Can I work on Tisha b’av

Working on Tisha b'Av (the Ninth of Av) is governed by local custom (minhag), but universally, Torah scholars refrain from work the entire day, and anyone who does work is unlikely to see blessing from it. The general ruling is that in most communities today, the custom is not to work on Tisha b'Av, and this practice is strongly encouraged for everyone.

Key Takeaways

Work on Tisha b'Av follows local custom (minhag hamakom) — where the custom is not to work, one may not work.
Torah scholars universally refrain from work on Tisha b'Av, regardless of local custom.
Anyone can adopt the practice of a Torah scholar and refrain from work, even where the local custom permits it.
Work done through a non-Jew (goy) is permitted even in places where the custom is not to work.
A spiritual warning exists: one who does work on Tisha b'Av will not see blessing (bracha) from that work.

Detailed Answer

The Basic Rule: Local Custom Governs

The Mishnah establishes the foundational principle:

"In a place where it was the custom to work on Tisha b'Av, they work. In a place where it was the custom not to work, they do not work." [Mishnah Pesachim 4:5]

This means the halacha is not a blanket prohibition — it depends on minhag (established community custom). Historically, some communities worked on Tisha b'Av, while others did not.

The Universal Standard: Torah Scholars Refrain

However, the Mishnah immediately adds an important qualifier:

"And in every place, Torah scholars are idle [from work] the entire day, so that they not take their minds off the mourning." [Mishnah Pesachim 4:5]

Rabban Shimon ben Gamliel adds that anyone who wants to adopt the practice of a Torah scholar — refraining from work — may do so, and it does not appear ostentatious.

The Shulchan Arukh codifies this exactly:

"In all places, Torah scholars (Talmidei Chachamim) are idle, and all who want to make themselves like a Torah scholar regarding this matter, one can do so." [Shulchan Arukh, Orach Chayim 554:22]

Work Through a Non-Jew

The Shulchan Arukh [OC 554:22] adds a leniency: even in a place where the custom is not to work, it is permitted to have the work done through a non-Jew, even in one's own home. This is a recognized leniency for situations of significant financial need.

Business for Profit or Wages

The Shulchan Arukh [OC 554:22] is strict on one point: doing business for profit or wages in a place where the custom is not to work is forbidden — not merely discouraged.

The Spiritual Warning

Perhaps the strongest deterrent is this ruling:

"All who do work on Tisha b'Av will not see a sign of blessing (siman beracha) from that work." [Shulchan Arukh, Orach Chayim 554:24]

This is not merely a chumra (stringency) — it is a formal halachic statement recorded in the Shulchan Arukh itself, reflecting the gravity of the day.

Why Is This Day So Serious?

The Mishnah Ta'anit [4:6] records five catastrophes that occurred on Tisha b'Av:

The decree that the generation of the desert would not enter the Land of Israel
The destruction of the First Temple
The destruction of the Second Temple
The fall of Beitar (Bar Kokhba's last stronghold)
The plowing over of Jerusalem

The prophet Zechariah [8:19] refers to the fast of the fifth month (Tisha b'Av) as one that will ultimately be transformed into joy — but only in the messianic era. Until then, the day demands full mourning.

Practical Bottom Line

In most Jewish communities today — both Ashkenazic and Sephardic — the accepted custom is not to work on Tisha b'Av. Given the spiritual warning in the Shulchan Arukh and the universal standard of Torah scholars, refraining from work is the strongly recommended practice for everyone.

For personal guidance, consult your local rabbi or posek.