The study examines, from an economical perspective, the role power-to-gas (PtG) technologies may play in interlinking various sectors (namely electricity, heat and transport). The use of PtG technologies is analyzed for a wide range of applications including chemical storage, PtG in the industrial sector, the (potential) reduction of extensions in the high-voltage grid, power to heat (PtH) in the heating sector and power-to-gas-to-liquid (PtGtL) fuels for road transport.