Plug-in hybrid vs. full electric car: which is better suited for a Finnish winter?
Author:
Miia Väänänen
Copywriter
Published:
10.11.2026
When comparing a plug-in hybrid (PHEV) and a fully electric vehicle at a car dealership, the question "which one handles cold weather better" almost always comes up. This guide covers how each performs in winter, how the 2026 tax reform changed their costs, and which type of driver each option suits best.
In brief: Finland's winter challenges every powertrain — cold engines slow down gasoline and diesel cars too, worn 12-volt batteries cause issues, and deteriorating road conditions add resistance. Despite this, an electric vehicle is an excellent car year-round: it always starts reliably at full power even in freezing temperatures, and its range only temporarily decreases by 20–50 percent. A plug-in hybrid's electric range shrinks more dramatically in severe cold and can, at worst, be nearly depleted entirely, causing the car to rely on the combustion engine. This doesn't make it a bad car — it simply serves as a reminder that its benefits are best realized when it's charged regularly. The 2026 tax changes tipped the scales in favor of fully electric vehicles for most buyers, but a plug-in hybrid is still a good choice if you frequently drive long distances or need towing capacity.
How does cold weather affect an electric vehicle's range?
An electric vehicle's range decreases by 20–50 percent in winter compared to summer figures, because battery energy is used not only for driving but also for heating the cabin and the battery itself.
At around -20 degrees Celsius, energy consumption can increase by 30–40 percent, meaning a summer range of 400 kilometers could shrink to around 250 kilometers. In practice, an EV that normally consumes 15–25 kWh/100 km may consume over 35 kWh/100 km in cold weather and on short trips — especially if the battery hasn't been preheated before departure. Preheating while plugged in is the single most effective way to keep winter consumption in check, since it avoids drawing energy from the drive battery for heating. However, temperature does not affect the car's reliability or ability to start: the electric motor delivers full power immediately, even in severe frost.
How does cold weather affect a plug-in hybrid's electric driving?
A plug-in hybrid's electric range decreases in cold weather in a similar way to a fully electric vehicle, but more dramatically: in severe cold, pure electric driving becomes difficult and in many models nearly ceases entirely, causing the combustion engine to start automatically to both heat and power the vehicle.
The exact threshold varies by model and heating system (such as a heat pump), but as a rough rule of thumb, many models hit this limit around -10 degrees Celsius. In severe cold, a plug-in hybrid therefore operates largely like a conventional hybrid, even if the battery is fully charged.
One thing worth keeping in mind: if the car isn't charged regularly, it tends to consume more fuel than a standard non-plug-in hybrid, since the heavy battery pack is carried along regardless. A plug-in hybrid makes the most sense when it's actually charged — in that case, it smoothly combines quiet, affordable electric driving for everyday use with the reliability of a combustion engine for longer trips.
The latest plug-in hybrid models already achieve over 100 kilometers of electric range on the WLTP cycle, which covers a large portion of Finnish daily driving in warm weather. In cold weather, this figure also decreases, so manufacturer-stated ranges should be treated as best-case estimates — not guarantees.
Do gasoline and diesel cars also suffer in winter?
Yes — cold weather spares no powertrain; each has its own winter challenges.
In gasoline and diesel cars, a cold engine consumes more fuel before reaching operating temperature, and rolling resistance on snowy or slushy roads can increase by up to 40 percent compared to clean asphalt. Severe cold also strains the 12-volt lead-acid battery, which is why starting problems increase in winter across all vehicle types — including EVs and plug-in hybrids, which have their own smaller auxiliary batteries. In diesel vehicles, cold temperatures can also cause paraffin in the fuel to crystallize, which is why a special winter-grade diesel is used in cold months. Many combustion engine drivers rely on the same solution as EV drivers: a block heater, which eases cold starts and reduces fuel consumption.
Electric motors don't have the same cold-start issues — they don't suffer from cold oil or freezing fuel, and deliver full torque immediately. As a result, both fully electric vehicles and plug-in hybrids are practical and reliable cars year-round, as long as you plan ahead for the temporary reduction in range.
EV vs. plug-in hybrid in winter — comparison at a glance
Fully Electric Vehicle | Plug-In Hybrid | Gasoline/Diesel | |
In winter | Range decreases 20–50%, but the car always starts and runs on electricity | Electric range decreases significantly, can nearly run out entirely in severe cold | Cold engine increases fuel consumption, 12V battery is strained, snow/slush increases rolling resistance |
Typical WLTP electric range | approx. 300–600 km | approx. 40–100+ km (latest models) | – |
Vehicle tax power source levy 2026 | 1.9 cents/day/100 kg (up from 1.5 cents) | 0.95 cents/day/100 kg for gasoline models (up from 0.5 cents) | No power source levy for gasoline; 5.5 cents/day/100 kg for diesel |
Car tax | 0%, exempt as zero-emission vehicle | Increased as EU emissions calculation tightened | Based on CO2 emissions |
Charging benefit for company cars (from 2026) | €30/month, taxable | €20/month, taxable | Not applicable |
Operating cost deduction (free car benefit) | €120/month | €60/month | No equivalent deduction |
Taxation and costs in 2026 — which is cheaper?
The changes that took effect at the start of 2026 shifted the calculation in favor of fully electric vehicles for most buyers, even though taxation increased somewhat for both.
Car tax: Fully electric vehicles remain exempt from car tax as zero-emission vehicles. Plug-in hybrid car taxes, on the other hand, have increased because the EU's tightened utility factor has been gradually raising the official CO2 and consumption figures for plug-in hybrids since 2025, with another tightening coming in November 2026. Finland's car tax is based on these official emissions figures, so the plug-in hybrid's car tax rises as its calculated emissions figure increases.
