Contribution limits are based on your Modified Adjusted Gross Income (MAGI).
Generally, individual annual contributions are limited to 100% of earned income, up to $5,000 ($6,000 if age 50 or older) for tax year 2011.
Spousal Contributions are allowed if married and filing jointly, are generally limited to 100% of earned income, up to $5,000 ($6,000 if age 50 or older) for tax year 2011.
To be eligible to make the full $5,000 ($6,000 if age 50 or older) contribution to a Roth IRA, your Modified Adjusted Gross Income (MAGI) must fall within a certain range.
To find the exact contribution you are eligible for, please see the MAGI for Roth IRA Contribution Limits.
Beginning in 2010, the Modified Adjusted Gross Income (MAGI) and filing status requirements for converting a traditional IRA to a Roth IRA are eliminated. Also, for any 2010 rollovers from an IRA other than a Roth IRA to Roth IRA, any amounts that would be included as income will be included in income in equal amounts in 2011 and 2012, or you can choose to include the entire amount in income in 2010.