Assuming no other compensation, your combined IRA contributions cannot exceed your net profit minus the deductible portion of self-employment taxes. For a net profit of exactly $3,000, that would be $2,788. Because your wife has no compensation, an IRA contribution made by her is permissible and would be a spousal contribution based on your compensation. In other words, your maximum contribution is $2,788 and your wife's maximum contribution is $2,788 minus your contribution.
