Dividend purification is the process of calculating the share of your dividend income that traces back to a company’s non-permissible activities and donating that amount to charity. The formula is simple: divide the company’s non-permissible revenue by its total revenue, then multiply that ratio by the gross dividends you received. The result is what you give away. Everything else on this page is the detail behind those two steps.
The Core Formula
The purification ratio used by the S&P Shariah Indices and the Dow Jones Islamic Market Indices is the same:1S&P Global. S&P Shariah Indices Methodology Frequently Asked Questions
Purification Ratio = Non-Permissible Revenue ÷ Total Revenue
Amount to Purify = Gross Dividends × Purification Ratio2S&P Global. S&P Shariah Indices Methodology
A quick example. Suppose a company reported $100 million in total revenue and $3 million came from interest and other prohibited sources. The purification ratio is 0.03. If you received $2,500 in gross dividends from that company during the year, you owe $75 to charity. Every dividend-paying stock in your portfolio gets its own ratio and its own calculation, and the results are added together for your total annual obligation.
The ratio stays constant for all dividends paid during the fiscal year covered by the company’s annual report. When new financials are published, you recalculate.
What Counts as Non-Permissible Revenue
Non-permissible revenue is any income a company earns from sources that violate Islamic financial principles. The S&P Shariah methodology defines this broadly: alcohol sales, gambling revenue, and any income generated from interest all count.1S&P Global. S&P Shariah Indices Methodology Frequently Asked Questions
Interest is the most common source, and it appears in companies whose main business is entirely permissible. A technology company holding billions in cash reserves earns interest. A retailer running a store credit card collects interest from cardholders. A manufacturer parking idle cash in bonds generates interest income. None of these are lending businesses, but each produces non-permissible revenue that flows through to shareholders.
The screening standards do not treat “incidental” interest from a cash balance more leniently than revenue from a dedicated non-compliant subsidiary. Interest is interest, whether from treasury management or from a financial services division.
Finding the Numbers
You need two things: the company’s annual financial filings and your own brokerage records.
On the corporate side, the key document is the Form 10-K that publicly traded companies file annually with the SEC.3U.S. Securities and Exchange Commission. How to Read a 10-K Inside the 10-K, the Consolidated Statement of Income shows total revenue, and the Notes to Financial Statements disclose what line items like “Other Income” actually contain. Interest earnings and revenue from non-core activities often live in those notes rather than on the face of the income statement. If the company operates multiple business lines, the Segment Reporting section breaks out revenue and profit by segment, which helps you isolate income from a non-compliant subsidiary that would otherwise be buried in a consolidated total.
For your personal records, use the gross dividend figures from your Form 1099-DIV, which your brokerage issues after year-end.4Internal Revenue Service. About Form 1099-DIV, Dividends and Distributions Use the gross amount, not the net that landed in your account after tax withholding. If your broker withheld $400 in taxes from a $2,500 dividend, your account shows $2,100, but you calculate purification on the full $2,500. The withheld taxes were paid from money that included a non-compliant portion.
The hardest part of the calculation is finding accurate non-permissible revenue. Some prohibited income sits inside line items labeled “Miscellaneous Income” or “Equity in Earnings of Affiliates.” Companies do not label revenue as “non-compliant” for your convenience. When the classification is genuinely unclear, rounding up is the safer choice, because understating means your remaining dividends stay tainted.
The AAOIFI Per-Share Method
Not every framework uses the revenue-ratio approach. The Accounting and Auditing Organization for Islamic Financial Institutions (AAOIFI) prescribes a different formula that works on a per-share basis: divide the company’s total prohibited income by its total outstanding shares, then multiply by the number of shares you hold. The result is your purification amount in dollars, without needing to know your dividend total.
This method can produce a different figure than the revenue-ratio approach because it anchors to share count rather than distributions. If your fund or advisor follows AAOIFI standards, use this formula instead.
When Purification Isn’t Enough
Purification only applies to companies that pass Sharia compliance screening in the first place. If a company’s non-permissible revenue exceeds a set threshold, you cannot purify the excess and keep holding the stock. You have to sell.
The major screening frameworks converge on similar limits. Both the Dow Jones Islamic Market Indices and AAOIFI cap non-permissible revenue below 5% of total revenue.5S&P Global. Dow Jones Islamic Market Indices Methodology A company earning 4% of revenue from interest can remain in a compliant portfolio after dividend purification. A company earning 6% cannot. These frameworks also apply financial-ratio screens for debt and interest-bearing securities, each typically capped around 33% of market capitalization.
