diff --git a/service/billing_usage.go b/service/billing_usage.go
index a8d47917b39d..48615adc4140 100644
--- a/service/billing_usage.go
+++ b/service/billing_usage.go
@@ -133,6 +133,11 @@ func usageFromClaudeBillingUsage(billingUsage *dto.BillingUsage) *dto.Usage {
 	if cacheCreation1h == 0 {
 		cacheCreation1h = claudeUsage.ClaudeCacheCreation1hTokens
 	}
+	// If both split values are still 0 but there's a total, default to 5m
+	// (Claude standard cache TTL is 5 minutes).
+	if cacheCreation5m == 0 && cacheCreation1h == 0 && claudeUsage.CacheCreationInputTokens > 0 {
+		cacheCreation5m = claudeUsage.CacheCreationInputTokens
+	}
 
 	usage := &dto.Usage{
 		PromptTokens:                claudeUsage.InputTokens,
diff --git a/service/tiered_settle.go b/service/tiered_settle.go
index 05337bd774e9..81dd2a716a38 100644
--- a/service/tiered_settle.go
+++ b/service/tiered_settle.go
@@ -26,8 +26,12 @@ func BuildTieredTokenParams(usage *dto.Usage, isClaudeUsageSemantic bool, usedVa
 	cc1h := float64(0)
 
 	if usage.UsageSemantic == "anthropic" {
-		cc1h = float64(usage.ClaudeCacheCreation1hTokens)
-		cc5m = float64(usage.ClaudeCacheCreation5mTokens)
+		if usage.ClaudeCacheCreation1hTokens > 0 {
+			cc1h = float64(usage.ClaudeCacheCreation1hTokens)
+		}
+		if usage.ClaudeCacheCreation5mTokens > 0 {
+			cc5m = float64(usage.ClaudeCacheCreation5mTokens)
+		}
 	}
 
 	img := float64(usage.PromptTokensDetails.ImageTokens)