What is the percentage of wages withheld from employee paychecks to fund Social Security?

$1\mathrm{.}45\%$ with no ceiling.

$6\mathrm{.}2\%$ on the first $$142,800$ of wages; above that the contribution rate is $10\%.$

$6\mathrm{.}2\%$ on the first $$142,800$ of wages; above that the contribution rate is $0\%.$

$1\mathrm{.}45\%$ on the first $$142,800$ of wages; above that the contribution rate is $0\%.$