Boat True Cost of Ownership
Example: Boat price: 45000 $ · Down payment: 9000 $ · Loan APR: 8 % · Loan term: 10 yrs · Slip/dock fee/yr: 3600 $ · Insurance/yr: 1200 $ · Maintenance/yr: 2500 $ · Winterization/yr: 800 $ · Days used per year: 20 · Years until you sell: 7 yrs
| True cost per day on water | $591 |
| All-in cost per year | $11,826 |
| Total cost of ownership | $82,779 |
| Boat worth at sale | $19,610 |
| Annual cost ÷ days used | $591 |
Worked example
A $45,000 boat used 20 days a year, with $3,600 slip fees, $1,200 insurance, $2,500 maintenance, and $800 winterization, plus loan and depreciation, can run $12,000+ per year. Over 20 outings, that is more than $600 for every single day on the water.
Frequently asked questions
Why is cost-per-day so high?
Because most owners use their boat far fewer days than they imagine, while the fixed costs — slip, insurance, loan, winter storage — run all year regardless. Dividing large annual costs by a handful of outings produces a steep per-day figure.
Would renting or a club be cheaper?
Often, yes, for occasional users. If your cost-per-day is very high, boat clubs, peer-to-peer rentals, or chartering can deliver the same days on the water for a fraction of ownership’s all-in cost.
How fast do boats depreciate?
Boats typically lose value quickly in the early years — often 15–20% up front and roughly 10% per year after — and this tool factors that resale loss into the total. Well-maintained, in-demand models hold value better.