diff --git a/nym-api/src/ecash/state/mod.rs b/nym-api/src/ecash/state/mod.rs
index b790e9a84c..c31181e17e 100644
--- a/nym-api/src/ecash/state/mod.rs
+++ b/nym-api/src/ecash/state/mod.rs
@@ -822,7 +822,7 @@ impl EcashState {
         // sanity check:
         assert_eq!(
             cutoff,
-            today + (constants::CRED_VALIDITY_PERIOD_DAYS as i64).days()
+            today + (constants::CRED_VALIDITY_PERIOD_DAYS as i64 - 1).days()
         );
 
         // remove the data we no longer need to hold, i.e. partial bloomfilters beyond max credential validity