AAOIFI Shariah Screening Ratios: A Singapore Investor's Complete Guide

AAOIFI Shariah screening applies three financial ratio tests to every listed company. The debt ratio requires interest-bearing debt below 30% of total assets. The liquidity ratio requires cash and interest-bearing securities below 30% of total assets. The revenue threshold requires non-halal income below 5% of total revenue. A company must also pass a business activity screen first. Those that pass all four tests are permissible for Muslim investors to hold. Those that fail require purification of any income already received or full liquidation within a 90-day grace period.

What Is AAOIFI and Why Does It Matter?

The Accounting and Auditing Organisation for Islamic Financial Institutions (AAOIFI) was established in Bahrain in 1991. It now has over 200 member institutions across 45 countries, including central banks, regulatory bodies, and leading Islamic financial institutions. Its Shariah standards are the closest thing to a globally accepted rulebook for Islamic finance.

When a Muslim investor in Singapore asks whether a stock is halal, the answer depends on which screening methodology you apply. AAOIFI's methodology is the most widely cited international standard. Understanding it matters because the alternative, relying on a rough sense that a company "sounds permissible," leads to portfolios that will not survive scrutiny.

AAOIFI screening is also the basis used by most Islamic fund managers operating in Singapore. If you hold a Shariah-compliant unit trust or ETF locally, the fund almost certainly applies AAOIFI or a methodology derived from it.

Stage 1: Business Activity Screen

Before any financial ratio is checked, a company must pass a business activity screen. Certain sectors are excluded outright, regardless of how clean the balance sheet looks. This is because the source of the income is itself prohibited.

Companies in the following sectors are excluded entirely from a Shariah-compliant portfolio:

• Conventional banking and financial services (interest-based lending)
• Conventional insurance (interest-based, with gharar)
• Alcohol production, distribution, or retail
• Tobacco
• Weapons and defence manufacturing
• Gambling, lotteries, and casino operations
• Pork and non-halal food production
• Adult entertainment

A technology company, a healthcare firm, a logistics group, a consumer goods brand: these pass the business activity screen by default. A conventional bank does not, regardless of its profitability or dividend yield.

Conglomerates with diversified business lines require closer reading. If a company earns 60% of revenue from a permissible food business and 40% from conventional insurance, it fails the screen. The prohibited segment disqualifies the whole entity.

Stage 2: Financial Ratio Screen

Once a company passes the business activity screen, three financial ratios are checked. All three thresholds must be met simultaneously. Passing two out of three is not sufficient.

Ratio 1: Debt Ratio (30% Threshold)

Rule: Total interest-bearing debt must be less than 30% of total assets.

This screens out companies with excessive reliance on interest-based borrowing. When you own shares in a company, you own a proportional claim on its assets and liabilities. A company with 40% of its assets funded by conventional, interest-bearing debt means you are, as a shareholder, indirectly participating in riba.

Example: A Singapore property developer has total assets of S$2 billion and S$700 million in bank loans at conventional interest rates. The debt ratio is 35% (700 divided by 2,000). It fails this screen.

The 30% threshold acknowledges that most large companies carry some debt. It draws the line at excessive reliance on interest-based financing. A company with S$200 million in debt against S$1 billion in total assets (20%) passes comfortably.

Note that this ratio covers interest-bearing debt only. Trade payables, deferred revenue, and non-interest lease obligations do not count. Read the debt notes in the annual report carefully to distinguish between interest-bearing borrowings and other current liabilities.

Ratio 2: Liquidity Ratio (30% Threshold)

Rule: Cash held in interest-bearing accounts plus conventional bonds and fixed income securities must be less than 30% of total assets.

This screens for companies whose primary asset base is cash parked in interest-bearing instruments. Holding cash itself is not the issue. The issue is how and where the cash is stored. Cash in a non-interest current account does not trigger this ratio. Cash in a fixed deposit or invested in conventional bonds does.

Example: A well-known global technology company holds US$80 billion in total assets. Of that, US$40 billion sits in US Treasury bills and corporate bonds, earning interest. The liquidity ratio is 50%. Despite being in a permissible technology business, it fails this screen.

