diff --git a/src/ccma/assets/CHANGELOG.json b/src/ccma/assets/CHANGELOG.json
index c96f639..93e6a37 100644
--- a/src/ccma/assets/CHANGELOG.json
+++ b/src/ccma/assets/CHANGELOG.json
@@ -23,7 +23,8 @@
       "Ein Akten-Preflight sperrt bei beschädigten Mitglieder-, Beitrags- oder Eventdateien alle Regeln für die betroffene Akte.",
       "Der Hausmeister-Tab zeigt den vollständigen Inhalt eines markierten Vorgangs in einem mehrzeiligen Detailbereich.",
       "Hausmeister-Tasks lassen sich manuell löschen; Einträge entfernter Mitgliederakten werden beim nächsten Lauf bereinigt.",
-      "Forderungen besitzen eigene Tabs mit Positionen, Teilzahlungen, GnuCash-Referenzen, Zahlungszuordnungen, Mahnungen und Gebühren.",
+      "Forderungen besitzen eigene Arbeitsansichten mit Teilzahlungen, GnuCash-Referenzen, Zahlungszuordnungen, Mahnungen und Gebühren.",
+      "Positionen, Zahlungen und Mahnungen einer Forderung werden gemeinsam in einer farblich gruppierten Übersicht dargestellt.",
       "Dropdowns zeigen deutsche Begriffe bei weiterhin englischen Speicher-Keys; der Hausmeisterstatus liegt einheitlich in housekeeper.json.",
       "Mehrstufiger Mahnworkflow mit Hausmeister-Regel, Entwurf, Versandbestätigung, Zahlungsfrist, optionaler Gebühr und Mahnsperre ergänzt.",
       "Splash-Screen auf das eingebettete CCMA-Hintergrundmotiv umgestellt und redundante Titeltexte entfernt.",
diff --git a/src/ccma/ui/claim_tab.py b/src/ccma/ui/claim_tab.py
index ec8f439..92b7b97 100644
--- a/src/ccma/ui/claim_tab.py
+++ b/src/ccma/ui/claim_tab.py
@@ -77,17 +77,7 @@ class ClaimTab(ttk.Frame):
             self.summary_vars[key] = variable
             ttk.Label(card, textvariable=variable, style="CardValue.TLabel").pack(anchor="w", pady=(5, 0))
 
-        notebook = ttk.Notebook(self)
-        notebook.grid(row=2, column=0, sticky="nsew")
-        positions = ttk.Frame(notebook, padding=12)
-        payments = ttk.Frame(notebook, padding=12)
-        reminders = ttk.Frame(notebook, padding=12)
-        notebook.add(positions, text="Positionen")
-        notebook.add(payments, text="Zahlungen")
-        notebook.add(reminders, text="Mahnungen")
-        self._build_positions(positions)
-        self._build_payments(payments)
-        self._build_reminders(reminders)
+        self._build_ledger()
 
         footer = ttk.Frame(self)
         footer.grid(row=3, column=0, sticky="ew", pady=(10, 0))
@@ -97,80 +87,64 @@ class ClaimTab(ttk.Frame):
         self.cancel_button = ttk.Button(footer, text="Forderung stornieren", command=self._cancel_claim)
         self.cancel_button.grid(row=0, column=1, sticky="e")
 
