Is it a sin not to fast in Ramadan without an excuse?

Detailed answer

Yes. For every adult Muslim who is healthy and not travelling, fasting the month of Ramadan is an obligation, not a personal preference. Leaving it without a valid excuse is considered one of the major sins. The good news is that the way back is always open: repent, make up the missed days and start fasting.

What the Quran and Sunnah say

Allah says: "So whoever among you witnesses the month, let him fast it" (Al-Baqarah 2:185). The Prophet, peace be upon him, said that Islam is built on five pillars, and he named fasting Ramadan among them (Bukhari and Muslim). Read more about fasting as a pillar of Islam.

Scholars draw a clear line between two people. Someone who believes fasting is obligatory but neglects it out of weakness is committing a major sin. Someone who denies that Ramadan fasting is obligatory at all is in a much more serious position, because this rejects a clear and agreed part of the religion.

Who is excused?

Not everyone who skips a fast is sinning. The Quran itself excuses the sick and travellers (Al-Baqarah 2:184–185). Women during their period or bleeding after childbirth must not fast, and pregnant or breastfeeding women, the elderly and the chronically ill have their own rules. See who has to fast in Ramadan.

What to do if you have missed Ramadans

• Sincerely repent to Allah and resolve to fast from now on.
• Make up every day missed after puberty. See how to make up missed fasts.
• If you need practice, fast a few voluntary days before Ramadan to get used to it.

A gentle word

Fasting can feel hard at first, especially without support around you. Many people find that once they begin, the month brings a calm and a closeness to Allah they did not expect. Find a mosque or a friend to break the fast with, eat a good suhoor and take it one day at a time. And if you see others not fasting, remember that their excuse may be hidden: give advice kindly and privately, never with harsh judgement.