diff --git a/pyproject.toml b/pyproject.toml
index 4ab8653..74d382d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ requires-python = "~=3.13.0"
 dependencies = [
     "alembic>=1.17.0",
     "fastapi[standard]>=0.116.0",
+    "pygrister>=0.8.0",
     "python-dotenv>=1.1.1",
     "reportlab>=4.4.4",
     "sqlalchemy>=2.0.44",
diff --git a/src/meal_manager/grist.py b/src/meal_manager/grist.py
new file mode 100644
index 0000000..c90885f
--- /dev/null
+++ b/src/meal_manager/grist.py
@@ -0,0 +1,56 @@
+import datetime
+import os
+
+from dotenv import load_dotenv
+
+load_dotenv()
+from pygrister.api import GristApi
+
+config = {
+    "GRIST_API_SERVER": "allmende-gufi.de",
+    "GRIST_TEAM_SITE": "grist",
+    "GRIST_API_KEY": os.getenv("GRIST_API_KEY"),
+    "GRIST_DOC_ID": "xmEcaq5pvxUB3mBfEY8BLe",
+}
+
+
+def sync_with_grist(event):
+    grist = GristApi(config=config)
+
+    status_code, grist_response = grist.list_records(
+        "Transactions", filter={"meal_manager_event_id": [event.id]}
+    )
+
+    existing_records = set()
+    for entry in grist_response:
+        existing_records.add(entry["Partei_Konto"])
+
+    new_records = []
+
+    today = datetime.date.today().isoformat()
+    for registration in event.registrations:
+        if registration.household.name in existing_records:
+            continue
+        if registration.num_adult_meals > 0:
+            new_records.append(
+                {
+                    "Datum": event.event_time.date().isoformat(),
+                    "Typ": "Essen",
+                    "Partei_Konto": registration.household.name,
+                    "Betrag": -3.5 * registration.num_adult_meals,
+                    "Date_Added": today,
+                    "meal_manager_event_id": event.id,
+                }
+            )
+        if registration.num_children_meals > 0:
+            new_records.append(
+                {
+                    "Datum": event.event_time.date().isoformat(),
+                    "Typ": "Essen Kind",
+                    "Partei_Konto": registration.household.name,
+                    "Betrag": -2 * registration.num_children_meals,
+                    "Date_Added": today,
+                    "meal_manager_event_id": event.id,
+                }
+            )
+    grist.add_records("Transactions", new_records)
diff --git a/src/meal_manager/main.py b/src/meal_manager/main.py
index 9604165..008b188 100644
--- a/src/meal_manager/main.py
+++ b/src/meal_manager/main.py
@@ -13,6 +13,7 @@ from fastapi.templating import Jinja2Templates
 from sqlalchemy import create_engine, select
 from sqlalchemy.orm import Session
 
+from meal_manager.grist import sync_with_grist
 from meal_manager.models import (
     Base,
     Event,
@@ -295,7 +296,11 @@ async def delete_event(
 
 @app.get("/event/{event_id}")
 async def read_event(
-    request: Request, event_id: int, session: SessionDep, user: UserDep
+    request: Request,
+    event_id: int,
+    session: SessionDep,
+    user: UserDep,
+    message: str | None = None,
 ):
     statement = select(Event).where(Event.id == event_id)
     event = session.scalars(statement).one()
@@ -318,6 +323,7 @@ async def read_event(
             "households": households,
             "now": datetime.now(),
             "user": user,
+            "message": message,
         },
     )
 
