How much does excavation insurance cost in New Hampshire? (2026)

Recent rate-filing activity — 1 state filings across 1 commercial line

Commercial carriers can't charge whatever they want — each state's Department of Insurance must approve loss-cost filings before they take effect. These are primary-source, government-held records available on SERFF Filing Access. Cited below: the most-recent active filings affecting excavation operations, each cited to the regulator or bureau filing it came from.

Source: SERFF Filing Access (filingaccess.serff.com) — the official public-records interface for state Department of Insurance filings. Loss-cost changes shown are the overall bureau-wide change in each state; the actual impact on your quote depends on your class code, payroll, experience modifier, and carrier-specific loss-cost multiplier (LCM). Get a quote for your exact numbers.

National context — Excavation insurance overview

An excavation contractor's catastrophic claim is a buried-utility strike — a gas line, fiber, or water main hit while digging. And here is the trap: standard general liability is frequently endorsed to exclude underground damage — the "U" in XCU (explosion, collapse, underground). One strike can run into six figures uninsured unless XCU is confirmed or bought back. Our own quote data shows these contractors request general liability and commercial auto (the haul trucks) first — the page's job is to make sure that GL actually includes underground coverage.

As an industry-typical estimate, a site-prep operation runs roughly $5,000–$20,000+/year across general liability with XCU, contractor's tools & equipment, commercial auto on the dump trucks, and payroll-rated workers' compensation — trench and excavation work is high-hazard. No insurance bureau publishes excavation premiums, so every dollar here is an estimate; each coverage fact is sourced to a named authority (IRMI, III). Use the calculator below, then get a real quote in 5 minutes.

Industry-typical market ranges (national)

Sourced from III, NCCI, ISO, NAIC, BLS, FMCSA, FDA, NRA — government and bureau publications, not from our quote form

Coverage lines a site-prep / excavation contractor typically carries (industry-typical estimates):

• XCU (explosion, collapse, underground): the trade-defining line — standard GL is often endorsed to exclude underground damage, so a struck buried utility must be covered by confirming/adding XCU. IRMI XCU definition.
• Contractor's tools & equipment (inland marine): excavators, skid steers, and attachments on the jobsite or in transit. III inland marine.
• Commercial auto: dump trucks and haul vehicles — the largest single line for excavators. III commercial auto.
• Workers' compensation: trench/excavation is high-hazard work — mandatory with employees in nearly every state. III workers comp.

Depth of digging, proximity to buried utilities, and fleet size are primary rating factors.

For New Hampshire-specific direction, see the filed-rate table above.

Get your actual New Hampshire quote in 5 minutes

The data above is regulator-filed direction. Your actual New Hampshire quote depends on class code, payroll, experience modifier, and the LCM each carrier files.

More New Hampshire rate-filing detail

• All New Hampshire commercial rate filings (every line, every recent filing) — the broader rate-data view for New Hampshire
• Rate filings by state — directory of all 47+ states with active filings
• National Rate Change Tracker — every filing across every state, sortable

Get a real New Hampshire quote for excavation

The data above shows the regulator-filed direction for New Hampshire. For your actual quote — based on payroll, experience modifier, and the LCM each carrier files — request a free quote in under 90 seconds.

Related guides

• General Liability glossary entry
• Class Code glossary entry
• Our sourcing methodology

Sources cited (national context above)

1. XCU - Explosion, Collapse, and Underground — International Risk Management Institute (IRMI), 2024
2. Understanding Inland Marine Insurance — Insurance Information Institute (III), 2024
3. Commercial Auto Insurance — Insurance Information Institute (III), 2024
4. Workers Compensation Insurance — Insurance Information Institute (III), 2024