diff --git a/docs/views/default-base-templates.md b/docs/views/default-base-templates.md
index 2be3d48e..d04a9065 100644
--- a/docs/views/default-base-templates.md
+++ b/docs/views/default-base-templates.md
@@ -64,7 +64,7 @@ These formulas return string values useful for grouping tasks in views:
 | `scheduledMonth` | Scheduled date as year-month | "2025-01", "Not scheduled" | `if(scheduled, date(scheduled).format("YYYY-MM"), "Not scheduled")` |
 | `scheduledWeek` | Scheduled date as year-week | "2025-W01", "Not scheduled" | `if(scheduled, date(scheduled).format("YYYY-[W]WW"), "Not scheduled")` |
 | `dueDateCategory` | Human-readable due date bucket | "Overdue", "Today", "Tomorrow", "This week", "Later", "No due date" | `if(!due, "No due date", if(date(due) < today(), "Overdue", if(date(due).date() == today(), "Today", if(date(due).date() == today() + "1d", "Tomorrow", if(date(due) <= today() + "7d", "This week", "Later")))))` |
-| `timeEstimateCategory` | Task size by time estimate | "No estimate", "Quick (<30m)", "Medium (30m-2h)", "Long (>2h)" | `if(!timeEstimate \|\| timeEstimate == 0, "No estimate", if(timeEstimate < 30, "Quick (<30m)", if(timeEstimate <= 120, "Medium (30m-2h)", "Long (>2h)")))` |
+| `timeEstimateCategory` | Task size by time estimate | "No estimate", "Quick (<30m)", "Medium (30m-2h)", "Long (>2h)" | `if(timeEstimate > 0, if(timeEstimate < 30, "Quick (<30m)", if(timeEstimate <= 120, "Medium (30m-2h)", "Long (>2h)")), "No estimate")` |
 | `ageCategory` | Task age bucket | "Today", "This week", "This month", "Older" | `if(((number(now()) - number(file.ctime)) / 86400000) < 1, "Today", if(((number(now()) - number(file.ctime)) / 86400000) < 7, "This week", if(((number(now()) - number(file.ctime)) / 86400000) < 30, "This month", "Older")))` |
 | `createdMonth` | Creation date as year-month | "2025-01" | `file.ctime.format("YYYY-MM")` |
 | `modifiedMonth` | Last modified date as year-month | "2025-01" | `file.mtime.format("YYYY-MM")` |
diff --git a/src/templates/defaultBasesFiles.ts b/src/templates/defaultBasesFiles.ts
index 8b2d17ed..565ac75d 100644
--- a/src/templates/defaultBasesFiles.ts
+++ b/src/templates/defaultBasesFiles.ts
@@ -318,7 +318,7 @@ function generateAllFormulas(plugin: TaskNotesPlugin): Record<string, string> {
 		dueDateCategory: `if(!${dueProperty}, "No due date", if(date(${dueProperty}) < today(), "Overdue", if(date(${dueProperty}).date() == today(), "Today", if(date(${dueProperty}).date() == today() + "1d", "Tomorrow", if(date(${dueProperty}) <= today() + "7d", "This week", "Later")))))`,
 
 		// Time estimate category for grouping
-		timeEstimateCategory: `if(!${timeEstimateProperty} || ${timeEstimateProperty} == 0, "No estimate", if(${timeEstimateProperty} < 30, "Quick (<30m)", if(${timeEstimateProperty} <= 120, "Medium (30m-2h)", "Long (>2h)")))`,
+		timeEstimateCategory: `if(${timeEstimateProperty} > 0, if(${timeEstimateProperty} < 30, "Quick (<30m)", if(${timeEstimateProperty} <= 120, "Medium (30m-2h)", "Long (>2h)")), "No estimate")`,
 
 		// Age category based on creation date
 		ageCategory: 'if(((number(now()) - number(file.ctime)) / 86400000) < 1, "Today", if(((number(now()) - number(file.ctime)) / 86400000) < 7, "This week", if(((number(now()) - number(file.ctime)) / 86400000) < 30, "This month", "Older")))',