Purification: handling non-compliant income in a portfolio

What purification is

Screening lets you own shares in a company that is mostly acceptable but not entirely. A logistics firm with a small conventional insurance arm, a retailer with interest income on deposits, an airline serving drinks — these pass the activity and ratio tests, but they still generate some income from sources the system objects to.

Purification is what makes that permission conditional rather than free. You calculate the portion of the income you received that is attributable to those impermissible sources, and you give it away. The written standard on dealing in shares treats this disposal as a requirement, not a recommendation — it is part of the reasoning that makes holding mixed-activity shares acceptable in the first placeSource^source.

Three features of purification are worth fixing in your mind immediately, because almost every misunderstanding traces back to one of them.

**You take no credit for it.** Purification is not charity in the rewarded sense. You are handing back money that was never properly yours. The intention is disposal, not generosity. You do not claim it as sadaqah, and traditionally you do not seek reward for it.

**It is not zakat.** These are entirely separate obligations that people routinely conflate. Zakat is an obligation on wealth you legitimately own, calculated at a set rate on qualifying assets held for a lunar year. Purification is a removal of wealth that is not legitimately yours, calculated on impure income received. Doing one does not discharge the other. If you own screened shares, you may well owe both — zakat on the value of the holding, and purification on the tainted slice of the dividends.

**It does not launder a bad investment.** If a company fails the screen outright, purification is not the remedy. You do not get to hold whatever you like and pay a cleaning fee. Purification applies only within the tolerance the screen already allows.

What gets purified, and what is contested

Dividends — the settled part

There is broad agreement that dividend income requires purification. When a company pays you a dividend, that cash is a distribution of earnings, and some fraction of those earnings came from interest on deposits, from a non-compliant subsidiary, or from incidental impermissible revenue. That fraction is not yours to keep.

Capital gains — the unsettled part

Whether you must also purify the gain when you sell the shares is a genuine scholarly disagreement, and you will find serious opinion on multiple sides.

• **One view holds that no purification is due on capital gains.** The reasoning is that a share price reflects market expectations about the whole enterprise, not a distribution of specific earnings. You are selling an ownership stake to a willing buyer at a negotiated price. The gain is a trading profit on an asset, which is a permissible category.
• **A second view holds that gains should be purified in proportion to the impure income accumulated during your holding period.** The reasoning is that retained impure earnings feed into book value, which feeds into the price you receive. If you did not purify it as income because it was never distributed, you are capturing it in the exit price instead.
• **A third view, more cautious, applies purification to the whole gain where the company's impure income was material,** on the basis that it is difficult to disentangle and caution is warranted.

There is no way to present one of these as the settled answer, because it is not settled. What you can do is choose a position with reasons, apply it consistently, and be able to explain it. If the amounts are significant to you, this is a question worth putting to a qualified scholar rather than resolving from an article.

The three calculation methods

Purification produces different numbers depending on which method you use, and the difference is not trivial. All three are in use.

Method one — the per-share disclosed amount

Some index providers and fund managers publish a purification figure per share or per unit for a given period. You multiply it by the number of shares you held and you are done. Index providers publish these ratios alongside their Shariah methodologies precisely so investors can perform the calculationSource^source.

This is the easiest method and the least transparent. You are trusting the provider's underlying computation. It is a reasonable choice if you accept the provider's methodology and want a workable routine rather than a research project.

Method two — the impure income ratio

You take the company's income from impermissible sources as a proportion of its total income or net profit, and apply that percentage to the dividends you received.

Suppose a company reports total net income of 500 million, of which 12 million is interest income and 6 million is profit from a non-compliant subsidiary. Impure income is 18 million, or 3.6% of net income. If you received 2,000 in dividends, you purify 72.

This is the most widely used method for individual investors calculating for themselves. Its weakness is that "total income" is defined differently across accounting presentations, and you need to be consistent about whether you use gross income, net profit, or something else.

Method three — the revenue ratio

Same logic, different denominator. You express impure revenue as a proportion of total revenue rather than net income, and apply that percentage to your dividends.

Using different figures for the same company — suppose impure revenue of 40 million against total revenue of 2,000 million — the ratio is 2.0%, and the purification on 2,000 of dividends would be 40 rather than 72.

Revenue-based ratios usually produce smaller numbers than income-based ratios, because revenue is a bigger denominator than profit. That is not an argument for choosing it. It is a reason to pick a method for defensible reasons and then stop switching.

If you find yourself recalculating under a different method because the first answer felt high, you have stopped doing purification and started doing negotiation. Pick the method whose reasoning you accept, write down that you chose it, and apply it to everything.

A twelve-month purification ledger

Here is the exercise done properly, with three hypothetical holdings and some deliberately awkward timing. All figures are invented.

**Holding A — a logistics company.** You hold 1,000 shares all year. It pays two dividends, 1.20 per share in March and 1.30 per share in September, so 2,500 total. Its published impure income ratio for the year is 3.6%. Purification on A is 2,500 multiplied by 0.036, which is 90.

**Holding B — a technology company.** You buy 600 shares in May. It pays one dividend of 0.80 per share in August, after your purchase, so you receive 480. Its impure income is almost entirely interest on a large cash balance, at 4.2%. Purification on B is 480 multiplied by 0.042, which is 20.16.

