Boat EconomicsKeep, Repair, Upgrade, Resale, and Review
How Much Does Resale Uncertainty Actually Move the Decision?
See how a low, central, and high resale scenario changes net ownership cost and equity, so a single resale guess never gets treated as market fact.
These are scenarios you provide, not an appraisal, market forecast, or guaranteed sale price. Reference dated listings or a valuation document if you have them, and expect the actual sale price to differ.
A single depreciation number hides how uncertain resale actually is
Ownership-cost estimates often plug in one resale figure and move on, treating it as settled when it's really a guess. This engine forces a low, central, and high scenario and shows the resulting spread in net ownership cost, so you can see for yourself whether the decision is fragile to that guess or holds up across the whole range.
How this is calculated
Net ownership cost, for each scenario, adds the purchase price, expected condition/maintenance spend, and transaction costs, then subtracts resale value (plus any accessories that add to it). If you enter a remaining loan balance, equity subtracts transaction costs and the loan balance from resale. The spread between the low and high scenario's net ownership cost shows how sensitive the whole picture is to the resale guess.
Worked example
A $30,000 boat with $5,000 in expected condition and maintenance spend over five years, against a $10,000 to $20,000 resale range, produces a net ownership cost of $25,000 at the low end and $15,000 at the high end, a $10,000 spread driven entirely by the resale uncertainty. If both ends land far from an owner's target ownership cost, the decision is stable; if the target sits inside that range, it's genuinely resale-dependent.
Common mistakes
Anchoring on the high end of a resale range because it makes ownership look cheaper is a common bias; the low end deserves equal weight unless there's a real reason to expect better than average. The other mistake is treating a comparable listing's asking price as equivalent to an actual sale price, they routinely differ.
Frequently asked questions
Is the "high" resale scenario an appraisal or a promise?
No. All three scenarios are numbers you provide, informed by dated listings or your own valuation research if you have them. This tool never calls any of them an appraisal, market forecast, or guaranteed sale price.
Why does the resale range matter if I am not selling soon?
Even a distant, hypothetical sale affects the real economics of ownership today, since resale value offsets the total cost you're carrying. Seeing how sensitive your net ownership cost is to that uncertain number helps you judge how much weight to put on any single resale guess.
What does "required resale for a target" solve for?
If you have a specific net ownership cost in mind, decisions like "I need this to cost me no more than $X over five years," this solves the resale value that would need to happen for that target to be met, so you can judge how realistic it is against your own low-to-high range.
How is this different from Current Boat Remaining-Life Cost?
That engine estimates the forward cost of keeping your current boat, generally without a resale scenario range. This one is specifically about how sensitive an ownership or upgrade decision is to resale uncertainty, useful whenever resale value is a real unknown in the decision.