The contribution limits for 401k, 403b and 457 retirement plans for 2011 will either remain unchanged from 2010 or increase slightly due to a small inflationary adjustment.

If you participate in a 401k, 403b or 457 plan, the elective deferral contribution remains unchanged at $16,500. If you are age 50 or over, the catch up contribution limit is $5,500.

If you are an active participant in an employer sponsored retirement plan and you are contributing to a traditional IRA, the  contribution to your IRA may or may not be deductible depending on your modified adjusted gross income. If you are single, the deduction is phased out if your modified adjusted gross income is between $56,000 and $66,000. This is the same as it was in 2010. If you are married and you file a joint tax return, the deduction is phased out if your modified adjusted gross income is between $90,000 and $110,000.

If you are not an active participant in an employer sponsored retirement plan and you are contributing to a traditional IRA, the contribution to your IRA may or may not be deductible depending on your modified adjusted gross income. If you are married to someone who is an active participant, the deduction is phased out if your modified adjusted gross income is between $169,000 and $179,000.

IRA contribution limits remain unchanged for 2011. The maximum annual IRA contribution is $5,000.

If you are making Roth IRA contributions, the adjusted gross income phase out range is $169,000 to $179,000 if you are married and you file a joint tax return with your spouse. If you are making contributions to a Roth IRA, the adjusted gross income phase out range is $107,000 to $122,000 if you are single.

Source: Internal Revenue Service, IR-2010-108

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