Pontoon Boat Buying Guide: Sizes, Tubes, Power & Prices
A pontoon is the easiest boat to buy badly: two boats of the same length can differ by a whole tube of buoyancy, 150 horsepower and $80,000. This pontoon boat buying guide works through the decisions in the order they lock in — two tubes or three, size and layout, horsepower, price, and the used-boat checks. The universal process — listings, sea trials, paperwork, closing — lives in our boat buying guide; what follows is only what changes because the boat floats on tubes. Makers are not ranked here — that is the job of our best pontoon boat brands ranking — and the type's rise is told in our history of pontoon boats.
What Is a Pontoon Boat — and Who It's For
A pontoon boat is a flat deck on two or three sealed aluminum tubes: the tubes give flotation, the deck gives the living room — wraparound lounges, a helm, a Bimini top, and room no V-hull of the same length can match. The type suits social, unhurried boating — family cruising, swimming at anchor, sunset tours, fishing in comfort — on lakes, rivers and sheltered bays. If your shortlist is still split between a pontoon and the wide-bow alternative, settle that first in our pontoon vs deck boat comparison.
Two Tubes vs Tritoon: The Decision That Sets Everything Else
Everything downstream — horsepower ceiling, capacity, ride, price — is set by what is under the deck. As Discover Boating's tritoon-versus-pontoon explainer lays out, mid-size and larger pontoons come with 25-inch tubes, with a 27-inch option that adds capacity and rides better in rough water. A twin-tube boat's horsepower rating is limited by the two-tube design. Add the third, center tube and the same deck carries more power — larger tritoons can be rigged with two or even three outboards — and banks into turns instead of leaning out of them: in Discover Boating's worked example of one 24-foot model, three 25-inch tubes raise capacity from 13 people and 2,315 lbs to 15 and 2,697 lbs, and the power ceiling from 150 to 225 hp.
The rule is your water. A two-tube boat on a small, protected lake is not a compromise — it is the right tool, thousands cheaper. The tritoon earns its premium on big, wind-exposed water, with full crews, or when watersports are the point; our best lake boats guide matches types to lake size.
Pontoon Boat Sizes and Layouts: Cruising, Fishing and Entertaining Floorplans
Pontoon lengths run 16 to 30 feet, with the trailerable 8'6" beam on nearly everything — Bennington's flagships add a 10-foot option for slip-kept boats. Capacity follows size and tubes: 7–9 people on a 16–18 footer, 9–11 on the mainstream 20–22 ft boats, and up to 20 on Bennington's 23–30 ft R Series. Length buys deck space: 24 feet is where a changing room, a sink and a second gate join the rear lounge. Buy for the crew you carry most weekends, not the reunion you host once — and treat the capacity plate by the helm (maximum persons, weight and horsepower; required under federal rules, 33 CFR 183, on monohull boats under 20 feet) as a ceiling to stay under, fuel and coolers included.
Cruising and Entertaining Floorplans
The volume sellers are lounge layouts — quad-lounge and swingback floorplans that ring the deck with seating. Barletta's Cabrio line (20, 22 and 24 ft) and its Lusso flagship build whole ranges on the theme. Walk any layout through: coolers need a home, the Bimini should shade the seats people will use, and gates should meet your dock.
Fishing Floorplans
Fishing pontoons trade lounge space for four corner fishing chairs, a livewell, rod storage and a clear rear deck. Sun Tracker's Bass Buggy line is the archetype — the 16-ft XL Select is the smallest way into the type, advertised from the mid-$20,000s. If fishing is half your use, buy a fish-and-cruise hybrid; if it is a tenth, buy the cruiser and add a pedestal seat.
How Much Horsepower Does a Pontoon Boat Need?
Horsepower on a pontoon is bought for load and water, not for the brochure. Small boats on small or restricted lakes are content with 25–75 hp. The family mainstream runs bigger: Bennington's S-One packages pair 18–22 ft boats with 90–150 hp, Sun Tracker's Party Barge 20 is rated to 115 hp and the 22 to 150 — the sweet spot for a two-tube boat, enough for 20-plus mph with a full crew and a tube in tow.
Tritoons change the math. Lifting strakes let the hull climb onto the water: 150–300 hp is the working band for a 22–25 ft tritoon, Barletta's Lusso 25 is rated to 500 hp, and Bennington's R Line — tritoon standard — runs to 500 hp single or 1,000 hp with twins. A tritoon bought for watersports should carry at least 200 hp; an underpowered one is an expensive two-tube boat hauling a spare tube. And the plate's maximum is final — power is a buying decision, not an upgrade path.
