Tana French has never published a strict daily schedule: no fixed wake time, no word count target. What she has described, across interviews, is the shape of how the work actually happens.

The Direct Answer
There's no documented clock-time routine. What is documented is how the work started, and how she still approaches structure.
She wrote In the Woods in the gaps between acting jobs, over roughly two years, before turning down further roles to finish it.

Built in Stolen Time

Before she was a novelist, French worked for about a decade as a professional actor, trained at Trinity College Dublin, taking roles in theatre, film, and voiceover. The idea for In the Woods came to her during a summer job on an archaeological dig near a wooded site, a day job she was doing between acting gigs in her early 30s. By her own account, she worked on the book, on paper, in the lulls between castings for close to two years.

I was actually turning down acting work to finish this thing.

Tana French, Irish Times, 2024

That line, from a 2024 Irish Times interview, is the closest thing she's given to a marker of when writing stopped being a side project. Actors don't turn down paid work lightly. Once she started doing it regularly, the novel had become the priority, without a contract or a deadline forcing the decision.

No Fixed Structure, Even Now

That original, schedule-free way of working seems to have stuck. In the same interview, French said structure 'doesn't come easily' to her, that she's 'not one of those people who will naturally see the arc' of a book in advance. She's described being 'extremely jealous' of writers who have every chapter plotted before they start, because they carry a certainty about the shape of the story she says she's never had. Her output follows the pace of discovery drafting rather than a calendar: her novels have arrived anywhere from about one to four years apart since In the Woods came out in 2007, a gap that tracks with how much rewriting each book demanded.

See the full Tana French writing routine for how that process connects to her acting background and Dublin settings.

What You Can Steal