Depends on the context; if you are presently using x kWh of electricity for non-heating plus 2x kWh of gas for heating, your options for electrical heating are either to 3x your electricity demand by "upgrading" to resistive, or 1.5x (or whatever) your demand by upgrading to a heatpump.

There's other stuff you can also do, but costs are all over the place, e.g. my 110 ish sqm house in Berlin is so well insulated (and has heat pump) that even while it's snowing outside it's hot enough indoors to be naked, for an electricity bill that's lower than that of my 37 square meter apartment in the UK, despite German electricity prices being much higher.