Road diesel · national average · Monday 28 Sep 2026
Diesel prices in Ireland€2.123 a litre, up 7.3 cent on the week; petrol €1.972.
Dipstick: this week's diesel average sits 92% of the way between its five-year low and high
| Fuel, freight and margin | 135.3c | 63.7% | |
| Excise (non-carbon) | 18.2c | 8.6% | |
| Carbon tax | 19.0c | 9.0% | |
| NORA levy | 0.1c | 0.0% | |
| VAT | 39.7c | 18.7% |
A litre of road diesel cost €2.123 on average on Monday 28 September 2026, against €1.972 for petrol. The gap of 15.1 cent between the two is mostly a wholesale story: before tax, diesel costs 135.3 cent a litre to put in the tank, petrol 109.9 cent.
The diesel average has risen for eleven consecutive weeks. Compared with Monday 29 September 2025, a 50-litre fill of diesel has moved by +€23.08; compared with four weeks ago the litre is +19.2c.
The highest weekly average in the Commission's Irish series is €2.178 on 30 Mar 2026. The current figure is 5.5 cent from that mark.
Road transport operators recover some diesel excise through the Diesel Rebate Scheme, kept in its enhanced form until 31 December 2026 under the August decision. The bulletin measures the pump price before any such refund. Green diesel, the marked version for farm and off-road use, is priced separately on marked gas oil prices.
Diesel over time
| Week of | €/L | On week | Fuel + margin | Tax |
|---|---|---|---|---|
| 28 Sep 2026 | €2.123 | +7.3c | 135.3c | 77.0c |
| 21 Sep 2026 | €2.050 | +6.0c | 129.4c | 75.6c |
| 14 Sep 2026 | €1.989 | +3.6c | 124.4c | 74.5c |
| 7 Sep 2026 | €1.954 | +2.3c | 121.6c | 73.8c |
| 31 Aug 2026 | €1.931 | +2.5c | 119.7c | 73.4c |
| 24 Aug 2026 | €1.906 | +0.5c | 117.6c | 72.9c |
| 17 Aug 2026 | €1.901 | ±0.0c | 117.3c | 72.8c |
| 10 Aug 2026 | €1.901 | +5.5c | 117.2c | 72.8c |
| 3 Aug 2026 | €1.846 | +9.4c | 112.8c | 71.8c |
| 27 Jul 2026 | €1.752 | +5.7c | 105.1c | 70.0c |
| 20 Jul 2026 | €1.695 | +0.6c | 100.5c | 69.0c |
| 13 Jul 2026 | €1.689 | −2.3c | 100.1c | 68.9c |
The diesel premium, year by year
| Year | Diesel | Petrol | Diesel − petrol |
|---|---|---|---|
| 2026 | €1.883 | €1.810 | +7.2c |
| 2025 | €1.707 | €1.737 | −3.0c |
| 2024 | €1.700 | €1.748 | −4.8c |
| 2023 | €1.660 | €1.678 | −1.8c |
| 2022 | €1.893 | €1.851 | +4.2c |
| 2021 | €1.414 | €1.515 | −10.1c |
| 2020 | €1.199 | €1.291 | −9.2c |
| 2019 | €1.321 | €1.403 | −8.2c |
| 2018 | €1.341 | €1.438 | −9.7c |
| 2017 | €1.243 | €1.364 | −12.0c |
| 2016 | €1.148 | €1.283 | −13.5c |
| 2015 | €1.259 | €1.369 | −11.0c |
Where the excise timetable takes diesel
The running price adds each announced step to this week’s average and holds everything else constant; it is arithmetic on the timetable, not a forecast. Status and sources are on the calendar of fuel tax changes.
| Date | Change | Step | Running price | Status |
|---|---|---|---|---|
| 7 Oct 2026 | Carbon tax on petrol and diesel, €71 to €78.50 per tonne | +2.5c | €2.148 | on the 2020 path |
| 1 Nov 2026 | First step of the excise restoration | +7.0c | €2.218 | announced |
| 1 Nov 2026 | NORA levy returns from 0.1 cent to 2 cent a litre | +2.3c | €2.241 | announced |
| 1 Dec 2026 | Second step of the excise restoration | +7.0c | €2.311 | announced |
| 31 Jan 2027 | Third step of the excise restoration | +8.0c | €2.391 | announced |
| 28 Feb 2027 | Final step: pre-March 2026 excise rates restored | +8.0c | €2.471 | announced |
More of the accounts
Questions on diesel
Why is diesel dearer than petrol in Ireland?
Because the fuel costs more before tax. On Monday 28 September 2026 the pre-tax part of a diesel litre was 135.3 cent, against 109.9 cent for petrol, while diesel carries less excise. Diesel ended up 15.1 cent dearer.
What is the highest diesel price recorded in Ireland?
In the Commission's weekly series, which starts in 2005, the highest Irish diesel average is €2.178 on 30 Mar 2026.
How much will diesel go up in November?
The first restoration step adds 7 cent a litre on 1 November 2026, and the NORA levy returns to 2 cent the same day. Across the four steps to 28 February 2027 the announced total is 32.3 cent, VAT included.