Couples consisting of an eligible and a non-eligible spouse cannot make Aliyah separately. This is because the non-eligible spouse is not eligible for Aliyah on his own. Therefore, if the non-eligible spouse does not make Aliyah together with their eligible spouse, they cannot make Aliyah at a later stage at all.
If one spouse is converted to Judaism and the other spouse is eligible by birth, it is not recommended to make split Aliyah. The Aliyah approval rules for converts change in accordance with the validity status of the Rabbinical Court, thus, it is not recommended that the converted spouse make Aliyah after their spouse.
If two groups within the same family make Aliyah separately in an interval of less than 1 year, there will be changes in the benefits granted to the second group because Sal Klita is calculated per family unit.
For example (All values here are figurative only), if a family makes Aliyah together, the family is entitled to a monthly Sal Klita of 5,000 NIS. If the same family is divided into two groups and makes Aliyah separately, the first group will receive a monthly Sal Klita of 4,000 NIS and the second group will receive only the rest, in this case 1,000 NIS
The split Aliyah process requires the submission of an additional form in which both spouses declare they are aware of the effects of the split Aliyah.