Generator Repair Cost: $50–$2,500 (Average $270) in 2026
Author: CostGuideHQ Editorial·✓ Fact-checked·Updated July 2026·6 min read·6 sources·US national averages, USD Quick answerQuick answer: Generator repair typically costs $50 to $2,500 depending on the part, with a standard service visit averaging around $270 and running $171 to $396. Portable units are cheap to fix (about $50); whole-house standby systems average $600. Annual maintenance plans run $150 to $650 a year (HomeAdvisor, Angi, HomeGuide).
- ✓Generator repair costs $50 to $2,500 depending on the part, with a typical service visit averaging $270 and running $171 to $396 (HomeAdvisor, Angi).
- ✓Portable generators are cheap to service, averaging about $50, while whole-house standby systems average $600 per repair visit (HomeAdvisor, Angi).
- ✓Transfer switch repairs run $50 to $400, but a full replacement can cost $200 to $2,500 (HomeAdvisor, Angi, HomeGuide).
- ✓An annual maintenance contract costs $150 to $650 a year — often cheaper long-term than paying per repair call (Angi, HomeGuide, Bob Vila, Forbes Home).
How much does generator repair cost?
National average
$270
per repair
Typical range
$50–$2,500
Most projects
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Cost by material / type
| Type | Low | High |
|---|
| transfer switch repair | $50 | $400 |
| transfer switch replacement | $200 | $2,500 |
| carburetor repair | $50 | $500 |
| voltage regulator | $80 | $800 |
| stator and rotor | $250 | $2,500 |
| engine repair | $50 | $2,000 |
| portable generator (repair/maintenance) | $50 | $150 |
| standby/whole-house generator (repair/maintenance) | $200 | $650 |
| annual maintenance contract | $80 | $650 |
What affects the cost?
- Which part failed — the biggest single cost driver, from a $50-$400 transfer switch fix up to a $250-$2,500 stator/rotor replacement (HomeAdvisor, Angi, HomeGuide)
- Portable vs. standby generator — portable units average about $50 to service, while whole-house standby systems average $600 (HomeAdvisor, Angi)
- Minor repair vs. major malfunction — costs span from about $50 for a small fix to $2,500 for a major failure (HomeGuide)
- One-off repair visit vs. annual maintenance contract — a service plan runs $150-$650 a year, while a single repair visit typically averages $171-$396 (Angi, HomeGuide, HomeAdvisor)
- Minimum service call fees many technicians charge before parts or extra labor, typically $150-$300+ (HomeGuide)
- Type of failure — cooling system issues, electrical problems, fuel system failures, belt deterioration, and burned components each need different parts and labor (Forbes Home)
- Battery condition — generators left unused for long stretches are prone to battery failure, and HomeAdvisor recommends replacing the battery about every three years as preventive upkeep
- Local labor rates and how accessible the unit is for a technician
How much does it cost to repair a generator?
Most generator repairs cost $50 to $2,500, depending on what’s actually broken, with the average repair landing around $270 (HomeAdvisor, Angi, Forbes Home). A standard service visit — the kind where a technician diagnoses the problem, makes the fix, and doesn’t need major parts — typically runs $171 to $396 (HomeAdvisor, Angi). Where you land in that range depends heavily on generator type: portable units are cheap to work on, averaging about $50 per repair, while whole-house standby systems average $600 (HomeAdvisor, Angi). If you’re still deciding between a portable unit and a full standby system rather than repairing what you’ve got, our whole house generator cost guide breaks down installation pricing by size and fuel type. Beyond the part itself, many technicians charge a minimum service call fee of $150 to $300 or more just to show up, before any parts or extra labor get added (HomeGuide).
What are the most common generator repairs — and what do they cost?
