Final answer:
Spouses can contribute up to $5,500 annually to an IRA, or $6,500 if they're 50 or older, which applies to both traditional and Roth IRAs combined.
Step-by-step explanation:
For spouses looking to contribute to an Individual Retirement Account (IRA), the annual contribution limit for 2014 and 2015 is up to $5,500, or $6,500 if you're age 50 or older.
It's important to note that these figures can change as tax laws are updated annually. Contributions can be made to both traditional and Roth IRAs, but the combined limit applies across all accounts. For those planning for retirement, IRAs are a crucial tool for tax-sheltered savings.