It Ain't Necessarily So by Bronsky Beat first appeared on the Israeli foreign-music chart on 20 Jan 1985, entering at #23. It peaked at #2 on 24 Feb 1985. In total it spent 9 weeks on the chart, last charting on 17 Mar 1985.
| Wk | Date | Pos |
|---|---|---|
| 1 | 20 Jan 1985 | 23 |
| 2 | 27 Jan 1985 | 19 |
| 3 | 3 Feb 1985 | 14 |
| 4 | 10 Feb 1985 | 10 |
| 5 | 17 Feb 1985 | 6 |
| 6 | 24 Feb 1985 | 2 |
| 7 | 3 Mar 1985 | 31 |
| 8 | 10 Mar 1985 | 20 |
| 9 | 17 Mar 1985 | 27 |