diff --git a/src/app/api/portfolio/[portfolioId]/scenario/[scenarioId]/metrics/route.ts b/src/app/api/portfolio/[portfolioId]/scenario/[scenarioId]/metrics/route.ts
index e2a4b3d..4f9471b 100644
--- a/src/app/api/portfolio/[portfolioId]/scenario/[scenarioId]/metrics/route.ts
+++ b/src/app/api/portfolio/[portfolioId]/scenario/[scenarioId]/metrics/route.ts
@@ -1,6 +1,7 @@
 import { db } from "@/app/db/db";
 import { sql } from "drizzle-orm";
 import { NextRequest, NextResponse } from "next/server";
+import { sapToEpc } from "@/app/utils";
 
 type PlanRow = {
   id: bigint;
@@ -25,11 +26,7 @@ export async function GET(
   const pid = BigInt(portfolioId);
   const sid = BigInt(scenarioId);
 
-  //
-  // --------------------------------------------------------------
-  // 1️⃣ Fetch all plans for this portfolio + scenario (FAST)
-  // --------------------------------------------------------------
-  //
+  // Fetch all plans
   const planRows = await db.execute(sql`
     SELECT 
       id,
@@ -58,33 +55,21 @@ export async function GET(
 
   const planIds = plans.map((p) => p.id);
 
-  //
-  // --------------------------------------------------------------
-  // 2️⃣ Fetch total funding for all planIds
-  // funding = SUM(project_funding + total_uplift)
-  // --------------------------------------------------------------
-  //
-
+  // Total funding
   const planIdArray = sql`ARRAY[${sql.join(planIds, sql`, `)}]::bigint[]`;
   const fundingRows = await db.execute(sql`
-  SELECT 
-    SUM(COALESCE(project_funding, 0) + COALESCE(total_uplift, 0))::float AS total_funding
-  FROM funding_package
-  WHERE plan_id = ANY(${planIdArray});
-`);
+    SELECT 
+      SUM(COALESCE(project_funding, 0) + COALESCE(total_uplift, 0))::float AS total_funding
+    FROM funding_package
+    WHERE plan_id = ANY(${planIdArray});
+  `);
 
-  //
-  // --------------------------------------------------------------
-  // 3️⃣ Aggregate scenario metrics (SAP, carbon, bills)
-  // --------------------------------------------------------------
-  //
+  // Averages + totals
   const n = plans.length;
 
   const avg_sap = plans.reduce((s, r) => s + (r.post_sap_points ?? 0), 0) / n;
-
   const avg_carbon =
     plans.reduce((s, r) => s + (r.post_co2_emissions ?? 0), 0) / n;
-
   const avg_bills =
     plans.reduce((s, r) => s + (r.post_energy_bill ?? 0), 0) / n;
 
@@ -92,18 +77,30 @@ export async function GET(
     (s, r) => s + (r.post_co2_emissions ?? 0),
     0
   );
-
   const total_bills = plans.reduce((s, r) => s + (r.post_energy_bill ?? 0), 0);
 
-  //
-  // --------------------------------------------------------------
-  // 4️⃣ Financial Metrics (based on real funding)
-  // --------------------------------------------------------------
-  //
-  const totalCost = 0; // you will add "plan.cost" later
-  const contingency = 0; // also update when you have it
+  // Financial
+  const totalCost = 0;
+  const contingency = 0;
   const funding = Number(fundingRows.rows[0]?.total_funding ?? 0);
-  const netCost = Number(totalCost) - funding;
+  const netCost = totalCost - funding;
+
+  // NEW — scenario EPC band counts
+  const scenario_epc_counts: Record<string, number> = {
+    A: 0,
+    B: 0,
+    C: 0,
+    D: 0,
+    E: 0,
+    F: 0,
+    G: 0,
+    Unknown: 0,
+  };
+
+  for (const p of plans) {
+    const band = sapToEpc(p.post_sap_points);
+    scenario_epc_counts[band] += 1;
+  }
 
