Halal investing: the complete guide
Investing in line with Islamic principles is not just about avoiding a short list of "sin stocks". It is a two-layer discipline - screening the business and its balance sheet - followed by purification of any incidental impermissible income, and a distinct set of instruments (sukuk, murabaha) built to earn a return without riba. This guide explains each step the way a Shariah board would, and points you to the tools that do the maths.
Layer one: the business activity screen
A company fails immediately if its core business is impermissible, no matter how healthy its accounts. The standard exclusions are conventional (interest-based) banking, insurance, alcohol, tobacco, gambling, adult entertainment, weapons and pork. A pure-play in any of these is non-compliant, full stop.
The grey area is mixed-revenue companies: a supermarket that also sells alcohol, or a hotel group with bar income. Boards typically tolerate a small share of incidental non-compliant revenue and then require it to be purified (see below). This is why a name can be "compliant" and still generate a purification obligation.
Layer two: the AAOIFI financial ratios
Even a permissible business can fail on its balance sheet if it is drowning in interest-bearing debt or interest income. The AAOIFI-style screen applies three ratios (the common retail thresholds; some boards use 30% instead of 33%):
| Ratio | Limit | Why it exists |
|---|---|---|
| Debt to market cap | < 33% | Caps exposure to interest-bearing borrowing (riba). |
| Interest-bearing cash & securities | < 33% | Limits reliance on interest income and liquid assets. |
| Non-compliant (impermissible) income | < 5% | A tiny amount of incidental haram income is tolerated, then purified. |
These ratios move with a company's balance sheet and share price, so a stock can drift in and out of compliance over time - which is exactly why a one-off check is not enough. Our Halal Stock Screener runs both layers on any ticker, and the Halal Portfolio Checker weights every holding to give your whole portfolio a compliant percentage.
Purification (tatheer): cleansing the small stuff
If a compliant company earns a little interest income, the corresponding slice of your dividend is not yours to keep - it must be given to charity, without the intention of reward (since it was not earned purely). This is purification, or tatheer.
The mechanics are precise: multiply the dividend you received by the company's non-compliant-income ratio. If that ratio is not published, boards use a conservative default (around 5%). For a business that is itself non-compliant, the whole dividend is purified - and you would usually plan to exit the position. Note that capital gains are generally not purified; only income is. Our purification calculator computes the exact amount from your dividends.
Sukuk: an "Islamic bond" that is not a loan
A conventional bond is a loan that charges interest - prohibited. A sukuk achieves a similar cash-flow profile through a different structure: it represents ownership in a real underlying asset or project and pays you periodic profit distributions generated by that asset, with the face value redeemed at maturity. You own a share of the asset, not a debt.
For investors the practical questions are the same as for any fixed-income instrument - what is the yield to maturity, is it trading at a discount or premium - which our sukuk yield calculator answers. Sovereign and blue-chip corporate sukuk (the UAE retail market has boomed since 2024) are generally lower risk, but always confirm a specific sukuk's structure with its Shariah board.
Murabaha: financing without interest
When you need to finance a home or car the Islamic route is often murabaha - a cost-plus sale. Instead of lending you money at interest, the bank buys the asset and sells it to you at cost plus an agreed, fixed profit, repaid in instalments. The total price is fixed upfront and does not compound with time or penalties, which is the core distinction from a conventional loan.
Because the profit is fixed rather than accruing, early settlement does not "save interest" the way it does on a loan (though many banks grant a discretionary rebate, ibra). Our murabaha calculator models both the reducing-balance and flat-profit methods banks use.
Zakat on your investments
Zakat is the annual 2.5% due on your zakatable wealth once it exceeds the nisab (the value of 85g of gold). For investors that includes cash, the market value of shares and funds held for trading, sukuk and gold. Long-term equity holdings are treated differently by different scholars - some zakat the full value, others only the zakatable assets within the company - so this is an area to confirm with your reference.
Crucially, zakat is owed regardless of any tax wrapper: an ISA or pension changes your obligation to the taxman, never to zakat. Calculate yours with the zakat calculator.
Check your portfolio
This guide is general educational information, not religious or financial advice. Scholarly opinions and Shariah-board methodologies differ (for example on long-term equities and cryptocurrencies). Always confirm with your scholar or board before acting.
Frequently asked
Is Bitcoin halal?
Scholars differ. Many treat Bitcoin and Ethereum as permissible or "questionable" - they are not interest-bearing and represent a transferable asset, but concerns about speculation and lack of intrinsic backing remain. Interest-bearing stablecoins and lending/staking-for-yield tokens are widely considered non-compliant because the return resembles riba. Follow your own scholar or board.
Are ETFs and index funds halal?
A broad index fund (S&P 500, MSCI World) almost always holds non-compliant names - conventional banks, insurers, alcohol - so it is usually classed as questionable or non-compliant. Dedicated Shariah ETFs (e.g. SPUS, HLAL, ISWD) are screened and purified for you, which is why they are the simplest halal core for most investors.
How much of my dividends do I purify?
You purify the impermissible portion. If a company is compliant but earns a little interest income, you give away that income share of your dividend (its non-compliant-income ratio, or a conservative 5% if the data is unavailable). If the business itself is non-compliant, the entire dividend is purified. Capital gains from selling the share are generally not purified - only income is.
Is gold a good halal asset?
Yes, physical gold (and fully-backed gold) is a classic halal store of value and features in many Islamic portfolios. Just note the rules of sarf: gold must be exchanged hand-to-hand (spot), which is why leveraged or deferred gold products can raise compliance questions. Gold is also zakatable above the nisab.
Do I still owe zakat on investments held in a tax wrapper?
Yes. A tax wrapper like an ISA or a pension only changes your obligation to the state, not your religious obligation. Zakat is due annually at 2.5% on your zakatable assets above the nisab - including shares, sukuk, cash and gold - wherever they are held. The tax-free status of the wrapper is irrelevant to zakat.