Boat Insurance Appraisal: Agreed Value vs Replacement Cost Explained for Owners

Every boat insurance policy handles a total loss one of two ways: it pays a number fixed in advance, or it calculates a number after the fact based on cost and depreciation. Which structure your policy uses changes what happens the day your boat is destroyed, stolen, or declared a constructive total loss. This guide covers how agreed value and actual cash value/replacement cost policies differ, why insurers require a formal marine appraisal on older, custom, or high-value boats before they'll write agreed value, and what our boat appraisal service actually documents beyond a single dollar figure.

What Agreed Value Means for Your Boat Insurance Policy

Agreed value is a policy structure in which the insurer and the boat owner fix the vessel's insured value at the time the policy is written, rather than calculating it after a loss occurs. If a total loss happens, the insurer pays that pre-agreed figure, subject to the policy's terms, without a depreciation argument at claim time. Industry guidance on agreed value versus actual cash value describes this as the main appeal of agreed value coverage: it removes uncertainty from the settlement process precisely when an owner can least afford a dispute.

That certainty has to be earned, though. Insurers do not simply accept whatever number an owner names. For a standard production boat, the starting point for an agreed value is usually the vessel's market value based on its type, age, and condition, and for a brand-new boat the purchase price often serves as that starting figure. For older, custom, or unusual vessels, insurers typically ask for a documented marine appraisal before they will commit to an agreed figure, which is where a professional survey earns its keep.

Agreed Value vs Actual Cash Value: How the Two Structures Compare

Actual cash value (ACV) policies work differently: they pay replacement cost minus depreciation, calculated at the time of loss rather than fixed in advance. Comparisons of the two structures note that ACV exposes the owner to more uncertainty and more negotiation with an adjuster, since the payout depends on condition and market comparables assessed after the boat is already gone.

Replacement cost coverage sits closer to agreed value in spirit but is usually reserved for newer boats. It pays what it costs to replace the vessel with a similar new one rather than a fixed dollar figure agreed in advance, which makes it most useful in the first few years of ownership before depreciation and market shifts complicate the math.

Feature	Agreed Value	Actual Cash Value / Replacement Cost
When the value is set	Fixed at policy inception, before any loss	Calculated at the time of loss
Total loss payout	The pre-agreed figure, per policy terms	Replacement cost minus depreciation
Best suited for	Older, custom, limited-production, or high-value boats	Newer boats still close to purchase price
Dispute risk at claim time	Low; the number was settled in advance	Higher; condition and comparables are argued after the loss
Typically requires a formal appraisal	Yes, especially above a certain value or age	Less often; insurer may rely on purchase price or standard valuation guides

Most owners of newer, mass-produced boats never think about this distinction because their insurer defaults to a replacement cost or ACV structure without much friction. The distinction matters most once a boat is older, modified, or built in limited numbers, which is exactly when insurers start asking questions.

Why Insurers Require a Marine Appraisal for Certain Boats

Insurers ask for a professional appraisal when the vessel is old enough, unusual enough, or valuable enough that a standard pricing guide can't reliably support an agreed value figure. Industry sources describe appraisals being required for agreed-value coverage above a certain threshold, though the specific number is a matter of carrier practice rather than a single universal rule. One marine insurance resource frames this as standard underwriting caution rather than statute: the older or more customized the boat, the less a generic valuation source can be trusted.

As a matter of general industry practice, several situations tend to trigger the appraisal requirement:

• Age: Many insurers look more closely at boats in roughly the 15 to 25 year range and older, though the exact cutoff varies by carrier, boat type, and coverage amount rather than following a fixed legal rule.
• Custom or limited-production builds: A one-off design, a heavily modified boat, or a small production run has no reliable pool of comparable sales, so standard pricing guides fall short.
• Wood and classic construction: Vessels built from materials or methods outside the mainstream fiberglass production market often need a specialist's eye to establish condition and value. Guidance on insuring wood boats points to this as a recurring reason underwriters ask for a survey before quoting agreed value.
• High-value vessels: Above a certain purchase price, insurers want independent documentation rather than relying solely on the owner's stated figure.

