Well Pressure Tank Replacement Cost in 2026: Prices by Size & Type
Replacing a well pressure tank costs $300–$700 for most homeowners, averaging $500 (Angi, updated Sep 18, 2026). HomeGuide's July 2025 figures run higher, at $800–$1,500 installed and a $1,000 average. Tanks cost about $10–$15 per gallon, so size drives the price, and a 120-gallon or all-metal diaphragm tank can reach $2,500.
A well pressure tank replacement costs $300 to $700, averaging $500 (Angi, updated Sep 18, 2026). Angi prices the tank at roughly $10–$15 per gallon of capacity, plus $125–$200 for a plumber or handyperson to swap it. HomeGuide's July 2025 guide prices the same job at $800 to $1,500 installed, averaging $1,000, and its size table runs from $450 for a small 20-gallon tank to $3,000+ for a 120-gallon one.
Size moves the price most, followed by tank type and labor. Diaphragm tanks cost more than bladder tanks. Single-compartment tanks cost the least but waterlog more easily. And a tank in a crawl space or buried outside costs more to reach than one in a basement.
Well Drilling Pros connects you with independent local well and pump pros. The pressure tank size calculator below works out how much drawdown your pump needs and which nominal tank size delivers it, so you can price the right tank before you call. The figures are national ranges from Angi and HomeGuide, listed at the end of this guide.
Typical national range
$300 – $700
Average $500 (Angi, Sep 18, 2026). HomeGuide (Jul 25, 2025): $800–$1,500 installed, average $1,000.
Cost breakdown
| Item | Typical range | Notes |
|---|---|---|
| Pressure tank replacement (typical) | $300 – $700 | Average $500, tank plus labor (Angi, Sep 18, 2026). |
| Pressure tank replacement (HomeGuide) | $800 – $1,500 | Average $1,000; minimum $450, maximum $3,000+ (HomeGuide, Jul 25, 2025). |
| Diaphragm tank | $200 – $2,500 | Usually $200–$500; 120-gallon or all-metal models reach $2,500 (Angi). |
| Bladder tank | $150 – $1,500 | Usually $150–$400; large sizes reach $1,500 (Angi). |
| One-compartment (air-over-water) tank | $100 – $300 | Cheapest type, but more prone to waterlogging (Angi). |
| Tank price per gallon | $10 – $15 | Per gallon of capacity, by brand and type (Angi). |
| Labor to swap the tank | $125 – $200 | Handyperson or plumber (Angi). HomeGuide: $250–$500+, at $75–$150 an hour. |
| 20–29 gallon tank, installed | $450 – $1,000 | Tank alone $200–$500 (HomeGuide). |
| 30–39 gallon tank, installed | $550 – $1,350 | Tank alone $300–$850 (HomeGuide). |
| 40–59 gallon tank, installed | $600 – $1,600 | Tank alone $350–$1,100 (HomeGuide). |
| 60–79 gallon tank, installed | $750 – $1,800 | Tank alone $500–$1,300 (HomeGuide). |
| 80–99 gallon tank, installed | $850 – $2,300 | Tank alone $600–$1,800 (HomeGuide). |
| 100–119 gallon tank, installed | $1,100 – $2,500 | Tank alone $850–$2,000 (HomeGuide). |
| 120–139 gallon tank, installed | $1,150 – $3,000 | Tank alone $900–$2,500+; installed tops out at $3,000+ (HomeGuide). |
| Pressure switch (if replaced too) | $120 – $175 | Angi well pump repair guide (Sep 15, 2026). |
| Pressure gauge (if replaced too) | $100 – $175 | Angi well pump repair guide (Sep 15, 2026). |
| Well pump replacement (if the pump also failed) | $973 – $2,822 | Average $1,897 installed (Angi, Aug 31, 2026). |
What changes the price
Providers quote their own work — these are the factors that consistently move the number.
- Tank size: Angi prices tanks at $10–$15 per gallon, and HomeGuide's installed prices climb from $450–$1,000 for a 20–29 gallon tank to $1,150–$3,000+ for 120–139 gallons.
- Tank type: Angi puts a typical diaphragm tank at $200–$500, a bladder tank at $150–$400 and a one-compartment tank at $100–$300. Large or all-metal diaphragm tanks reach $2,500.
- Labor and access: Angi's labor figure is $125–$200, and HomeGuide's is $250–$500+. HomeGuide notes that crawl spaces and buried tanks cost more than a basement or utility room.
- Other worn parts: a pressure switch adds $120–$175 and a gauge $100–$175 (Angi, Sep 15, 2026). If short cycling has already killed the pump, a new one averages $1,897 installed (Angi, Aug 31, 2026).
- Where you live: Angi says labor, the tank and hardware all run toward the high end in areas with a higher cost of living.
