Slip vs Trailer vs Dry Stack: Real Cost per Year (2026)

You have a boat picked out, a marina quote in one tab, and a nagging feeling that the trailer in the driveway would be cheaper than both. It would be — usually by a factor of five or more. But storage is not just another line item you add at the end. It is the decision that quietly sets the size, the hull type, and sometimes the state of the boat you should be shopping for. Get the order backwards and you buy a boat you cannot afford to park.

The short answer

For a typical 25-foot boat, the three storage models land here per year:

Storage model	Typical annual cost	Over five years	Bottom paint?
Trailer at home	$150–$600	$750–$3,000	No
Trailer in an outdoor lot	$600–$2,400	$3,000–$12,000	No
Dry stack (rack)	$2,400–$7,200	$12,000–$36,000	No
Wet slip, seasonal (northern)	$3,600–$6,500	$18,000–$32,500	Yes
Wet slip, year-round (coastal)	$4,000–$15,000+	$20,000–$75,000+	Yes

Trailering is not slightly cheaper than a slip. It is an order of magnitude cheaper, and it stays cheaper every year you own the boat. Dry stack sits in the middle and buys back most of the convenience. A slip buys one thing the other two cannot: a boat that is rigged, powered, and ready without a forklift call or a launch ramp.

Everything below is the detail that decides where in those ranges you land.

What a slip actually costs, using published rates

Slip pricing is per foot, so it looks simple until the invoice arrives.

The Chicago Park District’s harbor system publishes its 2026 season rates, and they are a fair mid-to-high freshwater benchmark. A 30-foot stall runs $75 per foot at Jackson Park, $114 per foot at DuSable Harbor and $124 per foot at Burnham. Take Burnham — that is $3,720 for the season on a 30-footer. Chicago then adds 23.25% tax, taking it to about $4,585, and a non-resident pays a further 20% on top, landing near $5,500.

And that is one season, not a year. The boat still has to go somewhere in January. Chicago’s own dry storage at Belmont and Montrose is $44.50 per foot for winter only — another $1,335 on a 30-footer — or $72.50 per foot for summer and winter together, with a 22-foot minimum.

At the expensive end, the City of Key West charges $85.15 per foot per month for transient dockage, water included and electricity metered, capped at 120 days a year. On a 25-footer that is $2,129 a month. Transient rates are not an annual lease, but they tell you what waterfront is worth in a market where there is no more of it to build.

One trap that catches nearly everyone: slips are billed on length overall, which includes the bow pulpit and the swim platform, not the number in the listing headline. A “24-foot” center console with an engine bracket and a platform is routinely billed as 27 feet. Ask the marina how they measure before you commit to a budget. The same length-overall math drives your insurance quote — see boat insurance cost for how the two interact.

The fees each model hides

A wet slip hides:

• Bottom paint. Any hull living in salt or brackish water needs antifouling, generally every one to three years, and it is a four-figure job on anything over 20 feet. This is the single largest cost that dry-stored boats simply do not have.
• Electric and pump-out. Shore power, especially year-round with a battery charger and a dehumidifier running, is a monthly surcharge in most marinas.
• The winter package in cold climates. Haul, block, winterize, shrink wrap, then splash and commission in spring. In a seasonal market this is a second bill on top of the slip.
• The waitlist. In constrained harbors a slip is not a purchase, it is a queue. Confirm you can actually get one for your length before you buy the boat, not after.
• Faster corrosion and growth. A boat that lives in salt water ages differently from one that lives dry — see outboard salt corrosion for what that does to the engine you are buying.

A dry stack hides:

• Launch windows. Most racks want 30 to 60 minutes’ notice and stop launching in the early evening. Sunrise fishing and sunset cruises get complicated, and a spontaneous “let’s go out” mostly stops existing.
• In-and-out limits. Some facilities cap free launches per month and charge per launch beyond that. If you boat every weekend, ask for the cap in writing.
• Height and weight caps. Hardtops, towers, radar arches, and heavy repowers can push a boat out of its rack tier or out of the building entirely. Measure to the top of the tallest fixed structure, not to the gunwale.
• No leaving it rigged. Nothing stays on the boat between trips in most facilities. If you fish with a lot of gear, that is a real friction cost.

A trailer hides:

• The tow vehicle. Boat, engine, trailer, full fuel, batteries, and gear all count against your rating. If the answer is a new truck, storage just became the most expensive option on the list.
• The trailer itself. Bearings, brakes, tires with a date code under six years, working lights, and a title in the seller’s name. A neglected trailer is a four-figure repair and a highway breakdown waiting to happen — boat trailer value covers what one is worth and what to deduct when it is missing.
• HOA and municipal rules. Plenty of neighborhoods ban a trailer in the driveway or require it behind a fence. Check the covenant before you assume home storage is free.
• Ramp fees and time. A launch fee is small. Twenty to forty minutes at each end of every trip is not, and it is the reason trailer boats get used less than their owners expected.

The 102-inch rule that decides what “trailerable” means

Federal rules cap vehicle width at 102 inches — 8 feet 6 inches — on the National Network of highways, under 23 CFR 658.15, with Hawaii allowed to keep a 108-inch maximum. States may grant special use permits above 102 inches, but a permit brings route restrictions, allowed hours, and paperwork every single time you tow.