@@ -423,3 +429,17 @@ def get_event_attendance_pdf(event_id: int, session: SessionDep):
     return Response(
         content=pdf_buffer.getvalue(), media_type="application/pdf", headers=headers
     )
+
+
+@app.get("/event/{event_id}/sync_with_grist")
+def sync_with_grist_route(event_id: int, session: SessionDep, user: StrictUserDep):
+
+    statement = select(Event).where(Event.id == event_id)
+    event = session.scalars(statement).one()
+
+    sync_with_grist(event)
+
+    return RedirectResponse(
+        url=f"/event/{event_id}?message=Erfolgreich%20an%20Abrechnung%20%C3%BCbertragen",
+        status_code=status.HTTP_302_FOUND,
+    )
diff --git a/src/meal_manager/pdf.py b/src/meal_manager/pdf.py
index 86d6908..5e09c88 100644
--- a/src/meal_manager/pdf.py
+++ b/src/meal_manager/pdf.py
@@ -12,7 +12,14 @@ def build_dinner_overview_pdf(event: Event) -> BytesIO:
     """Build a PDF with an overview of the event's attendance."""
     # Create an in-memory PDF
     buffer = BytesIO()
-    doc = SimpleDocTemplate(buffer, pagesize=portrait(A4), topMargin=30, bottomMargin=30, leftMargin=40, rightMargin=40)
+    doc = SimpleDocTemplate(
+        buffer,
+        pagesize=portrait(A4),
+        topMargin=30,
+        bottomMargin=30,
+        leftMargin=40,
+        rightMargin=40,
+    )
     styles = getSampleStyleSheet()
     elements = []
 
@@ -20,8 +27,12 @@ def build_dinner_overview_pdf(event: Event) -> BytesIO:
     title_style = styles["Title"]
     title_style.fontSize = 16
     title_style.spaceAfter = 20
-    elements.append(Paragraph(f"Anwesenheitsliste – {event.title} ({event.event_time.date().strftime('%d.%m.%y')})",
-                              title_style))
+    elements.append(
+        Paragraph(
+            f"Anwesenheitsliste – {event.title} ({event.event_time.date().strftime('%d.%m.%y')})",
+            title_style,
+        )
+    )
     elements.append(Spacer(1, 20))
 
     # Team overview section
@@ -32,23 +43,27 @@ def build_dinner_overview_pdf(event: Event) -> BytesIO:
     team_types = {
         "Kochen": [r for r in event.team if r.work_type == "cooking"],
         "Abwaschen": [r for r in event.team if r.work_type == "dishes"],
-        "Tische decken": [r for r in event.team if r.work_type == "tables"]
+        "Tische decken": [r for r in event.team if r.work_type == "tables"],
     }
 
     for team_name, registrations in team_types.items():
         members = ", ".join(r.person_name for r in registrations)
         team_data.append([team_name, members])
 
-    team_table = Table(team_data, repeatRows=1, colWidths=[100, '*'])
-    team_table.setStyle(TableStyle([
-        ("BACKGROUND", (0, 0), (-1, 0), colors.HexColor('#E8E8E8')),
-        ("GRID", (0, 0), (-1, -1), 0.5, colors.HexColor('#A0A0A0')),
-        ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
-        ("FONTNAME", (0, 0), (-1, 0), "Helvetica-Bold"),
-        ("FONTSIZE", (0, 0), (-1, -1), 10),
-        ("BOTTOMPADDING", (0, 0), (-1, -1), 8),
-        ("TOPPADDING", (0, 0), (-1, -1), 8),
-    ]))
+    team_table = Table(team_data, repeatRows=1, colWidths=[100, "*"])
+    team_table.setStyle(
+        TableStyle(
+            [
+                ("BACKGROUND", (0, 0), (-1, 0), colors.HexColor("#E8E8E8")),
+                ("GRID", (0, 0), (-1, -1), 0.5, colors.HexColor("#A0A0A0")),
+                ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
+                ("FONTNAME", (0, 0), (-1, 0), "Helvetica-Bold"),
+                ("FONTSIZE", (0, 0), (-1, -1), 10),
+                ("BOTTOMPADDING", (0, 0), (-1, -1), 8),
+                ("TOPPADDING", (0, 0), (-1, -1), 8),
+            ]
+        )
+    )
 
     elements.append(team_table)
     elements.append(Spacer(1, 25))
@@ -63,37 +78,49 @@ def build_dinner_overview_pdf(event: Event) -> BytesIO:
 
     # Attendance section
     elements.append(Paragraph("Teilnehmende", styles["Heading2"]))
-    elements.append(Paragraph(f"Gesamt: {sum_adults} Erwachsene, {sum_children} Kinder, {sum_small_children} Kleinkinder"))
+    elements.append(
+        Paragraph(
+            f"Gesamt: {sum_adults} Erwachsene, {sum_children} Kinder, {sum_small_children} Kleinkinder"
+        )
+    )
     elements.append(Spacer(1, 12))
 
