Dividend Purification Math: How to Calculate the $214 You Owe to Charity on a $50K Halal Portfolio

Amina, 34, single filer, software engineer in Dallas. She holds $30,000 in the SP Funds S&P 500 Sharia Industry Exclusions ETF (SPUS) inside her Roth IRA and $20,000 in the Wahed FTSE USA Shariah ETF (HLAL) in a taxable brokerage account at Schwab. Her combined dividends last year were about $850. She knows she needs to “purify” a portion of those dividends but has never actually run the numbers. She is not alone — most halal ETF investors know purification exists but cannot name the dollar amount they owe.

Why purification is required — the 5% screen is not a 0% screen

Shariah-compliant index funds use a screen: companies whose non-compliant revenue (interest income, alcohol, gambling, tobacco, conventional insurance, weapons) exceeds roughly 5% of total revenue are excluded from the index. Companies below the threshold stay in. That means every holding in SPUS or HLAL earns some non-compliant revenue — it is just below the cutoff. When those companies pay dividends, a tiny fraction of each dividend dollar traces back to that impermissible income.

Purification is the mechanism that fixes this. You calculate the tainted slice and give it away to charity. After the donation, what remains in your account is halal. The math is simple — one multiplication. The hard part is finding the right number to multiply by.

The formula: one line of math

Purification amount = Total dividends received × Fund’s impure-income ratio

That is it. The “impure-income ratio” (also called the “non-compliant income percentage” or “purification ratio”) is published by each fund’s Shariah advisory board, usually in an annual compliance report or on the fund’s website. It represents the weighted-average percentage of the fund’s underlying holdings’ revenue that came from non-Shariah-compliant sources.

The ratio changes every year because the fund’s holdings change and the underlying companies’ revenue mix shifts. You must pull the latest published ratio from the fund provider’s own disclosure before calculating. Do not reuse a prior year’s number.

Where to find the ratio for SPUS and HLAL

Important: the numbers in the worked example below use a hypothetical 2.5% impure-income ratio for illustration. Before you calculate your own purification, go to the fund provider’s website and pull the actual ratio for the most recent reporting period. Ratios in prior years for funds like these have generally fallen between 0.5% and 2.5%, but the precise figure matters — at a 0.5% ratio the same portfolio owes ~$4 per $1,000 of dividends, while at 2.5% it owes ~$25. A 5× difference.

Worked example: $50,000 portfolio, SPUS + HLAL, $214 to purify

Back to Amina. Here is her portfolio and the step-by-step purification math. We use a 2.5% impure-income ratio for both funds to illustrate the calculation. Your actual number will differ — pull the latest from each fund.

Purification = Total dividends × Impure-income ratio
Purification = $590 × 2.5% = $14.75

Wait — the title says $214, not $14.75. Here is why. When the yield is higher (some years SPUS and HLAL have distributed more), or when you include realized capital gains under the stricter scholarly view, the number climbs. Let’s run a second scenario that lands closer to that figure.

Scenario with higher dividends + capital gains purification

Suppose Amina’s $50,000 portfolio generated $850 in dividends (a slightly above-average yield year) and she also realized $7,700 in long-term capital gains by selling shares of HLAL in her taxable account. Under the stricter scholarly view (purify both dividends and gains):

Purification = (Dividends + Realized gains) × Impure-income ratio
Purification = ($850 + $7,700) × 2.5% = $8,550 × 2.5% = $213.75 ≈ $214

That is how a $50,000 halal portfolio lands at a $214 purification obligation. The dividend-only calculation is much smaller (about $21 at 2.5% on $850). The difference between $21 and $214 is entirely about whether you purify capital gains — which brings us to the most debated question in the purification space.

Dividends only vs. dividends + capital gains: the scholarly split

This is not a settled question. Here are the two positions:

If you follow the majority view (dividends only), Amina owes approximately $21 on her $850 of dividends. If you follow the stricter view (dividends + gains), she owes $214. Both are legitimate scholarly positions. The practical difference is 10×, so it is worth understanding which your fund’s Shariah advisor recommends and which your personal practice follows.

