How many days until the next tax filing deadline?

The answer depends on which Australian tax obligation you mean. For most individuals, the key date is 31 October, the usual deadline for lodging a personal income tax return without a registered tax agent. Businesses may instead be working towards a BAS due date, a company return deadline, or an instalment date set by the Australian Taxation Office (ATO).

A reliable countdown starts with the correct deadline, the current date, and the type of days being counted. HowManyDaysIn.com can help compare calendar days with weekdays, account for leap years, and check the number of days between two dates without relying on rough month-by-month estimates.

Identify the tax date that applies

The Australian financial year runs from 1 July to 30 June. After the end of the financial year, individuals generally have until 31 October to lodge their tax return if they manage it themselves. This date is especially relevant for employees in Sydney, Melbourne, Brisbane, Perth and other cities who receive income statements through their myGov account.

The date can change when a registered tax agent handles the return. Tax agent clients may receive a later lodgment date under the ATO’s lodgment program, provided they meet the relevant conditions and engage the agent before the standard deadline. A late return, outstanding debt, or previous compliance issue can affect the arrangement, so the date shown by the ATO or the agent should take priority.

Count calendar days to the deadline

To find how many days remain, enter today’s date as the starting point and the applicable filing date as the end point. A calendar-day countdown includes Saturdays, Sundays and public holidays. If there are 40 calendar days left, that period includes every date in the interval, not just the days when government offices or tax professionals are open.

The exact counting convention matters. Some calculators count the starting date, while others count the number of midnight-to-midnight intervals before the deadline. For practical planning, treat the due date as the final day to lodge and avoid leaving submission until the last evening, when an internet outage, missing receipt or myGov problem could create unnecessary risk.

Check business days separately

Tax work often depends on business days rather than ordinary calendar days. A business-day calculation normally excludes Saturdays and Sundays, and may also exclude Australian public holidays. This is useful when estimating how long remains to contact an accountant, request an income statement, obtain a payment arrangement or resolve an ATO message.

Public holidays vary between states and territories. A Melbourne taxpayer may need to account for Victorian holidays that do not apply in Queensland, while a business in Sydney may follow New South Wales dates. If an official due date falls on a weekend or public holiday, Australian government rules may move the effective deadline to the next business day, but the ATO’s published date remains the authoritative source.

Allow for the financial year structure

The tax deadline is tied to the Australian financial year rather than the calendar year. Income earned in July belongs to a different tax period from income earned in June, even though both months sit within the same calendar year. This distinction matters for salary, interest, dividends, rental income, capital gains and deductions.

Many Australians organise records around the end of financial year, often called EOFY. Employers finalise income information, banks report interest, and investment platforms provide annual statements around this period. Waiting for every document can shorten the useful preparation window between 30 June and 31 October, so gathering receipts and work-related expense records earlier can make the countdown more meaningful.

Remember leap years and month lengths

A date countdown cannot assume that every year has 365 days. A Gregorian leap year has 366 days because February contains 29 days. The usual rule is that a year divisible by four is a leap year, except century years that are not divisible by 400. For a broader explanation of how year length is defined, see this discussion of calendar year length.

Leap years can affect a countdown that crosses February. For example, a period extending from late January to early March contains an extra day in a leap year. Month lengths also vary: April, June, September and November have 30 days, while January, March, May, July, August, October and December have 31. February has 28 or 29 days.

Separate tax returns from BAS deadlines

A personal income tax return is different from a business activity statement. Registered businesses may lodge BAS quarterly, monthly or annually, depending on their reporting cycle and circumstances. Quarterly BAS periods commonly relate to September, December, March and June, with lodgment and payment dates set by the ATO.

Small businesses in Adelaide, Canberra or regional areas may also have GST, PAYG withholding or superannuation obligations that fall on different schedules. A countdown to 31 October will not necessarily reflect the next obligation for a sole trader, company or employer. Use the notice, reporting cycle or ATO online account connected with the specific obligation before calculating the remaining time.

Build a practical preparation window

The filing deadline is only one date in the process. A useful plan includes an earlier document-gathering date, a review date and a buffer before lodgment. Employees may need payment summaries, private health insurance information, work-related expense records and details of investment income. Landlords and investors may need rental statements, interest records, depreciation information or capital gains documents.

A simple calendar reminder can be set several weeks before 31 October, with another reminder seven days before the due date. People using a tax agent should make contact well before the deadline, especially during the busy period after EOFY. Digital records stored in a clear folder can also reduce the chance of overlooking a receipt while travelling, working remotely or managing a household budget.

Use the right countdown for your situation

A calendar-days countdown is best for seeing the total time remaining until a tax date. A business-days countdown is better for estimating how many working days are available to prepare documents or obtain professional help. Comparing both figures gives a clearer picture than relying on a single number.

The most dependable approach is to confirm the obligation with the ATO, identify the official lodgment date, and then calculate the interval from today. Enter the two dates into a calendar calculator, check whether February includes 29 days, and allow a buffer before electronic lodgment.

Check the relevant ATO deadline now, then use HowManyDaysIn.com to count the remaining calendar or business days and organise your tax records before the final filing date.