Network tariffs 2027: proposals point to transport costs around 20 percent higher
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If you take electricity or gas through the regional grid or the high-voltage grid, you will probably pay considerably more to have it transported in 2027. The regional grid operators and TenneT have submitted their tariff proposals for 2027, and the ACM published them on 7 October. These are still proposals: the final tariffs follow in November.
How much, and for whom
Households and businesses on the regional grids are expected to pay around 20 percent more on average in 2027 for the transport of electricity and gas. The ACM said so when it published the proposals. For an average household, that means roughly €89 a year more for electricity and €52 more for gas transport. The figure differs per grid operator: for large business connections, Enexis proposes network costs that are 21.9 percent higher on average for electricity and 24.3 percent higher for gas. TenneT proposes to raise high-voltage (HV) tariffs by 20 percent on average and to lower extra-high-voltage (EHV) tariffs by 6 percent.
Proposed change in network tariffs for 2027
Show the figures
| Change 2027 vs 2026 | |
|---|---|
| Regional grid operators, average | 20.0% |
| Enexis large business, electricity | 21.9% |
| Enexis large business, gas | 24.3% |
| TenneT high voltage (HV) | 20.0% |
| TenneT extra-high voltage (EHV) | −6.0% |
The fall on extra-high voltage mainly comes from higher calculation volumes. For 2027, TenneT uses an estimate of the volume instead of realised volumes from earlier years, so the costs are spread over more volume. According to the proposal, the tariff for contracted capacity on that grid level does rise. What it means for you therefore depends on your profile.
These are proposals; the ACM decides in November
The percentages in this article are proposals from the grid operators, not approved tariffs. The ACM is now assessing them and will decide on the regional grid operators' tariffs in November 2026. The decision on TenneT follows at the end of November; responses to TenneT's proposal can be submitted until 24 October 2026. Besides Enexis, the proposals of Liander, Stedin, Coteq, RENDO and Westland are also with the ACM for assessment. The final figures may therefore still differ from those shown here.
Where the money goes
The rise is mainly driven by the investment needed to expand and reinforce the congested electricity grid. Grid operators are laying new cables and building substations and high-voltage stations, and those costs reach users through the tariffs. Gas is a different story: consumption is falling, so the cost of the gas grid is shared among fewer and fewer customers. The ACM makes sure grid operators only recover efficient costs.
At TenneT, the offshore grid weighs heavily. TenneT's total allowed revenue for 2027 is around €3,324 million. For phase II of the offshore grid, €969 million is recovered through onshore tariffs, 89 percent more than in 2026, plus a remaining €120 million for phase I. TenneT dampens the increase with €245 million of auction revenues and defers 20 percent of its recalculations to later years.
Offshore grid and dampening in TenneT's 2027 proposal
| Item | € m | Note |
|---|---|---|
| TenneT allowed revenue 2027 | 3,324 | approximately |
| Offshore grid phase II, via onshore tariffs | 969 | +89% compared with 2026 |
| Offshore grid phase I, remainder via onshore tariffs | 120 | subsidy is capped at €181m a year |
| Dampening with auction revenues | −245 | from the auction revenue balance |
| Recalculations deferred | - | 20% moved to later years |
VEMW, which represents large business energy users, considers the dampening sensible but the increase still steep. The industry association responded on 8 October:
TenneT's decision to dampen the tariff rise by using auction revenues and spreading recalculations over several years is sensible. But an average increase of 20% for HV-connected users remains steep.
What does this mean for you?
- Budget for higher network costs in 2027. A 20 percent increase means €2,000 more for every €10,000 of transport costs.
- Check which grid operator and which grid level your connection is on. According to the proposals, tariffs fall on average on extra-high voltage and rise on high voltage and in the regional grids.
- Check whether your contracted transport capacity still matches your actual peak. You pay for that capacity even when you do not use it.
- Look up the final tariffs the ACM sets in November and update your estimate.
- Keep in mind that large connections (above 3x80 amperes) to the regional grids are expected to pay time-dependent network tariffs from 1 January 2028; the ACM has published a draft decision on this.
Sources: ACM (14 September 2026 and 7 October 2026), TenneT 2027 tariff proposal (29 September 2026), Enexis (October 2026), VEMW (8 October 2026).
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