2026 heat-pump tariffs: the night-vs-day gap is widest in Europe’s colder markets

Europe’s 2026 tariff gap: where night electricity is actually cheap

In 2026, meaningful off-peak heat-pump savings are concentrated in a minority of colder markets: among the four countries in the tariff-gap dataset, Sweden has the widest day-night spread at €0.2711/kWh by day versus €0.1771/kWh at night, a 34.7% discount, while France has the smallest at €0.2561 versus €0.1785, down 30.3% and Germany still posts the highest absolute daytime tariff at €0.3869/kWh (tariff_history).

That matters because the question is not whether a heat pump is efficient, but whether time-of-use pricing is wide enough to reward operational flexibility. In the latest semester covered here, the four-country ranking by absolute day-night gap is Germany €0.1244/kWh, Sweden €0.0940/kWh, Poland €0.1170/kWh, and France €0.0776/kWh; by percentage gap, it is Sweden 34.7%, Germany 32.2%, Poland 43.2%, and France 30.3% if measured as the night discount relative to day price, with Poland’s lower night tariff making the proportional spread especially large (tariff_history).

The broader market context still matters. In the 32-country comparison, colder markets such as Estonia (4,474 HDD), Finland (4,408 HDD), Lithuania (4,423 HDD), Latvia (4,407 HDD), Norway (5,040 HDD) and Sweden (4,242 HDD) combine long heating seasons with household electricity prices from €0.1922/kWh in Norway to €0.2711/kWh in Sweden (country_compare). For buyers comparing equipment options, that makes tariff structure at least as relevant as model choice once the system is already properly sized; our country comparison dashboard, climate-fit analyzer, and heat-pump catalog are the right starting points for that screening.

The colder-market premium: which countries show the widest day-night spreads

Within the countries for which semi-annual day-night tariff history is available, the cold-climate premium is visible but not universal. Sweden, the only country in this subset classified as colder, shows a €0.0940/kWh night advantage in the latest half-year, with average annual heating demand pressure of 4,242 HDD (tariff_history; country_compare). Germany and Poland are not classified as colder in the corpus, but they still show large nominal spreads because daytime electricity is expensive: Germany €0.3869 day vs €0.2625 night, Poland €0.2709 vs €0.1539 (tariff_history).

On that basis, the largest exact gaps in 2026 among the countries observed here are:

Germany: €0.3869 day, €0.2625 night, gap €0.1244/kWh, 32.2% (tariff_history)
Poland: €0.2709 day, €0.1539 night, gap €0.1170/kWh, 43.2% (tariff_history)
Sweden: €0.2711 day, €0.1771 night, gap €0.0940/kWh, 34.7% (tariff_history)
France: €0.2561 day, €0.1785 night, gap €0.0776/kWh, 30.3% (tariff_history)

The colder-market takeaway is narrower than the headline might suggest. The corpus does not provide day-night tariff splits for all colder countries in Europe, so it cannot support a continent-wide ranking beyond these observed cases. What it does show is that off-peak arbitrage is most attractive where three factors overlap: high heating demand, high daytime electricity, and a materially lower night rate. On that screen, Sweden stands out cleanly, while Germany looks compelling on tariff spread even without a colder-climate label (tariff_history; country_compare). For national context, see Germany, France, and [Sweden’s country profile is not available in the supplied link list, so I cannot link it].

How much load shifting can save in euros and cents per kWh

The simplest measure is the avoided electricity cost per shifted kilowatt-hour of heat-pump consumption. On that metric, a household that can move compressor-heavy operation from day to night saves:

12.44 euro cents/kWh in Germany (tariff_history)
11.70 euro cents/kWh in Poland (tariff_history)
9.40 euro cents/kWh in Sweden (tariff_history)
7.76 euro cents/kWh in France (tariff_history)

That is large enough to matter if the building and controls can actually shift load. A thermal store, underfloor slab, or oversized emitter circuit can turn a 9–12 cent/kWh tariff gap into meaningful annual savings; a low-mass building with little storage may not capture much of it. The article angle here is timing, not equipment, but control-compatible systems will tend to benefit more than basic on/off retrofits. Buyers comparing system architectures can cross-check candidate units in the air-to-water SCOP leaderboard, the broader market index, and the payback calculator.

