diff --git a/pallets/quota/src/benchmarking.rs b/pallets/quota/src/benchmarking.rs
index 3237008785c1825cc2ffe3eb2fea24fcdf4b664a..4519eea02f754bef4fff507b183148cc825ecb20 100644
--- a/pallets/quota/src/benchmarking.rs
+++ b/pallets/quota/src/benchmarking.rs
@@ -18,6 +18,7 @@
 
 use super::*;
 use frame_benchmarking::{account, benchmarks};
+use sp_runtime::traits::One;
 
 fn assert_has_event<T: Config>(generic_event: <T as Config>::RuntimeEvent) {
     frame_system::Pallet::<T>::assert_has_event(generic_event.into());
@@ -54,17 +55,21 @@ benchmarks! {
     spend_quota {
         let idty_id: IdtyId<T> = 1u32.into();
         let amount = 2u64;
+        let quota_amount = 10u64;
         IdtyQuota::<T>::insert(
             idty_id,
             Quota {
                 last_use: T::BlockNumber::zero(),
-                amount: 10u64.into(),
+                amount: quota_amount.into(),
             },
         );
     }: { Pallet::<T>::spend_quota(idty_id.into(), amount.into()) }
     verify {
-        // Initially 10, updated to 11, minus 2
-        assert_eq!(IdtyQuota::<T>::get(idty_id).unwrap().amount, 9u64.into());
+        let quota_growth = sp_runtime::Perbill::from_rational(
+            T::BlockNumber::one(),
+            T::ReloadRate::get(),
+        ).mul_floor(T::MaxQuota::get());
+        assert_eq!(IdtyQuota::<T>::get(idty_id).unwrap().amount,  quota_growth +quota_amount.into() - amount.into());
     }
     try_refund {
         let account: T::AccountId = account("Alice", 1, 1);
@@ -89,7 +94,7 @@ benchmarks! {
         };
     }: { Pallet::<T>::try_refund(refund) }
     verify {
-assert_has_event::<T>(Event::<T>::RefundFailed ( account ).into());
+        assert_has_event::<T>(Event::<T>::RefundFailed ( account ).into());
     }
     do_refund {
         let account: T::AccountId = account("Alice", 1, 1);
@@ -106,21 +111,45 @@ assert_has_event::<T>(Event::<T>::RefundFailed ( account ).into());
         };
     }: { Pallet::<T>::try_refund(refund) }
     verify {
-assert_has_event::<T>(Event::<T>::RefundFailed ( account ).into());
+        assert_has_event::<T>(Event::<T>::RefundFailed ( account ).into());
     }
-    process_refund_queue {
+    // The base weight consumed on processing refund queue when empty.
+    on_process_refund_queue {
+        assert_eq!(RefundQueue::<T>::get().len() as u32, 0);
+    }: { Pallet::<T>::process_refund_queue(Weight::MAX) }
+    // The weight consumed on processing refund queue with one element.
+    // Can deduce the process_refund_queue overhead by subtracting try_refund weight.
+    #[pov_mode = Measured]
+    on_process_refund_queue_elements {
+        let i in 1..MAX_QUEUED_REFUNDS;
         let account: T::AccountId = account("Alice", 1, 1);
-        let dummy_refund = Refund {
+        let idty_id: IdtyId<T> = 1u32.into();
+        IdtyQuota::<T>::insert(
+            idty_id,
+            Quota {
+                last_use: T::BlockNumber::zero(),
+                amount: 10u64.into(),
+            },
+        );
+        let _ = CurrencyOf::<T>:: make_free_balance_be(
+                &T::RefundAccount::get(),u32::MAX.into(),
+            );
+        // The worst-case scenario is when the refund fails
+        // and can only be triggered if the account is dead,
+        // in this case by having no balance in the account.
+        let refund = Refund {
             account: account.clone(),
-            identity: 0u32.into(),
-            amount: 20u64.into(),
+            identity: 1u32.into(),
+            amount: 10u64.into(),
         };
-        // Worst case scenario: the queue is full, and the available weight is maximal.