-    def _build_positions(self, parent: ttk.Frame) -> None:
-        parent.columnconfigure(0, weight=1)
-        parent.rowconfigure(0, weight=1)
-        self.positions = ttk.Treeview(
-            parent, columns=("type", "description", "quantity", "unit", "amount"), show="headings"
+    def _build_ledger(self) -> None:
+        ledger = ttk.Frame(self, padding=12)
+        ledger.grid(row=2, column=0, sticky="nsew")
+        ledger.columnconfigure(0, weight=1)
+        ledger.rowconfigure(0, weight=1)
+        self.ledger = ttk.Treeview(
+            ledger,
+            columns=("date", "description", "quantity", "unit", "amount", "status", "reference"),
+            show="tree headings",
         )
+        self.ledger.heading("#0", text="Bereich / Element")
+        self.ledger.column("#0", width=190, minwidth=140, anchor="w")
         for key, title, width in (
-            ("type", "Typ", 100),
-            ("description", "Beschreibung", 360),
-            ("quantity", "Menge", 80),
+            ("date", "Datum", 120),
+            ("description", "Beschreibung", 300),
+            ("quantity", "Menge", 75),
             ("unit", "Einzelpreis", 100),
-            ("amount", "Betrag", 100),
+            ("amount", "Betrag", 105),
+            ("status", "Status / Details", 180),
+            ("reference", "Referenz", 210),
         ):
-            self.positions.heading(key, text=title)
-            self.positions.column(key, width=width, anchor="w")
-        self.positions.grid(row=0, column=0, sticky="nsew")
-        ttk.Button(parent, text="Position hinzufügen", command=self._add_item).grid(
-            row=1, column=0, sticky="e", pady=(10, 0)
+            self.ledger.heading(key, text=title)
+            self.ledger.column(key, width=width, minwidth=60, anchor="w")
+        self.ledger.grid(row=0, column=0, sticky="nsew")
+        vertical_scroll = ttk.Scrollbar(ledger, orient="vertical", command=self.ledger.yview)
+        vertical_scroll.grid(row=0, column=1, sticky="ns")
+        horizontal_scroll = ttk.Scrollbar(ledger, orient="horizontal", command=self.ledger.xview)
+        horizontal_scroll.grid(row=1, column=0, sticky="ew")
+        self.ledger.configure(
+            yscrollcommand=vertical_scroll.set,
+            xscrollcommand=horizontal_scroll.set,
         )
+        self.ledger.tag_configure("position-group", background="#1261a0", foreground="#ffffff")
+        self.ledger.tag_configure("position", background="#234d70", foreground="#ffffff")
+        self.ledger.tag_configure("payment-group", background="#237a3b", foreground="#ffffff")
+        self.ledger.tag_configure("payment", background="#285b3b", foreground="#ffffff")
+        self.ledger.tag_configure("reminder-group", background="#b85f00", foreground="#ffffff")
+        self.ledger.tag_configure("reminder", background="#70451f", foreground="#ffffff")
+        self.ledger.bind("<<TreeviewSelect>>", lambda _event: self._update_reminder_buttons())
 
-    def _build_payments(self, parent: ttk.Frame) -> None:
-        parent.columnconfigure(0, weight=1)
-        parent.rowconfigure(0, weight=1)
-        self.payments = ttk.Treeview(
-            parent, columns=("date", "allocated", "payment", "gnucash", "reference"), show="headings"
-        )
-        for key, title, width in (
-            ("date", "Datum", 110),
-            ("allocated", "Zugeordnet", 100),
-            ("payment", "Zahlung gesamt", 110),
-            ("gnucash", "GnuCash-ID", 180),
-            ("reference", "Referenz", 280),
-        ):
-            self.payments.heading(key, text=title)
-            self.payments.column(key, width=width, anchor="w")
-        self.payments.grid(row=0, column=0, sticky="nsew")
-        buttons = ttk.Frame(parent)
-        buttons.grid(row=1, column=0, sticky="e", pady=(10, 0))
+        buttons = ttk.Frame(ledger)
+        buttons.grid(row=2, column=0, columnspan=2, sticky="ew", pady=(10, 0))
+        ttk.Button(buttons, text="Position hinzufügen", command=self._add_item).pack(side="left")
+        ttk.Separator(buttons, orient="vertical").pack(side="left", fill="y", padx=10)
         ttk.Button(buttons, text="Vorhandene Zahlung zuordnen", command=self._allocate_payment).pack(
             side="left", padx=(0, 8)
         )
         ttk.Button(buttons, text="Zahlung erfassen", command=self._record_payment).pack(side="left")
-
-    def _build_reminders(self, parent: ttk.Frame) -> None:
-        parent.columnconfigure(0, weight=1)
-        parent.rowconfigure(0, weight=1)
-        self.reminders = ttk.Treeview(
-            parent,
-            columns=("created", "level", "name", "status", "deadline", "fee"),
-            show="headings",
-        )
-        for key, title, width in (
-            ("created", "Erstellt", 150),
-            ("level", "Stufe", 60),
-            ("name", "Mahnung", 230),
-            ("status", "Status", 130),
-            ("deadline", "Zahlungsfrist", 120),
-            ("fee", "Gebühr", 90),
-        ):
-            self.reminders.heading(key, text=title)
-            self.reminders.column(key, width=width, anchor="w")
-        self.reminders.grid(row=0, column=0, sticky="nsew")
-        self.reminders.bind("<<TreeviewSelect>>", lambda _event: self._update_reminder_buttons())
-        buttons = ttk.Frame(parent)
-        buttons.grid(row=1, column=0, sticky="e", pady=(10, 0))
+        ttk.Separator(buttons, orient="vertical").pack(side="left", fill="y", padx=10)
         self.discard_reminder_button = ttk.Button(
             buttons, text="Entwurf verwerfen", command=self._discard_reminder, state="disabled"
         )
-        self.discard_reminder_button.pack(side="left", padx=(0, 8))
+        self.discard_reminder_button.pack(side="right", padx=(8, 0))
         self.send_reminder_button = ttk.Button(
             buttons, text="Als versandt markieren", command=self._send_reminder, state="disabled"
         )
-        self.send_reminder_button.pack(side="left", padx=(0, 8))
-        ttk.Button(buttons, text="Mahnung vorbereiten", command=self._add_reminder).pack(side="left")
+        self.send_reminder_button.pack(side="right", padx=(8, 0))
+        ttk.Button(buttons, text="Mahnung vorbereiten", command=self._add_reminder).pack(side="right")
 