Transfer switch problems are among the most common calls. Repairing an existing switch runs $50 to $400, but if it needs to be replaced outright, expect $200 to $2,500 (HomeAdvisor, Angi, HomeGuide). Carburetor issues — common on gas-powered units — cost $50 to $500 to fix, and a failing voltage regulator runs $80 to $800 (HomeAdvisor, Angi, HomeGuide). The priciest single-part repairs are stator and rotor work ($250 to $2,500) and engine repairs ($50 to $2,000), since both often mean disassembling major sections of the unit (HomeAdvisor, Angi, HomeGuide). Forbes Home points to five recurring failure categories: cooling system issues like leaking gaskets or coolant hoses, electrical problems, fuel system failures, worn or cracked belts, and heat-damaged components. Battery trouble is common too, though no source in this research publishes a specific battery-replacement price — HomeAdvisor simply recommends replacing the battery about every three years, since a generator that sits unused for long stretches is prone to a dead or failing battery.
How much does annual generator maintenance cost?
An annual maintenance contract typically costs $150 to $650 a year, compared with $80 to $300 for a single basic service visit (Angi, HomeGuide, Bob Vila, Forbes Home). HomeGuide breaks it down further by fuel type: propane and natural gas standby units run $200 to $650 a year, portable generators run $50 to $150, and gas or diesel units can run as high as $1,000. Forbes Home recommends servicing a generator at minimum once a year, and many owners schedule two visits — once before hurricane season and once before winter — so a technician can catch a worn belt or a failing part before an outage, not during one. If a diagnosis turns out to be your home’s electrical panel rather than the generator itself, that’s a separate job; see our electrical panel upgrade cost guide for that pricing.
How to lower your generator repair cost
- Sign up for an annual maintenance plan instead of paying per repair call. At $150-$650 a year versus $171-$396 per one-off visit, a plan often pays for itself if you need even one repair in that window (Angi, HomeGuide, HomeAdvisor).
- Run your generator monthly, even without an outage. HomeGuide notes a generator that sits unused is more prone to battery failure, dried-out seals, and corrosion — all repairs you can head off with routine exercise.
- Get the problem diagnosed before authorizing repairs. Minimum service call fees run $150-$300+ (HomeGuide), so ask what that covers and get a firm repair estimate before work starts.
- Weigh repair against replacement for major failures. If a stator/rotor or engine repair ($250-$2,500) starts approaching what a new portable unit costs, replacement may be the better value.
- Confirm whether the real issue is your generator or your house wiring. If a technician traces the problem back to your home’s electrical system rather than the unit, that’s house rewiring territory, priced separately from generator repair.
Prices vary by region, generator brand, and technician availability, so treat the figures above as a planning budget. Get two or three quotes for anything beyond a basic $50-$400 repair, and ask upfront whether the service call fee gets credited toward the final bill.
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Frequently asked questions
How much does it cost to repair a generator?+
Most repairs run $50 to $2,500 depending on what broke, with a typical service call averaging around $270 and landing between $171 and $396 (HomeAdvisor, Angi).
Is it cheaper to repair a portable or a standby generator?+
Portable generators cost about $50 on average to service, while whole-house standby systems average $600 per repair visit — the bigger the unit, the more it typically costs to work on (HomeAdvisor, Angi).
How much does it cost to fix a generator transfer switch?+
Repairing an existing transfer switch runs $50 to $400. If it needs to be replaced instead, expect $200 to $2,500 (HomeAdvisor, Angi, HomeGuide).
Does generator repair cost include a service call fee?+
Often yes — many technicians charge a minimum service call fee of $150 to $300 or more before parts or additional labor even get added (HomeGuide).
How much does annual generator maintenance cost?+
An annual maintenance plan typically runs $150 to $650 a year, compared with $80 to $300 for a basic single service visit (Angi, HomeGuide, Bob Vila, Forbes Home).
How much does it cost to replace a generator battery?+
None of the major cost-data sources publish a specific battery-replacement price. HomeAdvisor recommends replacing the battery about every three years, since a generator can develop battery trouble if it sits unused for long stretches.
What's the most common reason a generator needs repair?+
Forbes Home points to five recurring culprits: cooling system issues (leaking gaskets or coolant hoses), electrical problems, fuel system failures, worn or cracked belts, and heat-damaged components.
How often should a generator be serviced?+
At minimum once a year, according to Forbes Home, though many owners schedule two visits a year — before hurricane season and before winter — to catch problems before an outage.
