Hearing at least 10 Kaddeishim daily:

A. The law and custom:[1]

The obligatory seven daily Kadeishim upon the Minyan:[2] The Sages instituted to recite at least seven Kadeishim per day, corresponding to the verse[3], “Sheva Bayom Hilalticha/seven in a day I will praise you.” These seven Kadeishim are an actual obligation upon a congregation when Davening with a Minyan, while the remaining Kadeishim are simply said due to custom.

Hearing ten Kadeishim per day:[4] Despite this, [based on the Zohar] it is proper for every individual to be careful to answer [Amen] to at least 10 Kadeishim daily.[5] [The novelty of this ruling is that although the sages only instituted for seven Kadeishim to be recited per day and placed the obligation only upon the congregation and not the individual, nonetheless, based on Kabbalah it is proper for every individual to try to hear 10 Kadeishim per day.]

B. The number of Kadeishim in each prayer:

In Shacharis, by Chabad Minyanim, there is a total of nine Kaddeishim on days without Kerias Hatorah, and ten Kaddeishim on a day with Kerias Hatorah. Although some of these Kaddeishim are designated to be said by mourners, and are known as Kaddish Yasom, nonetheless, due to the above need to hear 10 Kaddeishim a day, they should be said by anyone whose parents are not alive even though they are not a Yasom/Chiyuv.[6] In Mincha, by Chabad Minyanim with an Avel, there is a total of four Kaddeishim. In Maariv, by Chabad Minyanim with an Avel, there is a total of five Kaddeishim.

The Kaddeishim in Shacharis:

1. Before Hodu
2. After Yishtabach[7] [part of obligatory seven]
3. After Tachanun/Shemoneh Esrei[8] [part of obligatory seven]
4. After Kerias Hatorah on Mondays and Thursdays
5. After Uva Letziyon[9] [part of obligatory seven]
6. After Shir Shel Yom [Kaddish Yasom]
7. After Ein Kelokeinu
8. After Aleinu [Kaddish Yasom]
9. After Tehillim [Kaddish Yasom]
10. After Mishnayos

The Kaddeishim in Mincha:

1. After Ashreiy[10] [part of obligatory seven]
2. After Tachanun/Shemoneh Esrei[11] [part of obligatory seven]
3. After Aleinu [Kaddish Yasom]
4. After Mishnayos

The Kaddeishim in Maariv:

1. Before Maariv
2. Before Shemoneh Esrei[12] [part of obligatory seven]
3. After Shemoneh Esrei[13] [part of obligatory seven]
4. After Aleinu [Kaddish Yasom]
5. After Mishnayos

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[1] See Admur 55:1

[2] Admur 55:1; Iggur 94; Shibulei Haleket 8 in name of Geonim; Beis Yosef 55; Perisha 55:1; Kaf Hachaim 55:1

[3] Tehillim 119:164

[4] Admur 55:1; Tikkunei Zohar 33a; Reishis Chochmah Shaar Hakedusha 17; Igros Kodesh 10:302; 14:188; Piskeiy Teshuvos 46:7

[5] The reason: As this is part of the acronym of Tzadik, 90 Amenin, 4 Kedushos, 10 Kaddeishim, and 100 blessings. [Reishis Chochmah ibid]

[6] See Rama 132:2, Y.D. 376:4; Igros Kodesh 10:302

[7] Admur ibid; Michaber 55:1

[8] Admur ibid; Tur 131:1; Siddur Rav Amram

[9] Admur ibid; Tur 132:1; Siddur Rav Amram; Levush 132:2

[10] Admur ibid; Tur 234:1; Siddur Rav Amram; Levush 234:2

[11] Admur ibid; Tur 234:1; Siddur Rav Amram; Levush 234:2

[12] Admur ibid; Tur 236:2; Siddur Rav Amram; Levush 236:2

[13] Admur ibid; Tur 237:2; Siddur Rav Amram; Levush 236:2

[14] See Igros Kodesh 10:303

[15] Implication of Admur ibid who lists the Maariv Kadeishim as the last part of the seven daily Kadeishim; Unlike the ruling by Meiah Brachos that the night is the start of the next days count [see Admur 46:1]