How Shariah Screening Works: AAOIFI Rules for Australian Investors

Read the fine print of any halal investment product in Australia and one acronym keeps appearing. Hejaz screens its five ASX ETFs 'in accordance with AAOIFI standards'. Salaam certifies its super options against 'Shariah principles set out by AAOIFI'. Meezan Wealth names AAOIFI as its screening framework, applied through IdealRatings. AAOIFI - the Accounting and Auditing Organisation for Islamic Financial Institutions, a Bahrain-based standards body - has become the de facto rulebook for what counts as a halal share.

Yet almost nobody explains what the screens actually test. This article does, so you can understand what your fund manager is doing and check individual shares yourself.

Screen one: what the company does

The first filter is qualitative. A company whose core business is prohibited is out, no matter how healthy its balance sheet. The standard exclusion list, which you will find published nearly verbatim by Hejaz, Salaam and Meezan Wealth:

• Conventional banking, lending and insurance (the business of riba itself)
• Alcohol production and distribution
• Gambling and gaming
• Pork and non-halal food production
• Tobacco
• Weapons and defence
• Adult entertainment and some music and cinema businesses
• Speculative financial activity

The judgment calls live at the edges. A supermarket that sells alcohol as a small fraction of revenue, a hotel chain with bars, an airline serving drinks: these are where the second screen and the revenue threshold come in.

Screen two: the financial ratios

Almost no modern company is perfectly clean. Most hold cash that earns some interest, and many carry some conventional debt. The AAOIFI approach accepts this reality and sets tolerance thresholds. The commonly applied version of the AAOIFI equity screening standard tests three things:

• Interest-bearing debt must stay below 30% of the company's market capitalisation
• Interest-bearing deposits and securities must stay below 30% of market capitalisation
• Income from non-compliant sources must stay below 5% of total revenue

A company inside all three limits is investable for a screened portfolio. Cross a line and the fund must divest, usually within a grace period set by the fund's Shariah board. This is why halal fund holdings change even when nothing happened in the market: a company that raises conventional debt or whose market cap falls (mechanically pushing the debt ratio up) can screen out overnight. Hejaz describes exactly this divestment-and-reinvestment review cycle for its super options, and Salaam publishes a quarterly re-screening commitment with alerts when company activities change.

Screening is not a one-time stamp. A share that was halal when you bought it can stop being halal while you hold it. The question to ask any fund is not whether it screens, but how often, and what happens when a holding fails.

Screen three: purification

The 5% tolerance is a pragmatic allowance, not a blessing. The fraction of income that comes from impure sources still has to leave your pocket. That is purification: calculating the impure share of each dividend and donating it to charity, keeping nothing for yourself, claiming no religious reward for it.

In practice, a screening provider publishes a purification ratio per company. Meezan Wealth is unusually transparent here, publishing a worked example: a holding with a 3.31% purification ratio paying a dividend across ten units generates 0.331 units of income to give away, with purification executed quarterly at the licensee level across portfolios. Salaam describes the same principle for its super options: unavoidable impure income is 'identified and removed from the investment return and donated to charity', overseen by its Shariah advisors, Dar Al Sharia. If you hold individual shares directly, this job is yours - our dividend purification guide walks through it.

Who verifies the screening

Standards need enforcers. In the Australian market, three governance models appear, and knowing which one backs your product tells you how much independent checking is happening:

The strongest setups combine layers: a published standard (AAOIFI), an external certifier, a recurring audit, and published certificates. When you compare products on our investing hub, the Shariah oversight field summarises exactly this.

Applying the screens yourself

For an individual ASX share, the process is manual but doable. Pull the latest annual report. Check the business description against the exclusion list. Then compute the ratios: total interest-bearing debt from the balance sheet against market capitalisation; cash plus interest-bearing investments against market capitalisation; interest income and any non-compliant revenue against total revenue. Do it again each reporting season, because the answer moves. Our step-by-step guide to checking an ASX share works a full example, and the halal stocks hub covers common Australian names.

Two honest caveats. First, screening methodologies differ at the margins: some screeners divide by market capitalisation, others by total assets, and the same company can pass one screen and fail another. AAOIFI is a standard, not the only standard. Second, ratio screens are a scholarly concession designed to make equity investing possible in a world where perfectly clean companies barely exist. Some Muslims prefer tighter screens or direct property precisely because the tolerances sit uncomfortably. Both positions are defensible; what matters is knowing what you own and cleaning what needs cleaning.

Where the thresholds came from, and why they are not sacred

The ratio thresholds are juristic constructions, not Quranic numbers. Scholars derived the one-third-style benchmarks from analogical reasoning - including the well-known prophetic guidance treating one third as the boundary of 'much' in the context of bequests - and settled on operational percentages so that screening could be applied consistently at scale. That history matters for two reasons. First, it explains why different standards bodies and index providers publish slightly different thresholds and denominators: reasonable jurists drew the operational lines in different places. Second, it explains why the thresholds can tighten over time: AAOIFI has revised standards before, and a company passing today's screen may face a stricter one tomorrow. Treat the screen as a floor of acceptability, not a seal of perfection.

A related misconception worth killing: passing the screen does not make a company Islamic. Taiwan Semiconductor is not an Islamic company; it is a permissible investment under a tolerance-based framework. The framework exists because the alternative - excluding every company with any conventional debt or bank deposit - would exclude essentially the entire listed market and lock Muslims out of equity ownership altogether. The scholars who built the screens judged that outcome worse than tolerating small, purified impurities. Understanding that trade-off is what separates informed halal investors from checkbox ones.

Finally, screening is only as good as its data. Ratios are computed from published financials that arrive with a lag; a company can lever up months before its next report shows it. Professional screeners mitigate with continuous monitoring and event alerts - Salaam publishes exactly that commitment - but no system is real-time. This is a second-order risk for a diversified portfolio and a first-order one for concentrated positions, which is one more argument for spreading holdings even within a screened universe.

Screening details verified against provider disclosures on August 5, 2026.