Is it cost effective to pay premium for the last 3 years of social security

First of all, retirement pensions are calculated based on the average amount of contributions made by the participant over the entire contribution period, not based on the amount of contributions made in a particular year alone. This means that even if one chooses to pay premium social security in the last three years, this will not significantly increase one's average contribution amount, and therefore will have a limited effect on one's pension entitlement.

Secondly, from a cost-effective point of view, choosing to pay premium social security in the last three years will bring financial pressure. If a higher contribution bracket is chosen for these three years, then the individual will need to pay more social security fees, and these extra costs will not be matched by a corresponding return in retirement.

So, from the two aspects mentioned above, it is not cost-effective to pay high-grade in the last three years of social security. For those who want to improve their retirement pension benefits, a more effective approach is to choose the appropriate contribution bracket throughout the contribution period and maintain a stable contribution record.