Dividend Purification Explained: Calculating What to Donate on a £500 Halal Dividend

A dividend purification calculation cleanses the small slice of a company's income that came from non-compliant sources (mostly interest) by donating that proportion to charity. The core formula is simple: (non-compliant income % of revenue) × dividend received. On a £500 dividend from a company with a 5% non-compliant ratio, you would purify £25 — give it away, claim no benefit, and keep it entirely separate from your Zakat.

Why purification exists

Almost no large listed company is 100% pure. A retailer holds cash in an interest-bearing account; an industrial firm earns a sliver of revenue from a non-compliant subsidiary. The Shariah screening methodologies most UK halal investors follow — including the standards set by AAOIFI (the Accounting and Auditing Organisation for Islamic Financial Institutions) and the index rules used by providers like S&P Dow Jones — allow you to own such a company only if its non-compliant income stays below a small tolerance (commonly 5% of revenue).

But "tolerated" is not the same as "clean." That small slice of impure income still flows into your dividend. Purification (tatheer) is the act of cleansing it: you calculate the impure proportion of what you received and give exactly that amount away to charity, expecting no reward and no tax relief in return. The rest of the dividend is yours to keep, halal and clear. The majority view, including AAOIFI, treats purification as obligatory (wajib) for any holding with non-compliant income.

The purification formula, worked on £500

The most widely used method — the "income" or "revenue ratio" method — is a single multiplication:

Purification due = Non-compliant income ratio × Dividend received

The ratio comes from the company's accounts: impure income (interest received + revenue from non-compliant lines) ÷ total revenue. You do not need to recalculate this yourself if you use a screener — see the next section.

Finding the purification ratio: two routes

You will see two different sources for the number you multiply by. They are not interchangeable, so know which one you are using.

Route 1 — company-published / revenue-ratio figures

Some Shariah-screened funds and a handful of companies publish the percentage of revenue that was non-compliant for the year. Islamic equity funds typically disclose a per-share purification amount in their annual or semi-annual reports — for example the Amana Income Fund (ticker AMANX) and other Saturna funds publish a purification figure in pence/cents per share that fund holders are expected to give away. If you hold a fund, use its published per-share number rather than guessing a ratio.

Route 2 — screener per-share or per-ratio figures

For individual stocks, screeners do the work for you. Apps like Zoya and Musaffa publish either the non-compliant income ratio or a ready-made purification amount. Per Zoya's own guidance, the AAOIFI per-share method is: take the company's non-compliant income for the year, divide it by the total shares outstanding to get an impure amount per share, then multiply by the number of shares you hold.

The two methods usually land close together for dividend-paying stocks. The per-share AAOIFI method is stricter because it applies whether or not a dividend was paid — it cleanses your share of the company's impure earnings regardless.

The capital-gains purification debate

A live scholarly disagreement: when you sell a share at a profit, must the capital gain also be purified, or only the dividends?

• View A — dividends only. Held by S&P Dow Jones index methodology and many practitioners: purification applies to income distributions (dividends), not to capital gains, because the gain reflects market price movement rather than a distribution of impure earnings.
• View B — purify earnings regardless. The stricter AAOIFI-aligned position cleanses your proportional share of the company's non-compliant income on an annual basis whether or not it was distributed, which in practice captures retained impure earnings that feed into the share price.

What UK funds tend to follow: most UK-available Shariah equity funds publish a dividend / income-based purification figure per share (the View A / S&P-style approach) and do not separately purify investor capital gains — they leave gains-purification to the individual investor's chosen scholarly position. If you follow a stricter AAOIFI line and want to purify gains too, the practical approach is to apply the non-compliant ratio to your realised gain and donate that slice. When in doubt, follow the methodology your fund or your scholar specifies and apply it consistently.

How to donate the purified amount in the UK

Choose an eligible charity

Purified money should go to a genuine charitable cause that benefits people in need — many scholars discourage directing it to mosque construction or anything from which you personally benefit. A UK registered charity (verifiable on the Charity Commission register) is a clean, accountable choice. General relief, food, water, healthcare and education funds are common destinations.

Do NOT claim Gift Aid on purified money

This is the most-missed UK detail. Gift Aid lets a charity reclaim an extra 25p for every £1 you donate, on the basis that it is your money on which you have paid tax. Purified income is being given precisely because it is not rightfully yours to benefit from — so ticking the Gift Aid box, which generates a tax-relief benefit tied to you, runs against the purpose of cleansing. Many scholars advise giving purified amounts without Gift Aid. Use Gift Aid freely on your ordinary, halal charitable giving and Zakat-eligible donations where permitted — just not on the purification slice.

Keep it separate from Zakat

Purification and Zakat are two different obligations and must not be conflated:

The purified £24 does not reduce, and is not part of, your Zakat. You pay Zakat separately on the value of your halal holdings as normal.

Record-keeping for an ISA

Dividends inside a Stocks & Shares ISA are free of UK dividend tax (and you can pay in up to £20,000 across ISAs in 2026/27) — but the ISA wrapper changes nothing about your Shariah purification duty. HMRC won't ask for purification records, and your ISA provider won't track them, so keep your own simple log:

• Date the dividend was received and the amount.
• Holding (company or fund) and the non-compliant ratio / per-share figure you used, plus its source (screener name and date, or fund report).
• Purification due and the date donated + charity name.

A single spreadsheet row per dividend is enough. It lets you reconcile annually, prove to yourself you have cleansed everything, and avoid double-counting across the tax year.

Frequently asked questions