ATO Lodgement Calendar for Tax Agents and Accounting Firms
Learn how accounting firms can build an ATO lodgement calendar for BAS, IAS, income tax, FBT, TPAR and client reminders.
This guide is written for Registered tax agents and accounting firms managing ATO lodgement programs. It explains how the obligation fits into Australian public practice, how firms can plan lodgement deadlines before they become urgent, and how client reminders, workflow ownership and practice management routines can reduce compliance risk.
Key dates and timing considerations
Due dates are only useful when the firm turns them into a working system. Australian accounting firms need to know the statutory or ATO lodgement deadline, but they also need earlier internal workflow dates for record collection, preparation, manager review, partner review, client approval and final lodgement.
- ATO lodgement dates depend on obligation type, reporting frequency and tax agent program rules.
- Firms should maintain client-level due dates rather than relying only on generic date lists.
- Internal workflow dates should be earlier than ATO lodgement deadlines.
ATO lodgement calendar for multi-entity groups
Choose a financial year to generate a realistic recurring program. Quarterly BAS entities receive all four quarters, monthly BAS entities receive all 12 periods, and annual obligations are carried through to their relevant due dates.
August 2026
September 2026
October 2026
November 2026
December 2026
January 2027
February 2027
March 2027
April 2027
May 2027
June 2027
July 2027
August 2027
May 2028
The selected year represents the reporting financial year, so June-period and annual lodgments may fall after 30 June. Template dates are examples for planning and adjust weekends only. Registered tax agents should verify public holidays, ATO lodgment program concessions and client-specific due dates before relying on any entry.
How to operationalise this inside an accounting firm
The most effective firms treat this topic as part of a wider compliance operating rhythm, not as an isolated date in a diary. A partner, director or manager should be able to open one view and see which clients are affected, which due dates are coming up, which reminders have been sent, which work is waiting on the client and which lodgements are at risk. That visibility is what turns a tax calendar into a practice management tool.
For public practice teams, the first step is to define ownership. Every client should have a responsible manager or staff member, and every recurring obligation should have a clear workflow path. That path normally includes information requested, information received, preparation started, manager review, partner review, client approval and lodged. Smaller firms may use fewer stages, but the principle is the same: the firm needs a shared language for progress.
Client communication
Client reminders should be specific, early and consistent. A useful reminder explains what the firm needs, when it is needed, what the client should do next and why the timing matters for ATO compliance or the relevant lodgement deadline.
Manager visibility
Managers need more than a list of dates. They need to know which clients have not responded, which jobs are unassigned, which obligations are approaching review and where workflow capacity is becoming tight across the team.
This is especially important when a firm is moving away from a spreadsheet. Spreadsheets can record due dates, but they rarely create reliable accountability. They do not automatically show whether a client reminder was sent, whether a manager changed, whether an email bounced, or whether a lodgement is still waiting for approval. A structured compliance workflow gives the team a better way to manage recurring deadlines without relying on memory or inbox archaeology.
Model your firm's ATO lodgement calendar below
Rather than just describing what an ATO lodgement calendar should look like, the template below builds one. Pick a financial year and it lays out a realistic BAS, IAS, FBT, TPAR, STP and income tax return program across a multi-entity group — the same structure TaxCalendar generates automatically from a firm's real client data, not a template someone has to build and maintain by hand.
The registered tax agent lodgment program is what makes an ATO lodgement calendar different from a generic date list: concessional due dates depend on the specific client and obligation, not a public holiday calendar. That's the detail a shared, client-level lodgement calendar needs to get right.
For a public practice, the operational risk is rarely the date itself. The risk is that no-one owns the follow-up, the client reminder is sent too late, the manager cannot see what is stuck, or the team is using a spreadsheet that is no longer trusted. TaxCalendar is designed to connect due dates, client reminders, workflow ownership and compliance visibility in one place.
Downloadable calendar template
Use the calendar template on this page to model multiple entities with BAS, IAS, FBT, TPAR, STP and income tax return obligations. It's a sample, but it shows exactly what TaxCalendar builds automatically for real firms — inside the app, every client gets this same lodgement calendar generated from their actual recorded obligations, not a template someone has to fill in and maintain by hand.
Calendar import options
Download the sample as an .ics calendar file for calendar apps or as a CSV file for spreadsheet planning and review. Inside TaxCalendar, firms can generate the same ICS, styled PDF or CSV export for any real client or the whole firm at once, straight from live obligation data, and email it directly to the client from within the app. For the client, that means one clear calendar of what's due and when, instead of piecing it together from separate reminder emails — the same clarity this page's sample gives you, but personalised, automatic and sent on their behalf.
Keeping concessional dates current
Lodgment program concessions aren't static — eligibility can change if a client's lodgement history changes, and the program dates themselves are reissued each year. A calendar built once at onboarding and never revisited will quietly drift out of date.
Firms should review ATO program dates annually and update internal templates before the new compliance year starts, rather than assuming last year's concessional dates still apply to this year's clients.
Connecting ATO dates to client communication
A lodgement calendar is more useful when it connects to reminders. If a BAS is due soon but the client has not supplied records, the system should make that obvious. If a return is prepared but awaiting signature, the reminder should say that instead of sending a generic information request.
Recommended reminder and workflow cadence
A strong compliance process separates client communication from internal work allocation. Tax agents can use client reminders at 30, 14, 7, 2 and 0 days before the due date, while managers use earlier workflow dates to check whether records have arrived, preparation has started and review is on track.
This matters because lodgement deadlines are rarely missed for one dramatic reason. They are missed because small items stay hidden: a missing email address, an unassigned manager, a client who has not approved the work, or an obligation sitting in a spreadsheet that only one person trusts. TaxCalendar is built to make those issues visible before they become deadline pressure.
Where TaxCalendar fits
TaxCalendar helps Australian accounting firms turn compliance dates into a visible workflow. Firms can track clients, obligations, due dates, manager ownership, reminder status and lodged status in one place. That gives public practice teams a practical operating layer for BAS, IAS, ATO lodgement calendars, annual returns, client reminders and recurring practice management routines.
Related questions
Is an ATO lodgement calendar the same as a tax calendar?
Not exactly. An ATO lodgement calendar focuses on ATO obligations, while a broader tax calendar may include super, payroll tax and firm-specific compliance work.
Do tax agents get different due dates?
Registered tax agents may receive concessional dates through the ATO lodgment program, depending on the obligation and client.
Can TaxCalendar support an ATO lodgement calendar?
Yes. TaxCalendar helps firms track ATO obligations, due dates, reminders and workflow ownership.
Sources
Facts and figures in this guide are drawn from the following official sources. Rates and thresholds are indexed periodically, so always confirm current amounts before quoting them to a client.