Financial ratio screening: debt, cash and interest-income limits
Calculate the debt, cash, receivables and interest-income ratios used by major Sharia standards and see why different denominators change the result.
What you will learn
- The three main financial ratios used in Sharia stock screening and why they exist.
- How AAOIFI, MSCI and S&P Dow Jones Indices differ in thresholds and denominators.
- How to calculate each ratio from a balance sheet and income statement.
- Why a falling share price can turn a compliant company into a non-compliant one.
Explanation
A company that passes the activity screen (lesson 2) can still be heavily involved with riba through its balance sheet: it may borrow at interest or hold large interest-bearing deposits. Because almost every listed company does this to some degree, scholars allow investment if the involvement stays below set limits. These financial ratio screens (quantitative screens) have three typical parts.
1. Debt ratio
Debt ratio = interest-bearing debt ÷ denominator
Interest-bearing debt includes bank loans, conventional bonds and similar borrowings. Its purpose is to limit how much of the company is financed with riba.
2. Cash and interest-bearing securities ratio
Cash ratio = (cash + interest-bearing deposits and securities) ÷ denominator
This limits how much of the company's value consists of interest-earning money. Some standards look at cash plus interest-bearing securities, others only at the interest-bearing part.
3. Receivables (liquidity) ratio
Receivables ratio = (accounts receivable + cash) ÷ denominator
Accounts receivable are amounts customers owe the company. The reasoning: a share mainly represents real assets. If most of a company consists of money and debts owed to it, buying the share comes close to trading money for money, which is subject to strict rules.
4. Interest-income ratio
Interest income is normally added to prohibited revenue in the 5% revenue test from lesson 2: (interest income + other prohibited revenue) ÷ total revenue.
Thresholds and denominators
| Standard | Debt | Cash / interest-bearing | Receivables + cash | Denominator |
|---|---|---|---|---|
| AAOIFI Sharia Standard No. 21 | below 30% | below 30% | not a fixed ratio in the same form | market capitalisation |
| MSCI Islamic Index Series | 33.33% | 33.33% | 33.33% | total assets |
| Dow Jones Islamic Market (from September 2026) | below 30% | below 30% | see methodology | trailing 24-month average market capitalisation |
Market capitalisation (market cap) is share price × number of shares. Total assets is the balance-sheet total. The MSCI methodology (October 2024 version) also uses lower 30% thresholds for companies that are not yet in the index, which reduces constant in-and-out switching. S&P Dow Jones Indices announced in August 2026 that the Dow Jones Islamic Market indices would move from a single 33% leverage screen to several screens below 30%, effective with the September 2026 rebalance. Methodologies change, so always read the current document of the standard you rely on.
Why the denominator matters
- Total assets is stable and based on accounting values, but it is updated only when new reports appear.
- Market cap reflects current value, but it moves with the share price. If the price falls, the same debt becomes a larger percentage. Averaging over 24 or 36 months smooths this effect.
Worked example
Hypothetical example: An industrial company reports (all in euro millions): total assets €500m; interest-bearing debt €140m; cash and interest-bearing deposits €90m; accounts receivable €80m; total revenue €300m; interest income €4m; other prohibited revenue €8m. Its 24-month average market cap is €400m.
| Test | Market-cap basis, 30% limit | Total-assets basis, 33.33% limit |
|---|---|---|
| Debt | €140m ÷ €400m = 35.0% → fail | €140m ÷ €500m = 28.0% → pass |
| Cash | €90m ÷ €400m = 22.5% → pass | €90m ÷ €500m = 18.0% → pass |
| Receivables + cash | not tested in this form | (€80m + €90m) ÷ €500m = 34.0% → fail |
| Prohibited + interest income | (€4m + €8m) ÷ €300m = 4.0% → pass under a 5% limit |
The company fails under both methods, but for different reasons. Now suppose the average market cap falls 25% to €300m: the market-cap debt ratio rises to €140m ÷ €300m ≈ 46.7%, although the company has not borrowed a single extra euro.
Common mistake
Practice activity
A hypothetical software company has: total assets €1,200m; interest-bearing debt €150m; cash and interest-bearing deposits €420m; receivables €100m; 24-month average market cap €2,000m. Calculate the debt and cash ratios on both bases and the receivables-plus-cash ratio on the total-assets basis. Which tests fail?
Show solution
- Market cap, 30% limit: debt €150m ÷ €2,000m = 7.5% (pass); cash €420m ÷ €2,000m = 21.0% (pass).
- Total assets, 33.33% limit: debt €150m ÷ €1,200m = 12.5% (pass); cash €420m ÷ €1,200m = 35.0% (fail); receivables + cash (€100m + €420m) ÷ €1,200m ≈ 43.3% (fail).
The cash-rich company passes on a market-cap basis but fails on a total-assets basis. High market value relative to book value often favours technology firms under market-cap methods.
Limitations: real screens define "debt" and "cash" in detail (for example lease liabilities or Islamic deposits), which can change the figures.
Key takeaways
- Financial screens limit debt, interest-bearing cash and, in some standards, receivables.
- Thresholds are around 30–33% and the denominator is either market cap or total assets.
- The same company can pass one standard and fail another.
- Compliance status must be rechecked regularly because the inputs change.
Next step
Next you look at the financing side: how Islamic banks provide finance through murabaha, ijara and musharaka instead of interest-bearing loans.
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