The rise follows the trend in recent years of increased prices for vehicles of all types to cross the Severn.
According to the Severn River Crossing PLC (SRC) the increases are stipulated in the 1992 Severn Bridges Act and adjusted by the Retail Price Index, which was published last month.
The Severn crossings - and the fact you need to pay to cross them - make Wales 'seem like a strange place' says one business leader.
Mike Plaut from the Confederation of British Industry says the tolls are 'bad PR' for Wales.
The new, increased toll prices for vehicles crossing the Severn Bridge will be introduced from tomorrow onwards.
The new, increased toll prices for vehicles crossing the Severn Bridge will be introduced from tomorrow onwards.