diff --git a/litellm-proxy-extras/litellm_proxy_extras/migrations/20260924204413_add_spend_logs_session_head_index/migration.sql b/litellm-proxy-extras/litellm_proxy_extras/migrations/20260924204413_add_spend_logs_session_head_index/migration.sql
new file mode 100644
index 00000000000..da26297b59c
--- /dev/null
+++ b/litellm-proxy-extras/litellm_proxy_extras/migrations/20260924204413_add_spend_logs_session_head_index/migration.sql
@@ -0,0 +1,2 @@
+-- CreateIndex (CONCURRENTLY): keep this a single statement so Prisma Migrate applies it outside a transaction
+CREATE INDEX CONCURRENTLY IF NOT EXISTS "LiteLLM_SpendLogs_session_id_api_key_startTime_request_id_idx" ON "LiteLLM_SpendLogs"("session_id", "api_key", "startTime" DESC, "request_id");
diff --git a/litellm-proxy-extras/litellm_proxy_extras/schema.prisma b/litellm-proxy-extras/litellm_proxy_extras/schema.prisma
index 85996430bc5..9429cbabc75 100644
--- a/litellm-proxy-extras/litellm_proxy_extras/schema.prisma
+++ b/litellm-proxy-extras/litellm_proxy_extras/schema.prisma
@@ -684,6 +684,7 @@ model LiteLLM_SpendLogs {
   @@index([session_id])
   @@index([litellm_call_id])
   @@index([api_key, startTime])
+  @@index([session_id, api_key, startTime(sort: Desc), request_id])
 }
 
 model LiteLLM_BudgetWindowSpend {
diff --git a/litellm/proxy/schema.prisma b/litellm/proxy/schema.prisma
index 85996430bc5..9429cbabc75 100644
--- a/litellm/proxy/schema.prisma
+++ b/litellm/proxy/schema.prisma
@@ -684,6 +684,7 @@ model LiteLLM_SpendLogs {
   @@index([session_id])
   @@index([litellm_call_id])
   @@index([api_key, startTime])
+  @@index([session_id, api_key, startTime(sort: Desc), request_id])
 }
 
 model LiteLLM_BudgetWindowSpend {
diff --git a/schema.prisma b/schema.prisma
index 85996430bc5..9429cbabc75 100644
--- a/schema.prisma
+++ b/schema.prisma
@@ -684,6 +684,7 @@ model LiteLLM_SpendLogs {
   @@index([session_id])
   @@index([litellm_call_id])
   @@index([api_key, startTime])
+  @@index([session_id, api_key, startTime(sort: Desc), request_id])
 }
 
 model LiteLLM_BudgetWindowSpend {