An increasing number of German companies are planning to raise their prices, the Ifo economic institute said on Wednesday, adding that this likely meant inflation was not about to cool.

Ifo said its price expectations index for the coming months stood at 53.5 points in September, up from 48.1 in August.

"Unfortunately, this probably means the wave of inflation isn't about to subside," says Timo Wollmershaeuser, head of forecasts at ifo.

Those 'winter of discontent' vibes keep growing for Germany.