The state ferry system’s annual peak-season surcharge goes into effect Monday.

The surcharge will increase fares for vehicles on all routes by 25%, except for vehicles traveling from Anacortes to Lopez, Shaw and Orcas islands, as well as Friday Harbor on San Juan Island. Those fares will increase by 35%.

For example, the Seattle/Bainbridge Island route will see an increase of $4.20 for a car and driver, said Ian Sterling, a Washington State Ferries spokesperson.

The surcharge applies to single vehicles crossing Puget Sound but does not affect passenger or multi-ride fares.

The peak-season pricing will continue through September, covering the busiest months of the year for ferry travel.