Waiting to claim Social Security can pay off, but there is a point when waiting longer stops helping. The Social Security Administration explains that retirement benefits increase when you delay them beyond full retirement age, with delayed retirement credits ending at age 70. That means someone who has reached 70 generally has no financial incentive to keep postponing an application simply to earn a larger age-based benefit. Yet treating 70 as the finish line for retirement planning can be an expensive mistake because taxes, Medicare premiums, required withdrawals, investment decisions, and even future Social Security calculations can continue changing. These retirement decisions after age 70 deserve attention even after delayed retirement credits have stopped.