R&D Tax Incentive Registration Deadline
Miss the AusIndustry registration deadline and your entire RDTI claim for that year is void. No exceptions, no discretion. Here is how to calculate your exact deadline, what happens if you miss it, and how to apply for an extension if time is running short.
The 10-Month Rule Explained
Under section 27A of the Industry Research and Development Act 1986, every company claiming the R&D Tax Incentive must register its R&D activities with AusIndustry within 10 months of the end of its income year. This is the 10-month rule, and it is the most consequential deadline in the entire RDTI process.
The clock starts on the last day of your income year. For most Australian companies with a standard 30 June financial year-end, this means the deadline falls on 30 April the following year. For the FY2025-26 income year (ending 30 June 2026), the registration deadline is 30 April 2027.
Registration is retrospective. You cannot register R&D activities for a year that has not yet ended; the activities must have been conducted within the completed income year. This means companies are always working backwards, documenting and registering activities that have already occurred. That is precisely why the deadline catches companies off guard: the financial year ends, focus shifts to operations, and suddenly three months remain to assemble a complete registration.
The legislative basis matters because it determines who has authority to grant relief. AusIndustry administers the deadline and has no broad statutory power to accept late registrations outside specific extension provisions. The ATO similarly has no authority to retrospectively validate a registration that was not lodged on time. For a broader overview of the registration process, see our guide to how the RDTI claim process works.
Calculating Your Deadline
The calculation is simple: add 10 calendar months to the last day of your income year. The table below covers the most common year-end dates for Australian companies. If your year-end falls outside these examples, count forward exactly 10 months from your closing date.
| Income year end | Registration deadline | Example (FY2025-26) |
|---|---|---|
| 30 June (standard) | 30 April | 30 April 2027 |
| 31 December | 31 October | 31 October 2026 |
| 31 March | 31 January | 31 January 2027 |
| 30 September | 31 July | 31 July 2026 |
Non-standard year-end companies face a particular risk: their deadlines do not align with the 30 April date that most industry commentary references. A company with a 31 December year-end has its deadline in October of the same calendar year as the year-end, meaning less total runway before the cutoff. For expenditure rules and how the claim works once registration is complete, see our R&D Tax Incentive guide.
✅ YOUR DEADLINE IS MANAGEABLE IF:
- You have confirmed your income year-end date and calculated 10 months from that exact date
- Your contemporaneous R&D documentation was maintained throughout the year, not assembled retrospectively under deadline pressure
- You have engaged a consultant or set internal milestones at least 3 to 4 months before the deadline
- You have clarity on which activities are core R&D activities and which are supporting, so registration descriptions can be drafted without delay
- Your ATO tax agent has confirmed no outstanding issues with your company's tax standing that could complicate the claim
❌ YOUR DEADLINE IS AT RISK IF:
- You assumed your deadline was 30 April without confirming your actual income year-end date
- R&D activities were never formally separated from routine development work, meaning the registration scope is unclear
- Documentation was not kept during the year, requiring retrospective reconstruction under time pressure
- Internal approvals, board sign-offs, or external consultant availability have not been confirmed within the available timeline
- Your company recently changed its financial year, creating uncertainty about which year-end date governs the current registration period
What Happens If You Miss the Deadline
Missing the registration deadline produces a single definitive outcome: your RDTI claim for that income year is invalid. AusIndustry cannot accept the registration, the ATO cannot apply the offset, and there is no administrative mechanism to recover the claim for that year. It does not matter how much you spent on R&D, how well-documented your activities were, or how clearly eligible your work was. A late registration is treated as no registration.
The financial consequences are straightforward to quantify. A company with $500,000 in eligible R&D expenditure and aggregated turnover under $20 million would receive a 43.5% refundable offset totalling $217,500. Missing the registration deadline means that $217,500 is gone for that year. There is no ability to carry the offset forward or recover it through a future year's claim. For context on offset rates and what counts as eligible expenditure, see our R&D Tax Incentive eligibility guide.
Missing one year does not affect eligibility to claim in future years. The RDTI is assessed separately for each income year, and a missed registration in FY2024-25 has no bearing on a valid claim in FY2025-26, provided registration is on time for the subsequent year. The loss is real but contained to that specific year.
If you have already missed the deadline
If the deadline has already passed, options are very limited. There is no general appeal mechanism or administrative waiver. The only path worth exploring is an extension application under the provisions described below. That application must be lodged as soon as possible after the missed deadline, and it only has any realistic prospect of success in genuinely exceptional circumstances.
For future years, the correct response is to implement a process that ensures registration happens well before the deadline: assign clear internal ownership, engage a consultant early, and set structured milestones at 6, 3, and 1 month before the cutoff to confirm progress.
If you are close to the deadline
If your deadline is within 4 to 6 weeks and registration has not yet begun, treat it as urgent. AusIndustry registrations involving multiple activities, complex expenditure allocation, or overseas R&D components require substantially more preparation time than companies typically expect.
Engage a specialist immediately. A lodged registration with minor imperfections is recoverable through a variation. A missed deadline is not. Contact us directly if time is critical and see how we handle expedited registrations in our RDTI claim process guide.
How to Apply for an Extension
AusIndustry has a limited statutory power to grant extensions to the registration deadline, but extensions are not routinely approved. Understanding the framework accurately gives you a realistic picture of your options without false hope or unnecessary panic.