Step-by-step: calculating your own purification

1. Pull your total dividends for the year. For a taxable account, your 1099-DIV (arrives by mid-February) shows the number. For a Roth IRA or traditional IRA, your brokerage’s year-end statement shows distributions received inside the account — even though you did not withdraw them, purification applies to the dividends the fund paid into your account.
2. Pull the impure-income ratio from the fund provider’s latest report. Do this every year. The ratio changes. For SPUS: check spfunds.com. For HLAL: check wahedinvest.com. If you hold multiple funds, each fund has its own ratio — calculate separately if the ratios differ, or use the higher ratio for simplicity (a conservative approach).
3. Decide whether to purify capital gains. If you follow the majority (AAOIFI) position, skip gains. If you follow the stricter position, add your realized capital gains for the year to your dividends before multiplying.
4. Multiply: (Dividends [+ Gains if applicable]) × Impure-income ratio = Purification amount.
5. Donate the result to charity. Any legitimate cause works — see the FAQ below for details on which charities qualify.
6. Document the donation (next section).

Documenting your purification for tax and personal records

Purification donations are charitable contributions. If you itemize deductions on Schedule A (your total itemized deductions exceed the 2026 standard deduction of $15,750 single / $31,500 MFJ), they reduce your taxable income. Even if you take the standard deduction, keep records for your own tracking.

What to keep:

• Year-end brokerage statement showing total dividends received (and realized gains if you purify those).
• Screenshot or PDF of the fund provider’s published impure-income ratio for the reporting period.
• Your calculation — even a one-line note: “2026 dividends $590 × 2.5% ratio = $14.75 purification; donated $15 to [charity] on [date].”
• Donation receipt from the charity. For donations under $250, a bank statement or cancelled check is sufficient. For $250+, the IRS requires a contemporaneous written acknowledgment from the charity (IRC §170(f)(8)).

If you use a donor-advised fund (DAF) to batch multiple years of purification into one tax year, the DAF sponsor issues a single receipt for the contribution year — not the grant year. That bunching strategy can help if your combined charitable giving is close to the standard deduction threshold.

Purification inside a Roth IRA vs. a taxable account

The account type does not change the purification obligation — the dividends are impure regardless of tax wrapper. But it changes the mechanics.

• Taxable brokerage: dividends land as cash in your account. You donate the purification amount from any source (the brokerage, your checking account — it does not matter). The dividend itself is reportable income on your 1099-DIV; the donation is deductible if you itemize.
• Roth IRA: dividends are reinvested inside the Roth. You cannot withdraw a few dollars without potentially triggering the 5-year rule or early withdrawal penalty (if under 59½). Instead, donate the purification amount from a separate source — your checking account. The obligation is the same; the cash just comes from outside the Roth. This is the standard approach endorsed by US Shariah advisors for tax-advantaged accounts.
• Traditional IRA / 401(k): same as Roth — donate from outside the account. If you are 70½+ and taking RMDs, a QCD (Qualified Charitable Distribution) lets you route the purification donation directly from your IRA to the charity, satisfying both the RMD and the purification in one move. The 2026 QCD limit is $111,000 per individual (IRC §408(d)(8)).

The part most people miss: DRIP does not exempt you from purification

If you have dividend reinvestment (DRIP) turned on, your dividends automatically buy more shares instead of sitting as cash. Many investors assume “I never received the money, so there is nothing to purify.” Wrong. The fund paid you a dividend — DRIP just reinvested it on your behalf. The impure portion of that dividend still needs to be purified. Your brokerage statement shows the dividends credited even when reinvested. Use that number in the formula.

What happens if the ratio changes mid-year

Most fund providers publish the impure-income ratio annually. If your fund publishes an updated ratio mid-year (some do semi-annual reports), use the ratio that covers the period the dividends were paid. If the fund published one annual ratio, apply it to the full year’s dividends. If it published two (H1 and H2), apply each to the corresponding half-year dividends. The goal is matching the ratio to the period it measured.

A note on Zakat vs. purification — they are not the same

Zakat is the 2.5% annual wealth tax on assets held above the nisab threshold. Purification is a separate obligation tied to the impure portion of investment income. They serve different purposes, they are calculated differently, and a purification donation does not count toward your Zakat obligation (nor vice versa). If you owe both, calculate and pay each separately. Some investors route both through the same charity, which is fine — just track the amounts distinctly.

The decision lever

The number you need is the impure-income ratio from your fund provider’s latest Shariah compliance report. That single number drives the entire calculation. Pull it from the source (not from a blog, not from last year’s number, not from memory). Multiply it by your dividends (and gains, if you follow the stricter view). Donate the result. Document it. The whole process takes less time than reading this article — the only reason most halal investors skip it is that they never sat down and did the multiplication. On a $50,000 portfolio, the obligation is roughly the cost of a dinner out. The religious obligation is clear; the dollar amount is small; the math is one line. Do it once and it becomes automatic.