   return NextResponse.json({
     avg_sap: avg_sap.toFixed(1),
@@ -117,5 +114,8 @@ export async function GET(
     net_cost: netCost,
     net_cost_per_unit: n > 0 ? netCost / n : 0,
     n_units: n,
+
+    // NEW DATA for Overlay
+    scenario_epc_counts,
   });
 }
diff --git a/src/app/portfolio/[slug]/(portfolio)/reporting/BreakdownChart.tsx b/src/app/portfolio/[slug]/(portfolio)/reporting/BreakdownChart.tsx
index 93e3824..ea0c5da 100644
--- a/src/app/portfolio/[slug]/(portfolio)/reporting/BreakdownChart.tsx
+++ b/src/app/portfolio/[slug]/(portfolio)/reporting/BreakdownChart.tsx
@@ -8,6 +8,8 @@ import {
   CardContent,
 } from "@/app/shadcn_components/ui/card";
 import { BarChart } from "@tremor/react";
+import type { CustomTooltipProps } from "@tremor/react";
+
 import {
   Select,
   SelectTrigger,
@@ -15,48 +17,71 @@ import {
   SelectItem,
   SelectValue,
 } from "@/app/shadcn_components/ui/select";
+
 import type { EpcBandCount, AgeBandCount, PropertyTypeCount } from "./types";
 
 export function BreakdownChart({
   epcBands,
   ageBands,
   propertyTypes,
+  scenarioEpcBands,
 }: {
   epcBands: EpcBandCount[];
   ageBands: AgeBandCount[];
   propertyTypes: PropertyTypeCount[];
+  scenarioEpcBands?: Record<string, number>;
 }) {
   const [selected, setSelected] = useState("epc");
 
-  const chartData = useMemo(() => {
-    switch (selected) {
-      case "epc":
-        return epcBands.map((d) => ({
-          label: d.epc ?? "Unknown",
-          actual: d.actual ?? 0,
-          estimated: d.estimated ?? 0,
-        }));
-      case "age":
-        return ageBands.map((d) => ({
-          label: d.age_band,
-          count: d.count,
-        }));
-      case "type":
-        return propertyTypes.map((d) => ({
-          label: d.type ?? "Unknown",
-          count: d.count,
-        }));
-      default:
-        return [];
-    }
-  }, [selected, epcBands, ageBands, propertyTypes]);
+  const friendlyKeys = {
+    actual: "Actual EPCs",
+    estimated: "Estimated EPCs",
+    scenario: "Scenario result",
+  };
 
-  const categories = selected === "epc" ? ["actual", "estimated"] : ["count"];
+  const chartData = useMemo(() => {
+    if (selected !== "epc") {
+      return selected === "age"
+        ? ageBands.map((d) => ({ label: d.age_band, Count: d.count }))
+        : propertyTypes.map((d) => ({
+            label: d.type ?? "Unknown",
+            Count: d.count,
+          }));
+    }
+
+    const rows: any[] = [];
+
+    for (const d of epcBands) {
+      const epc = d.epc ?? "Unknown";
+      const scenarioValue = scenarioEpcBands?.[epc] ?? 0;
+
+      // Baseline (stacked)
+      rows.push({
+        label: `${epc} (baseline)`,
+        [friendlyKeys.actual]: d.actual ?? 0,
+        [friendlyKeys.estimated]: d.estimated ?? 0,
+        [friendlyKeys.scenario]: 0,
+      });
+
+      // Scenario (single bar)
+      rows.push({
+        label: `${epc} (scenario)`,
+        [friendlyKeys.actual]: 0,
+        [friendlyKeys.estimated]: 0,
+        [friendlyKeys.scenario]: scenarioValue,
+      });
+    }
+
+    return rows;
+  }, [selected, epcBands, ageBands, propertyTypes, scenarioEpcBands]);
+
+  const categories =
+    selected === "epc"
+      ? [friendlyKeys.actual, friendlyKeys.estimated, friendlyKeys.scenario]
+      : ["Count"];
 
   const colors =
-    selected === "epc"
-      ? ["#14163d", "#3943b7"] // brand colours: actual + estimated
-      : ["#2d348f"]; // your existing colour
+    selected === "epc" ? ["#14163d", "#3943b7", "emerald"] : ["#2d348f"];
 
   return (
     <Card className="border border-gray-100 bg-white">
@@ -68,7 +93,7 @@ export function BreakdownChart({
 