The Extension Framework
Under the Industry Research and Development Act 1986, AusIndustry can accept a registration outside the standard 10-month window in limited circumstances. The total extension available is up to 92 days beyond the statutory deadline. Beyond 92 days, no extension is possible under any circumstances.
Short extensions of up to 14 days, requested before the deadline expires, are typically granted when supported by adequate documentation. Extensions beyond 14 days require strong evidence of circumstances that genuinely prevented timely registration, and even then approval is not guaranteed.
How to Submit the Request
Extension requests are submitted through the R&D Tax Incentive customer portal on business.gov.au. The application requires:
- A clear explanation of the specific reasons for the delay
- Supporting evidence for the circumstances described (documentation, correspondence, medical certificates where relevant)
- Confirmation of whether prior extension requests have been made for the same entity and income year
- The specific additional period being requested
Submit the request as early as possible, ideally before the deadline or immediately after it passes. AusIndustry does not guarantee processing times, and waiting until the end of the 92-day window leaves almost no room for a response before all options close.
What AusIndustry Considers
AusIndustry assesses extension requests against several factors:
- Whether the delay was caused by circumstances outside the company's reasonable control
- The strength and quality of the supporting evidence provided
- Whether the company has previously requested extensions for the same income year
- Whether the company took all reasonable steps to meet the deadline given its circumstances
- Any related pending decisions that might affect the registration
✅ EXTENSION MORE LIKELY TO BE GRANTED WHEN:
- The delay was caused by circumstances genuinely outside your control, such as serious illness, a declared natural disaster, or a verified system failure on the lodgment platform
- You are applying for a short extension of 14 days or less before the deadline has passed
- You have strong documented evidence of the circumstances and of your attempts to lodge on time
- You have not previously requested extensions for the same entity and income year
- The application is submitted promptly, not at the very end of the 92-day window
❌ EXTENSION UNLIKELY TO BE GRANTED WHEN:
- The reason is that your consultant was unavailable, documentation was not ready, or you were unaware of the deadline
- You are applying well after the deadline with no exceptional circumstances to support the request
- The company has previously been granted extensions for the same income year
- The 92-day post-deadline window has already closed
- The request relates to an advance overseas finding, for which the extension power does not apply
How We Help You Stay On Time
The registration deadline is a mechanical problem with a straightforward solution: start early, assign ownership, and build a process. We handle the process so the deadline never becomes a crisis.
Deadline Tracking From Day One
We calculate your exact registration deadline at the start of each engagement and set internal milestones at 6 months, 3 months, and 4 weeks before it arrives. You receive scheduled reminders at each milestone, not a surprise when time runs out.
Registration Preparation
We draft your AusIndustry registration descriptions, gather and verify expenditure data, and prepare supporting documentation in structured stages throughout the year rather than in a last-minute scramble near the deadline.
Contemporaneous Documentation
We help you implement record-keeping frameworks at the start of your R&D program so that registration preparation is an assembly of existing materials, not a retrospective reconstruction under time pressure.
Urgent Registrations
If your deadline is within 4 weeks and registration has not yet started, we can work to an expedited timeline. A lodged registration with minor imperfections is recoverable through a variation. A missed deadline is not. Contact us immediately if time is critical.
Registration Deadline FAQs
What is the deadline for a company with a non-standard financial year?
The deadline is always 10 months after the end of your income year, regardless of when that falls. A company with a 31 December year-end has its deadline on 31 October. A 31 March year-end gives a 31 January deadline. The 10-month rule applies universally; only the specific date changes based on your year-end. Non-standard year-end companies should be especially careful because the widely cited 30 April date does not apply to them.
Can I register my R&D activities before my income year ends?
No. Registration is retrospective, covering activities conducted during a completed income year. A company with a 30 June year-end can only register its FY2025-26 activities from 1 July 2026 onwards, with the deadline of 30 April 2027. This is one reason why documentation during the year matters so much: the registration window opens only after the year closes, and the clock is already running from that moment. Strong contemporaneous records, kept throughout the year, make it far easier to register quickly once the window opens. See our eligibility guide for what records AusIndustry requires.
What if my AusIndustry registration was on time but my tax return was filed late?
The AusIndustry registration deadline and the ATO tax return lodgment are entirely separate obligations. If your registration was submitted on time but your tax return was lodged late, the RDTI registration remains valid. The late tax return may attract separate ATO penalties, but it does not invalidate an on-time registration. The 10-month rule applies only to the AusIndustry registration step, not to the R&D tax schedule or tax return lodgment.
Do the 2028 RDTI reforms change the registration deadline?
The 10-month registration deadline is not changing under the reforms announced in the May 2026 Federal Budget, which take effect from 1 July 2028. What changes under those reforms is the offset rate for core activities (rising from 43.5% to 48%), the minimum eligible expenditure threshold (increasing from $20,000 to $50,000), and the refundable offset eligibility criteria. The procedural mechanics of the 10-month registration deadline remain unchanged.
Do not leave your registration to the last minute
The AusIndustry deadline is firm and carries no automatic grace period. If you are not certain of your exact deadline or your registration is not yet underway, get in touch now. A conversation costs nothing. A missed deadline costs everything.
Speak to a consultant