Shariah screening has a dirty little secret that the industry handles quietly: passing the screens does not make a company's income pure. A compliant retailer still parks cash in interest-bearing bank accounts; a permitted miner still earns treasury income. The ratio screens cap this contamination, they do not eliminate it, and a small fraction of every dividend you receive traces back to it. Purification is what serious Islamic investing does about that fraction, and it is one of the sharpest quality tests you can apply to a South African halal product.
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The principle
Purification means identifying the non-permissible slice of investment income, typically the portion attributable to interest and other prohibited earnings inside portfolio companies, and giving it away to charity, with no expectation of reward or tax benefit motive. The investor keeps only the clean remainder. For a fund, this is an accounting process run at portfolio level; for a DIY share investor, it is a personal discipline. Either way, the test of seriousness is disclosure: who calculates it, how much it was, and where it went.
Who does it well in South Africa
- Old Mutual Albaraka sets the standard: incidental non-permissible income is paid to a charitable trust elected by the Shariah board, excluded from investor income, and the purification amounts are disclosed alongside every distribution. You can see, per payout, what was stripped.
- Oasis Crescent reports performance gross of non-permissible income, strips NPI out and donates it, and publishes the figures; the underlying global equity fund disclosed 0.09% NPI for the twelve months to January 2026. Signed annual certificates cover the process.
- Camissa, 27four, Element and Sentio all operate board-approved purification within AAOIFI-standard mandates. Element publishes per-fund certificates; Camissa and 27four do not itemise purification amounts on public fact sheets, so strict investors should request the detail directly.
- The Satrix Shari'ah Top 40 ETF does no purification at all: the issuer distributes index constituent dividends without adjustment and publishes no NPI figures. That is not a hidden flaw, it is the passive model, but it moves the job onto you.
DIY purification for ETF and share investors
If you hold STXSHA or individual shares, a workable process looks like this. For each holding, estimate the non-permissible share of company income, the common proxy is interest income as a fraction of total revenue or income, using the annual report or a screening service's published ratio. Apply that fraction to the dividends you received from that holding during the year. Sum across holdings and donate the total to charity, separately from your zakat. Precision matters less than consistency: scholars differ on exact methods, and any honest, consistently applied estimate beats the alternative most investors choose, which is ignoring it entirely. Keep a simple spreadsheet; fifteen minutes at tax season covers a typical portfolio. Our halal shares guide covers the rest of the DIY discipline.
Common confusions, cleared up
- Purification is not zakat. Zakat is an obligation on your wealth; purification removes tainted income that was never cleanly yours. They are calculated separately and both apply.
- Tax-free does not mean purified: ETF distributions inside a TFSA still carry the same NPI fraction.
- Purification is not a fund fee; funds that purify are not more expensive because of it, and the amounts involved are typically small fractions of a percent.
- A fund reporting returns 'gross of non-permissible income' is being honest, not sneaky: it means the published return includes what was then stripped and donated, so your received return is slightly lower and fully clean.
Why this belongs in your fund selection
Purification disclosure is a cheap, revealing proxy for overall governance seriousness. A manager that quantifies and publishes NPI per distribution has working machinery connecting its scholar board to its accounting; a manager that never mentions purification is asking for trust it has not documented. It is one of the inputs to the transparency scores on our Halal Money Index, and one more reason the assurance leaders rate where they do. Compare the funds themselves on the investing page.
Quick answers
Is purification the same as zakat?
No. Zakat is an obligation calculated on your wealth; purification removes tainted income that was never cleanly yours, and it is donated without expectation of reward. They are calculated separately and both apply to an investment portfolio. Budget for them as two different disciplines.
How much does purification typically amount to?
Small fractions of a percent for screened portfolios: the ratio screens cap contamination before purification removes it. Oasis disclosed 0.09% non-permissible income on its global equity fund for the twelve months to January 2026, a representative order of magnitude. The amounts are small; the discipline is the point.
Compare providers in your state
See side-by-side comparisons of Shariah-compliant products, or let our matcher recommend the best options for your situation.
Do I need to purify fund distributions?
Not for funds that purify at portfolio level, which includes the certified SA managers; your received distributions are already clean where the manager strips and donates NPI. You do need to purify ETF distributions (STXSHA does no purification) and dividends from directly held shares, using a consistent estimate-and-donate method.