For Singapore investors, this ratio is most relevant when evaluating large holding companies or trusts with significant cash reserves, and any company that routinely parks working capital in fixed deposits rather than current accounts.

Ratio 3: Revenue Purification Threshold (5%)

Rule: Non-halal income must be less than 5% of total revenue.

Non-halal income includes interest income on deposits and loans, revenue from any of the excluded sectors above, and any other income from prohibited sources. The 5% threshold reflects the practical reality that large diversified businesses often have incidental prohibited revenue streams that are not their primary business.

Example: A Singapore supermarket chain earns 98% of revenue from food retail and 2% from alcohol sales (a separate section of the store). The revenue from prohibited activities is 2%, which is below 5%. It passes this ratio, though investors must purify dividends proportionally.

A company earning 8% of revenue from interest on its lending book fails this screen, even if the primary business is permissible manufacturing.

When a company passes this screen but still earns a small amount of prohibited income (between 0% and 5%), investors are obligated to purify their investment returns by donating the equivalent proportion of dividends received to charity. This is covered in detail in the purification section below.

AAOIFI vs MSCI vs DJIM: What Is the Difference?

Three major Shariah screening methodologies are used globally. They agree on the business activity exclusions but differ on the financial ratios.

The MSCI methodology is used by Wahed Invest and many global Islamic ETFs. Because it uses market capitalisation as the denominator, a stock that passes at a depressed share price may fail the same screen if the share price rises significantly, even if the company's debt has not changed. This adds volatility to compliance status that the AAOIFI asset-based approach avoids.

For individual investors in Singapore doing their own research, the AAOIFI methodology is the more practical choice because the inputs (total assets, total debt) are stable balance sheet figures found in the annual report, not daily market prices.

How Singapore Stocks Measure Up

Singapore's stock market is dominated by banks, REITs, and financial services companies. This creates a significant challenge for Muslim investors building a Shariah-compliant local portfolio.

Singapore's three major banks (DBS, OCBC, UOB) fail the business activity screen outright. Conventional banking based on interest is a prohibited activity under Shariah. No ratio calculation is needed. Muslim investors cannot hold these stocks regardless of their strong dividend yields (typically 4.5% to 6%).

Most Singapore REITs are difficult to screen cleanly. Sabana Industrial REIT was the only SGX-listed REIT to hold formal Shariah certification, certified by CIMB Islamic's Shariah adviser from its 2010 listing. It lost that certification in 2021 after refinancing away from its Islamic financing structure into conventional bank loans, which pushed its debt ratio above the permissible threshold. As of 2026, no SGX-listed REIT holds active Shariah certification.

Individual REITs can still be screened manually. Industrial REITs with lower gearing ratios (below 30% of total assets) and minimal interest income are the most likely candidates to pass. Retail and office REITs tend to carry higher gearing and are more likely to breach the debt ratio.

Singapore technology and healthcare companies are generally more screener-friendly. Companies like Venture Corporation, Frencken Group, and Singapore Exchange (SGX) itself have historically passed AAOIFI debt and liquidity ratios, though the revenue purification threshold still needs checking.

The SGX Shariah Index, maintained using FTSE Shariah methodology, provides a list of SGX-listed stocks that have been independently screened. It is a useful starting point, though investors should verify the most recent financial data independently before committing capital.

How to Screen a Stock Manually in 5 Steps

You do not need a Bloomberg terminal to apply AAOIFI screening. Any Singapore company's annual report contains all the data you need.

Step 1: Business Activity Check

Read the company's primary business description on the first page of the annual report. If the main business is conventional banking, insurance, alcohol, tobacco, gambling, weapons, pork, or adult entertainment, stop. The stock is excluded regardless of the financials.

Step 2: Pull the Balance Sheet

Find the consolidated balance sheet (also called the statement of financial position). Note two figures: total assets (the grand total at the bottom) and separately, interest-bearing borrowings. These are usually broken into current (due within 12 months) and non-current (due after 12 months). Add both together.

Step 3: Calculate the Debt Ratio

Divide total interest-bearing borrowings by total assets. If the result is above 0.30 (30%), the stock fails the debt ratio screen.