           <Select value={selected} onValueChange={setSelected}>
             <SelectTrigger className="w-40">
-              <SelectValue placeholder="Select breakdown" />
+              <SelectValue />
             </SelectTrigger>
             <SelectContent>
               <SelectItem value="epc">EPC Band</SelectItem>
@@ -77,13 +102,6 @@ export function BreakdownChart({
             </SelectContent>
           </Select>
         </div>
-
-        {selected === "epc" && (
-          <p className="text-xs text-gray-500 mt-1">
-            Where an EPC is missing, the EPC band shown here is a modelled
-            estimate.
-          </p>
-        )}
       </CardHeader>
 
       <CardContent>
@@ -93,10 +111,29 @@ export function BreakdownChart({
           categories={categories}
           colors={colors}
           valueFormatter={(v) => v.toString()}
-          stack={selected === "epc"} // enable stacked bars only for EPC mode
+          stack={selected === "epc"}
+          customTooltip={MyTooltip}
           className="h-64"
         />
       </CardContent>
     </Card>
   );
 }
+
+function MyTooltip({ payload }: CustomTooltipProps) {
+  if (!payload || payload.length === 0) return null;
+
+  return (
+    <div className="rounded-md bg-white shadow-lg border border-gray-200 px-3 py-2 text-xs text-gray-700">
+      {payload.map((p) => (
+        <div
+          key={p.dataKey}
+          className="flex justify-between gap-4 items-center"
+        >
+          <span>{p.dataKey}:</span>
+          <span className="font-medium">{p.value}</span>
+        </div>
+      ))}
+    </div>
+  );
+}
diff --git a/src/app/portfolio/[slug]/(portfolio)/reporting/ReportingClientArea.tsx b/src/app/portfolio/[slug]/(portfolio)/reporting/ReportingClientArea.tsx
index 23f4d4c..1b30527 100644
--- a/src/app/portfolio/[slug]/(portfolio)/reporting/ReportingClientArea.tsx
+++ b/src/app/portfolio/[slug]/(portfolio)/reporting/ReportingClientArea.tsx
@@ -100,11 +100,10 @@ export function ReportingClientArea({
           scenarioTotal: scenarioData.total_bills,
         },
         valuation: { baseline: null, scenario: null },
+        scenarioEpcBands: scenarioData.scenario_epc_counts,
       }
     : null;
 
-  console.log("Scenario Data:", scenarioData);
-
   // ----------------------------------------
   // Financial drawer values (from API)
   // ----------------------------------------
@@ -170,6 +169,7 @@ export function ReportingClientArea({
           epcBands={activeMetrics.epcBands}
           ageBands={activeMetrics.ageBands}
           propertyTypes={propertyTypes}
+          scenarioEpcBands={scenarioOverlay?.scenarioEpcBands}
         />
 
         <div className="lg:col-span-2">
diff --git a/src/app/utils.ts b/src/app/utils.ts
index d3c5890..036f55d 100644
--- a/src/app/utils.ts
+++ b/src/app/utils.ts
@@ -92,7 +92,11 @@ export const serializeBigInt = (_: any, value: any): string | any => {
   return typeof value === "bigint" ? value.toString() : value;
 };
 
-export function sapToEpc(sapPoints: number): string {
+export function sapToEpc(sapPoints: number | null): string {
+  if (sapPoints === null) {
+    return "Unknown";
+  }
+
   if (sapPoints < 0) {
     throw new Error("SAP points should be above 0.");
   }