diff --git a/src/functions/existingLimitsSetup.ts b/src/functions/existingLimitsSetup.ts
new file mode 100644
index 0000000..5b7a572
--- /dev/null
+++ b/src/functions/existingLimitsSetup.ts
@@ -0,0 +1,26 @@
+import { Client } from '..';
+
+export default async function existingLimitsSetup(client: Client): Promise<number> {
+  const tier1 = await client.db.Tier.findOne({ id: 1 });
+  const tier2 = await client.db.Tier.findOne({ id: 2 });
+  const tier3 = await await client.db.Tier.findOne({ id: 3 });
+
+  const accounts = await client.db.Account.find();
+  let numOfAccountsUpdated = 0;
+
+  for (const account of accounts) {
+    if (account.tier === 1) {
+      account.updateOne({ $set: { ramLimitNotification: tier1.resourceLimits.ram - 20 } });
+      numOfAccountsUpdated += 1;
+    }
+    if (account.tier === 2) {
+      account.updateOne({ $set: { ramLimitNotification: tier2.resourceLimits.ram - 20 } });
+      numOfAccountsUpdated += 1;
+    }
+    if (account.tier === 3) {
+      account.updateOne({ $set: { ramLimitNotification: tier3.resourceLimits.ram - 20 } });
+      numOfAccountsUpdated += 1;
+    }
+  }
+  return numOfAccountsUpdated;
+}
diff --git a/src/functions/index.ts b/src/functions/index.ts
index 8c3a5ac..b933c35 100644
--- a/src/functions/index.ts
+++ b/src/functions/index.ts
@@ -1,4 +1,5 @@
 export { default as checkLock, clear as clearLock } from '../intervals/checkLock';
 export { default as dataConversion } from './dataConversion';
+export { default as existingLimitsSetup } from './existingLimitsSetup';
 // export { default as checkSS, clear as clearSS } from './checkSS';
 export { default as parseCertificate, Certificate } from './parseCertificate';