adjustment amount of AUD [total] will be included at label 1A.

  5. CONFIRMATION

  I confirm that:
  - My GST turnover is below AUD 75,000 [or AUD 150,000] and I reasonably expect it to remain below the threshold.
  - I will stop charging GST on supplies from the deregistration date.
  - I will lodge the final BAS for the period up to the deregistration date.
  - I understand I am no longer entitled to claim input tax credits from the deregistration date.

  If you require any further information, please contact me using the details below.

  Yours faithfully,

  [Signature]
  [Printed name]
  [Phone]
  [Email]

  POST-DEREGISTRATION CHECKLIST (delete before sending):

  [ ] Final BAS lodged and any liability paid
  [ ] Invoices and price lists updated (remove GST component)
  [ ] Website pricing updated (GST-exclusive or note "not registered for GST")
  [ ] Accounting software GST settings updated
  [ ] Existing quotes or contracts reviewed for GST clauses
  [ ] Customers notified if they relied on tax invoices for input tax credits
  [ ] ABN remains active (deregistering GST does not cancel your ABN)

  Notes for the sender:
  - Voluntary deregistration: section 25-50, GST Act 1999.
  - Compulsory deregistration (ceased enterprise): section 25-55, GST Act 1999.
  - Division 129 adjustments: Division 129, GST Act 1999.
  - If you later exceed AUD 75,000, you must re-register within 21 days.