Former substitute teacher Mbu Walters, who retired in April 2018, saved $21,609 toward a pension over 10 years working for public schools, Chicago Teachers' Pension Fund records show.

Over 30 years of retirement, Walters would collect as much as $245,511, according to a projection by Local Government Information Services (LGIS), which publishes Chicago City Wire.

The projection assumes Walters received $5,160 in the first year of retirement, then 3 percent annual increases thereafter, compounded.

After 5 years of retirement, Walters will have already received $27,394 in retirement benefits, or more than the sum total of the retiree's contributions to the teachers' pension fund.