- Sizing to the pump: the tank has to give the pump at least a minute of run time per cycle. A tank that's too small makes the pump short-cycle, the leading cause of early pump failure, so the cheapest tank isn't always the cheapest choice.
How much does a pressure tank cost by size?
HomeGuide (Jul 25, 2025) prices tanks by capacity. A 20–29 gallon tank costs $200–$500 alone or $450–$1,000 installed, a 40–59 gallon tank $350–$1,100 alone or $600–$1,600 installed, and a 120–139 gallon tank $900–$2,500+ alone or $1,150–$3,000+ installed. Angi's shortcut is $10–$15 per gallon for the tank, with sizes running from 20 to 120 gallons.
The calculator above picks the size. A 10 GPM pump on a 40/60 switch, running 1.5 minutes per cycle, needs 15 gallons of drawdown, which takes an 85-gallon nominal tank. HomeGuide prices an 80–99 gallon tank at $600–$1,800 alone, or $850–$2,300 installed. ESTIMATE: at Angi's $10–$15 per gallon, an 85-gallon tank costs $850–$1,275 (85 × $10 and 85 × $15), or $975–$1,475 with Angi's $125–$200 labor.
Smaller systems cost less. A 10 GPM pump with a 1-minute run needs 10 gallons of drawdown and a 50-gallon tank, which sits in HomeGuide's 40–59 gallon band at $600–$1,600 installed.
Water pressure tank prices by type
Diaphragm tanks cost $200 to $500 (Angi, Sep 18, 2026). A welded-in membrane separates the water from the compressed air, so air can't escape, which is why Angi calls them one of the more common and efficient types. A 120-gallon model, or an upgrade from vinyl to all-metal construction, can reach $2,500.
Bladder tanks cost $150 to $400, rising to $1,500 for large sizes (Angi). The bladder is screwed in rather than welded, so it's easier to replace but can lose air over time. HomeGuide notes bladder tanks are easier to service than diaphragm tanks.
One-compartment tanks cost $100 to $300 (Angi). HomeGuide calls them air-over-water tanks: water sits directly on the compressed air, and they need more maintenance because the air slowly dissolves into the water. That's what waterlogs them. Angi recommends a two-compartment tank.
Why do pressure tank replacement cost estimates differ so much?
Angi puts the typical job at $300–$700 (Sep 18, 2026) and HomeGuide at $800–$1,500 (Jul 25, 2025). Labor accounts for some of the gap: Angi uses $125–$200 for a handyperson or plumber, and HomeGuide uses $250–$500+ at $75–$150 an hour. HomeGuide's table also covers tanks up to 139 gallons.
We lead with Angi's range because it's the more recently updated source, and it's the figure our pressure tank calculator and pump replacement guide use. Budget toward HomeGuide's range for a large tank, a tank in a crawl space or buried outside, or a job that also replaces the pressure switch and fittings.
Signs your well pressure tank needs replacing
HomeGuide lists four warning signs: pressure that swings or drops while water is running, a pump that short-cycles on and off with light use, a waterlogged tank that sounds solid rather than hollow when you tap it, and rust or corrosion on the outside. Angi's pump guide (Aug 31, 2026) gives a quick test: if the pump kicks on as soon as you open a tap, the tank is probably bad.
HomeGuide says pressure tanks last 10 to 15 years, less with hard or mineral-heavy water. A waterlogged tank should be dealt with promptly, because every short cycle is a pump start, and starts are what wear out the pump's motor.
How much does it cost to replace a well pump and pressure tank?
ESTIMATE: replacing both typically totals $1,273–$3,522 (Angi's pump replacement range of $973–$2,822, Aug 31, 2026, plus Angi's $300–$700 tank range, added low to low and high to high). Doing both in one visit means one service call, so ask for a combined quote.
It's worth checking the pump whenever the tank fails. Angi notes that when a system uses a combination pump and tank, replacing just one part isn't cost-effective, and a pump that has been short-cycling on a waterlogged tank may already be worn. If the pump runs normally once the new tank is in, the tank alone was the fix. The repair-or-replace quiz at /tools/well-pump-repair-or-replace can help with that call.
Can I replace a well pressure tank myself?
You can, but Angi advises against it unless you have real experience with wells and tanks: tanks are heavy, and installation has to meet local plumbing and well codes. Doing it yourself saves the $125–$200 labor charge (Angi), or $250–$500+ by HomeGuide's figures.
If you do, set the tank's air precharge about 2 PSI below the pressure switch's cut-on point before you fill it, and size the tank to your pump with the calculator rather than copying the old tank's label. An undersized tank brings back the short cycling you replaced it to fix.
How we built these numbers
The short version. Every price on this page comes from a published, cited national cost guide. When no source publishes a figure we need, we make an estimate, label it as an estimate, and show how we got it. These are planning ranges, not quotes. This page is published by Cornelia Cove LLC.
