As a result of the American Taxpayer Relief Act of 2012, the IRS has released additional annual inflation adjustments and other tax changes for tax year 2013.
Qualified transportation benefits - monthly transit and parking limits for 2013
For the 2013 tax year, the monthly limit for transit passes and transportation in a commuter vehicle is $245, up from $240 in 2012.
Parking has also increased to $245, up from $240 in 2012.
Details are in Revenue Procedure 2013-15, available at http://www.irs.gov/pub/irs-drop/rp-13-15.pdf