-        for i in 0 .. MAX_QUEUED_REFUNDS {
-            Pallet::<T>::queue_refund(dummy_refund.clone())
+        for _ in 0..i {
+            Pallet::<T>::queue_refund(refund.clone());
         }
+        assert_eq!(RefundQueue::<T>::get().len() as u32, i);
     }: { Pallet::<T>::process_refund_queue(Weight::MAX) }
     verify {
-        assert_eq!(RefundQueue::<T>::get().len(), 0);
+        assert_eq!(RefundQueue::<T>::get().len() as u32, 0);
+        assert_has_event::<T>(Event::<T>::RefundFailed ( account ).into());
     }
+    impl_benchmark_test_suite!(Pallet, crate::mock::new_test_ext(crate::mock::QuotaConfig{identities: vec![1, 2]}), crate::mock::Test);
 }
diff --git a/pallets/quota/src/lib.rs b/pallets/quota/src/lib.rs
index d62371b1c5af8ac094992b65d682949efa408b98..91df0459e3440a6f4bbcfcb595fb3c6377d9c5aa 100644
--- a/pallets/quota/src/lib.rs
+++ b/pallets/quota/src/lib.rs
@@ -210,19 +210,31 @@ pub mod pallet {
         /// perform as many refunds as possible within the supplied weight limit
         pub fn process_refund_queue(weight_limit: Weight) -> Weight {
             RefundQueue::<T>::mutate(|queue| {
+                // The weight to process an empty queue
+                let mut total_weight = <T as pallet::Config>::WeightInfo::on_process_refund_queue();
+                // The weight to process one element without the actual try_refund weight
+                let overhead =
+                    <T as pallet::Config>::WeightInfo::on_process_refund_queue_elements(2)
+                        .saturating_sub(
+                            <T as pallet::Config>::WeightInfo::on_process_refund_queue_elements(1),
+                        )
+                        .saturating_sub(<T as pallet::Config>::WeightInfo::try_refund());
+
+                // make sure that we have at least the time to handle one try_refund call
                 if queue.is_empty() {
-                    return Weight::zero();
+                    return total_weight;
                 }
-                let mut total_weight = Weight::zero();
-                // make sure that we have at least the time to handle one try_refund call
-                while total_weight.any_lt(
-                    weight_limit.saturating_sub(<T as pallet::Config>::WeightInfo::try_refund()),
-                ) {
+
+                while total_weight.any_lt(weight_limit.saturating_sub(
+                    <T as pallet::Config>::WeightInfo::try_refund().saturating_add(overhead),
+                )) {
                     let Some(queued_refund) = queue.pop() else {
                         break;
                     };
                     let consumed_weight = Self::try_refund(queued_refund);
-                    total_weight = total_weight.saturating_add(consumed_weight);
+                    total_weight = total_weight
+                        .saturating_add(consumed_weight)
+                        .saturating_add(overhead);
                 }
                 total_weight
             })
@@ -308,14 +320,7 @@ pub mod pallet {
     impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
         // process refund queue if space left on block
         fn on_idle(_block: T::BlockNumber, remaining_weight: Weight) -> Weight {
-            // The overhead is computed as the worst-case scenario for process_refund_queue (i.e., when the queue is full),
-            // minus the length of the queue times the actual weight of one refund operation.
