How Much Does a Standby Generator Really Cost? The Full Breakdown
Last updated: March 2026
A Generac 22kW generator — the most popular home standby in America — lists for $6,119 on the Generac website. That is not what you will pay.
By the time that generator is sitting on a concrete pad in your yard, wired into your panel through an automatic transfer switch, with a gas line connected and a permit sticker on it, you're looking at $12,000 to $17,000. The unit is less than half the total cost.
Every generator manufacturer and retailer shows you the unit price. This article shows you everything else.
What a Standby Generator Actually Costs (Installed)
These are total installed prices: the unit, transfer switch, labor, concrete pad, gas line, permits, and inspection. The number you'll actually write a check for.
| Generator Size | Unit Price | Total Installed |
|---|---|---|
| 10 kW | $2,000–$3,500 | $5,000–$8,000 |
| 14 kW | $4,000–$5,500 | $8,000–$12,000 |
| 18–20 kW | $4,500–$7,000 | $10,000–$18,000 |
| 22–24 kW | $5,000–$7,000 | $12,000–$20,000 |
| 26–28 kW | $7,000–$10,000 | $15,000–$25,000 |
The national average for an 18 kW system (enough for a typical 2,000 sq ft home with central AC) is roughly $15,000 fully installed.
Not sure what size you need? Figure out your generator size first →
Where Every Dollar Goes
That gap between the sticker price and the installed price is made up of six components. Each one adds to the total, and some of them surprise people.
The Generator Unit: $2,000 to $10,000
This is the number you see on manufacturer websites and at Home Depot. It varies by brand and size.
At the same kilowatt rating, Generac tends to be the cheapest (market leader economics: they sell the most, so they can price the lowest). Kohler runs about 15–20% higher for comparable units. Cummins and Briggs & Stratton land in between. Champion undercuts nearly everyone.
A few real examples at the most popular sizes:
| 22 kW Models | Unit Price |
|---|---|
| Generac Guardian 22kW | $6,119 |
| Briggs & Stratton PowerProtect 22kW | $6,037 |
| Champion 22kW aXis | $6,299 |
| Kohler 20RCA (closest size) | $5,699 |
| Cummins RS20A (closest size) | $5,804 |
The unit price differences between brands are smaller than you'd think: $300 to $500 at the same size. The real cost difference comes from what's included (Generac often bundles the transfer switch, Kohler doesn't) and the installation itself.
Automatic Transfer Switch: $400 to $2,500 (installed)
The transfer switch is what makes the whole thing automatic. When utility power drops, the transfer switch detects it, signals the generator to start, and switches your home's power source: all in about 10 to 20 seconds, without you doing anything.
It also prevents backfeed: generator power flowing backward through your panel into the utility lines. Without a transfer switch, that can kill lineworkers. It's required by code.
Pricing depends on the amperage:
- 100-amp ATS: $400–$900 for the unit, $600–$1,500 installed
- 200-amp ATS (whole house): $680–$1,500 for the unit, $1,200–$2,500 installed
Many Generac models bundle the transfer switch: look for model numbers ending in "20," "30," or "40." Kohler and Cummins sell theirs separately. Factor this in when comparing unit prices. A $6,119 Generac that includes the ATS is actually cheaper than a $5,699 Kohler plus a $789 Kohler RXT switch.
Installation Labor: $3,000 to $7,000+
This is the largest single cost after the unit itself. Installation involves a licensed electrician (for wiring and the transfer switch), a licensed plumber or gas tech (for the gas line), and general labor (for the concrete pad and placing a 400-to-600-pound generator on it).
Standard installs — sub-20 kW, easy panel access, short gas run — come in at $1,500 to $5,000 in labor. Complex installs — 20 kW+, long electrical or gas runs, panel upgrades, tight access — can hit $5,000 to $12,000.
Most dealers offer turnkey installation where they handle everything: the electrician, the plumber, the pad, the permits, the inspection. One point of contact, one price. This is the path most homeowners take, and it's worth it.
Concrete Pad: $500 to $1,500
Your generator needs a level, permanent foundation. A typical pad is about 3 feet by 6 feet. Poured concrete is the standard, running $50 to $75 per square foot.
Budget option: a pre-cast concrete pad or compacted gravel base at $100 to $300. Some jurisdictions and manufacturers require poured concrete. California requires seismic reinforcement, which pushes pad costs to $600 to $1,500.