Screens are recalculated periodically, and a stock that passes one review may fail the next. If you build your own portfolio rather than using a screened index, recheck every holding at least annually. Ignoring a failed screen turns the whole holding impermissible, not just the excess revenue portion.
Capital Gains and Selling
Selling shares can trigger its own obligation, and the rule depends on the company’s compliance status at the time of sale.
- If the company passed Sharia screening when you sold, most scholars hold that capital gains from price appreciation do not need purification. The dividend calculation already handles the non-permissible portion of the company’s income.
- If the company failed its screening, any capital gain from the sale must be donated entirely. You keep only your original investment cost.6Bursa Malaysia. Purification of Shariah-Compliant Equities
A stock can change status between screening periods. When a holding you own drops out of compliance, dispose of it promptly. Bursa Malaysia’s guidance advises selling within a month of learning a stock is no longer compliant.6Bursa Malaysia. Purification of Shariah-Compliant Equities
ETFs and Mutual Funds
Most retail investors hold funds rather than individual stocks, and purification works differently at that level. Sharia-compliant ETFs, such as those tracking the S&P 500 Shariah Index or the DJIM indices, are pre-screened so non-compliant companies are excluded before the fund is built. Even so, screened funds hold companies with some non-permissible income below the 5% threshold, so purification is still required.
Some Sharia-compliant funds publish a fund-level purification ratio that aggregates the ratios of the underlying holdings weighted by position size. If your fund provides this number, multiply it by your total distributions the same way you would for a single stock. If the fund does not publish a ratio, calculating it yourself means looking at every holding, which is impractical for a fund with hundreds of positions. That is a strong reason to choose funds that disclose purification data.
Conventional (non-Sharia) index funds are a harder problem. They hold non-compliant companies alongside compliant ones, and the non-compliant holdings may have non-permissible revenue well above 5%. Purifying dividends on a standard S&P 500 fund does not fix this, because the fund itself contains stocks that should not be owned. Switching to a screened fund is the cleaner resolution.
Where the Money Goes
Purified income goes to charitable causes, but the donation carries a different weight than voluntary charity (sadaqah) or obligatory alms (zakat). Because the money was never rightfully yours, scholars generally hold that purification donations do not earn spiritual reward the way voluntary giving does. The purpose is disposal.
Acceptable recipients typically include humanitarian organizations, public health programs, educational initiatives, and groups providing basic necessities to people in need. Purification funds are not restricted to the eight zakat categories specified in the Quran, so the range of eligible organizations is broader. Most scholars advise donating promptly after calculating the amount rather than letting the obligation accumulate, since holding the funds means continuing to benefit from money you should not have.
Can You Deduct It on Your Taxes
This is where religious guidance and US tax law diverge. From a scholarly perspective, purification donations are not voluntary charity; the money was never yours, so giving it away is obligation rather than generosity. On that basis, many scholars advise against claiming a tax benefit.
The IRS analysis is different. A charitable contribution under US tax law is “a donation or gift to, or for the use of, a qualified organization” that “is voluntary and is made without getting, or expecting to get, anything of equal value.”7Internal Revenue Service. Publication 526 (2025), Charitable Contributions “Voluntary” here distinguishes charitable gifts from legally compelled payments like taxes and fines. A religious obligation is not a legal compulsion. Tithes and other religiously motivated contributions are routinely deducted, and the IRS does not inquire into whether the donor felt spiritually obligated. If the recipient is a qualified 501(c)(3) organization and you itemize, the mechanical requirements under IRC §170 are met.8Office of the Law Revision Counsel. 26 U.S. Code 170 – Charitable, Etc., Contributions and Gifts
Whether to claim the deduction is a personal decision to work through with your scholar or advisor. Some investors treat the donation as a tax-neutral disposal and do not claim it. Others reason that the tax savings can be redirected to additional voluntary charity, producing more good overall. Both positions have scholarly support. What you should not do is assume the deduction is legally unavailable and skip the question without making a conscious choice.
Tools That Do the Math
Calculating ratios by hand for every stock, every year, is tedious. Several platforms automate the process for US equities. Apps like Zoya Finance, Musaffa, and HalalScreener offer paid tiers that include purification calculators alongside their compliance screening. They pull corporate financial data, calculate the non-permissible revenue ratio for each holding, and apply it to your dividend income. Paid plans typically run around $10 per month.
These tools are useful but not infallible. Platforms may apply slightly different screening criteria or draw on different data sources for non-permissible revenue. If one screener marks a stock compliant and another flags it, the disagreement usually comes down to how a borderline revenue source is classified. Check the platform’s methodology against the standard you follow (AAOIFI, DJIM, or another framework) at least once before relying on its numbers.