diff --git a/apps/api/src/controllers/auth.ts b/apps/api/src/controllers/auth.ts
index 96f94a9..2298430 100644
--- a/apps/api/src/controllers/auth.ts
+++ b/apps/api/src/controllers/auth.ts
@@ -37,7 +37,7 @@ function normalizedApiIsUuid(potentialUuid: string): boolean {
   return validate(potentialUuid);
 }
 
-export async function setCachedACUC(api_key: string, acuc: AuthCreditUsageChunk) {
+export async function setCachedACUC(api_key: string, acuc: AuthCreditUsageChunk | ((acuc: AuthCreditUsageChunk) => AuthCreditUsageChunk)) { 
   const cacheKeyACUC = `acuc_${api_key}`;
   const redLockKey = `lock_${cacheKeyACUC}`;
   const lockTTL = 10000; // 10 seconds
@@ -46,6 +46,15 @@ export async function setCachedACUC(api_key: string, acuc: AuthCreditUsageChunk)
     const lock = await redlock.acquire([redLockKey], lockTTL);
 
     try {
+      if (typeof acuc === "function") {
+        acuc = acuc(JSON.parse(await getValue(cacheKeyACUC)));
+
+        if (acuc === null) {
+          await lock.release();
+          return;
+        }
+      }
+
       // Cache for 10 minutes. This means that changing subscription tier could have
       // a maximum of 10 minutes of a delay. - mogery
       await setValue(cacheKeyACUC, JSON.stringify(acuc), 600);
diff --git a/apps/api/src/services/billing/credit_billing.ts b/apps/api/src/services/billing/credit_billing.ts
index 56de74e..56b02da 100644
--- a/apps/api/src/services/billing/credit_billing.ts
+++ b/apps/api/src/services/billing/credit_billing.ts
@@ -32,16 +32,12 @@ export async function supaBillTeam(team_id: string, subscription_id: string, cre
 
   (async () => {
     for (const apiKey of (data ?? []).map(x => x.api_key)) {
-      const acuc = await getACUC(apiKey, true);
-  
-      if (acuc !== null) {
-        await setCachedACUC(apiKey, {
-          ...acuc,
-          credits_used: acuc.credits_used + credits,
-          adjusted_credits_used: acuc.adjusted_credits_used + credits,
-          remaining_credits: acuc.remaining_credits - credits,
-        });
-      }
+      await setCachedACUC(apiKey, acuc => (acuc ? {
+        ...acuc,
+        credits_used: acuc.credits_used + credits,
+        adjusted_credits_used: acuc.adjusted_credits_used + credits,
+        remaining_credits: acuc.remaining_credits - credits,
+      } : null));
     }
   })();
 }