     def refresh(self) -> None:
         try:
@@ -199,66 +173,111 @@ class ClaimTab(ttk.Frame):
         self.summary_vars["status"].set(CLAIM_STATUS_LABELS.get(status, status.upper()))
         self.cancel_button.configure(state="disabled" if status == "cancelled" else "normal")
         self.hold_button.configure(text="Mahnsperre aufheben" if hold.get("active") else "Mahnsperre setzen")
-        self._render_positions()
-        self._render_payments()
-        self._render_reminders()
+        self._render_ledger()
 
-    def _render_positions(self) -> None:
-        self.positions.delete(*self.positions.get_children())
-        for item in claim_items(self.claim):
-            self.positions.insert(
-                "",
+    def _render_ledger(self) -> None:
+        self.ledger.delete(*self.ledger.get_children())
+        items = claim_items(self.claim)
+        position_group = self.ledger.insert(
+            "",
+            "end",
+            iid="group:positions",
+            text=f"Positionen ({len(items)})",
+            values=("", "", "", "", f"{money_text(claim_total(self.claim))} EUR", "", ""),
+            tags=("position-group",),
+            open=True,
+        )
+        for item in items:
+            self.ledger.insert(
+                position_group,
                 "end",
-                iid=str(item.get("item_id", "")),
+                iid=f"item:{item.get('item_id', '')}",
+                text=display_label(CLAIM_ITEM_TYPE_LABELS, str(item.get("type", ""))),
                 values=(
-                    display_label(CLAIM_ITEM_TYPE_LABELS, str(item.get("type", ""))),
+                    str(item.get("created_at", ""))[:10],
                     item.get("description", ""),
                     item.get("quantity", "1"),
                     item.get("unit_price", item.get("amount", "")),
-                    item.get("amount", ""),
+                    f"{item.get('amount', '')} EUR",
+                    "",
+                    "",
                 ),
+                tags=("position",),
             )
 
