When one spouse in a married couple is not earning compensation, the couple may not be able to save as much as they need for a comfortable retirement. In general, an IRA contribution is allowed only if a taxpayer earns compensation. However, there’s an exception involving a “spousal” IRA. It allows contributions to be made for a spouse who is out of work or who stays home to care for children, elderly parents or for other reasons, as long as the couple files a joint tax return.