21 December 2018
November 2018 monthly activity statement – due date for lodging and payment.

15 January 2019
2018 tax returns for taxable large/medium entities as per the latest year lodged (all entities other than individuals), unless required earlier. Due date for lodging. Payment was required 1 December 2018 for companies and superfunds. For trusts, the due date for payment is stated on their notice of assessment.
https://www.ato.gov.au/

21 January 2019
December 2018 monthly activity statement – due date for lodging and paying for business clients with $10 million turnover or more.

28 January 2019
Employers must make super guarantee contributions for quarter 2 to the funds by this date.

31 January 2019
TFN reports for closely held trusts if any beneficiary quoted their TFN to a trustee in quarter 2, 2018-19 – due date for lodging.

21 February 2019
December 2018 monthly activity statement – due date for lodging and paying for business clients with up to $10 million turnover.
January 2019 monthly business activity statement – due date for lodging and paying.

28 February 2019
December 2018 quarterly activity statement – due date for lodging and paying.
Payment for December 2018 quarterly instalment notice due date. Lodge the notice only if you re varying the instalment amount.
2018 Annual GST return – due date for lodging and paying if the tax payer does not have a tax return obligation.
Employers must lodge and pay the December 2018 Superannuation guarantee charge statement - quarterly if the employer did not pay enough contributions on time.

21 March 2019
February 2019 monthly business activity statement – due date for lodging and paying.

31 March 2019
2018 tax returns for companies and super funds with total income of more than $2 million in the latest year lodged (excluding large/medium taxpayers). Due for lodging and paying unless the return was due earlier.
2018 tax returns for individuals and trusts whose latest return resulted in a tax liability of $20,000 or more, excluding large/medium trusts. Due for lodging. The due date for payment is stated on their notice of assessment.

21 April 2019
March 2019 quarterly PAYG instalment activity statement for head companies of consolidated groups - due date for lodging and paying.
March 2018 monthly business activity statement – due date for lodging and paying.

28 April 2019
March 2019 quarterly business activity statement – due date for lodging and paying if lodging by paper.
Payment for March 2019 quarterly instalment notice due date. Lodge the notice only if you re varying the instalment amount.
Employers must make super guarantee contributions for quarter 3 to the funds by this date.

30 April 2019
TFN reports for closely held trusts if any beneficiary quoted their TFN to a trustee in quarter 3, 2018-19 – due date for lodging.
Lost members report for the period 1 July 2018 to 31 December 2018 – due date for lodging.

15 May 2019
2018 tax returns for all other entities that did not have to lodge earlier (including all remaining consolidated groups) and are not eligible for the 5 June 2019 concession. Due date for lodging and payment if required.

21 May 2019
April 2018 monthly business activity statement – due date for lodging and paying.
Final date to add new FBT clients to your client list to ensure they receive the lodgment and payment concessions for their fringe benefits tax returns.

26 May 2019
March 2019 quarterly activity statement – due date for lodging and paying if lodging electronically. 

28 May 2019
2018 Fringe Benefits Tax annual returns – due date for payment.
Employers must lodge and pay the March 2019 Superannuation guarantee charge statement - quarterly if the employer did not pay enough contributions on time.

5 June 2019
Due date for lodging and paying 2018 tax returns for all entities with a lodgement due date of 15 May 2019 if the tax return is not required earlier and both of the following criteria are met:
- non-taxable or a credit assessment in latest year lodged
- non–taxable or receiving a credit assessment in the current year.
2018 tax returns for individuals and trusts with a lodgement due date of 15 May 2019 provided they also pay any liability due by this date. Due date for lodging and paying.

21 June 2019
May 2019 monthly business activity statement. - due date for lodging and paying

25 June 2019
2019 Fringe Benefits Tax annual return – due date for lodging for tax agents lodging electronically. The due date for payment (if required) was 28 May 2019.
Employers must make super guarantee contributions for quarter 1 to the funds by this date.

30 June 2019
Employers must make super guarantee contributions by this date to qualify for a tax deduction in the 2018-19 financial year.