Unlike the regular IRA contribution rules, in which contributions are based on the individual's own compensation, the spousal IRA contribution rules allow lower compensated or non-compensated spouses to use their spouse's compensation when determining the IRA contribution limit. You can make a spousal contribution to your IRA if you are legally married, you file a joint federal income tax return, and the receiving spouse meets certain compensation requirements.
Spousal contributions are generally limited to 100% of earned income, up to $5,000 ($6,000 if age 50 or older) for tax year 2012.
Please consult with a tax adviser for more details.