Contested question 9 of 10
Purification: is it required, how is it calculated, and does it make an investment halal?
Purification means giving away the share of your return that came from impermissible sources (typically interest income). Scholars who accept threshold screening generally require it; it does not retroactively make a prohibited investment permissible, and it is not zakat. The most common method applies the company's impermissible-income ratio to the dividends you received; a stricter method applies it to capital gains as well.
Purification: is it required, how is it calculated, and does it make an investment halal?
Purification means giving away the share of your return that came from impermissible sources (typically interest income). Scholars who accept threshold screening generally require it; it does not retroactively make a prohibited investment permissible, and it is not zakat. The most common method applies the company's impermissible-income ratio to the dividends you received; a stricter method applies it to capital gains as well.
- Required on dividends; optional on gains (AAOIFI)
- Required on dividends and gains (Stricter boards and some screeners)
- Purification does not cure the underlying problem (Critics of threshold screening)
- The facts of the specific contract decide which position applies; verify before you sign
Source: HalalWallet (halalwallet.us)
The criticism, at full strength
Purification looks like paying a small fee to launder an investment that would otherwise be haram.
What is true in it
- Purification only applies to investments that already pass the screen; it is not a cure for failing ones.
- Few brokerages calculate it for you; many investors never do it.
- Methods differ, and the amounts are usually small (a fraction of one percent of dividends).
The documented positions
1Required on dividends; optional on gains
Held by
AAOIFI; most fund boards
Reasoning
Interest income reaches the shareholder through dividends; the proportionate share must be given to charity without seeking reward. Capital gains reflect market pricing, not the interest itself, so purification is not required on them.
2Required on dividends and gains
Held by
Stricter boards and some screeners
Reasoning
The share price embeds the interest income, so the tainted portion of gains should also be purified.
3Purification does not cure the underlying problem
Held by
Critics of threshold screening; scholars who avoid interest-exposed equities
Reasoning
If a portion of a company's business is impermissible, owning a share of it is participating in that business; giving away the proportionate income does not change what you own. On this view purification is a mitigation, and the better course is to avoid the exposure where possible.
Where the difference shows up: $1,200 of dividends from a fund with a 1.5% impure-income ratio
You hold a halal ETF that paid you $1,200 in dividends this year and publishes a purification ratio of 1.5% (meaning 1.5% of the underlying companies' income came from interest or other impermissible sources). Dividends-only method (AAOIFI, most fund boards): give $18 to charity. Dividends-and-gains method (stricter boards): if you also realized $5,000 of gains, add 1.5% of that ($75) for $93 total. Either way the amount is small, which is the critics' point ('a fee to launder') and the defenders' point ('the impermissible component really is tiny'). What purification cannot do is fix an investment that fails the screen: if the company or fund fails the debt or income tests, purification does not make it permissible; it must be sold. And purification is not zakat: it is giving away money that was never yours to keep, with no reward intended, whereas zakat is a separate obligation on wealth you do own.
| Point of difference | Conventional | Compliant structure |
|---|---|---|
| Dividends-only (AAOIFI) | $1,200 x 1.5% = $18 | |
| Dividends + gains (stricter) | ($1,200 + $5,000) x 1.5% = $93 | |
| Counts toward zakat? | No; separate obligation |
What to verify before you decide
- Ask whether your fund or robo-advisor calculates and reports purification.
- If you hold individual stocks, use a screener that publishes the purification ratio and keep records.
- Give purified amounts to general charity, not as zakat, and without intending reward.
Bring the answers, and the contract, to your scholar. If a provider will not answer these in writing, that is itself an answer.
Go deeper on HalalWallet
Primary sources
- AAOIFI Shari'ah Standard No. 21: Financial Paper (Shares and Bonds), purification provisions
- Wahed Invest and SP Funds published purification ratios (fund documents)
- AAOIFI Shari'ah Standard No. 21
Standards bodies, fiqh councils, named scholars, index methodologies, and academic works only. No forums, no aggregators.
Questions people ask about this
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Reviewed by: HalalWallet Editorial Team
Last reviewed: 2026-10-01
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