Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Independent-shop door rate for your state band. Dealer rates are handled separately below.
Most states tax parts; several tax labor too. Pick the band closest to your county rate.
Result
What you pay
$3,567
Full cost before warranty
$3,567
Low end of quote range
$2,853
High end of quote range
$4,636
Cost per year of pack life
$446
Pack and hardware including tax
$3,647
Install labor
$420
Repair as share of vehicle value
40%
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter replacement route.
- 2Enter cables, fans, hardware and coolant ($).
- 3Enter install labor hours (hours).
- 4Enter state shop labor rate — Independent-shop door rate for your state band. Dealer rates are handled separately below..
- 5Enter state + local sales tax on parts — Most states tax parts; several tax labor too. Pick the band closest to your county rate..
- 6Enter core credit for the old pack ($).
- 7Enter warranty status.
- 8Enter expected life of the new pack (years).
- 9Enter current value of the vehicle ($).
- 10Read your what you pay on the right — it updates as you type.
- 11Hit Share to keep the scenario or send it to someone.
About this calculator
Hybrid and EV battery replacement is the single figure that decides whether these cars are cheap or ruinous to own, and the honest answer is that it depends on which of four routes you take. Federal rules require at least eight years or 100,000 miles of coverage on the traction battery — longer in CARB states — so the first question is always whether you are paying at all. If you are, a module-level rebuild on an older hybrid can be a few thousand dollars, a remanufactured pack somewhat more, and a new dealer pack on a modern EV can approach the value of the car. This calculator prices each route with a state labor rate, adds the core charge and disposal, and shows the cost per remaining year of expected pack life. Worked assumption for the defaults: a remanufactured hybrid pack at $3,200, 4 hours labor at the $105 US-average rate, $200 in hardware, 7.25% tax minus a $500 core credit — about $3,570, or roughly $450 a year over eight expected years.
Worked example
Using the values the calculator loads with:
Inputs
- Replacement route: Remanufactured pack with warranty — $3,200
- Cables, fans, hardware and coolant: 200 $
- Install labor hours: 4 hours
- State shop labor rate: US average — $105/hr
- State + local sales tax on parts: US average with local add-ons (~7.25%)
- Core credit for the old pack: 500 $
- Warranty status: Out of warranty — you pay
- Expected life of the new pack: 8 years
- Current value of the vehicle: 9000 $
Results
- What you pay: $3,567
- Full cost before warranty: $3,567
- Low end of quote range: $2,853
- High end of quote range: $4,636
- Cost per year of pack life: $446
- Pack and hardware including tax: $3,647
- Install labor: $420
- Repair as share of vehicle value: 40%
What each field means
Inputs
- Replacement route
- Pick the option that matches your situation — the maths changes per option. Choices: Module-level rebuild (older hybrid) — $1,500, Used pack from a donor vehicle — $2,400, Remanufactured pack with warranty — $3,200, New dealer hybrid pack — $6,500, New EV traction pack — $15,000.
- Cables, fans, hardware and coolant ($)
- The cables, fans, hardware and coolant used in the calculation, measured in $. Starts at 200 $ so you have a working example on load. Accepted range: 0–3000 $.
- Install labor hours (hours)
- The install labor hours used in the calculation, measured in hours. Starts at 4 hours so you have a working example on load. Accepted range: 1–20 hours.
- State shop labor rate
- Independent-shop door rate for your state band. Dealer rates are handled separately below.
- State + local sales tax on parts
- Most states tax parts; several tax labor too. Pick the band closest to your county rate.
- Core credit for the old pack ($)
- The core credit for the old pack used in the calculation, measured in $. Starts at 500 $ so you have a working example on load. Accepted range: 0–3000 $.
- Warranty status
- Pick the option that matches your situation — the maths changes per option. Choices: Out of warranty — you pay, Inside 8 yr / 100k federal coverage (or 10 yr / 150k in CARB states).
- Expected life of the new pack (years)
- The expected life of the new pack used in the calculation, measured in years. Starts at 8 years so you have a working example on load. Accepted range: 1–20 years.
- Current value of the vehicle ($)
- The current value of the vehicle used in the calculation, measured in $. Starts at 9000 $ so you have a working example on load. Accepted range: 0–200000 $.
Results
- What you pay
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Full cost before warranty
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Low end of quote range
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- High end of quote range
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Cost per year of pack life
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Pack and hardware including tax
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Install labor
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Repair as share of vehicle value
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How long does the federal warranty last?
At least 8 years or 100,000 miles on the traction battery under federal rules, and 10 years or 150,000 miles in states that follow California's requirements for newer vehicles. Check the in-service date, not the model year, and get the dealer to run a state-of-health test in writing before you buy anything.
Is a module rebuild worth it?
On an older nickel-metal-hydride hybrid, often yes — the failed modules are replaced and the pack rebalanced for a fraction of a new pack. It buys years, not a decade, and the shop's warranty is the thing to compare.
Do EV packs really need replacing?
Most do not within typical ownership. Real-world fleet data shows gradual capacity fade rather than outright failure, and outside recalls and rare defects, full pack replacement is uncommon. Price it as a tail risk, not an expected maintenance item.
Why show a range instead of one price?
Because two honest shops quote the same job 20–30% apart on parts sourcing alone — OEM versus quality aftermarket, remanufactured versus new, and whether the flat-rate book hours match what the job actually takes on your vehicle. The range is the band most real quotes land inside; the midpoint is what to expect.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Cost to Replace a Hybrid or EV Battery Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/cost-to-replace-a-hybrid-battery-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/cost-to-replace-a-hybrid-battery-calculator" target="_blank" rel="noopener">Cost to Replace a Hybrid or EV Battery Calculator — RevenueLab</a> (2026).</p>
Source: [Cost to Replace a Hybrid or EV Battery Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/cost-to-replace-a-hybrid-battery-calculator) (2026).