The Dutch Authority for Consumers and Markets (ACM) has released its latest Monitor on the consumer energy market, highlighting the growing impact of rising energy prices on households. The wholesale price of natural gas has surged to 86 euros/MWh, the highest level since December 2022, leading to increased costs for consumers.

Approximately 3.7 million households with dynamic or variable contracts are already feeling the pinch in their monthly bills. Those with fixed contracts will experience the effects once their contracts expire. Notably, around 700,000 households connected to heat networks will see their heat tariffs rise starting January 1, 2027, as these tariffs are linked to natural gas prices.

ACM has noted that the maximum heat tariffs are determined annually and are based on the principle that households connected to heat networks should not pay more than those using natural gas for heating. The authority is set to calculate the maximum tariffs for 2027 based on average prices for fixed natural gas contracts from specific reference dates in late 2026.

In addition to the expected 25% increase in heat tariffs, ACM is urging heat suppliers to only raise prices when absolutely necessary. The authority is also monitoring the financial returns of heat suppliers to prevent potential abuse of the situation.

Furthermore, the report indicates that while natural gas prices have risen, consumption has not significantly decreased. Since July, total natural gas consumption has dropped by about 5% compared to the previous year, despite prices being more than double. Factors such as milder temperatures and the prevalence of fixed contracts may be contributing to this limited response.

ACM continues to oversee energy supplier pricing, noting significant price differences among suppliers for model contracts, which are required to be offered by all energy providers.