The MaxMySocialSecurity calculations show that my spouse should file when she turns 64 and since I qualify to use the restricted application option (turned 62 before December 2015) that I should restrict my application to the spousal benefit when I turn 66 (same year she turns 64) and then switch to my benefit at 70. What I am not clear on is whether I receive 1/2 of her projected FRA (66 year old) benefit or 1/2 of her reduced benefit which is approximately 13% lower than her FRA benefit.

Hi,

Your spousal benefits will be unreduced (i.e. equal to 50% of your wife's full retirement age rate) since you will be starting them at your full retirement age. The fact that your wife will not be full retirement age when she starts her benefits is irrelevant to the computation of your spousal benefit rate.

Best, Jerry