Cloud condensation nuclei (CCN) links atmospheric aerosol particles to cloud droplet formation, yet the electrical charge carried by these particles is not represented in aerosol-cloud models. Previous studies linking ionisation to CCN have focused on ion-induced particle production and found small effects. Here we test whether charge instead modifies particle survival and redistribution during growth to cloud-active sizes. Using the charge- and size-resolved ELSA-ICAM box model, we perform matched neutral and charged simulations in two regimes: a polluted urban regime dominated by sulfuric acid-dimethylamine nucleation and a clean boreal regime dominated by biogenic highly oxygenated organic molecule nucleation. In the polluted regime, bipolar charging reduces total particle number by 3.1 % relative to the neutral case at 72 h while increasing CCN at 0.2 % supersaturation by 2.5 %. By 120 h, the number response reverses to +4.1 % and the CCN enhancement increases to +5.8 %. In the clean regime, the charge-resolved case increases CCN by +8.9 % at 120 h relative to the neutral case. Process attribution shows that charge-dependent coagulation is the largest shared contribution, increasing CCN by +5.8 % in polluted air and +5.3 % in clean air through size-selective survival and redistribution. Ion-induced nucleation is negligible in polluted air but contributes an additional +3.6 % to CCN in clean air, despite producing a larger increase in particle number. The CCN response is therefore less sensitive to ion production than particle production. These results identify charge-regulated aerosol survival as a microphysical pathway linking atmospheric ionisation to CCN.