This number is more or less the same in Norway as well for air-to-air pumps without subsidies. Keep in mind that oil/gas heating and such is not normal, we've used electricity and firewood for heating for the most part. So replacing electric heaters with a heat pump will drastically reduce electricity costs, improve air quality and improve heating. Really a no brainer.

Ok that makes sense then. Most people here will compare against an existing gas or oil heating installation I guess...

That's what news articles and the companies installing heat pumps have been saying since ~2005. Had those estimates been substantially wrong, we'd know it by now.

The only subsidy is the deduction for hiring household help. If you hire outside help for any purpose, you get a tax deduction based on the wages you pay.