A documented appraisal gives the underwriter something a purchase invoice or an online pricing guide cannot: an independent, dated conclusion of value tied to the boat's actual condition, equipment, and market comparables. That conclusion is what supports the agreed value figure written into the policy.

What a Marine Surveyor or Appraiser Actually Documents

A marine appraisal for insurance purposes is not just a number on a page. Our appraisers, credentialed through organizations such as ASA, CAGA, and NAMS (the marine survey credential), are expected to hand the underwriter both a value conclusion and a condition assessment, because insurers use the same report to price risk as well as set the agreed figure.

1. Identify the vessel. Hull identification number, make, model, year, and build specifications get documented and verified against title and registration records.
2. Assess construction and condition. The appraiser inspects hull, deck, rigging, mechanical systems, and electronics, noting wear, prior repairs, and any deviation from original specification.
3. Document with photographs. A thorough photo record supports both the value conclusion and any condition findings that matter to underwriting.
4. Research comparable sales. The appraiser identifies sold comparables in the relevant market to anchor the fair market value conclusion, adjusting for the subject boat's specific condition and equipment.
5. Conclude value and flag risk. The final report states a market value and/or replacement value conclusion, and separately flags any safety or suitability-for-use shortcomings the insurer should know about, along with recommendations to address them.

That last step is what separates a marine insurance appraisal from a simple valuation. The insurer isn't only buying a defensible number; it's buying a professional's judgment on whether the boat is safe to insure as-is.

Partial Losses: Where the Two Policies Diverge Further

Agreed value mainly governs what happens on a total loss. Partial losses, such as storm damage to a hull or a fire that destroys the interior but leaves the vessel repairable, are frequently settled differently even under an agreed value policy. Industry discussion of property value options notes that partial losses are often adjusted on an actual cash value or repair-cost basis regardless of how the total loss figure was set, which surprises owners who assumed "agreed value" meant every claim was pre-negotiated.

This is worth confirming in writing before a claim, not after one. A policy can carry an agreed value for the hull as a whole while still handling a torn sail, a damaged engine, or a cracked hull section under a separate repair-cost or ACV method. Reading the policy's loss settlement clause, and asking the agent directly how partial losses are handled, closes that gap before it becomes a dispute.

What to Expect When You Schedule an Appraisal

A marine insurance appraisal is scoped and quoted as a fixed fee before any work begins; it is never billed by the hour. The fee reflects the complexity of the vessel, the completeness of existing records (survey history, prior appraisals, maintenance logs), and the depth of research required to support the value conclusion, not the boat's market value itself. A well-documented, recently surveyed production boat is a simpler assignment than a 30-year-old custom-built vessel with no paper trail, and the fee is scoped accordingly.

Records worth having on hand before the appraisal include:

• Title and registration documents confirming ownership and hull identification.
• Prior survey or appraisal reports, even if outdated, since they give the appraiser a baseline for condition changes.
• Maintenance and repair records, particularly for engines and major systems.
• Photos or documentation of any custom modifications that a standard comparable sale wouldn't reflect.

Engine condition and documented hours are also part of what an appraiser weighs when forming a value conclusion, since they directly affect both market value and the insurer's risk picture; our guide on how engine hours shape a boat's appraised value walks through that in more detail.

Getting the Agreed Value Right Before You Need It

The worst time to discover a gap between what you thought your boat was insured for and what the policy actually pays is the week after a total loss. An agreed value backed by a documented, dated appraisal removes that guesswork, and a replacement cost or ACV policy makes more sense for a newer boat still close to its purchase price. Either way, the conversation with your insurer goes faster when you show up with a professional report rather than a guess.

If your boat is older, custom-built, or carries a value your insurer wants independently confirmed, request an appraisal and our team will scope the assignment and quote a fixed fee before any work begins.

This article is provided for general informational purposes only and does not constitute legal, tax, or financial advice. Readers should consult a qualified insurance professional or attorney regarding their specific policy and circumstances.