The Short Answer
Comfort Systems stock (FIX) is generally halal under this screen, with methodology-dependent caveats. Mechanical and electrical contracting, HVAC, plumbing, controls, off-site construction and fire-protection services are generally permissible at the activity level. The current filing shows low debt and low disclosed interest income, while the stricter MSCI receivables test differs from the broader contextual screens.
Current quantitative Sharia screen
Based on 10-Q figures for the period ended 2026-03-31; calculated 2026-07-13.
39.079 / 6,938.346
1,114.927 / 6,938.346
4,101.389 / 6,938.346
8.512 / 2,865.332
- Financial
- Fails
- Overall
- Fails
Debt is 0.56%, liquidity is 16.07%, receivables plus cash/assets is 59.11% and disclosed interest income/revenue is 0.30%; the receivables-plus-cash result exceeds the examined FTSE limit. End-customer revenue classification remains unavailable.
- Financial
- Fails
- Overall
- Fails
Debt, liquidity and interest income pass the examined limits, but receivables plus cash/assets is 59.11%, above the stricter MSCI total-assets receivables limit. This is a calculation against the named method, not an index-membership claim.
- Financial
- Pass
- Overall
- Incomplete
Debt is 0.56%, liquidity is 16.07% and disclosed interest income/revenue is 0.30%; the examined ratios pass. This is a calculation against the SAC ratios, not an official classification.
- Financial
- Not calculated
- Overall
- Not calculated
A properly licensed and reproducible historical market-cap series is not stored, so these methods are not estimated from a current spot price.
Business-activity disclosure
Comfort Systems provides general-purpose mechanical and electrical contracting, HVAC, plumbing, piping, controls, off-site construction, monitoring and fire-protection services across commercial, industrial and institutional facilities. These services are generally permissible at the activity level.
Limitation: The filing does not classify revenue by end-customer industry, project financing, facility use, defense exposure or other downstream attributes into a universal prohibited-revenue numerator.
Purification
Disclosed interest income is 0.30% of quarterly revenue. A screened end-customer revenue numerator is not separately disclosed, so this record does not prescribe a fixed purification percentage.
Inputs, assumptions and primary sources
- Inputs use Comfort Systems' March 31, 2026 Form 10-Q; amounts are USD millions converted from the filing's thousands presentation.
- Debt uses $0.025 million of current maturities plus $39.054 million of long-term debt. Operating lease liabilities and contingent earn-out obligations are retained as qualitative context rather than silently treated as conventional debt.
- Interest-bearing securities use $64.763 million of U.S. Treasury bills with maturities greater than 90 days. Cash and cash equivalents of $1,050.164 million are not double-counted as securities.
- Receivables use billed accounts receivable of $2,805.270 million, unbilled accounts receivable of $137.070 million and other receivables of $108.885 million.
- Quarterly revenue is $2,865.332 million and disclosed interest income is $8.512 million. The filing does not provide a universal prohibited-revenue numerator for mixed end-customer industries.
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.
This is a reproducible ZakatInvest calculation from Comfort Systems' first-quarter 2026 Form 10-Q, for the period ended March 31, 2026. It is not a fatwa, an index-membership claim or personalized investment advice.
Current Quantitative Screen (March 31, 2026)
- Debt / assets: 0.56% — below examined limits
- Cash + Treasury bills / assets: 16.07% — below examined limits
- Receivables + cash / assets: 59.11% — above the stricter FTSE and MSCI total-assets receivables limits
- Interest income / revenue: 0.30% — $8.512 million over $2,865.332 million
- Market-cap denominator methods: Not calculated because a licensed, reproducible historical market-cap series is not stored
The filing reports $6,938.346 million of total assets, $39.079 million of financial debt, $1,050.164 million of cash, $64.763 million of Treasury bills and $3,051.225 million of receivables. Operating leases and contingent earn-out obligations are retained as qualitative context rather than silently treated as conventional debt. End-customer revenue is not separately classified by industry or use.
What Comfort Systems Does
- Mechanical: HVAC, plumbing, piping, controls, off-site construction, monitoring and fire protection
- Electrical: Installation and servicing of electrical systems
- Lifecycle services: Building, installing, maintaining, repairing and replacing MEP systems
Comfort Systems operates primarily across commercial, industrial and institutional markets. First-quarter 2026 revenue was $2,865.332 million, split between mechanical and electrical segments.
Qualitative Issues to Keep in View
Mixed end-customer industries
Projects can serve data centers, semiconductor facilities, advanced manufacturing, healthcare, education, government, offices and retail. The filing does not quantify revenue by downstream use, so the screen does not treat every project as identical or invent a prohibited-revenue percentage.
Interest income and receivables
Comfort Systems reports $8.512 million of interest income, or 0.30% of quarterly revenue. Receivables plus cash are 59.11% of assets: that passes the broader contextual range used here but fails the stricter MSCI total-assets receivables limit. Purification and methodology choice remain scholar-specific.
Execution and acquisitions
Construction-contract estimation, customer concentration, labor availability, bonding, safety, project execution and acquisition integration require continuing diligence. Feyen Zylstra and Meisner are included in the current reporting perimeter.
How to Read the Result
Comfort Systems' general-purpose contracting activity is generally permissible and its debt, liquidity and disclosed income ratios pass the examined checks. The overall record is methodology-dependent because FTSE and MSCI receivables tests fail on the 59.11% contextual ratio, while end-customer revenue is not separately disclosed. Investors should consult a qualified Sharia adviser for their school of jurisprudence.
Bottom Line
Comfort Systems (FIX) is currently methodology-dependent but generally halal at the activity level, with 0.56% debt/assets, 59.11% receivables-plus-cash/assets and 0.30% interest-income/revenue as of March 31, 2026.
Methodology results differ on receivables; end-customer mix and purification remain review items.
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