Sources
Figures synthesized and cross-checked across these sources (retrieved 2026-07-28):
- HomeAdvisor — Average generator repair cost is $274; typical range $171-$396 per service. Annual maintenance and upkeep costs $200-$600 per year. Maintaining a portable generator costs an average of $50; maintaining a standby generator costs an average of $600. By part: stator and rotor $250-$1,500; carburetor $60-$500; engine $50-$2,000; voltage regulator averages $80; transfer switch repair $50-$200; transfer switch replacement $200-$400 plus 3-4 hours of electrical labor. Recommends replacing the battery every three years.
- HomeGuide — Generator maintenance and repair costs range from $50 for a minor repair to $2,500 to fix a major malfunction. Annual generator maintenance plans cost $200-$650 on average. Many repair technicians have a minimum service call fee of $150-$300+. By part: stator and rotor $250-$2,500; carburetor $100-$500; engine repair $150-$2,000; voltage regulator $100-$800; transfer switch repair $50-$400; transfer switch replacement $400-$2,500. Annual maintenance by type: portable (7-10kW) $50-$150/year; propane $200-$600/year; natural gas $200-$650/year; gas or diesel $200-$1,000; engine-driven 30-45kW generators $350-$600 annually.
- Angi — Professional whole-house generator maintenance costs $171-$396 per service, averaging $273. Expect to pay $200-$600 annually for maintenance and upkeep; annual service contracts run around $150-$300. By part: stator and rotor $250-$1,500; carburetor $60-$500; engine $50-$2,000; voltage regulator averages $80; transfer switch repair $50-$150; transfer switch replacement $200-$400. Portable generators (7-10kW) average $50 to maintain; engine generators (30-45kW) average $600.
- Bob Vila — Yearly maintenance on a standby generator usually costs between $80 and $300 when a homeowner pays a pro instead of doing it themselves.
- Forbes Home — Basic generator maintenance services usually range from $80 to $300.
- Forbes Home — The average cost across the board for generator servicing is around $260. By part: transfer switch $200-$400; carburetor $50-$500; rotor $250-$1,500; engine $50-$2,000. A repair on a portable generator can be as little as $50, but the same repair on a whole-home model could cost as high as $600. Common failure causes include cooling system issues (leaking gaskets, cracked cylinder heads, leaking coolant hoses), electrical problems, fuel system failures, belt deterioration, and burned components. Generators should be serviced at minimum once a year.
Sources cluster tightly around a typical per-visit repair cost: HomeAdvisor ($274 average, $171-$396 typical range) and Angi ($273 average, $171-$396 typical range) are nearly identical, and Forbes Home's separate repair-focused page puts the average at $260 — all three land in the same $260-$274 band. national_average_usd ($270) is a rounded synthesis of that cluster, not a copy of any single source. range_low_usd/range_high_usd ($50-$2,500) use HomeGuide's framing of the full spread from a minor fix to a major malfunction, which matches the low and high ends of the per-part breakdowns from HomeAdvisor, Angi, and Forbes Home (engine repairs up to $2,000-$2,500, transfer switch repairs as low as $50). project_low_usd/project_high_usd ($171-$396) is the narrower 'typical service visit' band HomeAdvisor and Angi both cite verbatim, distinct from the wider full-spectrum range. by_type figures combine the per-part repair tables from HomeAdvisor, Angi, HomeGuide, and Forbes Home, using the widest low-high span where sources differ (e.g., transfer switch replacement: HomeAdvisor/Angi say $200-$400, HomeGuide says $400-$2,500, so the published row is $200-$2,500). The 'annual maintenance contract' row blends Bob Vila and Forbes Home's $80-$300 service-plan figure with HomeAdvisor/Angi's $200-$600 and HomeGuide's $200-$650 annual maintenance figures — these are yearly costs, not per-repair costs, and are called out as such in the guide. No source in this research set (HomeAdvisor, Angi, HomeGuide, Bob Vila, Forbes Home) publishes a specific dollar figure for battery replacement alone, so no battery price is published here — only the maintenance interval HomeAdvisor recommends (every three years) and the failure-risk note from HomeGuide (letting a generator sit unused invites battery failure).