Marina Berthing Cost Calculator
Estimate marina slip costs by entering your boat's length and the local rate per foot. Marina fees are almost universally priced per linear foot of boat (LOA), so a longer boat pays more. Enter your boat length and the applicable daily or monthly rate and the calculator shows your daily, weekly, monthly, and annual costs. Use the electricity add-on to include liveaboard power costs.
Marina fee formula
Monthly fee = Boat length (ft) × Rate ($/ft/month) + Electricity
Daily fee = Boat length (ft) × Rate ($/ft/night)
Annual fee = Monthly fee × 12
This calculator uses the per-foot rate structure that is standard at marinas across the United States. The monthly rate is divided by 30 to estimate a daily rate when the monthly pricing type is selected.
Typical US marina rates (2025 reference)
| Location type | Monthly ($/ft) | Nightly ($/ft) |
|---|---|---|
| Small inland marina | $8 to $15 | $1.00 to $2.00 |
| Mid-size coastal marina | $15 to $25 | $2.00 to $3.50 |
| Major metro marina (e.g., Miami, NYC) | $25 to $50+ | $3.50 to $6.00+ |
Rates shown are indicative only. Always confirm current rates directly with the marina. Rates vary by season, amenities, and slip location within the marina.
Marina berthing cost calculator: frequently asked questions
How are marina slip fees typically calculated?
Most marinas charge by boat length (overall length or LOA) per foot per day, week, month, or season. A typical rate might be $15 to $25 per foot per month for a wet slip in the US. A 35-foot boat would cost $525 to $875 per month. Rates vary greatly by location, amenities, and season.
What is included in a marina slip fee?
Basic slip fees usually include use of the dock space, access to the marina, and basic security. Many marinas charge separately for electricity (liveaboard use can add $50 to $200 per month), water, pump-out services, Wi-Fi, and parking. Always confirm what is included before booking.
What is the difference between a wet slip and dry storage?
A wet slip keeps the boat in the water year-round. Dry storage (rack storage or hard-standing) keeps the boat ashore and launches it on request. Dry storage is often cheaper and reduces hull fouling, but requires advance notice for launching and is less convenient for frequent use.
Are marina fees tax-deductible?
For personal-use boats, marina fees are generally not tax-deductible. If your boat is used for a legitimate business purpose (charter, fishing guide, etc.) and you meet IRS requirements, some marina costs may be deductible. Consult a qualified tax professional for your specific situation.
How do transient slip fees differ from monthly rates?
Transient (nightly or weekly) slip fees are typically higher per day than monthly rates. A marina might charge $2 to $4 per foot per night for transient docking, versus $15 to $25 per foot per month for a monthly contract. If you stay more than about 10 nights per month, a monthly rate is usually more economical.
Official sources
- US Army Corps of Engineers (recreation marinas managed): Recreation.gov Marina Listings.
- National Park Service (marina operations): NPS Boating and Marinas.
Reviewed by the CalculatorHub team, edited by James Graham, 14 June 2026. See our methodology.