Vehicle tax: According to Traficom, the base vehicle tax for a fully electric car is €106.21/year from January 1, 2026, for vehicles registered by September 30, 2021, and €171.18/year for newer vehicles — that is, those registered on or after October 1, 2021 — which in practice covers the majority of used EVs currently on the market. Both levels increased at the start of 2026. In addition, the power source levy for electric vehicles rose from 1.5 cents to 1.9 cents per day per every 100 kilograms (or part thereof), and the levy for gasoline-powered plug-in hybrids rose from 0.5 cents to 0.95 cents. Since the power source levy depends on the vehicle's weight, the annual vehicle tax for a fully electric car is now most commonly around €210–320, and for the heaviest and newest models, nearly €350 per year — the exact amount can be found using Traficom's vehicle tax calculator.
Company cars: The change is especially noticeable for company vehicles. Starting in 2026, a standard taxable value was introduced for employer-provided charging benefits (€30/month for fully electric vehicles, €20/month for plug-in hybrids), whereas it was previously tax-free. The operating cost deduction for the free car benefit is €120/month for fully electric vehicles, while for plug-in hybrids it dropped to €60/month after the previous €85 deduction was eliminated at the turn of 2025–2026. The €170/month monthly tax incentive for fully electric vehicles continues at least until 2029.
Overall, after the 2026 tax changes, a fully electric vehicle is the more affordable option for most buyers — especially those whose daily driving consists of short, recurring trips and who have access to home charging.
Which one is right for you?
A plug-in hybrid is still a smart choice if:
- your daily drives are under 50 km, but you regularly take long trips in areas where charging availability is uncertain
- you tow a trailer, boat, or camper — many plug-in hybrids still offer better towing capacity than a fully electric vehicle in the same price range
- you want peace of mind knowing that severe cold won't cause unpleasant surprises with your range
A fully electric vehicle is the clear choice if:
- you drive a lot of miles per year, making the cost per mile low
- you have access to charging at home or at work
- you value lower maintenance costs and want to benefit from zero car tax
Is the charging network sufficient for winter road trips?
Finland's fast-charging network already covers most major highways well, but coverage remains thinner in sparsely populated areas.
The EU's AFIR regulation requires fast-charging stations at least every 60 kilometers on the TEN-T core network, which includes approximately 6,100 kilometers of Finland's most important main roads. In southern and western Finland and along the main road network, charging is already generally easy — in rural areas and the northern parts of Lapland, charging points are still more sparse.
Battery condition when buying used — what should you check?
Whether you're buying a used plug-in hybrid or a fully electric vehicle, the battery condition should always be verified separately — it's not directly reflected in the mileage.
The drive batteries of electric vehicles and plug-in hybrids sold by Saka are tested using the Aviloo battery test, which reports the battery's condition as a State of Health (SoH) percentage:
- above 90% indicates excellent condition
- 80–89% is normal, good condition
- below 80% is slightly degraded, but not necessarily problematic yet
- below 70% is the battery warranty threshold for many manufacturers
Alongside the battery test, it's also worth reviewing the vehicle's third-party condition inspection, which provides a comprehensive picture of the car's technical condition before making a purchase decision.
Frequently asked questions
Can a fully electric vehicle handle Finland's cold weather?
Yes. An electric vehicle's range typically decreases by 20–50 percent in cold weather, but the car always runs on electricity and does not require a combustion engine regardless of the temperature.
Does a plug-in hybrid's electric driving work in cold weather?
In many models, pure electric driving becomes difficult or nearly ceases entirely at around -10 degrees Celsius, at which point the combustion engine starts automatically to heat the cabin and power the vehicle. The exact threshold varies by model.
Do gasoline and diesel cars also struggle in Finland's winter?
Yes. A cold engine increases fuel consumption, the 12-volt battery is strained in freezing temperatures, and snow or slush can increase rolling resistance by up to 40 percent. Every powertrain has its own winter challenges — electric vehicles and plug-in hybrids are no exception, but with proper care they perform excellently in winter as well.
Which is cheaper after the 2026 tax changes — an EV or a plug-in hybrid?
For most buyers, a fully electric vehicle is more affordable, since it remains exempt from car tax and its vehicle tax increase has been more modest than the rise in plug-in hybrid car taxes, which is driven by the EU's tightened emissions calculation.
Is a plug-in hybrid worth it if you don't charge it regularly?
Generally, no. A plug-in hybrid that isn't charged tends to consume more fuel than a standard non-plug-in hybrid due to the weight of its battery pack, so its benefits are only realized through regular charging.
How can you find out the actual battery condition of a used EV or plug-in hybrid?
The most reliable method is a battery test that reads data from the vehicle's battery management system and provides a SoH percentage. Electric vehicles and plug-in hybrids sold by Saka are tested using the Aviloo battery test.
Summary
Finland's winter challenges every powertrain in its own way — cold engines and strained 12-volt batteries affect gasoline and diesel cars, shrinking electric range affects plug-in hybrids, and temporarily reduced range affects fully electric vehicles. Despite this, both fully electric vehicles and plug-in hybrids are reliable, capable cars year-round, as long as you plan ahead for range and charging. After the 2026 tax reform, a fully electric vehicle is the more cost-effective choice for most buyers, but a plug-in hybrid holds its own for those who regularly drive long distances, need towing capacity, or want the security of not having to plan around charging. The best choice comes down to comparing your own driving profile — annual mileage, typical trip lengths, and charging options — against these two alternatives.
Considering buying a used electric vehicle or plug-in hybrid? Check out the Aviloo battery test and verify the battery's true condition before making your purchase decision.
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