Step 4: Calculate the Liquidity Ratio

Find the company's cash and cash equivalents figure. Then check the investment notes for conventional bonds, money market funds, or fixed deposits. Add those to the cash figure. Divide by total assets. If above 0.30, the stock fails the liquidity screen.

Step 5: Check the Revenue Breakdown

Open the revenue or segment notes. Look for any interest income, alcohol revenue, or other income from excluded activities. Divide that by total revenue. If above 0.05 (5%), the stock fails. If between 0% and 5%, the stock passes but dividends require purification.

Purification: What to Do When Income Is Partially Prohibited

A company that passes all three AAOIFI ratio screens but still earns some prohibited income (below the 5% threshold) requires the investor to purify their investment returns. Purification is the act of donating the proportion of your dividend income that corresponds to the company's prohibited revenue.

Purification formula:
Purification amount = (Non-halal revenue / Total revenue) x Dividend received

Worked example 1: You hold shares in a consumer goods company that earns 2% of revenue from interest on its cash deposits. You receive a dividend of S$500. Purification amount: 2% of S$500 = S$10. You donate S$10 to a charity of your choice and keep the remaining S$490.

Worked example 2: A logistics company earns 1.5% of revenue from interest income on working capital deposits. You receive S$1,200 in dividends over the year. Purification amount: 1.5% of S$1,200 = S$18. Donate S$18.

The donation does not need to go to a specific organisation. Sadaqah (voluntary charity) to any legitimate charitable cause fulfils the obligation. The amount cannot be claimed as a tax-deductible donation under Singapore law because the purpose is purification, not voluntary giving.

Capital gains are typically not subject to the same purification requirement under AAOIFI, because the gain reflects the market's assessment of the business as a whole rather than a direct share of the prohibited income. However, some Shariah scholars apply purification to capital gains proportionally. If you hold this view, the same formula applies to any realised gain.

The 90-Day Grace Period Rule

Shariah compliance is not a permanent status. A company that passes screening today may fail next quarter if it takes on additional conventional debt or its market conditions change.

When a stock in your portfolio breaches a Shariah threshold, AAOIFI and most Islamic fund managers allow a 90-day grace period to liquidate the position. During this period:

• Do not purchase additional units of the stock.
• Do not treat the holding as permissible for new investment decisions.
• Plan the exit at a time that minimises unnecessary financial loss.

Any income (dividends) earned during the non-compliant period also requires purification. If you held a stock for 30 days in a state of non-compliance before selling, purify a proportional share of any income received during that period.

This rule exists to avoid forcing investors into immediate distressed selling. A 90-day window allows orderly liquidation without punishing investors for a breach that may be temporary or inadvertent.

Tools and Platforms for Singapore Investors

Several tools make Shariah screening more accessible for Singapore-based investors.

Islamicly (islamicly.com) provides free stock screening for thousands of global equities including SGX-listed stocks. It applies AAOIFI methodology and shows each ratio so you can see exactly why a stock passes or fails. The free tier covers most individual investors' needs.

Wahed Invest is MAS-licensed in Singapore and offers ready-made Shariah-compliant portfolios screened using MSCI Islamic methodology. It is the simplest option for investors who do not want to manage individual stock selection.

MSCI ESG Manager and Ideal Ratings are institutional-grade platforms used by Islamic fund managers. They cover the broadest universe with the most current data but are priced for professional use.

The SGX Shariah Index is published on the SGX website and provides a screened list of locally listed stocks. It uses FTSE Shariah methodology and is reviewed periodically. Use it as a starting shortlist, not as a substitute for checking the most recent annual report data.

For investors building a self-directed halal portfolio, the practical workflow is: start with the SGX Shariah Index or Islamicly to generate a candidate list, then manually verify the three ratios using the most recent annual report before buying.

Frequently Asked Questions

Official sources: MAS, Capital Markets Regulation | AAOIFI, Shariah Standards

* All figures, ratios, and examples referenced in this article are for educational purposes only and are based on publicly available AAOIFI standards and company financial data. This article does not constitute a fatwa or religious ruling. Investors should consult a qualified Shariah scholar or Islamic finance adviser for guidance specific to their situation. This article does not constitute an offer, solicitation, or recommendation to buy or sell any financial product. Past performance is not indicative of future performance. Please consult a qualified adviser before making any financial decisions.