Note what you did not do. You did not purify the March dividend on a holding you did not own in March. Purification attaches to income you actually received, not to the company's whole year.

**Holding C — a retailer.** You hold 400 shares from January and sell them in October. It pays a dividend of 2.00 per share in June, so you received 800 while you held it. Impure income ratio 1.9%. Purification on the dividend is 800 multiplied by 0.019, which is 15.20.

You also sold C at a gain of 3,000. Whether you purify part of that depends on the position you took on the capital gains question. Under the first view, nothing. Under the second, you would apply the impure income proportion accumulated over your holding period — roughly 1.9% of 3,000, which is 57 — as an approximation. Under the third and most cautious view, considerably more. Record which you chose.

**Total for the year.** Dividend purification of 90 plus 20.16 plus 15.20 gives 125.36. If you took the second view on gains, add 57, giving 182.36.

Now run the same portfolio under the revenue-ratio method and the numbers shrink, perhaps by a third or more, because the denominators are larger. Run it under a provider's published per-share figures and you get a third answer. The spread between methods on a portfolio this size is a matter of tens rather than thousands — which is worth knowing, because it tells you that precision beyond a sensible approximation is not where the effort belongs. Consistency and actually doing it matter far more than getting to the last decimal.

Funds, ETFs and managed portfolios

If you hold a compliant fund rather than direct shares, check who is doing the purification.

• **Some funds purify at the fund level** before distributing. The manager removes the impure portion and disposes of it, so the distribution you receive is already clean. In that case you do nothing further, but you should confirm it rather than assume it, and ideally see it reported.
• **Some funds publish a purification rate** and leave the disposal to you. You apply the published rate to your distributions.
• **Some do neither clearly.** If the fund documentation does not address purification at all, that is a gap worth asking about before investing.

Fund-level purification is generally cleaner and more accurate, because the manager has the underlying holdings data and you do not. It also removes the risk that you simply forget. The trade-off is that you lose visibility over where the money went, so it is reasonable to ask a manager how they dispose of it. Institutions operating under a central Shari'ah authority typically maintain a designated charity account for exactly this purpose, subject to governance oversightSource^source.

Where the money goes

The governing principle is that the money must leave you without benefiting you. That rules out more than people expect.

You should not:

• Claim a tax deduction or any financial benefit from it
• Give it to a dependent you are already obliged to support
• Direct it to an organisation from which you receive a service, membership or standing
• Use it to settle a debt you owe
• Treat it as your zakat, or as your general charitable giving

You may generally:

• Give it to general public benefit causes — medical care, poverty relief, education, infrastructure
• Give it to individuals in need who are not your dependants
• Pass it to an institution's designated charity fund if you hold through one

Opinion varies on whether purification money can go to specifically religious purposes such as mosque construction, with a common cautious view preferring general welfare uses. Ask your own reference point on that.

There is no requirement to publicise it. There is a good argument for the opposite, since the intention is disposal rather than generosity.

A filing system that makes this a ten-minute job

The reason people do not purify is not disagreement. It is that reconstructing a year of dividends in December is miserable, so it does not happen. Fix the process and the obligation takes care of itself.

1. **Keep one running record per holding.** Date, number of shares, dividend per share, amount received. Add each line when the dividend arrives, not later.
2. **Record the purification ratio when you first buy**, and update it once a year when the company reports. Note the source.
3. **Compute as you go.** Apply the ratio at the moment each dividend lands and record the purification amount on the same line. Now year-end is a sum, not an investigation.
4. **Hold the purification amounts separately.** A distinct savings pot, or simply a running total you never spend against, prevents the money quietly becoming part of your general balance.
5. **Write down your method once.** Which ratio, which denominator, what you decided about capital gains, and the date you decided it. Future you will not remember, and this is what makes consistency possible.
6. **Dispose at least annually**, and note the date and recipient category.

Six lines of record-keeping turn a dreaded task into a routine one.

Edge cases and honest limits

• **A holding fails the screen mid-year.** Most positions require purifying income received while it was non-compliant, and many require divesting within a defined window. Views on whether gain from that period must also be purified differ.
• **You received a scrip dividend or bonus shares instead of cash.** The impure portion is embedded in shares rather than cash. A common approach is to purify the cash value equivalent at the time of receipt.
• **The company reports a loss.** An income-based ratio breaks down when net income is negative. This is a case where the revenue-based method is more workable, or where a provider's published figure is more reliable than your own.
• **Rounding and immateriality.** Rounding up rather than down is the conventional approach, on the principle that erring toward disposal is safer than erring toward retention.
• **You have not purified for several years.** The general approach is to estimate as best you reasonably can and dispose of the estimate, rather than doing nothing because a precise figure is unrecoverable. An honest approximation discharged is better than a perfect calculation never made.

What purification cannot do is worth stating plainly. It does not turn an unsuitable investment into a suitable one. It does not measure whether a company treats people well. It does not reduce your market risk by a single unit. And it does not settle the questions this article has flagged as genuinely open — the capital gains treatment above all. It is a specific, bounded obligation attached to a specific permission, and the useful posture toward it is neither anxiety nor neglect but a small, consistent annual habit. If a particular case matters to you, take the actual figures to someone qualified to rule on them.