That one number is why boat sizes cluster where they do. Builders design to the limit, so the practical ceiling for casual trailering sits around 25 to 26 feet for most hull types. Check the beam on the spec sheet, not the length: a 26-foot hull with an 8-foot-4 beam tows legally, while a 24-foot wide-beam deck boat or pontoon at 8-foot-10 does not.

If a seller tells you a boat is “trailerable,” the correct follow-up is one question: what is the beam?

What our own listings say about the boat this choice picks for you

This is where storage stops being a budget line and starts being a buying rule.

Across 23,166 active used-boat listings in the US that clear our filters — real listings, not new inventory, priced between $800 and $2,000,000 — 5,920 state a length. Here is what they ask:

Length	Listings	Median asking price
Under 24 ft	3,994	$5,900
24–25 ft	544	$18,500
26–27 ft	318	$16,000
28–29 ft	149	$27,000
30–32 ft	305	$20,000
33 ft and up	610	$44,000

Now look at the two rows that decide your storage bill. A 24–25 ft boat — the largest size most people can tow without a permit — asks a median of $18,500 across 544 listings. A 30–32 ft boat, which in most of the country has to live in the water, asks a median of $20,000 across 305 listings.

The purchase prices are about $1,500 apart. The storage costs are $4,000 to $12,000 apart, every year.

That is the whole trap in the used market. Big older boats are cheap to buy precisely because they are expensive to keep, and the market has already priced that in. Among the 26 to 32 ft listings that state a type, the two biggest groups are cruisers (136 listings, averaging a model year of 2000) and sailboats (96 listings, averaging 1980). Those are not bargains that everyone else missed. They are boats whose owners got tired of the slip bill.

Run it forward: a 31-foot cruiser bought for $20,000 and kept in a $124-per-foot harbor will cost more in slip fees and winter storage across five years than it cost to buy. The boat is the down payment on the parking.

The shape of the market reinforces the point. Of the 5,920 listings with a stated length, 4,538 — about 77% — are under 26 feet, and only 915, or 15.5%, are 30 feet or longer. That long-boat inventory concentrates in California (213 listings), Florida (156), and Washington (88), all year-round coastal markets. If you are shopping in that range, price the slip in the specific harbor you would use before you price the boat.

The five-year test

Before you make an offer, run this. It takes ten minutes and it changes decisions.

Take the asking price. Add five years of your chosen storage model. Add five years of maintenance, insurance, and fuel. Then compare that total against the same total for a boat one size band smaller.

For a 25-foot boat at $18,500 trailered at home, five years of storage is roughly $750 to $3,000. For a 31-foot boat at $20,000 in a mid-priced seasonal slip, five years of slip fees, tax, and winter storage clears $25,000 and can pass $40,000 on the coast — before a single gallon of fuel or one haul-out for bottom paint.

The 31-footer costs $1,500 more to buy and something like $25,000 more to own. Put both totals in the boat ownership cost calculator, and if the number surprises you, can I afford a boat walks through where the ceiling actually sits. For the full regional detail on each storage type, boat storage cost breaks the ranges down further.

How storage should pick your boat

Four rules that hold almost everywhere:

1. If you have a driveway, no HOA restriction, and a tow vehicle, shop under 26 feet with a trailer. It is the cheapest ownership structure available in boating, and it is not close. It also lets you follow the fish, the weather, and the cheaper market across state lines.
2. If you are coastal and will use the boat 20-plus times a season, dry stack under 30 feet. You buy back most of the convenience of a slip, you skip bottom paint permanently, and the boat ages out of the sun and water.
3. Take a slip only when the boat genuinely cannot leave the water, or when leaving it rigged is the point. Liveaboards, big cruisers, sailboats with fixed keels, and anyone whose boating is “walk down the dock after work” — that is what a slip is for, and it is worth paying for. Buying a slip-sized boat for a use case a trailer would serve is the most common expensive mistake in this category.
4. Never let a cheap big boat pull you into a slip you did not plan for. A $20,000 32-footer looks like more boat for the money. It is more boat for a much larger recurring bill, and the resale market will treat it the same way when you sell.

What to do next

Before you send an offer on any boat:

• Get the beam, not just the length, and compare it to the 102-inch limit.
• Ask the marina how they measure length overall and get a per-foot quote in writing for your actual boat.
• Ask whether there is a waitlist for your length, and how long it is.
• Ask the dry stack for the height and weight caps and the in-and-out policy in writing.
• Confirm your tow rating against boat plus engine plus trailer plus full fuel plus gear.
• Check your HOA covenant and local ordinance before you count on driveway storage.
• Add five years of storage to the asking price and compare against a boat one band smaller.
• Price bottom paint if the boat will be wet, and treat it as a recurring cost, not a one-time one.

Do that math before you fall for a specific hull, and the storage question answers the size question for you.

Not sure whether a specific listing is priced fairly for what it will cost to keep? Paste the listing and get an instant verdict — you will get a Buy Score, the red flags, and fair-price context before you call the seller.