Islamic Manual

Who must fast, and the conditions for it

Who fasting in Ramadan is obligatory on, the conditions for that obligation, and the two conditions a fast needs to be valid at all.

Farḍmust do

Fasting in the month of Ramadan is fard, an absolute must, on every Muslim who has grown up, has a sound mind, and (for girls and women) is not having their monthly period or bleeding after childbirth.

Fasting only becomes something you must do once you meet four conditions:

Four conditions for fasting to be required of you

  1. You are a Muslim.Fasting is not required of a non-Muslim.
  2. You have a sound mind.Someone who is not of sound mind does not have to fast.
  3. You have grown up (reached puberty).Fasting is not required of a child yet, but children should still practice fasting a bit, as much as they can manage, to get ready for when it becomes required.
  4. You are healthy and at home, not travelling.Someone sick or on a journey is excused for now.

Even once someone must fast, the fast itself only counts (is valid) if two more things are true: a woman or girl is not in her monthly period or the bleeding after childbirth, and the person made the intention to fast. If you just skip breakfast without meaning to fast, that doesn't count as fasting at all; you have to intend it in your heart.

Farḍmust do

Fasting in Ramadan is farḍ ʿayn, obligatory on every individual Muslim, who is sane, mature, and, in the case of women, not in menstruation or post-natal bleeding.

Conditions for fasting to be obligatory on a person
Condition Effect if absent
Being Muslim Fasting is not obligatory on a non-Muslim.
Being sane Fasting is not obligatory on someone who is insane.
Being mature (having reached puberty) Fasting is not obligatory on a child, though a minor should still be made to fast to the extent they are able, so as to build the habit.
Being healthy and resident (not travelling) Someone who is sick or travelling is exempted for the time being.

Beyond who is obligated to fast, two further conditions determine whether a given fast is valid at all: a woman must be free of menstruation and post-natal bleeding for that day, and the person must have made the intention (niyyah) to fast. Refraining from food and drink without an intention does not constitute a valid fast.

Farḍmust do

Ṣawm of Ramaḍān is farḍ ʿayn upon every mukallaf Muslim: sane ('āqil), mature (bāligh), and, for a woman, free of ḥayḍ or nifās for that day.

Ḥarāmmust not do

Denying the obligation of fasting removes a person from Islam. Deliberately breaking the fast without a legitimate excuse is a major sin, and such a person is a fāsiq, one openly disobedient to Allah.

Conditions of taklīf for the obligation of fasting
Condition Effect if absent
Islam Not obligatory on a non-Muslim (though a convert to Islam mid-Ramaḍān must observe the rest of the day, as covered under respect for Ramaḍān).
ʿAql (sanity) Not obligatory on the insane.
Bulūgh (maturity) Not obligatory on a minor, who should nonetheless be trained to fast according to capacity, per the earlier reports of the Salaf fasting their children.
Health and iqāmah (residence) The sick and the traveller are exempted for the duration of the excuse, subject to the rulings on qaḍāʾ set out under valid excuses.

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