diff --git a/functions/src/scripts/backfill-subsidy-pool.ts b/functions/src/scripts/backfill-subsidy-pool.ts
new file mode 100644
index 00000000..092e026d
--- /dev/null
+++ b/functions/src/scripts/backfill-subsidy-pool.ts
@@ -0,0 +1,24 @@
+import * as admin from 'firebase-admin'
+import { initAdmin } from './script-init'
+
+initAdmin()
+const firestore = admin.firestore()
+
+if (require.main === module) {
+  const contractsRef = firestore.collection('contracts')
+  contractsRef.get().then(async (contractsSnaps) => {
+
+    console.log(`Loaded ${contractsSnaps.size} contracts.`)
+
+    const needsFilling = contractsSnaps.docs.filter((ct) => {
+      return !('subsidyPool' in ct.data())
+    })
+
+    console.log(`Found ${needsFilling.length} contracts to update.`)
+    await Promise.all(
+      needsFilling.map((ct) => ct.ref.update({ subsidyPool: 0 }))
+    )
+
+    console.log(`Updated all contracts.`)
+  })
+}