How many countries have a clearly meaningful advantage versus a trivial one? In the available day-night dataset, three of four countries show a spread of at least €0.09/kWh—Germany, Poland and Sweden—while one of four, France, is below that mark at €0.0776/kWh (tariff_history). The corpus does not define an official “meaningful” threshold, so that cutoff is an analytical convention rather than a sourced benchmark.

Where the gap has widened or narrowed since the latest tariff history

The latest semi-annual history shows divergence rather than convergence. Comparing the latest half-year in 2025 with the earliest half-year in 2018, the day-night gap changed by:

Germany: from €0.1608/kWh in 2018 H1 to €0.1244/kWh in 2025 H2, a narrowing of 3.64 euro cents/kWh (tariff_history)
France: from €0.0614/kWh to €0.0776/kWh, a widening of 1.62 cents/kWh (tariff_history)
Poland: from €0.0504/kWh to €0.1170/kWh, a widening of 6.66 cents/kWh (tariff_history)
Sweden: from €0.0708/kWh to €0.0940/kWh, a widening of 2.32 cents/kWh (tariff_history)

By that measure, Poland shows the biggest widening, while Germany shows the biggest narrowing among the observed countries (tariff_history). Looking only at the most recent two semesters, the trend is mixed again: Germany’s spread rose from €0.1237 to €0.1244, France fell from €0.0769 to €0.0776 after a prior drop, Poland widened from €0.1080 to €0.1170, and Sweden widened from €0.0927 to €0.0940 (tariff_history).

That is a useful reminder for installers: tariff-driven savings are not static. If a project depends on aggressive load shifting for its economics, check the current national tariff profile rather than relying on a 2023 or 2024 assumption. Our methodology page explains the household price definitions behind these comparisons.

Does off-peak pricing beat the gas benchmark for heat pumps?

Across the full ratio dataset, 18 countries still have an electricity-to-gas tariff ratio below the rough SCOP 4 break-even threshold of 4.0, while 2 countries with reported gas data are above it: the United Kingdom at 4.63 and Romania at 5.11 (price_ratio). That means most reported markets remain under the simple electricity-versus-gas hurdle even before off-peak arbitrage is considered (price_ratio).

The threshold lines up only partly with where night pricing is most useful. Sweden is the clearest overlap: it is a colder market with a low ratio of 1.30 and a wide day-night gap of €0.0940/kWh (price_ratio; country_compare; tariff_history). France also sits comfortably below the threshold at 1.78, but its climate is average and its spread is the smallest in the day-night subset at €0.0776/kWh (price_ratio; country_compare; tariff_history). Germany at 3.16 and Poland at 3.71 are still below the SCOP-4 line, but much closer to it, making off-peak operation more economically relevant there because daytime electricity is expensive (price_ratio).

The strongest combinations of cold climate, high day tariff, and low off-peak price cannot be identified for all European countries from this corpus, because only four countries include day-night history. Based on the available data, Sweden is the cleanest cold-climate case for flexible control, while Germany and Poland are the strongest absolute-savings cases regardless of climate label (tariff_history; country_compare; price_ratio).

What buyers and installers should do when timing, not equipment, is the main lever

The practical message is narrow. Where the tariff gap is around €0.09–€0.12/kWh, flexible control is likely worth discussing at quote stage; where it is closer to €0.08/kWh or below, the payoff is more modest unless the home has unusually shiftable load (tariff_history). That points buyers toward controls, buffering and commissioning quality rather than a costly jump between similar-performing units in the full manufacturer catalog or heat-pump listings.

For colder or high-price markets, installers should test three things early: tariff structure, building thermal inertia, and whether the chosen system can pre-heat without comfort loss. If those conditions line up, timing can materially cut annual operating cost even when the equipment itself is unchanged. Country-specific subsidy stacks can still matter on capital cost, so check national subsidy schemes, including Germany’s incentives and France’s incentives, alongside tariff economics.

Sources

tariff_history — Eurostat · electricity household band · series for DE. Snapshot: 2026-06-27.
tariff_history — Eurostat · electricity household band · series for FR. Snapshot: 2026-06-27.
tariff_history — Eurostat · electricity household band · series for PL. Snapshot: 2026-06-27.
tariff_history — Eurostat · electricity household band · series for SE. Snapshot: 2026-06-27.
country_compare — Eurostat · NASA POWER · EEA · Househeating Pulse subsidy register. Snapshot: 2026-06-27.
price_ratio — Eurostat household band DC (electricity) / D2 (gas), latest semester. Snapshot: 2026-06-27.