🛠️ Boat Maintenance Cost Calculator
Estimate what a year of boat ownership really costs — the industry rule-of-thumb maintenance percentage plus your storage, insurance, and winterization — broken down line by line.
🧾 Tally the Year
🛠️ Annual cost of ownership
What is a Boat Maintenance Cost Calculator?
The purchase price is the ticket in the door; this calculator estimates the rent. It combines the widely used rule of thumb that upkeep runs about a tenth of a boat's value each year with the fixed bills you already know — the slip, the insurance policy, the winter haul-out — into one honest annual figure.
Seeing it as a monthly number is the reality check most first-time buyers need: the breakdown table shows where the money goes, and playing with the percentage shows how boat age and saltwater use change the picture. Budget it before you buy and the boat stays a joy instead of a bill.
❓ Frequently Asked Questions
Where does the 10% rule of thumb come from?
Marine surveyors and long-time owners widely quote annual upkeep at roughly 10% of the boat's value — covering engine service, bottom paint, zincs, canvas, electronics, and the endless small repairs. It's an average, not a law: new boats under warranty run less, older or saltwater boats more.
Should I adjust the maintenance percentage?
Yes — that's why it's a slider, not a constant. Drop it toward 5% for a newer, freshwater, lightly used boat; push it toward 15% or beyond for an aging hull, saltwater moorage, or heavy engine hours. Your service records after a season or two will tell you your true rate.
What do the itemized fields cover?
The fixed costs the percentage rule doesn't: storage or slip fees (often the biggest single line), hull and liability insurance, winterization and spring commissioning in cold climates, and a miscellaneous line for registration, safety-gear replacement, and club dues.
Is this what my boat will actually cost?
It's a planning estimate, not a quote — real costs swing with your region, boat age, and how much work you do yourself. The point is the order of magnitude: knowing a $40,000 boat plausibly costs $600+ a month to keep prevents the classic second-season surprise.