IRA contributions allowed over age 72 for married retired couples

Q. What is the limit on contributions to IRA account (for possible deduction) if over age 72, married, but neither spouse is working?

A. $0. 

For anyone over age 50, the normal limit is $7000.  But, the actual wording is: 

For 2022, 2021, 2020 and 2019, the total contributions you make each year to all of your traditional IRAs  and Roth IRAs can't be more than:

• $6,000 ($7,000 if you're age 50 or older), or
•  your taxable compensation for the year*

To contribute to a traditional IRA or Roth IRA, you, and/or your spouse if you file a joint return, must have taxable compensation, such as wages, salaries, commissions, tips, bonuses, or net income from self-employment.

*If you file a joint return, you may be able to contribute to an IRA even if you didn’t have taxable compensation as long as your spouse did. Each spouse can make a contribution up to the current limit; however, the total of your combined contributions can’t be more than the taxable compensation reported on your joint return. 

References:

https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-ira-contribution-limits#:~:text=IRA%20contributions%20after%20age%2070%C2%BD,to%20traditional%20or%20Roth%20IRAs.

https://www.irs.gov/taxtopics/tc451#:~:text=To%20contribute%20to%20a%20traditional,net%20income%20from%20self%2Demployment.