Shariah screening tolerates small amounts of impurity: under the widely applied AAOIFI thresholds, a company can earn up to 5% of revenue from non-compliant sources and still pass. That tolerance is what makes stock-market investing possible at all - almost every listed company parks cash in interest-bearing accounts. But the tolerance comes with a bill. The impure fraction of what you earn is not yours to keep. Removing it is called purification, and it is the least discussed obligation in halal investing.
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What purification is, precisely
When a screened company pays you a dividend, some sliver of that dividend traces back to impure income - interest the company earned, or a minor non-compliant business line. Purification means calculating that sliver and giving it to charity: not as sadaqah you are rewarded for, but as a disposal of money that was never cleanly yours. The giving expects nothing; scholars are careful to distinguish it from voluntary charity. It also cannot be your zakat - zakat is paid from wealth you own, and this money, in substance, is not.
One boundary question matters before the math: most purification frameworks focus on dividends actually received. Whether capital gains also require purification is genuinely debated among scholars, and practice differs between funds and screening services. If you hold non-dividend-paying growth stocks and want certainty, ask a scholar you trust; the conservative practice is to purify a portion of gains as well, but we will not pretend there is one settled answer.
The calculation
The standard method uses a purification ratio: the company's impure income as a proportion of its total income, published per company by screening services. Multiply your dividend by the ratio, and that is the amount to give away. Meezan Wealth publishes the clearest worked example in the Australian market: a holding with a 3.31% purification ratio paying a dividend across ten units generates 0.331 units' worth of income to purify. Their process runs quarterly at the licensee level across all client portfolios - which is what handled-for-you purification looks like.
Without a screening subscription, you can approximate from the annual report: take the company's interest income (and any identifiable non-compliant revenue) as a share of total revenue, and apply that percentage to your dividends for the year. It is cruder than a professional ratio but honest, and for most large screened companies the number lands well under a few percent of the dividend.
Who does it for you in Australia
| Product | Purification handling (published) |
|---|---|
| Salaam Super | Impure income identified, removed from returns, donated to charity under Dar Al Sharia oversight |
| Meezan Invest / Meezan super portfolios | Quarterly purification, methodology and worked examples published |
| Hejaz ETFs (ISLM, SKUK, HJZP, HJHI, HHIF) | AAOIFI screening and ANIC certification stated; purification reporting not detailed on the fund pages |
| Direct shares via any broker | Nobody - the obligation is entirely yours |
The table's third row deserves emphasis. Fund-level purification inside a screened vehicle is standard practice and we have no reason to believe the Hejaz funds skip it, but their public pages do not document the mechanism the way Meezan and Salaam do. If purification transparency matters to you, ask the manager for their process in writing - a fair question any certified fund should answer easily.
A worked DIY example
Say you hold shares that paid you $800 in dividends this financial year. The screening service you use lists the company's purification ratio at 2.5%. Your purification amount is $800 multiplied by 0.025: $20. Give the $20 to charity with no expectation of reward, keep a note of the calculation, and repeat next year. If you hold six stocks, run six calculations; a spreadsheet with columns for dividend, ratio and amount takes ten minutes a year to maintain. If a company publishes no usable data and no service covers it, that difficulty is itself information about whether the holding belongs in a halal portfolio.
Practical rules that keep it simple
- Purify when dividends land or once a year at a fixed date; consistency beats precision
- Give purification money to general charity; scholars commonly direct it to public-benefit causes rather than personal obligations
- Do not count it as zakat, and do not claim it as your own generosity
- Keep the record: if you switch to a managed product later, you will know your account arrived clean
- If the annual purification exceeds a few percent of dividends, re-check whether the stock still passes screening at all
Edge cases and honest disagreements
Franking credits: Australian dividends often arrive with attached tax credits, which raise the practical question of whether purification applies to the cash dividend or the grossed-up amount. The purification ratio methodology operates on the company's income composition, so the common-sense application is to the dividend you actually received; if you want the stricter reading, purify on the grossed-up figure - the difference is small and the conservative choice costs little. This is one of several micro-questions where published methodologies are silent and consistent personal practice is the answer.
Funds versus direct holdings differ in who carries the duty, not whether it exists. When Salaam or Meezan purifies at fund level, unit-holders receive returns already cleansed - your job is done for you, which is part of what the management fee buys. When you hold the same companies directly through a broker, the identical impurity arrives unpurified, and the duty transfers to you whole. Investors who run both a managed account and a DIY portfolio should be careful not to let the fund's diligence create a halo over the brokerage account next to it.
What if you simply have not purified for years? Reconstruct honestly rather than perfectly: pull your dividend statements (brokers and registries keep them), apply a reasonable estimated ratio for the years where you cannot compute one, give the total away, and start the annual habit from now. Scholars treat sincere reconstruction generously; what has no defence is continuing to skip it because the backlog feels awkward. Ten minutes a year going forward keeps you from ever rebuilding this particular spreadsheet again.
Where should the purification money actually go? The general principle - public benefit, the poor, causes that serve the community - leaves room for judgment, and the practical Australian answer is any registered charity doing genuine welfare work; some payers use the same channels they trust for other giving, keeping purification amounts in a separate line of their records so the intentions never blur. Two placements to avoid: anything that returns benefit to you (a charity auction where you take home the prize defeats the exercise), and your own zakat obligations, which purification money cannot discharge. If you want a single low-friction destination, the tainted-wealth channels that exist for interest disposal accept impure income on the same removal principle - the mechanics are in the interest disposal guide, and the discipline is identical: money out, nothing back, recorded and done.
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The habit compounds in an unexpected way: investors who purify annually end up knowing their portfolios better than investors who do not, because the calculation forces an annual look at what each company actually earns from. More than one holder has discovered a screening failure through the purification spreadsheet before their screening service flagged it. Diligence in one duty quietly audits the other.
Purification is the honesty tax of halal equity investing: small, regular and non-negotiable once you understand why the tolerance thresholds exist. Screening lets you in the market; purification keeps your gains clean while you are there. For the screening mechanics, see how AAOIFI screening works; for zakat on the same portfolio, see zakat on shares. Provider practices verified August 5, 2026.