     # Table header
-    data = [["Haushalt", "Erwachsene", "Kinder >7", "Kinder <7", "Kommentar", "Anwesend?"]]
+    data = [
+        ["Haushalt", "Erwachsene", "Kinder >7", "Kinder <7", "Kommentar", "Anwesend?"]
+    ]
 
     # Table rows
     for r in event.registrations:
-        data.append([
-            r.household.name,
-            r.num_adult_meals,
-            r.num_children_meals,
-            r.num_small_children_meals,
-            Paragraph(r.comment or ""),
-            ""
-        ])
+        data.append(
+            [
+                r.household.name,
+                r.num_adult_meals,
+                r.num_children_meals,
+                r.num_small_children_meals,
+                Paragraph(r.comment or ""),
+                "",
+            ]
+        )
     for _ in range(5):
         data.append([""] * 6)
 
     # Create table
-    table = Table(data, repeatRows=1, colWidths=[120, 70, 60, 60, '*', 65])
-    table.setStyle(TableStyle([
-        ("BACKGROUND", (0, 0), (-1, 0), colors.HexColor('#E8E8E8')),
-        ("GRID", (0, 0), (-1, -1), 0.5, colors.HexColor('#A0A0A0')),
-        ("ALIGN", (1, 1), (-2, -1), "CENTER"),
-        ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
-        ("FONTNAME", (0, 0), (-1, 0), "Helvetica-Bold"),
-        ("FONTSIZE", (0, 0), (-1, -1), 10),
-        ("BOTTOMPADDING", (0, 0), (-1, -1), 3),
-        ("TOPPADDING", (0, 0), (-1, -1), 3),
-    ]))
+    table = Table(data, repeatRows=1, colWidths=[120, 70, 60, 60, "*", 65])
+    table.setStyle(
+        TableStyle(
+            [
+                ("BACKGROUND", (0, 0), (-1, 0), colors.HexColor("#E8E8E8")),
+                ("GRID", (0, 0), (-1, -1), 0.5, colors.HexColor("#A0A0A0")),
+                ("ALIGN", (1, 1), (-2, -1), "CENTER"),
+                ("VALIGN", (0, 0), (-1, -1), "MIDDLE"),
+                ("FONTNAME", (0, 0), (-1, 0), "Helvetica-Bold"),
+                ("FONTSIZE", (0, 0), (-1, -1), 10),
+                ("BOTTOMPADDING", (0, 0), (-1, -1), 3),
+                ("TOPPADDING", (0, 0), (-1, -1), 3),
+            ]
+        )
+    )
 
