Social Security: What's the Maximum I Can Get if I Claim at 65?

It used to be that Americans retired at age 65 because that's when they qualified for 100% of their monthly Social Security benefit. Nowadays, workers have to wait longer to reach full retirement age, but old habits die hard and retiring at age 65 is still common. If you're among those who are still targeting a retirement at age 65, then here's what you ought to know so you don't collect less in Social Security than you expect.