My spouse has little/no income. Can I contribute to my spouse's IRA?
Yes. You may make a Traditional IRA contribution to your spouse's Traditional IRA because you have eligible compensation.
There is no income limit for contributing to a Traditional IRA. However, although your income does not prevent you from making a Traditional IRA contribution, it may make you ineligible to take a deduction for Traditional IRA contribution, or from making a Roth IRA contribution.
To learn more, read Making Spousal IRA Contributions.