According to https://www.americanprogress.org/issues/immigration/reports/2012/07/06/11888/the-facts-on-immigration-today/ https://www.americanprogress.org/issue

According to https://www.americanprogress.org/issues/immigration/reports/2012/07/06/11888/the-facts-on-immigration-today/ https://www.americanprogress.org/issues/immigration/reports/... it's 285bn USD over 5 years to deport them, and GDP would decrease by 1.45% over 10 years without undocumented/illegal immigrant participation (i.e. 0.145% drag every year---assuming this includes the relevant GDP multipliers).