Roll Up Subitem Time Tracking to the Parent Item in monday.com (2026)

Direct answer: monday.com can display subitem tracked time on the parent (enable “Show summary on parent item” on the subitem Time Tracking column), but that summary is a mirror. You can’t bill from it or chart it, and automations can’t see it. To get total tracked time as a real number, roll it up with SubItems Pro’s SUM_TRACKED function into a Numbers column: decimal hours, auto-updated, completed sessions only.

What does monday.com show natively for subitem time tracking?

Start with the free option. As of mid-2026, the subitem Time Tracking column supports the same Show summary on parent item option as other subitem columns (via the column’s menu), and the parent then displays a summary of time tracked across its subitems. If you just want to glance at where the hours went, enable it and stop reading.

Where it stops (the same wall every subitem summary hits):

• It’s a mirror-type display, not a stored value. Formula columns can’t read it, automations can’t trigger on it, and exports and many dashboard widgets treat it as empty. (The mechanics are explained in why the subitem summary column doesn’t work in automations.)
• There’s no decimal number to multiply by an hourly rate, compare to an estimate, or sort by.
• It’s all-or-nothing: every subitem’s time counts. You can’t separate billable from internal time.

If any of those matter (invoicing, capacity reports, budget alerts), you need the total in a real column.

How do I roll tracked time up into a real column?

SubItems Pro’s Rollup Sync writes subitem aggregates into normal parent columns:

1. Add the Rollup Sync board view to your board and authorize it once.
2. Add a Numbers column on the parent board — call it “Tracked (h)”.
3. Create a rule: source = subitem Time Tracking column, function = SUM_TRACKED, target = “Tracked (h)”.
4. Enable auto-sync and save.

The parent now shows total tracked time in decimal hours: 7.5 means 7 hours 30 minutes. It updates via webhooks as subitems log time. Sync now recalculates on demand, and syncs are unlimited on every plan (they never consume plan actions).

Two behaviors worth knowing before you trust the number:

• Completed sessions only. A timer that’s still running contributes nothing until it’s stopped; the session is added to the total once it ends. Mid-day numbers run slightly low as a result.
• Decimal output is what makes the number usable. A plain number works in a formula (Tracked (h) × rate), in a dashboard chart, and in an exported spreadsheet. A 7h 30m display string does none of that.

AVG_TRACKED works the same way but averages across subitems that have tracked time (never-tracked subitems don’t drag the average down). Useful for average handling time per subtask when items represent repeatable work.

How do I sum only billable hours?

Total tracked time and billable tracked time are rarely the same number, and invoicing off the wrong one is expensive. Give each subitem a Status column, say “Billing” with labels Billable / Internal, then add a filter to the rollup rule:

• Rule: Time Tracking → SUM_TRACKED → Numbers “Billable (h)”, filter: Billing is Billable.

Only subitems marked Billable count toward the total. Subitems whose Billing status is unset are excluded. That’s the right default for invoicing: untagged time never sneaks onto a client bill. Filters are available on any paid plan (from Basic, $8/month flat); the full pattern, with more worked examples, is in filtered subitem rollups.

What if hours are entered manually instead of tracked?

Plenty of teams never start a timer. They type hours into an Hour column on each subitem, or import them from another system. The rollup works the same way with a different function:

• Rule: Hour → SUM_HOURS → Numbers on the parent.

AVG_HOURS gives the per-subitem average. Both output decimal hours, so a board can mix approaches (timers on one group of boards, manual entry on another) and the parent columns stay comparable.

Which function do I need?

Function	Source column	Output (parent)	Notes
SUM_TRACKED	Time Tracking	Numbers, decimal hours	Completed sessions only
AVG_TRACKED	Time Tracking	Numbers, decimal hours	Average per tracked subitem
SUM_HOURS	Hour	Numbers, decimal hours	For manually entered time
AVG_HOURS	Hour	Numbers, decimal hours	Average per subitem

All four functions are free on every plan, including the free tier (1 board, 1 rule), so you can verify the totals against a week of your own timesheets before paying anything. Time Tracking rollup is uncommon among rollup apps, so if you’re comparing options, check the supported-column list first — our rollup app comparison covers who supports what, and the complete rollup guide maps every function. Setup details live in the user guide.