The Cheapest Way to Heat a House in 2026, Ranked Honestly
Updated August 2026
In plain numbers: At current national averages, cost per unit of delivered heat ranks roughly: heat pump (in mild-to-moderate climates) ≈ natural gas at the top, then pellets and firewood, then fuel oil and propane, with electric resistance (baseboards, space heaters) most expensive. But the ranking is regional — cheap-electricity states crown the heat pump outright, cheap-gas states keep the furnace — and no fuel choice beats fixing a leaky envelope first. Our calculator ranks all seven for your state and prices.
The national ranking and why yours differs
Delivered-heat cost divides price by (energy content × system efficiency), and at national-average prices natural gas and heat pumps trade the crown: gas around the low teens per million BTU, heat pumps beside or below it wherever electricity is moderate and winters aren't brutal. Pellets and seasoned firewood follow; oil and propane run half-again to double gas; electric resistance sits at the bottom in almost every state.
Three local variables reorder everything: your electricity rate (hydro states make heat pumps unbeatable), your gas availability (propane-only rural areas change the whole board), and your winter severity (deep cold drags heat-pump COP toward the resistance floor). This is why we built the state pages — the national ranking is a starting point, not an answer.
The asterisk bigger than the ranking
Every dollar figure above assumes the house itself is fixed — and it isn't. A leaky, under-insulated home burning cheap gas often pays more per winter than a tight home on 'expensive' resistance heat. Attic insulation, air sealing and duct sealing routinely cut 15–30% of the load at a fraction of a system swap's price, and they pay off no matter which fuel wins your ranking.
The rational order of operations: seal and insulate first, then size the (now smaller) heating system for the improved house. Skipping to the shiny equipment quote hands the installer a bigger system than the fixed house needs — a double overpayment.
Combinations beat single answers
The cheapest real-world setups are hybrids: heat pump for the 80% of hours that are mild, cheap-fuel backup (gas, wood, pellets) for the deep cold; a wood stove zone-heating the living space through evenings while the whole-house system idles low; time-of-use electric plans running heat pumps hard in cheap windows.
Solar changes the electric story specifically: self-generated power makes heat pumps (and even resistance backup) cost whatever your amortized panel cost is — often the cheapest heat available anywhere the sun cooperates. If panels are in your future, weight the electric options accordingly today.
FAQ
What is the cheapest heating fuel right now?+
At national averages, natural gas and heat-pump electricity are effectively tied for cheapest delivered heat, followed by pellets and firewood; propane and oil cost meaningfully more, and electric resistance is the most expensive in almost every state.
Is wood heating cheaper than gas?+
Bought seasoned at typical prices, firewood lands close to gas but rarely beats it; free or self-harvested wood obviously wins. Pellets are usually slightly above gas and below oil/propane.
What's cheaper — improving insulation or a new heating system?+
Insulation and air sealing almost always deliver more savings per dollar: 15–30% load reduction for hundreds-to-low-thousands, versus efficiency gains of 10–20 points for many thousands on equipment.