-    def _render_payments(self) -> None:
-        self.payments.delete(*self.payments.get_children())
         payment_by_id = {str(item.get("payment_id")): item for item in self.data.payments}
-        for allocation in self.data.allocations:
-            if str(allocation.get("claim_id", "")) != self.claim_id:
-                continue
+        allocations = [
+            allocation
+            for allocation in self.data.allocations
+            if str(allocation.get("claim_id", "")) == self.claim_id
+        ]
+        payment_group = self.ledger.insert(
+            "",
+            "end",
+            iid="group:payments",
+            text=f"Zahlungen ({len(allocations)})",
+            values=("", "", "", "", f"-{money_text(allocated_total(self.data, self.claim_id))} EUR", "", ""),
+            tags=("payment-group",),
+            open=True,
+        )
+        for allocation in allocations:
             payment = payment_by_id.get(str(allocation.get("payment_id", "")), {})
-            self.payments.insert(
-                "",
+            payment_total = str(payment.get("amount", ""))
+            gnucash_id = str(payment.get("gnucash_transaction_id", ""))
+            self.ledger.insert(
+                payment_group,
                 "end",
-                iid=str(allocation.get("allocation_id", "")),
+                iid=f"allocation:{allocation.get('allocation_id', '')}",
+                text="Zahlung",
                 values=(
                     format_date_for_display(str(payment.get("date", ""))),
-                    allocation.get("amount", ""),
-                    payment.get("amount", ""),
-                    payment.get("gnucash_transaction_id", ""),
                     payment.get("reference", ""),
+                    "",
+                    "",
+                    f"-{allocation.get('amount', '')} EUR",
+                    f"Zahlung gesamt: {payment_total} EUR",
+                    f"GnuCash: {gnucash_id}" if gnucash_id else "",
                 ),
+                tags=("payment",),
             )
 
-    def _render_reminders(self) -> None:
-        self.reminders.delete(*self.reminders.get_children())
-        items = {str(item.get("item_id")): item for item in claim_items(self.claim)}
-        for reminder in self.data.reminders:
-            if str(reminder.get("claim_id", "")) != self.claim_id:
-                continue
-            fee_item = items.get(str(reminder.get("fee_item_id", "")), {})
+        reminders = [
+            reminder
+            for reminder in self.data.reminders
+            if str(reminder.get("claim_id", "")) == self.claim_id
+        ]
+        reminder_group = self.ledger.insert(
+            "",
+            "end",
+            iid="group:reminders",
+            text=f"Mahnungen ({len(reminders)})",
+            tags=("reminder-group",),
+            open=True,
+        )
+        for reminder in reminders:
             status = str(reminder.get("status", "draft"))
-            self.reminders.insert(
-                "",
+            deadline = format_date_for_display(str(reminder.get("payment_deadline") or ""))
+            channel = display_label(REMINDER_CHANNEL_LABELS, str(reminder.get("channel", "")))
+            detail = str(reminder.get("detail", ""))
+            self.ledger.insert(
+                reminder_group,
                 "end",
-                iid=str(reminder.get("reminder_id", "")),
+                iid=f"reminder:{reminder.get('reminder_id', '')}",
+                text=f"Mahnstufe {reminder.get('level', '')}",
                 values=(
                     str(reminder.get("created_at", ""))[:16],
-                    reminder.get("level", ""),
                     reminder.get("name", f"Mahnung Stufe {reminder.get('level', '')}"),
+                    "",
+                    "",
+                    f"{reminder.get('fee', '0.00')} EUR",
                     display_label(REMINDER_STATUS_LABELS, status),
-                    format_date_for_display(str(reminder.get("payment_deadline") or "")),
-                    fee_item.get("amount", reminder.get("fee", "0.00")),
+                    " · ".join(
+                        part
+                        for part in (channel, f"Frist: {deadline}" if deadline else "", detail)
+                        if part
+                    ),
                 ),
+                tags=("reminder",),
             )
         self._update_reminder_buttons()
 
@@ -289,11 +308,12 @@ class ClaimTab(ttk.Frame):
         ReminderDialog(self, self.repository, self.member_id, self.claim_id, self._changed)
 
     def _selected_reminder(self) -> dict | None:
-        selected = self.reminders.selection()
-        if not selected:
+        selected = self.ledger.selection()
+        if not selected or not selected[0].startswith("reminder:"):
             return None
+        reminder_id = selected[0].removeprefix("reminder:")
         return next(
-            (item for item in self.data.reminders if str(item.get("reminder_id", "")) == selected[0]),
+            (item for item in self.data.reminders if str(item.get("reminder_id", "")) == reminder_id),
             None,
         )