How Much Support Can You Receive from the R&DTI? Understanding the Mechanics of the R&D Tax Offset

For many businesses, one of the first questions when exploring the R&D Tax Incentive (RDTI) is straightforward one:

How much financial support can we actually receive?

Unlike traditional grants, the RDTI does not provide a fixed funding amount. Instead, it operates through a tax offset mechanism, offering a percentage-based benefit on eligible R&D expenditure already incurred.

Once R&D activities are completed, registered, and successfully claimed through the tax system, businesses may benefit in the following ways:

· Offsetting current income tax liabilities

· Receiving a cash refund (subject to eligibility)

Understanding how this mechanism works allows businesses to more accurately assess the true cost of R&D and incorporate the incentive into both strategic decision-making and financial planning.

1. Core Calculation Logic of the R&D Tax Offset

Under the RDTI framework, the level and type of support primarily depend on a company’s size, determined by aggregated turnover

This is not limited to the revenue of a single entity. It includes the broader economic group, such as:

· Connected entities

· Affiliates

For companies with group structures or ownership links, eligibility thresholds must be assessed on a consolidated basis.

1.1 Small to Medium Enterprises (< AUD 20 million)

Where aggregated turnover is below AUD 20 million and the company is not controlled by income tax-exempt entities, it is generally eligible for a refundable R&D tax offset

The offset is calculated as follows:

Corporate tax rate + 18.5%

For example:

· At a 25% tax rate (a base-rate entity) → 43.5% offset

· At a 30% tax rate → 48.5% offset

It is important to note that this is not a direct grant. It remains a tax offset.

However, where the company does not have sufficient taxable income, the unused portion may be refunded as cash, subject to eligibility criteria.

Note: In certain cases (e.g. where the company is controlled by exempt entities), the offset may not be refundable.

1.2 Large Enterprises (≥ AUD 20 million)

Where aggregated turnover reaches or exceeds AUD 20 million, companies are generally eligible for a non-refundable R&D tax offset.

Key characteristics:

· Cannot be converted into cash

· Can only be used to offset future tax liabilities (carry-forward rules apply)

For larger entities, the incentive rate is linked to R&D Intensity

R&D intensity is typically defined as:

R&D expenditure ÷ Total Expenses

This metric reflects how much of a company’s overall spending is directed toward R&D.

For large companies, the RDTI applies a tiered (incremental) structure:

· Up to 2% intensity:

Corporate tax rate + 8.5%

· Above 2% intensity:

Corporate tax rate + 16.5%

The key point:

Only the portion above the 2% threshold receives the higher rate — not the entire R&D spend.

This structure is designed to incentivise increased and sustained R&D investment, rather than minimal compliance at threshold levels.

2. Illustrative Examples

Example 1: SME Scenario

Assume a technology company with:

· Aggregated turnover: AUD 8 million

· R&D expenditure: AUD 1 million

· Corporate tax rate: 25%

· Eligible for refundable offset

Calculation:

1,000,000 × 43.5% = AUD 435,000

Subject to eligibility, this amount may be used to offset tax or received as a refundable tax offset.

Effective R&D cost (illustrative): AUD 565,000

This is why many businesses view the RDTI as a form of non-dilutive funding.

Example 2: Large Company (Tiered Calculation)

Assume:

· Aggregated turnover: AUD 50 million

· Total expenditure: AUD 20 million

· R&D expenditure: AUD 1 million

· R&D intensity: 5%

Breakdown:

· First 2% (AUD 400,000):

→ Tax rate + 8.5%

· Remaining 3% (AUD 600,000):

→ Tax rate + 16.5%

The offset must be calculated incrementally, rather than applying a single blended rate.

3. The $150 Million R&D Expenditure Threshold

For income years starting on or after 1 July 2021, a key threshold applies:

R&D expenditure threshold: AUD 150 million per annum

Notional deductions up to that level attract the full R&DTI rates.

This is a threshold, not a cap that stops the claim: for the portion of notional deductions above AUD 150 million in an income year, the offset rate is reduced to the company tax rate — the premium falls away, but that portion still attracts an offset.

This ensures the incentive is distributed across a broader range of businesses, rather than concentrated in a small number of very large projects.

4. Eligibility Requirements

The RDTI does not automatically apply to all R&D expenditure. Key conditions typically include:

· The claimant must be an eligible R&D entity (generally an Australian company)

· Activities must qualify as eligible R&D activities (core or supporting)

· Expenditure must qualify as eligible R&D expenditure

· A minimum R&D expenditure threshold of AUD 20,000 in notional deductionsgenerally applies (unless conducted through a registered Research Service Provider)

Ultimately, eligibility depends not just on how much is spent, but whether the activities are technically eligible and compliance-ready.

5. What Does the RDTI Mean for Businesses?

From a financial management perspective, the RDTI can have a meaningful impact on a company’s funding structure:

Cost recovery

A portion of R&D expenditure can be effectively recovered through the tax system, reducing overall project cost.

Cash flow improvement

For SMEs in particular, refundable offsets can generate significant cash inflows to support ongoing development.

Improved return on innovation

Factoring in the RDTI can materially change the ROI profile of R&D investments, making sustained innovation more viable.

Conclusion

The true value of the RDTI lies not in a one-off tax benefit, but in its ability to reshape the cost structure of innovation.

By reducing financial uncertainty, it enables businesses to:

· Plan R&D investment with greater confidence

· Sustain long-term innovation strategies

· Align technical development with financial efficiency

For companies actively engaged in technology development, understanding how the RDTI is calculated is not just a compliance exercise—it is a strategic lever for building durable competitive advantage.

Frequently asked questions

Q: How is the R&D tax offset calculated for a company with under $20 million turnover? A: For companies with aggregated turnover below AUD 20 million, the article states the offset is generally calculated as the corporate tax rate plus 18.5% — so at a 25% tax rate that is a 43.5% offset, and at a 30% rate it is a 48.5% offset. This is a refundable offset where eligible, but eligibility is self-assessed against the criteria, and in some cases (such as control by exempt entities) it may not be refundable.

Q: Do large companies get a cash refund from the R&D Tax Incentive? A: According to the article, companies with aggregated turnover of AUD 20 million or more are generally eligible only for a non-refundable offset, which cannot be converted into cash and can only be used to offset future tax liabilities under carry-forward rules. Whether an offset is refundable or non-refundable depends on your circumstances and is assessed against the eligibility criteria.

Q: How does R&D intensity affect the offset rate for large companies? A: The article explains that R&D intensity is typically R&D expenditure divided by total expenses, and for large companies a tiered structure applies: up to 2% intensity the rate is the corporate tax rate plus 8.5%, and above 2% it is the corporate tax rate plus 16.5%. Importantly, only the portion of R&D spend above the 2% threshold receives the higher rate, so the offset is calculated incrementally rather than as a single blended rate.

Q: Is there a cap on how much R&D expenditure can be claimed under the R&DTI? A: There is a AUD 150 million R&D expenditure threshold per annum, but it is not a cap that stops the claim. Notional deductions up to that level attract the full R&DTI rates; for the portion above it, the ATO states the offset rate is reduced to the company tax rate — so the premium falls away while that portion still attracts an offset.