Pools
Hot tub installation cost
Installing a standard hot tub costs about $2,673 beyond the tub: a gravel pad, a 50 A circuit with its GFCI disconnect, delivery and steps — about $11,673 all in. A plug-and-play tub is about $6,664 because it only needs a 20 A outlet; a swim spa on a slab, $33,041. Filled, a hot tub weighs more than twice what a deck is designed for.
Written and edited by Pablo Ruiz Quintero
Last reviewed 2026-09-30 · Nothing you type leaves your browser
Hot tub installation cost calculator
The tub, what it sits on, and the power
Installing a hot tub is three jobs besides the tub: a base that carries it full, a circuit that feeds it, and getting it there.
The usual hot tub: acrylic shell, insulated cabinet, a 4 kW heater and two pumps on a 50 A circuit.
Compacted base rock in a frame, a foot bigger all round — the shed page's pad. Fine for most hot tubs; not for a swim spa.
The cable run.
Trenched across the yard.
A 4 ft path reaches the base.
With start-up chemicals.
Sets what it costs to keep hot.
Used only to pick a regional labour rate. It stays in your browser.
Standard, 240 V, 5–6 seats, installed
$11,673
$9,000 tub + $2,673 installation · about $47 a month
Installation alone: $2,673
The base, the circuit, delivery and the extras — what a dealer’s price usually leaves out.
Full, with people in it
4,619 lb · 94 lb/ft²
A deck is designed for 40 lb a square foot. A filled hot tub is 2.4 times that, which is why it goes on concrete, compacted gravel, or a deck reinforced for it.
Every kind of hot tub
On a new gravel pad, 40 ft from the panel.
What it costs to put in
- Standard, 240 V, 5–6 seats
The usual hot tub: acrylic shell, insulated cabinet, a 4 kW heater and two pumps on a 50 A circuit.$9,000 - Delivery and set-up
Dealer delivery on a dolly or sled, set on the base, filled and started up.$400 - New gravel pad
Compacted base rock in a frame, a foot bigger all round — the shed page's pad. Fine for most hot tubs; not for a swim spa.$513 - 50 A, 240 V circuit and spa disconnect
40 ft of 6-gauge copper from the panel, a GFCI spa disconnect panel within sight of the tub and at least 5 ft from it.$1,060 - Trench, 25 ft
The buried part of the run, in conduit at the code's depth.$250 - Steps, cover lifter, chemicals
Steps, a cover lifter and the start-up chemicals.$450
What it costs
National average. A standard, 240 v, 5–6 seats hot tub on new gravel pad, wired and started up. Not included: a gazebo or privacy screen, landscaping, a panel upgrade if the panel is full.
The slab and the gravel pad are priced as on the shed page; the circuit as on the outlet page; the wire gauge, on the wire size calculator.
Worth knowing
- Filled, with 6 people in it, it weighs about 4,620 lb — 94 lb a square foot over its 7 × 7 ft footprint, against the 40 psf a deck is designed for.
- A 50 A, 240 V circuit in 6-gauge copper runs from the panel to a GFCI spa disconnect within sight of the tub and at least 5 ft from it — $1,060 for 40 ft, plus $250 to trench 25 ft of it. The panel needs two free spaces and the capacity; if not, the job starts with a panel upgrade.
- Delivery needs a clear path about 4 ft wide from the street to the base — gates, steps and tight side yards are measured before the day. Where there is none, a crane lifts it over the house (about $900).
- Kept at 102°F under its cover in climate zone 5, it uses about 276 kWh a month — $47 at $0.17 a kWh, from the standby limit a compliant spa must meet plus a few soaks a week. A worn cover is the usual reason the bill is higher.
On this page — 5 sections
Three jobs besides the tub
The short version
- Installation: $2,673 beyond a standard tub.
- All in: $11,673 for a 5–6 seat 240 V tub.
- Plug-and-play: $6,664 — cheaper to wire.
- About $47 a month to keep hot.
A dealer’s price is usually the tub. Putting it in is three more jobs: a base that carries it full, a circuit that feeds it, and getting it to that base. The base and the circuit are the parts that vary — an existing slab costs nothing, a new one about $999; a panel next to the patio costs far less to wire than one on the far side of the house.
| Installed | Installation alone | |
|---|---|---|
| Inflatable | $700 | Plugs in |
| Plug-and-play, 120 V | $6,664 | $2,164 |
| Standard, 240 V | $11,673 | $2,673 |
| Large, 240 V | $17,740 | $2,740 |
| Swim spa, slab and crane | $33,041 | $5,041 |
$2,673
Installation
Standard tub, gravel pad
$1,060
Circuit
50 A, 40 ft
94 psf
Filled
Deck design: 40
$47
A month
Zone 5
MaterialsEstimator, Hot tub and swim spa price survey · checked 2026-09-30
What it sits on
| Standard tub, all in | Base alone | |
|---|---|---|
| Existing slab | $11,160 | Already there |
| Gravel pad | $11,673 | $513 |
| New concrete slab | $12,159 | $999 |
| Reinforced deck | $12,660 | $1,500 |
A filled hot tub with people in it is about 94 lb a square foot — more than twice what a deck is designed for. On the ground it needs to be level and firm: an existing concrete slab at least 4 in thick, a compacted gravel pad in a frame, or a new slab. On a deck, the framing under the tub is reinforced with beams, posts and footings. A swim spa, at about 10 tons filled, goes on a slab.