How each range was built:
Headline range ($300–$700) and average ($500). Copied as published from Angi's well pressure tank replacement cost guide (updated Sep 18, 2026). The same figures appear in our pressure tank size calculator and well pump replacement guide.
Prices by tank type ($100–$2,500), price per gallon ($10–$15) and labor ($125–$200). As published by Angi (Sep 18, 2026).
HomeGuide range ($800–$1,500, average $1,000), prices by size, and labor ($250–$500+). As published by HomeGuide (Jul 25, 2025). We show it beside Angi's figure because the two differ by a lot.
Pressure switch ($120–$175) and gauge ($100–$175). As published by Angi's well pump repair cost guide (Sep 15, 2026). Pump replacement ($973–$2,822, average $1,897). As published by Angi's well pump replacement cost guide (Aug 31, 2026).
Date window. Every source was published or updated between Jul 25, 2025 and Sep 18, 2026, and all were read on Oct 18, 2026.
Estimates on this page (labeled where they appear): An 85-gallon tank ($850–$1,275, or $975–$1,475 installed) = 85 gallons × Angi's $10–$15 per gallon, plus Angi's $125–$200 labor. Pump + pressure tank in one visit ($1,273–$3,522) = Angi replacement range + Angi tank range, added low to low and high to high. Tank sizes in the examples come from our calculator's drawdown math, not from a cost source.
How we choose figures: As published. We copy a source's range exactly. We don't round, blend or adjust for inflation. When sources disagree by a lot, we show both. Same numbers everywhere. This page, the embedded calculator and our pump guides use the same figures.
Limits. These ranges are national, not local, and prices in your county can fall outside them. They aren't quotes, because we don't survey contractors.
Reusing this data. The cost tables on this page are licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). You can reuse them with attribution and a link back to this page. Suggested credit: Source: Well Drilling Pros, Well Pressure Tank Replacement Cost (Cornelia Cove LLC), https://welldrillingpros.com/cost/well-pressure-tank-replacement-cost
Corrections. Spot a wrong or outdated figure? Email partners@corneliacove.com. We check reported errors against the cited source, then update the page and its review date.
Last updated: October 2026. We refresh these tables at least once a year.
Frequently Asked Questions
How much does it cost to replace a well pressure tank?
Most homeowners pay $300–$700, averaging $500 (Angi, Sep 2026). HomeGuide's July 2025 range is higher, $800–$1,500 installed, and large 120-gallon tanks can reach $3,000+ installed.
How much is a well pressure tank without installation?
Angi puts the tank alone at $100–$300 for a one-compartment tank, $150–$400 for a typical bladder tank and $200–$500 for a typical diaphragm tank, or about $10–$15 per gallon. HomeGuide's tank-only prices run from $200–$500 for 20–29 gallons to $900–$2,500+ for 120–139 gallons.
How long does a well pressure tank last?
HomeGuide says 10 to 15 years on average. Hard or mineral-heavy water shortens that, and checking the air charge and looking for leaks helps a tank last longer.
What size pressure tank do I need?
Multiply your pump's GPM by a run time of 1–2 minutes to get the drawdown, then divide by the usable share for your switch setting (about 0.27 at 40/60). A 10 GPM pump on a 1.5-minute run needs an 85-gallon tank. The calculator on this page does the math.
Should I replace the pump when I replace the pressure tank?
Only if the pump is worn or old. A waterlogged tank makes the pump short-cycle, so have the installer check it. ESTIMATE: doing both in one visit costs about $1,273–$3,522, from Angi's pump and tank ranges.
Is a bigger pressure tank worth the extra cost?
Usually. Angi notes a larger tank lowers the cost per gallon and may last longer between replacements, and a bigger tank means fewer pump starts. When you're between sizes, go up.
Estimates only — independent local providers quote their own pricing. Data last reviewed 2026-10.
Sources
- Angi — Well Pressure Tank Replacement Cost (Sep 18, 2026) (third-party estimate)
- HomeGuide — Cost to Replace a Well Pressure Tank (Jul 25, 2025) (third-party estimate)
- Angi — Well Pump Repair Cost (Sep 15, 2026) (third-party estimate)
- Angi — Well Pump Replacement Cost (Aug 31, 2026) (third-party estimate)
Related services
Free tools for this job
Well Pump: Repair or Replace? Decision Quiz
Pump acting up? Answer three questions — type, age, and symptom — for an honest repair-vs-replace verdict with real 2026 costs.
Use the free tool →No Water From Your Well? Diagnostic Wizard
Suddenly no water in the house? Answer a few questions to find out if it's the breaker, the pressure switch, the tank, the pump — or the well itself.
Use the free tool →Well Pump Size Calculator
Find what size well pump you need — GPM demand, total dynamic head, and a horsepower recommendation from four quick inputs.
Use the free tool →Counties We Serve
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