Gas Line: $400 to $1,500+
A licensed plumber runs a gas line from your natural gas meter (or propane tank) to the generator. The cost is driven by distance: $15 to $50 per linear foot.
Here's a tip most installers won't volunteer: place the generator near the gas meter, not near the electrical panel. Gas piping costs more per foot than electrical wire. A 50-foot gas run at $30/foot is $1,500. A 50-foot electrical run is significantly cheaper. If you have a choice of placement, shorter gas line wins.
If your gas meter can't supply enough volume for the generator and your home simultaneously, you may need a meter upgrade, roughly $1,000 extra.
Permits: $80 to $450
Virtually every jurisdiction requires permits for a standby generator installation. You'll typically need an electrical permit ($50–$200) and a gas or mechanical permit ($50–$150). Some areas require a separate zoning permit.
Your installer handles all of this: pulling the permits, scheduling inspections, dealing with the paperwork. You don't visit the permit office. In most of the country, $80 to $300 covers everything. California is the outlier at $500 to $2,000 once you factor in plan review and seismic requirements.
Do I need a permit? Full state-by-state guide →
Panel Upgrades (If Needed): $400 to $4,500
This one surprises people. If your electrical panel is old: especially if it's a Federal Pacific, Zinsco, or fuse box; it may need to be replaced before a generator can be connected. A 100-amp to 200-amp panel upgrade runs $1,300 to $2,500. A full panel replacement is $1,200 to $4,500.
Not everyone needs this. A modern 200-amp panel in good condition connects without issue. But if your panel is 30+ years old, budget for the possibility.
This is exactly why we ask for a photo of your electrical panel when you request quotes; it helps installers spot this before they show up, so the quote is accurate from the start.
How Location Affects Your Price
Where you live creates a 15 to 25% swing in total installed cost. Same generator, same installer skill level: different price.
| Region | 20–22 kW Installed | vs. National Average |
|---|---|---|
| Midwest | $8,500–$14,000 | 5–15% below average |
| Southeast / South | $9,000–$15,000 | 5–10% below average |
| Northeast | $12,000–$20,000+ | 10–20% above average |
| West Coast | $13,000–$22,000+ | 10–25% above average |
The Midwest is consistently the cheapest market: lower labor rates and faster permitting. The West Coast is the most expensive, driven by California's permitting, seismic requirements, and higher labor costs. Urban installs run 20–30% more than rural in any region.
Five Things That Move Your Price the Most
If you're trying to predict where you'll land in those ranges, these are the variables that matter.
1. Distance from gas meter to generator. The single biggest swing factor. Every foot of gas line is $15 to $50. Place the generator close to the meter.
2. Electrical panel age. A modern 200-amp panel connects cleanly. A 40-year-old fuse box needs a full replacement first: add $1,200 to $4,500.
3. Local permits. $80 in rural Tennessee. $2,000 in parts of California. You can't control this, but you should know it before you're surprised.
4. Site accessibility. Narrow side yard, steep slope, or limited access for equipment delivery can add $500 to $2,000 or require a crane ($1,200–$2,500/day: rare for residential).
5. Time of year. Summer and winter are peak demand seasons; the same people who lose power are the ones calling for installations. Spring and fall are 10–20% cheaper and have shorter lead times. If your install isn't urgent, schedule for the off-season.
The Ongoing Costs (After Installation)
The purchase and installation are the big upfront hit. After that, you're looking at roughly $75 to $100 per month in ongoing costs: fuel, maintenance, and occasional part replacements.
| Expense | Annual Cost |
|---|---|
| Professional maintenance (1 visit/year) | $200–$600 |
| Battery replacement (every 2–3 years) | ~$200 averaged per year |
| Fuel for weekly exercise runs (natural gas) | $48–$60 |
| Fuel during actual outages (est. 50 hrs/year, NG) | $94–$183 |
Annual professional maintenance is not optional: every manufacturer requires it to keep your warranty valid. Skip it and you void the warranty AND increase your failure risk by 63% during the outages you bought the generator for.