Pontoon Boat Prices: New vs Used Budgets
New pontoons span a wider range than any other family type, because the same 22-foot deck can be a $37,650 two-tube cruiser or a six-figure tritoon:
| Size band | Configuration | Typical capacity | Typical power | New price guide | Where used examples cluster |
|---|---|---|---|---|---|
| 16–18 ft | Two tubes, fishing & compact | 7–9 people | 25–75 hp | From the mid-$20,000s | Plentiful under $25,000 |
| 20–22 ft | Two tubes, family cruising | 9–11 people | 90–150 hp | About $37,000–$65,000 | $15,000–$35,000 at 5–10 years old |
| 22–25 ft | Tritoon, performance & watersports | 12–15 people | 150–300 hp | About $65,000–$150,000 | Newer stock, mostly $40,000+ |
| 25–30 ft | Tritoon, luxury & twin-engine | 14–20 people | 300–1,000 hp | From about $148,000 | Thin, late-model stock |
The anchors: Sun Tracker publishes base prices of $31,695 for the Party Barge 18 DLX and $37,650 for the 20 DLX, and Boating Magazine's certified test of the Party Barge 22 DLX priced it at $41,840 with a 150-hp Mercury, before freight and prep. Tritoon versions of the same family boats list from the mid-$60,000s; at the top, Bennington lists its R Line from $148,304. Five-to-ten-year-old 20–22 ft two-tube boats commonly list at $15,000–$35,000, while used tritoons are newer, thinner and mostly above $40,000. The boats under $50,000 browse captures the heart of the used market; boats under $100,000 adds the late-model tritoons. Budget past the sticker — trailer, tax, registration, safety gear, first service — and get a monthly figure from finance providers first.
What to Check on a Used Pontoon Boat
Start underneath. Tubes should be round, undented and free of pitting corrosion — a creased tube is structural, not cosmetic. Run a hand along the welds where tubes meet the under-deck cross-members: cracked welds are the type's known weak point. Check for water inside the tubes — a slosh as the boat rocks, or one tube sitting visibly lower, means a leaking chamber. Then walk the deck heel-down: soft spots mean water has reached the plywood under the flooring, and re-decking is a major job.
Above deck, price the upholstery honestly — acres of sun-exposed vinyl are the most common big bill on a used pontoon — and check fence panels are straight and gates latch squarely. On the engine, hours, service records and a cold start beat a shiny cowling. The general used-boat spine — paperwork, sea trial, when to survey — is in our used boat inspection checklist; the BoatUS Boat Buyers Guide explains how surveyors grade these findings, and a survey earns its fee on any tritoon or twin-engine boat.
Pontoon Boat Buying Guide Mistakes Buyers Make
Buying two tubes for big water: the saving is real, and so is every rough afternoon after — the tube decision cannot be revisited. Underpowering: a 22-footer with the base engine feels fine with two aboard and labors under a full crew forever after. Shopping by length instead of layout, and ending up with livewells where the cooler should be. Ignoring the trailer math — a 22-ft pontoon tows at over 32 feet and nearly 4,000 lbs packaged, so the tow vehicle is part of the purchase. And forgetting where the boat will live: a 10-foot-beam flagship is a slip boat, not a trailer boat.
How to Shop Pontoon Listings and Close the Deal
Start in the full boat listings and search in the order this guide decided: length band, tube configuration, then power. Read listings for what separates near-identical boats — tube diameter, engine hours, trailer included or not, upholstery in the photos. Sea-trial finalists loaded as you will use them, with real crew weight aboard if the seller allows it: a pontoon's manners change completely between two people and ten. Deposits, title, registration and closing follow the boat buying guide — the pontoon-specific work is done by then.
Pontoon Boat Buying Guide FAQs
Is a tritoon worth the extra money over a two-tube pontoon?
On big or rough water, for crews near capacity, or for watersports, yes — the third tube adds capacity, power headroom and a drier ride. On a small sheltered lake at cruising pace, a two-tube boat does the same job for thousands less.
How much horsepower do I need to pull a tube or a skier?
For tubing behind a family two-tube boat, 115–150 hp is the comfortable band — Sun Tracker's 22-ft Party Barge is rated to exactly 150 hp. Skiers, wakeboarders and heavier crews argue for a tritoon with 200 hp or more, which can use the power instead of plowing.
What size pontoon boat is best for a family of six?
A 20–22 ft model, rated for 9–11 people: six plus gear rides at a sensible load, with room for guests. Drop to 18 ft only if storage demands it; step to 24 ft when entertaining space is the priority.
Do pontoon boats hold their value?
Well-kept mainstream models do — demand is deep and steady, and the table above shows five-to-ten-year-old two-tube boats still commanding $15,000–$35,000. Premium tritoons hold value in dollars but put a bigger sum at risk; neglected upholstery or deck damage erodes value fastest.
Bottom line: this pontoon boat buying guide reduces to three decisions — tubes for your water, size and layout for your crew, power for your load — then a used market that rewards inspection of tubes, welds and deck. Make those calls first, and start the search in the Boat Deals Direct listings.