From today, National Express West Midlands services will increase by 10p.
Fuel prices and other business costs have been blamed by the company, which runs the majority of the region's buses.
However, it said the rise will allow it to support the introduction of "smartcards" in 2013, which will let passengers pre-pay for their travel and potentially allow it to offer savings.
- Daysavers will rise by 10p from £3.80 to £3.90 for adults.
- Daysavers will rise by 10p from £2.60 to £2.70 for children.
- Travelcards will rise by 50p a week.
- West Midlands monthly Travelcards will rise from £54 to £55.50 (or from £48 to £49.50 if bought by direct debit).
- Black Country Travelcards will rise from £13.50 to £14 for weekly passes.
- Black Country Travelcards will rise from £47.50 to £49 for monthly ones (or from £42 to £43.50 if bought by direct debit).
- All other fares will stay the same.