     elements.append(table)
     doc.build(elements)
diff --git a/src/meal_manager/templates/event.html b/src/meal_manager/templates/event.html
index 23a243d..f0b4630 100644
--- a/src/meal_manager/templates/event.html
+++ b/src/meal_manager/templates/event.html
@@ -20,7 +20,15 @@
 <p class="text-muted">{{ event.event_time.strftime('%A, %d.%m.%Y') }}</p>
 <p>{{ event.description }}</p>
 <hr class="hr"/>
+{% if message %}
+<div class="alert alert-info alert-dismissible fade show" role="alert">
+    <i class="bi bi-info-circle me-2"></i>
+    {{ message }}
+    <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
+</div>
+{% endif %}
 <div class="container">
+    
     <p class="h3">Anmeldungen</p>
     {% if not user %}
     <div class="alert alert-warning m-2">
@@ -62,9 +70,20 @@
                 </div>
             </div>
             {% if user and user.admin %}
-            <button type="button" class="btn btn-danger mb-2 w-100" data-bs-toggle="modal" data-bs-target="#deleteEvent">
-                Event Löschen
-            </button>
+            <div class="row w-100">
+                <div class="col-6 p-1">
+                    <button type="button" class="btn btn-danger w-100" data-bs-toggle="modal" data-bs-target="#deleteEvent">
+                        Event Löschen
+                    </button>
+                </div>
+                <div class="col-6 p-1">
+                    <a href="/event/{{event.id}}/sync_with_grist" class="btn btn-secondary w-100">
+                        <i class="bi bi-cash-coin m-2"></i> Abrechnen
+                    </a>
+                </div>
+            </div>
+
+
             {% endif %}
         </div>
         <div class="col-md-4">
diff --git a/uv.lock b/uv.lock
index ece29e5..c2d7f59 100644
--- a/uv.lock
+++ b/uv.lock
@@ -364,6 +364,7 @@ source = { editable = "." }
 dependencies = [
     { name = "alembic" },
     { name = "fastapi", extra = ["standard"] },
+    { name = "pygrister" },
     { name = "python-dotenv" },
     { name = "reportlab" },
     { name = "sqlalchemy" },
@@ -380,6 +381,7 @@ dev = [
 requires-dist = [
     { name = "alembic", specifier = ">=1.17.0" },
     { name = "fastapi", extras = ["standard"], specifier = ">=0.116.0" },
+    { name = "pygrister", specifier = ">=0.8.0" },
     { name = "python-dotenv", specifier = ">=1.1.1" },
     { name = "reportlab", specifier = ">=4.4.4" },
     { name = "sqlalchemy", specifier = ">=2.0.44" },
@@ -518,6 +520,19 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/c7/21/705964c7812476f378728bdf590ca4b771ec72385c533964653c68e86bdc/pygments-2.19.2-py3-none-any.whl", hash = "sha256:86540386c03d588bb81d44bc3928634ff26449851e99741617ecb9037ee5ec0b", size = 1225217, upload-time = "2025-06-21T13:39:07.939Z" },
 ]
 
+[[package]]
+name = "pygrister"
+version = "0.8.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "requests" },
+    { name = "typer" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/6a/a2/804b3e63bce91fb0c7f093b6f3e522e476d9f3074cd3384d713f73fff78b/pygrister-0.8.0.tar.gz", hash = "sha256:4faaad23b27c9ae46dc7b321a0de376f3bfbdaa5faa7ffd769566105667cd478", size = 41472, upload-time = "2025-08-10T10:53:47.561Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/f2/47/e43f2d8b88477a9b27b39d97e3c61534ae3cda4c99771f8b3c81d2469486/pygrister-0.8.0-py3-none-any.whl", hash = "sha256:b882a93db0aae642435d23f8e6f6a50f737befa35e3cce72f234bedd0ef4bee6", size = 31863, upload-time = "2025-08-10T10:53:46.345Z" },
+]
+
 [[package]]
 name = "python-dotenv"
 version = "1.1.1"
@@ -566,6 +581,21 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/57/66/e040586fe6f9ae7f3a6986186653791fb865947f0b745290ee4ab026b834/reportlab-4.4.4-py3-none-any.whl", hash = "sha256:299b3b0534e7202bb94ed2ddcd7179b818dcda7de9d8518a57c85a58a1ebaadb", size = 1954981, upload-time = "2025-09-19T10:43:33.589Z" },
 ]
 
+[[package]]
+name = "requests"
+version = "2.32.5"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "certifi" },
+    { name = "charset-normalizer" },
+    { name = "idna" },
+    { name = "urllib3" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/c9/74/b3ff8e6c8446842c3f5c837e9c3dfcfe2018ea6ecef224c710c85ef728f4/requests-2.32.5.tar.gz", hash = "sha256:dbba0bac56e100853db0ea71b82b4dfd5fe2bf6d3754a8893c3af500cec7d7cf", size = 134517, upload-time = "2025-08-18T20:46:02.573Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/1e/db/4254e3eabe8020b458f1a747140d32277ec7a271daf1d235b70dc0b4e6e3/requests-2.32.5-py3-none-any.whl", hash = "sha256:2462f94637a34fd532264295e186976db0f5d453d1cdd31473c85a6a161affb6", size = 64738, upload-time = "2025-08-18T20:46:00.542Z" },
+]
+
 [[package]]
 name = "rich"
 version = "14.1.0"