How long are Broadway previews?

A Broadway production does not open on its first performance. It plays for weeks in front of paying audiences first, changing as it goes, and only then declares itself finished. That gap has a remarkably consistent length.

How long is a Broadway preview period?

24 days — about 3.4 weeks. That is the median across every Broadway production in our catalog that opened on or after 2010 and recorded both a first-preview date and an opening night.

The distribution is tight. The middle half of productions previewed between 19 and 28 days, a spread of about ten days. Run lengths vary by a factor of a hundred; preview periods barely vary at all.

The exception is famous. Spider-Man Turn Off the Dark previewed for 198 days before opening, pushing its opening night back repeatedly while the production was rewritten around it. Nothing else in the set comes close, and it remains the reference point for a preview period that has stopped being a schedule and started being a rescue.

Why does a show preview at all?

Because the only way to find out how a show plays is to play it. Laughs land in places nobody predicted, a scene that worked in the rehearsal room dies in a 1,400-seat house, and the second act turns out to be ten minutes too long. Previews are where that gets fixed, in front of an audience that has paid to be there.

The other reason is money. A production pays its full weekly running cost from the first preview onwards, so every extra preview week is a week of costs set against a discounted advance. Previews are expensive, which is exactly why they are short.

Do musicals preview longer than plays?

Yes, by about a working week. Musicals previewed a median of 27 days against 22 days for plays, across 172 musicals and 362 plays.

That is the one split in this data with an obvious mechanism behind it. Changing a musical means re-orchestrating, re-teaching choreography, and re-lighting a number; changing a play means new pages. The more machinery a change has to move through, the longer the period in which changes are still possible has to be.

Revivals and new productions, by contrast, are indistinguishable: a median of 24 days against 24 . Knowing the show already does not buy a production a shorter preview period — which is the same non-result revivals produce in how long a Broadway show runs.

Has the preview period got shorter?

Yes, by a few days. Productions opening in the 2010s previewed a median of 25 days across 353 productions. Productions opening in the 2020s previewed a median of 21 days across 190 .

The gap is 4 days — roughly half a week of performances, at a weekly running cost that reaches six figures for a large musical. It is a small number with a straightforward reading: the cheapest week to cut is the one before the critics arrive.

What happened to the shows caught by the 2020 shutdown?

6 productions in the catalog began previews before Broadway went dark on 12 March 2020 and did not reach an opening night until theatres reopened. The Minutes waited 782 days between its first preview and its opening — 2.1 years.

Those productions are excluded from every figure above, and not for tidiness. A number that large measures a public-health closure rather than a preview period, and leaving it in would set both the maximum and the share previewing longer than six weeks on the strength of six productions that spent most of that time not previewing at all.

Why measure days instead of performances?

Broadway counts previews in performances — “32 previews” is how a production describes itself in a press release. We count calendar days between the first preview and opening night, because the catalog records dates and not performance counts, and converting one into the other would mean assuming an unvarying eight-show week through holiday weeks, cancelled performances, and the weeks a production adds a ninth.

It is the same rule we apply to how long a Broadway show runs: report the unit the data actually holds.