Shore power is the most variable utility cost at most marinas — flat-rate plans range from $30 to $300+ per month and metered plans can run double for liveaboards or A/C-heavy summer use.
30A service typically runs $30–$80 per month flat-rate, $0.18–$0.45 per kWh metered. Enough for one A/C unit and basic appliances on most cruisers.
50A service is $60–$160 month flat-rate. Required for boats over 40 ft, larger sailboats with dual A/C, and most modern center consoles with charging requirements.
Twin-50A (100A) and 200A service for yachts 60 ft+ is almost always metered. Expect $300–$1,500+ per month for summer liveaboard or A/C-heavy use.
Reading the per-foot number correctly
A per-foot rate is a starting point, not a quote. Two marinas advertising the same number can produce monthly totals $300–$500 apart for the same boat once they apply slip-length billing, beam premiums, tax, and shore-power markup.
When you compare marina electricity & utility costs across marinas, build a three-line worksheet for every quote: base rent, utilities and recurring fees, and one-time deposits. That's the only way to compare apples to apples.
Marina Electricity & Utility Costs — 2025 Price Ranges
| 30A flat-rate | $30 – $80 / month |
| 50A flat-rate | $60 – $160 / month |
| Twin 50A (100A) | $150 – $400+ / month |
| 200A+ (metered) | $300 – $1,500+ / month |
| Metered kWh | $0.18 – $0.45 / kWh |
| Pump-out | $5 – $25 per event |
| Wi-Fi | $20 – $60 / month |
Cost by boat size
| 25 ft boatMinimum slip lengths often make small boats pay for 25–30 ft even when the hull is shorter. | $300 – $1,500/mo |
| 35 ft boatThe broadest inventory category; standard 30A or 50A power and conventional wet slips. | $420 – $2,100/mo |
| 45 ft boatMore beam and power requirements start narrowing the slip pool in older marinas. | $540 – $3,150/mo |
| 60 ft yachtDeep-water and end-tie inventory becomes important; some marinas add yacht premiums. | $900 – $4,800/mo |
| 80 ft yachtExpect 100A power, wider fairways, stronger docks, and more limited availability. | $2,800 – $9,600/mo |
Cost by marina type
| Basic municipal marinaBest value, fewer resort amenities, often longer waitlists. | $12 – $30/ft/mo |
| Full-service marinaFuel, pump-out, repair vendors, laundry, showers, and active dockmaster support. | $18 – $45/ft/mo |
| Resort marinaPools, restaurants, concierge, valet, hotel access, and vacation-style amenities. | $35 – $80/ft/mo |
| Yacht or mega-yacht marinaDeep-water slips, high-amp power, crew facilities, and premium security. | $50 – $200+/ft/mo |
Cost by region
| Inland lakesLowest average rates; covered slips and seasonal contracts are common. | $12 – $25/ft/mo |
| Gulf CoastStrong value, hurricane clauses, and good monthly availability outside winter. | $15 – $35/ft/mo |
| Florida East CoastHigh demand from year-round boaters, liveaboards, and yacht traffic. | $25 – $70+/ft/mo |
| Chesapeake / Mid-AtlanticBalanced pricing with seasonal contracts and strong sailboat infrastructure. | $18 – $40/ft/mo |
| Northeast / CaliforniaShort-season or scarce-waterfront markets command premium rates. | $25 – $80+/ft/mo |
The fees nobody mentions on the phone
The phone quote covers base rent. The real bill includes electric, tax, pump-out, parking, key fobs, dock-box rental, mandatory resort fees, environmental surcharges, and sometimes a "marina fee" that's really a markup on shore power.
For longer stays, also ask about contract minimums, automatic renewal, break-lease penalties, and what happens to your deposit if the marina reassigns your slip. None of these are unreasonable on their own — they're only a problem when you don't know they exist.
Three boats, three very different bills
30-foot center console, inland lake, weekend use: roughly $450–$900/month all-in. Power is light, fees are predictable, and minimum-slip-length billing is usually the biggest variable.
42-foot sailboat, Chesapeake or mid-Atlantic, year-round: typically $900–$1,700/month with winter haul-out cycles and seasonal storage often calculated separately.
55-foot motoryacht, South Florida, full-time liveaboard with two ACs: $2,500–$5,000+/month is realistic once you stack base rent, 50A power, liveaboard fees, tax, and insurance-driven slip choices.
Use these as scaffolding. Your actual quote will move with the specific harbor, the specific slip, and what the marina decides to put on each line of the bill.