diff --git a/rust_snuba/src/processors/eap_items.rs b/rust_snuba/src/processors/eap_items.rs
index e1f1421821..8a75fb4d1b 100644
--- a/rust_snuba/src/processors/eap_items.rs
+++ b/rust_snuba/src/processors/eap_items.rs
@@ -76,9 +76,15 @@ fn process_eap_item(msg: KafkaPayload, config: &ProcessorConfig) -> anyhow::Resu
         TraceItemType::Unspecified => "null",
     }
     .to_string();
-
+    // Depending on retention days, a trace item is more expensive.
+    // The default retention is 30 days, a 90day retention for an
+    // item would effectively mean that we are storing 3 times the payload size
+    let retention_days_multiplier = eap_item.retention_days / 30;
     let cogs_data = CogsData {
-        data: BTreeMap::from([(app_feature, payload.len() as u64)]),
+        data: BTreeMap::from([(
+            app_feature,
+            (retention_days_multiplier * payload.len()) as u64,
+        )]),
     };
 
     Ok(ProcessedItem {