Total Cost of Ownership: What a Generator Really Costs Over 10 and 20 Years
Using a 22 kW system as the example; the most common size sold in the US.
| Category | 10-Year Cost | 20-Year Cost |
|---|---|---|
| Upfront (unit + ATS + install + permits) | $16,200 | $16,200 |
| Fuel (50 hrs/year on natural gas) | $1,375 | $2,750 |
| Maintenance ($450/year average) | $4,500 | $9,000 |
| Battery replacements | $400 | $800 |
| Total | $22,475 | ~$28,750 |
| Monthly equivalent | ~$187/mo | ~$120/mo |
Over 20 years, a standby generator costs about $120 per month. That's less than most gym memberships, less than a single streaming bundle, and less than one night in a hotel during a power outage.
How to Get the Best Price
Get at least three quotes.
This is non-negotiable. Pricing varies 20 to 30% between installers for the same equipment and scope of work. Three quotes give you a realistic range and negotiating leverage.
Schedule for spring or fall.
Summer and winter are when people lose power and panic-buy generators. Installers are backlogged, equipment is on allocation, and prices spike 10–20%. Spring and fall are the off-season. Better pricing, faster scheduling, more attention from your installer.
Ask what's included: and what isn't.
A "turnkey" quote should cover the generator, transfer switch, concrete pad, gas line, electrical work, permits, and inspection. If any of those are listed as extras, you're comparing apples to oranges with other quotes.
Consider buying equipment separately.
Some homeowners buy the generator unit online (Home Depot, Lowe's, or a dealer) and hire a contractor for installation only. This can save 15–25% on the total project. The tradeoff: some manufacturers won't honor the full warranty if an authorized dealer didn't sell AND install the unit. Ask the manufacturer before going this route.
Group purchase with neighbors.
If multiple homes on your block want generators, approach an installer as a group. Contractors will often discount 5–10% for multiple installs in the same neighborhood: less drive time, efficient scheduling.
Financing Options
Most homeowners pay cash or use a home equity line. But financing is available if you'd rather spread the cost.
Generac offers financing through Synchrony Financial: 18-month promotional period, no down payment. After the promo: 26.99% APR. There's a $29 activation fee. It's fine if you pay it off in 18 months. If you don't, that interest rate is brutal.
Third-party lenders like PowerPay, GreenSky, and CurrencyFinance specialize in home improvement financing and offer generator-specific loans. Typical terms: no down payment, 12 to 18 month promo periods, then standard rates.
Briggs & Stratton and Cummins offer financing through their dealer networks: terms vary by dealer.
Tax Breaks and Rebates
The short answer: there aren't many.
No federal tax credit exists for natural gas or propane standby generators. They're not classified as renewable energy under the Inflation Reduction Act. Solar-plus-battery systems qualify for the 30% Residential Clean Energy Credit, but the generator portion does not.
Medical expense deduction: If a doctor prescribes the generator as medically necessary: for example, to power life-support equipment like an oxygen concentrator; the cost may be deductible as a medical expense on Schedule A. You need documentation.
State and local rebates exist in some storm-prone areas. A few utilities offer incentives for standby systems. These are inconsistent and change frequently: ask your installer what's available in your area.
Is It Worth It?
This is the math most people run in their head but never see on paper.
A standby generator costs $7,000 to $20,000 installed. That sounds like a lot until you look at what a single major outage costs without one.
| What happens without a generator | Cost |
|---|---|
| Frozen pipes burst (winter outage, 5+ days) | $25,000–$30,000 |
| Sump pump fails, basement floods | $4,000–$8,000 |
| Food spoilage (full fridge + freezer) | $250–$500 |
| Hotel for family of 4, 5 nights | $870–$1,070 |
| Lost remote work income (2 days) | $466 |
One bad winter storm with a burst pipe can wipe out your savings faster than you'd believe. We break down the full damage numbers in our outage cost guide, but the short version: a single pipe event routinely exceeds the total cost of the generator that would have prevented it.
Add the insurance discount (2–5% on homeowners premium, roughly $75–$150 per year) and the resale value (3–5% increase, or $12,000–$20,000 on a $400,000 home), and the total financial picture over 20 years actually favors the generator in any area with regular outages.
Full breakdown: what does a power outage actually cost you? →
Get Real Pricing for Your Home
Every home is different. The best way to know what you'll pay is to get actual quotes from installers who can assess your specific situation: your panel, your gas line distance, your local permit costs.
Get Free Quotes → — we connect you with licensed installers in your area. No obligation.