diff --git a/src/ui/routes/SummaryRoute.tsx b/src/ui/routes/SummaryRoute.tsx
index 4204051..d4a9991 100644
--- a/src/ui/routes/SummaryRoute.tsx
+++ b/src/ui/routes/SummaryRoute.tsx
@@ -1,3 +1,115 @@
+import { useState } from "react";
+import { Link } from "react-router";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Button } from "@/components/ui/button";
+import { useDataset } from "../hooks/useDataset.ts";
+import { datasetMonthSpan, summaryView } from "../../domain/views.ts";
+import { formatAmount, formatMoney } from "../format.ts";
+
 export function SummaryRoute() {
-  return <h1 className="text-2xl font-semibold">Summary</h1>;
+  const dataset = useDataset();
+  const span = datasetMonthSpan(dataset);
+  const [from, setFrom] = useState(span.from);
+  const [to, setTo] = useState(span.to);
+  const [groupBy, setGroupBy] = useState<"post" | "month">("post");
+
+  const view = summaryView(dataset, from, to);
+  const base = dataset.settings.baseCurrency;
+  const difference = Number((view.totalIncome - view.totalCharges).toFixed(2));
+
+  return (
+    <section className="space-y-6">
+      <h1 className="text-2xl font-semibold">Summary</h1>
+
+      <div className="flex flex-wrap items-end gap-4">
+        <div className="space-y-1">
+          <Label htmlFor="from">From</Label>
+          <Input id="from" className="w-32" value={from} onChange={(e) => setFrom(e.target.value)} />
+        </div>
+        <div className="space-y-1">
+          <Label htmlFor="to">To</Label>
+          <Input id="to" className="w-32" value={to} onChange={(e) => setTo(e.target.value)} />
+        </div>
+        <Button
+          variant="outline"
+          size="sm"
+          onClick={() => {
+            setFrom(span.from);
+            setTo(span.to);
+          }}
+        >
+          All time
+        </Button>
+        <div className="ml-auto flex gap-1">
+          {(["post", "month"] as const).map((option) => (
+            <Button
+              key={option}
+              size="sm"
+              variant={groupBy === option ? "default" : "outline"}
+              onClick={() => setGroupBy(option)}
+            >
+              by {option}
+            </Button>
+          ))}
+        </div>
+      </div>
+
+      <dl className="flex gap-6 text-sm">
+        <div>
+          <dt className="text-muted-foreground">Income</dt>
+          <dd className="font-money">{formatMoney(view.totalIncome, base)}</dd>
+        </div>
+        <div>
+          <dt className="text-muted-foreground">Spent</dt>
+          <dd className="font-money">{formatMoney(view.totalCharges, base)}</dd>
+        </div>
+        <div>
+          <dt className="text-muted-foreground">Difference</dt>
+          <dd className={`font-money ${difference < 0 ? "text-overspend" : ""}`}>
+            {formatMoney(difference, base)}
+          </dd>
+        </div>
+      </dl>
+
+      <table className="w-full text-sm">
+        <thead className="border-b text-left text-muted-foreground">
+          <tr>
+            <th className="py-2">{groupBy === "post" ? "Post" : "Month"}</th>
+            <th className="py-2 text-right">Spent</th>
+            <th className="py-2 text-right">Share</th>
+          </tr>
+        </thead>
+        <tbody>
+          {groupBy === "post"
+            ? view.byPost.map((entry) => (
+                <tr key={entry.post.id} className="border-b last:border-0">
+                  <td className="py-2">{entry.post.name}</td>
+                  <td className="py-2 text-right font-money">{formatAmount(entry.charges)}</td>
+                  <td className="py-2 text-right font-money text-muted-foreground">
+                    {view.totalCharges === 0
+                      ? "—"
+                      : `${((entry.charges / view.totalCharges) * 100).toFixed(1)}%`}
+                  </td>
+                </tr>
+              ))
+            : view.byMonth.map((entry) => (
+                <tr key={entry.monthId} className="border-b last:border-0">
+                  <td className="py-2">
+                    <Link to={`/month/${entry.monthId}`} className="hover:underline">
+                      {entry.monthId}
+                    </Link>
+                  </td>
+                  <td className="py-2 text-right font-money">{formatAmount(entry.charges)}</td>
+                  <td className="py-2 text-right font-money text-muted-foreground">
+                    {view.totalCharges === 0
+                      ? "—"
+                      : `${((entry.charges / view.totalCharges) * 100).toFixed(1)}%`}
+                  </td>
+                </tr>
+              ))}
+        </tbody>
+      </table>
+    </section>
+  );
 }