The short answer
Capital One stock (COF) is HARAM in ZakatInvest's qualitative classification. Capital One's core business is conventional credit-card and consumer lending funded by interest-bearing deposits and debt. The current filing also provides quantitative evidence: net interest income alone was 79.74% of quarterly total revenue, while interest-bearing funding was 75.12% of assets.
This is a reproducible research screen, not a fatwa or investment recommendation. Apply your school's principles and consult a qualified scholar for a binding ruling.
Current quantitative Sharia screen
Based on 10-Q figures for the period ended 2026-03-31; calculated 2026-07-13.
513,005 / 682,905
168,808 / 682,905
432,139 / 682,905
12,145 / 15,231
- Financial
- Fails
- Overall
- Fails
Interest-bearing funding is 75.12% of assets, identifiable liquidity is 24.72%, receivables plus cash are 63.28%, and net interest income is 79.74% of total revenue. The conventional-banking business activity also fails.
- Financial
- Fails
- Overall
- Fails
Interest-bearing funding and receivables plus cash exceed the examined total-assets limits; identified liquidity is also elevated. Conventional banking independently fails the business-activity screen. This is a calculation against the named method, not an index-membership claim.
- Financial
- Fails
- Overall
- Fails
Interest-bearing funding is 75.12% of assets and identifiable liquidity is 24.72%; net interest income is 79.74% of total revenue. This is a calculation against SAC ratios, not an official classification of a U.S.-listed security.
- Financial
- Not calculated
- Overall
- Fails
Historical market-cap ratios are not calculated, but a different denominator cannot cure the independently failed conventional-banking business-activity screen.
Business-activity disclosure
Capital One is a conventional financial-services company whose principal activities include credit cards, consumer lending, interest-bearing deposits, auto lending, commercial banking and the acquired Discover operations. Net interest income alone was 79.74% of current quarterly total revenue, far above the examined 5% activity benchmark.
Limitation: The filing separately reports interest, interchange, service charges, other non-interest income, credit losses and other financial categories but does not label each product or contract as Sharia-compliant or non-compliant. That limitation does not make the result uncertain because directly disclosed net interest income alone establishes the core business-activity failure.
Purification
Purification is not calculated because Capital One fails at the issuer's core business-activity level. The 79.74% net-interest figure is a documented minimum used to establish failure, not a percentage that can be donated to make continued ownership compliant. Investors should follow qualified guidance for disposing of income from an impermissible holding.
Inputs, assumptions and primary sources
- Inputs use Capital One's March 31, 2026 Form 10-Q; amounts are USD millions as presented in the filing.
- Interest-bearing funding includes $461,117 million of interest-bearing deposits, $11,283 million of secured debt, $626 million of federal funds purchased and securities sold under agreements to repurchase, $38,421 million of unsecured debt and $1,558 million of other borrowings.
- Cash uses $4,555 million of cash and due from banks. Interest-bearing securities use $71,939 million of interest-bearing deposits in banks plus $90,620 million of available-for-sale debt securities and $1,694 million of held-to-maturity debt securities.
- Receivables use $424,124 million of notes receivable net plus $3,460 million of interest receivable. Loans held for sale are not added to the broad receivables input.
- Net interest income of $12,145 million is used as a directly comparable minimum non-compliant business-revenue numerator against $15,231 million of total revenues. Gross interest and dividend income is higher, but comparing gross income with revenue net of interest expense would mix accounting bases.
- The minimum excludes additional conventional lending fees, interchange, service charges, trading and other financial activities; it is sufficient to establish failure without pretending to be a complete prohibited-revenue percentage.
This is a reproducible financial screen, not a fatwa. A failed total-assets screen can coexist with a pass under a market-cap methodology. ZakatInvest keeps the qualitative assessment separate so numerical thresholds do not erase material context.
Current quantitative evidence
The calculations use Capital One's official filing at the SEC (Q1 2026 Form 10-Q). Amounts are USD millions and use total assets as the denominator.
- Interest-bearing funding / assets: 75.12%, including interest-bearing deposits and borrowings.
- Identifiable interest-bearing liquidity / assets: 24.72%, using interest-bearing bank deposits and disclosed debt securities alongside cash.
- Receivables plus cash / assets: 63.28%, using net financing receivables, interest receivable and cash.
- Net interest income / total revenue: 79.74% ($12,145 million of $15,231 million).
All examined asset-based methodologies fail financially, and the business-activity failure is independent of any denominator choice. Purification is not calculated because donating a percentage cannot make a core riba-based lender permissible.
What Capital One does
Capital One is a conventional financial-services company operating credit cards, consumer banking, auto lending, commercial banking and related payments and financial products. At March 31, 2026, it reported $682,905 million of assets, $461,117 million of interest-bearing deposits and $513,005 million of interest-bearing funding when deposits and borrowings are considered together.
The company completed its Discover acquisition before this filing. Discover's payment-network and card operations do not change the dominant conventional lending and deposit model; the combined issuer still earns substantial interest from revolving balances and loans.
Why the business screen fails
1. Conventional lending and deposits are core activities
Capital One earns interest from credit-card balances, auto loans, consumer loans and commercial lending, while paying and receiving interest through conventional deposit products. These are not incidental investments or a small side segment; they are the issuer's principal operating model.
2. The income evidence independently exceeds the screen
The filing reports $12,145 million of net interest income against $15,231 million of total revenue for the quarter. This is a directly comparable minimum, not a claim that every other fee or payment line is prohibited. Even that minimum is far above a 5% activity benchmark.
3. Technology does not change the contract
Capital One invests heavily in software and describes itself as technology-led. Technology used to originate, service or collect conventional credit does not change the underlying contract: an interest-bearing loan remains riba regardless of the delivery channel.
Qualitative and ethical considerations
- Credit-card debt cycles: revolving balances and high APRs can create serious consumer-harm concerns in addition to the riba issue.
- Discover integration: the acquired network and card portfolio expand the combined credit and payments footprint and should be followed in future filings.
- Fee and servicing lines: interchange, servicing, late fees and other non-interest categories need contract-level review, but cannot cure a failed core business.
- Broader stewardship: fair lending, privacy, sanctions, financial inclusion, collections, systemic risk and consumer protection remain material ethical diligence topics.
The halal verdict
Capital One (COF) remains HARAM in ZakatInvest's qualitative classification and fails each examined quantitative screen. This is a structural business-activity disqualifier, not a situation where purification or a minority-revenue exception changes the answer. Investors should consult qualified guidance regarding disposal of income from an impermissible holding.
COF fails because conventional credit-card and banking interest is central to its business. Use the screener to review alternatives.
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