SSA Updates Social Security Taxable Wage Base for 2018

By Joshua A. Diveley

In October, the Social Security Administration (SSA) announced an adjustment to the Social Security taxable wage base to take effect in January based on an increase in average wages. Based on the wage data Social Security had as of October 13, 2017, the Social Security taxable wage base was set to increase to $128,700 in 2018, from $127,200 in 2017. Based on newly released data obtained by SSA, the new Social Security taxable wage base for 2018 is $128,400.

This lower taxable amount is due to corrected W2s provided to Social Security in late October 2017 by a national payroll service provider. Approximately 500,000 corrections for W2s from 2016 were received by SSA and resulted in the downward adjustment for 2018.

For more information about the updated 2018 taxable maximum amount, please visit


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