2 April 2026 · 6 min read
Oil Boiler Running Costs in 2026
What heating oil really costs across Somerset and how a new condensing oil boiler pays for itself.
Heating oil prices have stabilised through 2026, averaging 58–65p per litre across Somerset depending on order size and supplier.
For a typical 3-bed rural home using 2,500 litres a year, that's £1,450–£1,625 annually. An old non-condensing boiler running at 70% efficiency wastes nearly a third of that.
A modern Worcester Greenstar Heatslave or Grant Vortex condensing boiler runs at 92–95% efficiency. The fuel savings alone usually cover the install cost within 6–8 years — and warranties run to 10.
Bulk-buy oil in summer when prices dip, and book your annual service in spring to keep efficiency at its peak.