2026 · Construction Firms · 47-control checklist

Cyber Insurance Requirements for Construction Firms

Construction firms move large sums on predictable schedules, progress draws, subcontractor payments, retention releases, and that rhythm is exactly what makes them a prime target for payment-diversion fraud. An attacker who compromises a project manager’s mailbox can watch for a real invoice, then send updated "banking details" that reroute a six-figure draw to their own account. For most contractors, business email compromise, not ransomware, is the loss that actually shows up, and underwriters know it.

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Why cyber insurance is different for construction firms

The risks underwriters price for your vertical

The sector’s structural risk is its sprawl. Projects span multiple sites, a rotating cast of subcontractors and architects exchange bid documents and CAD files, and field staff work from phones and laptops on job-site networks the company does not control. There is rarely a central IT team. The regulatory pressure is lighter than in healthcare or finance, but contractual obligations are real, owners and GCs increasingly require cyber coverage and basic controls in their contracts, and government or critical-infrastructure projects can carry CMMC-style requirements.

Because the dominant loss is fraudulent payment, underwriters weight the controls that break the BEC chain: MFA on every mailbox, email authentication (DMARC/SPF/DKIM) to stop domain spoofing, and security-awareness training for the project managers and accounting staff who approve payments. They also care about backups (project schedules and CAD files are the firm’s working memory) and about how a distributed, mobile workforce connects. A contractor that has locked down email and trained the people who release money is a meaningfully better risk.

What’s driving the requirements

The regulatory and contractual pressures underwriters expect construction firms to have already accounted for.

Business email compromise / payment-diversion fraud as the dominant claim type
Owner, general-contractor, and project-contract requirements to carry cyber coverage
Subcontractor and design-partner data exchange (bid documents, CAD, banking details)
CMMC / federal contracting security requirements on government and defense projects

Priority controls

The 7 controls insurers weight most for construction firms

Drawn verbatim from the 47-control Cyber Insurance Prep Checklist, with why each one matters specifically for your vertical.

CI-01CRITICALMFA
Require multi-factor authentication on every email account.
A compromised project manager mailbox is the source of nearly every construction payment-diversion loss; MFA on email is the highest-leverage control.
CI-15HIGHEmail Security
Publish DMARC set to p=quarantine or p=reject.
Attackers spoof the firm’s domain to fool owners and subs into paying the wrong account; DMARC enforcement protects the company’s name on every invoice.
CI-34HIGHAwareness
Provide security awareness training to all employees annually.
The people who approve draws and change vendor banking details are the human firewall; carriers want them trained to verify changes out-of-band.
CI-02CRITICALMFA
Require MFA for all remote access, VPN, RDP, and SSH.
A mobile, multi-site workforce connects remotely from the field; MFA on remote access keeps a lost laptop or job-site Wi-Fi from becoming an intrusion.
CI-31CRITICALBackups
Keep at least one air-gapped or append-only backup.
Project schedules, CAD, and submittals are the firm’s operational memory; an air-gapped backup keeps a ransomware hit from stalling active jobs.
CI-43MEDIUMAsset Management
Monitor and address shadow IT (unapproved SaaS tools).
Field teams adopt unsanctioned file-sharing and SaaS tools to move drawings; underwriters ask about shadow IT because it scatters sensitive project data.
CI-09HIGHEndpoint
Deploy Endpoint Detection & Response (EDR) on all endpoints.
EDR on company laptops catches malware picked up on untrusted job-site and hotel networks before it spreads back to the office.

These are 7 of the 47 controls. The full checklist covers all of them, required, premium-affecting, and disqualifying, with verification and remediation steps.

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Construction Firms cyber insurance, FAQ

Why is wire fraud the main cyber risk for construction firms?

Construction runs on scheduled large payments, draws, sub payments, retention, which gives attackers a predictable target. By compromising a mailbox and impersonating the firm or a subcontractor, they reroute a legitimate payment to a fraudulent account. Underwriters focus on MFA, email authentication, and payment-verification training because those controls stop this specific attack.

We don’t have an IT department. What do underwriters expect?

Carriers do not expect a contractor to run a security operations center; they expect the high-leverage basics to be in place, MFA on email and remote access, email authentication, trained payment-approvers, and a working backup. Most of these can be configured inside the email and Microsoft 365 or Google Workspace you already use.

Do project owners and GCs require us to have cyber insurance?

Increasingly, yes. Construction contracts now frequently require contractors and subs to carry cyber coverage and to maintain baseline controls, and government or defense work can add CMMC-style requirements. Having this checklist in place makes both the insurance application and the contract compliance straightforward.