Any halal stock list, screening app, or index you have seen is the output of a two-stage filter: a business screen and a financial ratio screen. Understanding how those two stages actually work is more useful than memorizing any single list, because the list changes as companies and their financials change, while the method behind it stays fairly stable.
The two-stage screening process
Every mainstream Shariah screening methodology, whether it is used by an index provider, a screening app, or an individual scholar's board, runs a company through two separate filters in sequence. First, a business screen asks what the company actually does for a living. Second, a financial ratio screen asks how the company is financed and where its income comes from, even if its core business passed the first test.
A company has to clear both stages to be considered compliant under a given methodology. Failing either one is enough to disqualify it, regardless of how it performs on the other.
Business screens: what a company actually does
The business screen looks at a company's core revenue-generating activity. If that core activity falls into a prohibited category, the company fails the screen outright, no matter how its balance sheet looks. Commonly excluded categories include:
- Conventional banking, insurance, and other interest-based financial services
- Alcohol production or sale
- Gambling and gaming operations
- Pork production or processing
- Adult entertainment
- Weapons manufacturing, under some screening methodologies, though interpretations vary here more than in the categories above
Most large, diversified companies do not fail this screen outright, since most public companies are not primarily in one of these businesses. Where it gets more complicated is incidental revenue: a retailer that sells a small amount of alcohol alongside groceries, for instance. Different methodologies set different tolerance levels for how much incidental, non-core revenue from a prohibited activity is acceptable before a company fails the business screen anyway.
Financial ratio screens: how much debt and interest income is too much
A company can pass the business screen and still fail the financial screen, because the ratio screen is not about what the company sells, it is about how the company is financed and how it earns income on its own cash. The two ratios that come up most often are:
- Debt-to-market-cap (or debt-to-total-assets): how much of the company's capital structure is made up of conventional, interest-bearing debt relative to its size.
- Interest-bearing assets and cash to total assets: how much of the company's own holdings sit in conventional interest-bearing instruments, like interest-bearing deposits or bonds, rather than in the business itself.
A company that is heavily leveraged with conventional debt, or that parks a large share of its cash in interest-bearing instruments, can fail the financial screen even if its core business (say, manufacturing or retail) would otherwise be perfectly acceptable.
A number, but not a universal one
Screening methodologies commonly use thresholds somewhere in the 30 to 33 percent range for these debt and interest-bearing-asset ratios, a range associated with widely referenced approaches including those used by major Islamic index providers. That range is a useful orientation point, not a fixed universal rule. AAOIFI's standards and individual screening services, including apps like Zoya and Musaffa, can and do differ on the exact cutoff they apply and on exactly how the ratio is calculated.
Why a stock can pass one service's screen and fail another's
Because the exact thresholds and calculation methods differ between screening providers, it is entirely possible for the same stock to be labeled compliant by one service and non-compliant by another, especially for companies that sit close to a threshold. This is not a sign that one service is wrong and the other is right. It reflects genuine differences in scholarly opinion and methodology design that exist across the Islamic finance industry, not a flaw in the concept of screening itself.
If a specific stock matters to you, the more useful habit is checking which methodology a screening result is based on and understanding roughly why it passed or failed, rather than treating any single label as the final word.
What screening does not tell you
A Shariah compliance screen answers one question: does this company's business and balance sheet structure meet a given set of religious criteria. It does not tell you whether the stock is a good investment, whether it is fairly valued, or what it is likely to do in the future. Compliance and investment quality are separate questions, and a stock can be fully compliant and still be a poor investment choice, or vice versa for the small set of borderline cases. Screening results also change over time as a company's financials shift, so a stock that passes today is not guaranteed to pass at the next review.
Frequently asked questions
Is there one official halal stock screening standard everyone uses?
No single standard is universally applied. AAOIFI publishes widely referenced standards, and major index providers and screening apps each apply their own methodology, which can differ in specific thresholds and calculations even when they are all trying to answer the same underlying question.
Does passing a Shariah screen mean a stock is a good investment?
No. Screening addresses religious compliance, not investment quality, valuation, or future performance. Those are separate judgments you need to make on their own terms.
Can a company's screening status change?
Yes. Screening results are typically reviewed periodically as a company's revenue mix and balance sheet change, so a stock's compliance status is not guaranteed to stay the same indefinitely.
Educational information, not advice
This page explains how Shariah stock screening methodologies generally work. It is not a compliance ruling on any specific stock, and it is not financial or religious advice. Exact thresholds vary by provider and by scholar, so confirm the current methodology and any specific stock's status directly with the screening service you use, and consult a qualified Islamic scholar for questions about religious compliance.