My friend is past her full retirement age and has been receiving both SS benefits and earned income for several years. Last year her benefit was increased by a small amount as a result, but this year it was not. She has high income now, but has many years of low income in the past. How can I check whether her current benefit is correct? There are many SS benefit calculators out there, but few that implement that level of detail.
I’m not aware of such a calculator, or a set of instructions that would allow you to check this result. Be aware, however, that a year of higher earnings won’t necessarily replace a year of lower earnings in the calculation because the lower earnings in the past are adjusted for the passage of time. See the following article, particularly under the heading “Replacing Years of Low Earnings.”