How accurate are NADA boat values?

NADA boat values are a useful starting benchmark, but they are not precise enough to price a specific boat on their own, since they can run anywhere from a few percentage points to 20 to 30 percent off actual selling prices depending on the market.

NADA (now JD Power) marine values are built from historical sales data, including dealer transactions, auction reports, and private-party sales. That makes them a reasonable average for a given make, model, and year, but they don't account for what makes an individual boat different: engine hours, a recent repower, electronics upgrades, maintenance history, or the trailer included in the sale. They also lag real-time market conditions, since guide values are typically updated only periodically, and they can miss regional demand swings entirely. A boat in a high-demand coastal market can sell well above its NADA figure, while one in a slow local market may sell below it.

For a rough sense of what a boat might be worth, NADA is a fine starting point. But for anything with financial or legal weight attached, such as an insurance claim, an estate settlement, a divorce proceeding, or a loan application, a book value alone won't hold up the way a documented appraisal will. A marine vessel appraisal accounts for the vessel's actual condition, systems, equipment, and upgrades, and cross-references real comparable sales rather than averaged historical data.

When NADA falls short:

• It doesn't reflect a specific boat's condition, hours, or recent repairs.
• It doesn't capture local market demand or regional price differences.
• It doesn't account for upgrades like electronics, repowers, or custom work.
• It isn't prepared in accordance with USPAP, so it won't carry weight with insurers, courts, or lenders the way a formal appraisal will.

If you're relying on a boat's value for anything beyond a general estimate, see is a boat appraisal necessary for value for more on when a documented appraisal matters.