TWIA Explained: Texas Windstorm Insurance for the P&C Exam

The Texas Windstorm Insurance Association (TWIA) is a state-created residual insurance market that provides wind and hail coverage to property owners along the Texas coast where private insurers won't write policies due to hurricane risk.

It is not a state agency in the regulatory sense — TWIA is a non-profit association of all property insurers licensed to write business in Texas. Membership is mandatory: if you sell P&C insurance in Texas, you are automatically a TWIA member and share in its profits, losses, and assessments.

For the Texas P&C exam, TWIA appears in roughly 4-6 questions. Get these right and they're almost free points; miss them and you've handed back significant scoring potential.

The Texas coast — from Brownsville up through Galveston and east to the Louisiana border — sits in one of the most hurricane-exposed regions in the United States. After major storms (Carla, Alicia, Allen, Ike, Harvey), private insurers withdrew or sharply restricted coverage in the 14 counties along the coast and certain parts of Harris County.

Without TWIA, coastal property owners would have no path to insure their homes against wind and hail damage — making mortgages, businesses, and economic development in coastal Texas effectively impossible. The Texas legislature created TWIA in 1971 to fill that gap.

This is the policy logic the exam tests: TWIA is the insurer of last resort for wind and hail in designated coastal areas where private market won't write.

TWIA writes a narrow band of coverage:

• Windstorm and hail damage only — to property in designated coastal counties
• Residential properties: up to $2,073,000 coverage limit (as of 2026, adjusted periodically)
• Commercial properties: up to $4,424,000 coverage limit
• Manufactured homes: separate, lower limits

What TWIA does not cover:

• Fire (covered by private homeowners or dwelling policies)
• Liability
• Theft
• Flood (that's NFIP)
• Damage from wind-driven rain unless wind first creates an opening in the structure

A typical coastal property owner buys: a private homeowners policy for fire/liability/theft (with the windstorm peril excluded) AND a TWIA policy for the wind/hail piece AND an NFIP flood policy. Three separate policies for what coverage in non-coastal counties is bundled into one.

TWIA covers property in 14 first-tier coastal counties plus parts of Harris County east of Highway 146:

• Aransas, Brazoria, Calhoun, Cameron, Chambers, Galveston, Jefferson, Kenedy, Kleberg, Matagorda, Nueces, Refugio, San Patricio, Willacy, and a portion of Harris County

To qualify for TWIA coverage, the property must:

1. Be located in one of the designated areas
2. Have been declined by at least one private insurer for windstorm coverage
3. Meet TWIA's building code requirements — properties built or substantially improved after January 1, 1988 must have a Certificate of Compliance (WPI-8 form) showing they meet windstorm-resistant construction standards

The WPI-8 requirement is particularly testable. New coastal construction without a WPI-8 cannot get TWIA coverage. Older properties (pre-1988) are grandfathered but pay higher premiums.

This is one of the most testable areas of TWIA on the exam — the funding waterfall for catastrophic losses.

When TWIA pays out claims, the money comes from these sources in this specific order:

1. Premiums collected from TWIA policyholders
2. Catastrophe Reserve Trust Fund (CRTF) — held in the state treasury, built from net premiums over time
3. Class 1 public securities — bonds funded by future TWIA premiums (up to $500 million)
4. Class 2 public securities — additional bonds funded 70% by member insurers via assessments and 30% by surcharges on coastal policyholders (up to $250 million)
5. Class 3 public securities — additional bonds funded by member insurer assessments (up to $250 million)
6. Reinsurance — TWIA buys catastrophe reinsurance to cover losses beyond the bond layers

The total funding stack is designed to cover a 1-in-100-year hurricane loss without requiring direct state appropriations. After Hurricane Harvey (2017), TWIA exhausted significant portions of these layers, leading to higher premiums and stricter eligibility rules.

Several distinctions appear repeatedly on the exam:

Premium-setting

TWIA premiums are set by the TDI Commissioner, not by TWIA itself. This is different from private insurers, who file rates that TDI then approves or denies. TWIA proposes rates to TDI; TDI sets them.

Profit motive

TWIA is non-profit. Premiums are designed to cover claims and reserves, not generate profit for shareholders. Private insurers operate for profit.

Member assessments

If TWIA losses exceed available funds in a given year, every member insurer (every company licensed to sell P&C in Texas) shares the loss proportional to their Texas market share. This is unique — in most states, residual market losses are absorbed differently.

Wind-driven rain rule

TWIA covers wind-driven rain damage only if wind first damaged the structure to allow water entry. Without that prior structural damage, water intrusion is excluded. This trips up exam takers because it sounds counterintuitive.

Examples of how TWIA appears on the Texas P&C exam:

Pattern 1: Eligibility

"A homeowner in Galveston County built her house in 2020 without obtaining a WPI-8 certificate. Can she purchase TWIA coverage?"

Answer: No. Properties built or substantially improved after January 1, 1988 must have a WPI-8 Certificate of Compliance to qualify for TWIA coverage.

Pattern 2: Coverage Limits

"A small commercial property owner in Cameron County wants to insure her $5 million warehouse against wind through TWIA. What is the maximum coverage available?"

Answer: ~$4.4 million. TWIA's commercial limit caps below this property's value, leaving an uninsured gap she'd need to cover via surplus lines or self-insurance.

Pattern 3: Funding

"After premiums and the CRTF are exhausted, what is the next source of funds for TWIA losses?"

Answer: Class 1 public securities — bonds repaid from future TWIA premiums, up to $500 million.

Pattern 4: Coverage Scope

"During a hurricane, wind blows shingles off a coastal home, then heavy rain enters through the roof and damages the interior. Is the interior damage covered under a TWIA policy?"

Answer: Yes. Wind first damaged the structure (roof), creating the opening that allowed water entry. TWIA covers consequential water damage in this case. If rain had soaked the interior without prior wind damage to the structure, it would not be covered.

The Texas FAIR Plan and TWIA are sometimes confused on the exam — they serve similar "insurer of last resort" functions but for different perils:

• TWIA = wind and hail in coastal areas
• Texas FAIR Plan = fire, theft, and other property perils for properties anywhere in Texas that can't get coverage in the standard market (typically due to property condition, location, or other underwriting factors)

A coastal property owner might need both: TWIA for wind/hail, FAIR Plan for fire/theft if private insurers won't write them either. They're complementary, not competing.

If you'll work as an agent in coastal Texas, TWIA isn't just exam material — it's part of nearly every coastal P&C quote you'll write. Knowing the eligibility rules, premium structure, and what TWIA does and doesn't cover is daily working knowledge for coastal agents.

Even if you'll work inland, TWIA affects you indirectly: any loss exceeding TWIA's funding stack is paid via member insurer assessments — meaning your future agency will share in any catastrophic Texas hurricane loss. This is why Texas insurance regulation pays such attention to TWIA's solvency.

TWIA is one piece of the Texas-specific statutes section of the exam. To ace the section as a whole:

• Texas Insurance Statutes — full guide — covers TDI authority, agent licensing, unfair trade practices, and CE requirements
• 3-Week Study Plan — Texas-specific content is concentrated in Week 3 (days 15-18)
• 25 Free Practice Questions — includes Texas-specific samples

For audio coverage of all 8 exam content areas including Texas statutes, try Chapter 1 of LanePrep free — Chapters 7 and 8 cover TWIA, FAIR Plan, TAIPA, workers' comp, and TDI rules in depth.