Payday Super Is a Working Capital Stress Test for R&D Startups

By Alex Knight, Founder and CEO, Advanced

Payroll has gone real-time. Startup cash receipts have not.

From 1 July 2026, Payday Super requires employers to fund super contributions in lockstep with each pay cycle, reaching funds within seven business days. The quarterly float that startups have historically used to smooth cashflow is gone. Payroll-related cash now leaves the bank up to 52 times a year instead of four.

This is not a compliance change. It is a structural liquidity change.

The compliance framing suggests you update your payroll software and carry on. The liquidity framing requires you to rethink your cashflow architecture entirely. For R&D-investing startups, that rethink has a specific shape: your super obligations are now real-time, and your RDTI refund still isn't.
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The median R&D refund timeline is not a safe planning assumption

Advanced analysed almost 300 observed R&D refund events. The overall median was 13 days after the income tax return was processed. That number looks manageable until you look at the tail.

25% of refunds took more than 25 days. 20% took more than 30 days. 10% stretched beyond 48 days.

The size of the refund compounds the problem. Refunds below $250,000 had a nine-day median. For claims of $1 million or more, the median was 47 days, with 77% taking over 30 days and none arriving within the seven-day super window. The companies with the largest payroll obligations are waiting the longest for the R&D capital that would cover them.

Recent timing cannot be extrapolated from prior years either. The dataset median increased from nine days in FY24 to 16 days in FY25. ATO processing times are slowing, not speeding up.

You need to plan accordingly.

Expected entitlement is not available cash

A company can be entirely solvent on paper and still miss a Payday Super run.

In 37% of observed refund events, the cash received was below the gross tax credit on the return. The median shortfall was 16.5%, reflecting ATO offsets applied against PAYG or GST liabilities. Founders planning on the gross refund number are frequently planning on a number that will not arrive in full.

Employment Hero research suggests 40% of Australian businesses expect Payday Super to impact cashflow to the point they will need external credit. Xero found almost one in three small business owners expect to dip into personal savings or borrow money to meet obligations.

The planning assumption to use is the net likely receipt after possible ATO offsets, not the gross refund your adviser calculated. Reconcile both your Income Tax Account and Integrated Client Account before you rely on an expected refund to fund anything time-sensitive.

What the playbook looks like

82% of small businesses anticipate needing to delay or reduce expansion plans in 2026 because of this reform. For venture-backed founders, that trade-off is not on the table. Growth remains the directive. This shift requires internal optimisation of liquidity architecture, not growth degradation.

Five things matter most for R&D-investing founders navigating this environment.

Forecast R&D cash receipts on the 75th percentile, not the median. Plan for 25 days and stress-test for 50. The companies that get caught are the ones that planned on 13 days and experienced the tail.

Stress-test the 13-week cash forecast for a 50-day delay in major receipts. If a 50-day delay breaks the cashflow model, the model needs fixing before the delay arrives.

Model the net receipt, not the gross entitlement. The 16.5% median ATO offset shortfall is large enough to change your cashflow position materially. Know what's sitting in your integrated client account before you count on the gross number.

Ring-fence super and wages from uncertain inflows. Payday Super obligations are fixed and non-negotiable. Working capital receipts are not. Never let one depend on the other arriving on time.

Arrange contingent funding before you need it. For R&D-investing founders, early access to the anticipated RDTI refund removes the timing dependency entirely. Capital advanced against accrued eligible spend arrives on your schedule, not the ATO's. Super gets funded. The build continues.

With the quarterly buffer now gone, the runway does not have to be.

What your real runway looks like right now

The way most founders calculate runway doesn't account for any of this.

Standard runway is cash in bank divided by monthly burn. That's the number most people look at. It doesn't include the RDTI refund accruing each month as a near-term receivable, and it doesn't account for the Payday Super outflow that now sits inside the burn figure in real time.

Adjusted runway, which includes the accrued RDTI refund, is usually a materially different number. For a company spending $640,000 on eligible R&D with $320,000 in the bank burning $80,000 per month, standard runway is four months. Adjusted runway is 7.5 months.

That three-and-a-half month gap is the difference between a capital raise and a cashflow strategy.

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See how Payday Super affects your specific cashflow position:

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Enter your payroll frequency, headcount, average salary, and expected RDTI refund to see your real-time super obligation against your anticipated refund timeline.

How R&D financing closes the gap

Understanding the timing problem is the first step. Solving it is the second.

Advanced advances the anticipated RDTI refund before the ATO processes the claim, based on your year-to-date eligible spend and your adviser's comfort letter. No equity. No monthly repayments. Repaid when the refund arrives.

For a company with $600,000 in eligible R&D spend, that's up to $261,000 available now rather than in October. Super gets funded from operating cashflow. The capital that arrives early can be reinvested into eligible R&D before 30 June, generating its own 43.5% offset. The program compounds.

For the full mechanics of how early access works and how the flywheel runs, see the R&D Tax Incentive capital strategy guide.