I have great information for you! Because you are now beyond the social security full retirement age of 66, you may work and earn as much as you want and it will not effect your social security benefit in the least. The income limitation that social security has only applies to people who are under full retirement age and who are both receiving a social security early retirement benefit and working for income.
You are all set. You may take the per diem job and still collect your full social security benefit.
While it does not apply to you, I will provide you the information you asked about as regards ***** ***** social security benefits.
If you are under full retirement age for the entire year, social security will deduct $1 from your benefit payments for every $2 you earn above the annual limit. For 2016, that limit is $15,720.
In the year you reach full retirement age, social security will deduct $1 in benefits for every $3 you earn above a different limit. In 2016, the limit on your earnings is $41,880 but they only count earnings before the month you reach your full retirement age.
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I wish you and yours the best in 2016,