Pool Pump Replacement
A new pool pump costs $900–$2,600 installed. Since 2021 most replacements must be variable-speed — which costs more upfront and typically halves the electricity your pool uses.
Variable speed is no longer optional
US Department of Energy efficiency standards that took effect in 2021 mean most replacement pool pumps above a low horsepower threshold must be variable-speed. Single-speed pumps remain legal to own and run — you simply cannot buy a new one in most sizes.
This is genuinely good news financially, even though it raises the upfront cost. Pump power draw falls steeply as speed falls, so running longer at a lower speed both filters better and uses substantially less electricity. Most households replacing an old single-speed pump see pool pumping costs drop by half or more.
What it costs
| Pump type | Unit | Installed | Notes |
|---|---|---|---|
| Variable-speed, standard residential | $700–$1,400 | $900–$1,900 | The default replacement today |
| Variable-speed, high performance | $1,200–$2,000 | $1,500–$2,600 | Larger pools, spas, water features |
| Single-speed (where still permitted) | $300–$600 | $500–$900 | Only in small sizes or exempt applications |
| Motor only, existing wet end | $300–$700 | $450–$1,000 | Where the wet end is sound and compatible |
| Plumbing reconfiguration | — | $200–$800 | If the new pump does not match the existing footprint |
| Electrical work | — | $200–$900 | Where the circuit or bonding needs updating |
How pumps are sized
Bigger is not better, and oversizing is the most common mistake in pool equipment. An oversized pump costs more to run, can exceed the safe flow rate of your filter and plumbing, and does not clean the pool any better.
Sizing is driven by your pool volume, the turnover you want, and the flow limits of the plumbing and filter already in place. Variable-speed pumps are more forgiving here, since you can simply run them slower — but the plumbing still sets a ceiling.
- Pool volume. The starting point. The estimator can derive it from your dimensions.
- Turnover target. Most residential pools aim to circulate the full volume once or twice daily.
- Plumbing size. Pipe diameter caps the flow rate you can safely move. Undersized pipe with an oversized pump means noise, wear and poor efficiency.
- Filter capacity. Every filter has a maximum design flow rate. Exceeding it reduces filtration quality and shortens media life.
- Additional loads. Heaters, spa jets, water features and in-floor cleaning systems all change the requirement.
What the running saving is worth
The saving depends on your electricity rate, run hours and pool size, so treat any single figure with suspicion. What is reliable is the direction and rough magnitude: replacing an old single-speed pump with a variable-speed one typically cuts pool pumping electricity by half or more, and pool pumping is often the largest single electrical load in a home with a pool.
That is why the payback period on a variable-speed pump is usually measured in a few years rather than a decade — and why a utility rebate frequently tips it further.
What the job involves
- Isolate and drain. Power off at the breaker, valves closed, pump drained. Half an hour.
- Remove the old pump. Cut the unions or the plumbing, disconnect the electrical.
- Fit the new pump. Mount, re-plumb to match the new footprint, connect and bond electrically.
- Prime and test. Fill, prime, check for leaks and set the speed schedule.
- Programme the schedule. The step that determines whether you actually see the saving. Ask your installer to set and explain it.
What this project needs measured
Measurements are only requested when they change the price of the work you selected. Everything below is collected inside the estimator — you can enter dimensions you already know or measure as you go.
Required
No measurement required
This project is diagnosed from symptoms and equipment details rather than dimensions.
Only if it applies
Pool interior surface area
Resurfacing and finish work are priced by the square footage of the interior shell.
What the estimator will ask you
- Current pump brand, model and horsepower
- Single-speed or variable-speed
- Approximate pool volume, for sizing
- Whether you have a heater, spa or water feature
- Photos of the equipment pad
- Whether the plumbing needs reconfiguring
- Desired timeline
How to read a PoolSavr estimate
- Step 1
Instant estimate
Based on your project selections and general pricing assumptions. Useful for deciding whether a project is realistic.
- Step 2
Measured estimate
Uses your pool, spa, or deck dimensions to price the work against the areas actually being resurfaced, tiled, or replaced.
- Step 3
Contractor proposal
Prepared by a licensed professional after inspecting the site. This is the only number that becomes a contract.
PoolSavr is an estimating and matching platform. We do not perform pool work ourselves — licensed local professionals do. Contractors pay PoolSavr for qualified project leads, which is how the estimating tools stay free for homeowners. A PoolSavr estimate is a planning range, never a guaranteed quote — read thefull estimate disclaimer.
Frequently asked questions
- How much does a new pool pump cost installed?
- Typically $900–$1,900 for a standard residential variable-speed pump installed, and $1,500–$2,600 for a high-performance unit. Plumbing reconfiguration and electrical work can add $200–$900 each. Utility rebates often reduce the net cost by $100–$500.
- Do I have to buy a variable-speed pump?
- In most sizes, yes. US efficiency standards since 2021 mean most replacement pool pumps above a low horsepower threshold must be variable-speed. Existing single-speed pumps are legal to keep running — you just cannot buy a new one in most sizes.
- Will a variable-speed pump really save money?
- Usually a substantial amount. Power draw falls steeply as pump speed falls, so running longer at low speed both filters better and uses far less electricity. Most households replacing an old single-speed pump cut pool pumping electricity by half or more.
- What size pool pump do I need?
- It depends on pool volume, your target turnover, and the flow limits of your existing plumbing and filter. Oversizing is the common mistake — it costs more to run, stresses the plumbing and does not clean better. Let the installer size it against your actual system.
- Can I replace just the motor?
- Sometimes, where the wet end is sound and a compatible motor is available, at $450–$1,000 installed. On an old single-speed pump it is usually a false economy, since you keep an inefficient unit and cannot convert it to variable-speed.
Ready to see what your project costs?
Start with the work you are considering. You will get a preliminary range before anyone asks for your phone number, and you decide whether to request a contractor review at the end.