diff --git a/src/lib/server/sheets.ts b/src/lib/server/sheets.ts
index fd62874..26532dd 100644
--- a/src/lib/server/sheets.ts
+++ b/src/lib/server/sheets.ts
@@ -12,20 +12,43 @@ async function getToken(credJson: string): Promise<string> {
   return token;
 }
 
+async function sheetIsEmpty(
+  spreadsheetId: string,
+  range: string,
+  token: string
+): Promise<boolean> {
+  const url = `https://sheets.googleapis.com/v4/spreadsheets/${spreadsheetId}/values/${range}`;
+  const res = await fetch(url, { headers: { Authorization: `Bearer ${token}` } });
+  if (!res.ok) return true;
+  const body = await res.json();
+  return !body.values || body.values.length === 0;
+}
+
+export const HEADER_ROW = [
+  'Date', 'Shift', 'Type', 'Calc ID',
+  'Gross Tips', 'CC Fee Rate', 'CC Fees', 'Net Tips',
+  'Kitchen %', 'Kitchen Pool', 'Liquor Sales', 'Bar Liquor %', 'Bar Pool', 'FOH Pool',
+  'Name', 'Role', 'FOH Share', 'Bar Share', 'Kitchen Share', 'Total',
+];
+
 /**
  * Append rows to a Google Sheet.
- * Values are plain strings/numbers; Sheets will auto-detect dates and numbers.
+ * Writes the header row first only when the sheet is empty.
  */
 export async function appendToSheet(
   spreadsheetId: string,
   sheetName: string,
-  values: (string | number)[][],
+  dataRows: (string | number)[][],
   credJson: string
 ): Promise<void> {
   const token = await getToken(credJson);
-  const range = encodeURIComponent(`'${sheetName}'`);
-  const url = `https://sheets.googleapis.com/v4/spreadsheets/${spreadsheetId}/values/${range}:append?valueInputOption=USER_ENTERED&insertDataOption=INSERT_ROWS`;
+  const range = encodeURIComponent(`'${sheetName}'!A1`);
+  const base = `https://sheets.googleapis.com/v4/spreadsheets/${spreadsheetId}`;
+
+  const empty = await sheetIsEmpty(spreadsheetId, range, token);
+  const values = empty ? [HEADER_ROW, ...dataRows] : dataRows;
 
+  const url = `${base}/values/${range}:append?valueInputOption=USER_ENTERED&insertDataOption=INSERT_ROWS`;
   const res = await fetch(url, {
     method: 'POST',
     headers: {
diff --git a/src/routes/api/export/+server.ts b/src/routes/api/export/+server.ts
index dc4fae0..9ed5c02 100644
--- a/src/routes/api/export/+server.ts
+++ b/src/routes/api/export/+server.ts
@@ -26,15 +26,13 @@ export const POST: RequestHandler = async ({ request, locals }) => {
   const credJson = process.env.GOOGLE_SERVICE_ACCOUNT_JSON;
   if (!credJson) error(400, 'GOOGLE_SERVICE_ACCOUNT_JSON env var not set.');
 
-  // Build the row matching PRD OR-8
-  const headerRow = [
-    'Date', 'Shift', 'Gross Tips', 'CC Fee Rate', 'CC Fees', 'Tips After Fees',
-    'Kitchen %', 'Kitchen Pool', 'Liquor Sales', 'Bar Liquor %', 'Bar Pool', 'FOH Pool',
-    ...dists.map(d => d.name),
-  ];
+  // Columns: Date, Shift, Type, Calc ID,
+  //          Gross Tips, CC Fee Rate, CC Fees, Net Tips,
+  //          Kitchen %, Kitchen Pool, Liquor Sales, Bar Liquor %, Bar Pool, FOH Pool,
+  //          Name, Role, FOH Share, Bar Share, Kitchen Share, Total
 
-  const dataRow = [
-    calc.date, calc.shift,
+  const summaryRow: (string | number)[] = [
+    calc.date, calc.shift, 'summary', calc.id,
     formatCents(calc.gross_tips_cents),
     `${(calc.cc_fee_rate * 100).toFixed(1)}%`,
     formatCents(calc.cc_fees_cents),
@@ -45,14 +43,24 @@ export const POST: RequestHandler = async ({ request, locals }) => {
     `${(calc.bar_liquor_pct * 100).toFixed(0)}%`,
     formatCents(calc.bar_pool_cents),
     formatCents(calc.foh_pool_cents),
-    ...dists.map(d => formatCents(d.total_cents)),
+    '', '', '', '', '', '',
   ];
 
+  const staffRows: (string | number)[][] = dists.map(d => [
+    calc.date, calc.shift, 'staff', calc.id,
+    '', '', '', '', '', '', '', '', '', '',
+    d.name, d.role,
+    formatCents(d.foh_share_cents),
+    formatCents(d.bar_pool_share_cents),
+    formatCents(d.kitchen_share_cents),
+    formatCents(d.total_cents),
+  ]);
+
   try {
     await appendToSheet(
       spreadsheetId,
       settings.google_sheets_sheet_name || 'Tip History',
-      [headerRow, dataRow],
+      [summaryRow, ...staffRows],
       credJson
     );
   } catch (e) {