International Code Council, IRC Table R301.5 — Minimum uniformly distributed live loads (2021) · checked 2026-09-30
The circuit
A 240 V tub takes a 50 A GFCI-protected circuit in 6-gauge copper, through a spa disconnect within sight of the tub and at least 5 ft from it. The cost is the distance: $1,060 for 40 ft, $2,280 for 100 ft with most of it trenched. A 120 V plug-and-play tub needs a dedicated 20 A GFCI outlet instead. Either way, the panel needs the spaces and the capacity; a full panel turns the job into a panel upgrade.
National Fire Protection Association, NFPA 70, National Electrical Code, Article 680 Parts I and IV — Spas and hot tubs · checked 2026-09-30
Keeping it hot
| kWh a month | A month | |
|---|---|---|
| Hot (zone 2) | 181 | $31 |
| Cool (zone 5) | 276 | $47 |
| Very cold (zone 7) | 328 | $56 |
California caps how much power a covered portable spa may use just to stay hot, by its volume; a compliant 350-gallon tub stays within about a quarter of a kilowatt in the test. The colder the air, the more it uses, and a few soaks a week add the reheating. A cover that has soaked up water and sags is the usual reason a bill doubles.
California Energy Commission, Title 20 Appliance Efficiency Regulations — portable electric spas · checked 2026-09-30
What goes wrong
Before the tub is ordered
- The path measured: gates, steps, side yards.
- The panel checked for two spaces and capacity.
- The base built and level before delivery.
- The disconnect spot at least 5 ft from the tub.
- HOA and setback rules, and a fence if the town wants one.
01Setting it on pavers or thin concrete
They settle unevenly and twist the shell.
Instead — A 4 in slab or a compacted pad.
02Putting it on the deck as built
It is twice the load the deck was designed for.
Instead — Reinforce the framing under it.
03Forgetting the panel
A full panel adds a panel upgrade.
Instead — Look before you buy.
04Keeping the old cover
A waterlogged cover lets the heat out.
Instead — Replace it when it sags.
- 01Pick the spotLevel ground or a slab, within reach of the panel, at least 5 ft from where the disconnect will go.
- 02Check the pathA 4 ft clear path for delivery, or a crane.
- 03Build the baseAn existing 4 in slab, a gravel pad, a new slab, or a deck reinforced for it.
- 04Check the panelTwo free spaces and the capacity for a 50 A circuit.
- 05Run the circuitHeavy copper to a GFCI disconnect, part of it trenched.
- 06Deliver, fill, startSet on the base, filled from a hose, heated for a day.
Why a 50 A hot tub circuit is 6-gauge copper, and when a long run needs heavier.
The wire for it- Plug-and-play hot tub
- A tub that runs on a 120 V, 20 A GFCI outlet. Cheaper to wire; the heater drops out when the jets run hard.
- GFCI spa disconnect
- A small outdoor panel with a GFCI breaker, within sight of the tub and at least 5 ft from it, required by the electrical code.
- Swim spa
- A long hot tub with a current to swim against — typically 1,500 to 2,000 gallons.
- Gunite spa
- A spa built in place from sprayed concrete, like a pool, usually beside one.
- Live load
- The weight a floor or deck is designed to carry beyond its own — 40 lb a square foot for a deck.
- Standby power
- The power a covered spa uses just to stay hot; California caps it for portable electric spas.
- Crane lift
- Lifting a tub over a house or fence where no 4 ft path reaches the base.
Common questions
- How much does hot tub installation cost?
- About $2,673 beyond the tub for a standard 240 V hot tub: $513 for a gravel pad, $1,060 for a 50 A circuit with its GFCI disconnect, $250 to trench part of the run, $400 for delivery and set-up, and $450 for steps, a cover lifter and chemicals. With a $9,000 tub, about $11,673 all in.
- How much does a hot tub cost with installation?
- About $6,664 for a 120 V plug-and-play tub, $11,673 for a standard 5–6 seat tub, $17,740 for a large 7+ seat tub and $33,041 for a swim spa on a slab with a crane. An inflatable tub is about $700 and plugs into an existing outlet.
- How much does it cost to wire a hot tub?
- About $1,060 for a 50 A, 240 V circuit in 6-gauge copper run 40 ft to a GFCI spa disconnect, with the permit, plus $250 to trench 25 ft of it. A 100 ft run with 80 ft buried is about $2,280. A plug-and-play tub needs only a dedicated 20 A GFCI outlet, about $600.
- How much does a concrete pad for a hot tub cost?
- About $999 for a 4 in slab with a thickened edge under a 7 × 7 ft tub, and $513 for a gravel pad. An existing slab at least 4 in thick and level costs nothing.
- Can a deck hold a hot tub?
- Not as built: a filled 6-seat tub with people in it weighs about 4,620 lb — 94 lb a square foot, against the 40 a deck is designed for. Reinforcing the framing under it with beams, posts and footings is about $1,500, sized by someone who can do the arithmetic.
- How much does an in-ground hot tub cost?
- About $26,310 for a built-in gunite spa with its circuit — dug, formed, sprayed, tiled and plumbed like a pool, often beside one and sharing its equipment.
- How much does it cost to run a hot tub?
- About $47 a month for a 350-gallon tub in a cool climate at $0.17 a kWh, from $31 in a hot one to $56 in a very cold one. That is the standby power a compliant covered spa may use plus a few soaks a week; a worn cover raises it.
- How much does hot tub delivery cost?
- About $400 for delivery and set-up where a 4 ft path reaches the base; a crane over the house adds about $900 ($12,573 all in for a standard tub).
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About the author
Pablo Ruiz Quintero — Editor
Editor of MaterialsEstimator. Decides which documents count as a source, what every default value is, and where the line sits between what the reader parses and what the engines compute.
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