diff --git a/internal/topdata/wiki_native_test.go b/internal/topdata/wiki_native_test.go
index fcb7e7a..c478979 100644
--- a/internal/topdata/wiki_native_test.go
+++ b/internal/topdata/wiki_native_test.go
@@ -1740,6 +1740,57 @@ tables:
 	}
 }
 
+func TestWikiTemplateRendersClassProgressionSpellcastingAdvancementNotes(t *testing.T) {
+	ctx := testWikiTableContext(t, `
+tables:
+  ClassProgression:
+    source: class_progression
+    rows:
+      levels: 1-4
+    columns:
+      - key: level
+        label: Lvl
+        value: "{{Level}}"
+      - key: notes
+        label: Notes
+        value: "{{SpellcastingAdvancementNote + if(present(SpellcastingAdvancementNote) && present(Notes), \" \", \"\") + Notes}}"
+        empty: ""
+`)
+	page := wikiTemplatePage{
+		PageID:   "classes:pale_master",
+		Category: "classes",
+		Key:      "classes:pale_master",
+		Title:    "Pale Master",
+		Row: map[string]any{
+			"SpellCaster":    0,
+			"ArcSpellLvlMod": 2,
+			"DivSpellLvlMod": 0,
+			"meta": map[string]any{
+				"wiki": map[string]any{
+					"progression_notes": map[string]any{
+						"3": "Manual level note.",
+					},
+				},
+			},
+		},
+	}
+
+	got, err := ctx.renderWikiTemplateString("classes.html", `{{table:ClassProgression}}`, page)
+	if err != nil {
+		t.Fatalf("render table template: %v", err)
+	}
+	for _, expected := range []string{
+		`<tr><td>1</td><td>+1 level of existing arcane spellcasting class</td></tr>`,
+		`<tr><td>2</td><td></td></tr>`,
+		`<tr><td>3</td><td>+1 level of existing arcane spellcasting class Manual level note.</td></tr>`,
+		`<tr><td>4</td><td></td></tr>`,
+	} {
+		if !strings.Contains(got, expected) {
+			t.Fatalf("expected %q in rendered table:\n%s", expected, got)
+		}
+	}
+}
+
 func TestWikiTemplateHidesUnusedConfiguredClassSpellColumns(t *testing.T) {
 	ctx := testWikiTableContext(t, `
 tables:
diff --git a/internal/topdata/wiki_tables.go b/internal/topdata/wiki_tables.go
index 3c78c3b..4a6a184 100644
--- a/internal/topdata/wiki_tables.go
+++ b/internal/topdata/wiki_tables.go
@@ -452,6 +452,7 @@ func (ctx *wikiContext) classProgressionRows(levels string, projections map[stri
 		row["HasSpellProgression"] = hasSpellProgression(classRow)
 		row["HasSpellsPerDay"] = hasPerDay
 		row["HasSpellsKnown"] = hasKnown
+		row["SpellcastingAdvancementNote"] = classSpellcastingAdvancementNote(classRow, level)
 		populateClassSpellProgressionFields(row, "SpellsPerDay", spellsPerDayByLevel[level])
 		populateClassSpellProgressionFields(row, "SpellsKnown", spellsKnownByLevel[level])
 		out = append(out, row)
@@ -459,6 +460,35 @@ func (ctx *wikiContext) classProgressionRows(levels string, projections map[stri
 	return out, nil
 }
 
+func classSpellcastingAdvancementNote(classRow map[string]any, level int) string {
+	if level < 1 || isClassSpellcaster(classRow) {
+		return ""
+	}
+	notes := []string{}
+	if advancesSpellcastingAtLevel(classRow, "ArcSpellLvlMod", level) {
+		notes = append(notes, "+1 level of existing arcane spellcasting class")
+	}
+	if advancesSpellcastingAtLevel(classRow, "DivSpellLvlMod", level) {
+		notes = append(notes, "+1 level of existing divine spellcasting class")
+	}
+	return strings.Join(notes, "; ")
+}
+
+func advancesSpellcastingAtLevel(classRow map[string]any, field string, level int) bool {
+	mod, err := asInt(fieldValue(classRow, field))
+	if err != nil || mod <= 0 {
+		return false
+	}
+	return roundedSpellcastingLevelAdvancement(level, mod) > roundedSpellcastingLevelAdvancement(level-1, mod)
+}
+
+func roundedSpellcastingLevelAdvancement(level, mod int) int {
+	if level <= 0 || mod <= 0 {
+		return 0
+	}
+	return (level*2 + mod) / (mod * 2)
+}
+
 func (ctx *wikiContext) classProgressionNote(classRow map[string]any, level int) string {
 	meta, err := parseExistingMetadata(classRow)
 	if err != nil || meta == nil {