-            let overhead = <T as pallet::Config>::WeightInfo::process_refund_queue()
-                .saturating_sub(
-                    <T as pallet::Config>::WeightInfo::try_refund()
-                        .saturating_mul(MAX_QUEUED_REFUNDS.into()),
-                );
-            Self::process_refund_queue(remaining_weight - overhead)
+            Self::process_refund_queue(remaining_weight)
         }
     }
 }
diff --git a/pallets/quota/src/weights.rs b/pallets/quota/src/weights.rs
index 321a69f15fec4a1a4e46ce54eaa63f5940607640..076daa4b1800aa0a9a90c82f2a64474c364700b7 100644
--- a/pallets/quota/src/weights.rs
+++ b/pallets/quota/src/weights.rs
@@ -7,7 +7,8 @@ pub trait WeightInfo {
     fn spend_quota() -> Weight;
     fn try_refund() -> Weight;
     fn do_refund() -> Weight;
-    fn process_refund_queue() -> Weight;
+    fn on_process_refund_queue() -> Weight;
+    fn on_process_refund_queue_elements(_i: u32) -> Weight;
 }
 
 impl WeightInfo for () {
@@ -23,7 +24,10 @@ impl WeightInfo for () {
     fn do_refund() -> Weight {
         Weight::from_parts(25u64, 0)
     }
-    fn process_refund_queue() -> Weight {
-        Weight::from_parts(100u64, 0)
+    fn on_process_refund_queue() -> Weight {
+        Weight::from_parts(1u64, 0)
+    }
+    fn on_process_refund_queue_elements(_i: u32) -> Weight {
+        Weight::from_parts(1u64, 0)
     }
 }
diff --git a/runtime/common/src/weights/pallet_quota.rs b/runtime/common/src/weights/pallet_quota.rs
index e2b2273a839508da8371ba58caaa0a44be38cc01..398fed336bd28029084d161b69e413f570333d5d 100644
--- a/runtime/common/src/weights/pallet_quota.rs
+++ b/runtime/common/src/weights/pallet_quota.rs
@@ -2,7 +2,7 @@
 //! Autogenerated weights for `pallet_quota`
 //!
 //! THIS FILE WAS AUTO-GENERATED USING THE SUBSTRATE BENCHMARK CLI VERSION 4.0.0-dev
-//! DATE: 2023-11-16, STEPS: `50`, REPEAT: `20`, LOW RANGE: `[]`, HIGH RANGE: `[]`
+//! DATE: 2023-11-24, STEPS: `50`, REPEAT: `20`, LOW RANGE: `[]`, HIGH RANGE: `[]`
 //! WORST CASE MAP SIZE: `1000000`
 //! HOSTNAME: `bgallois-ms7d43`, CPU: `12th Gen Intel(R) Core(TM) i3-12100F`
 //! EXECUTION: None, WASM-EXECUTION: Compiled, CHAIN: Some("dev"), DB CACHE: 1024
@@ -41,8 +41,8 @@ impl<T: frame_system::Config> pallet_quota::WeightInfo for WeightInfo<T> {
 		// Proof Size summary in bytes:
 		//  Measured:  `11288`
 		//  Estimated: `12751`
-		// Minimum execution time: 7_447_000 picoseconds.
-		Weight::from_parts(7_619_000, 0)
+		// Minimum execution time: 7_021_000 picoseconds.
+		Weight::from_parts(7_228_000, 0)
 			.saturating_add(Weight::from_parts(0, 12751))
 			.saturating_add(T::DbWeight::get().reads(1))
 			.saturating_add(T::DbWeight::get().writes(1))
@@ -53,8 +53,8 @@ impl<T: frame_system::Config> pallet_quota::WeightInfo for WeightInfo<T> {
 		// Proof Size summary in bytes:
 		//  Measured:  `139`
 		//  Estimated: `3489`
-		// Minimum execution time: 3_617_000 picoseconds.
-		Weight::from_parts(3_727_000, 0)
+		// Minimum execution time: 3_635_000 picoseconds.
+		Weight::from_parts(3_768_000, 0)
 			.saturating_add(Weight::from_parts(0, 3489))
 			.saturating_add(T::DbWeight::get().reads(1))
 			.saturating_add(T::DbWeight::get().writes(1))
@@ -67,8 +67,8 @@ impl<T: frame_system::Config> pallet_quota::WeightInfo for WeightInfo<T> {
 		// Proof Size summary in bytes:
 		//  Measured:  `139`
 		//  Estimated: `3591`
-		// Minimum execution time: 10_892_000 picoseconds.
-		Weight::from_parts(11_314_000, 0)
+		// Minimum execution time: 11_415_000 picoseconds.
+		Weight::from_parts(11_717_000, 0)
 			.saturating_add(Weight::from_parts(0, 3591))
 			.saturating_add(T::DbWeight::get().reads(2))
 			.saturating_add(T::DbWeight::get().writes(1))
@@ -81,24 +81,42 @@ impl<T: frame_system::Config> pallet_quota::WeightInfo for WeightInfo<T> {
 		// Proof Size summary in bytes:
 		//  Measured:  `139`
 		//  Estimated: `3591`
-		// Minimum execution time: 10_876_000 picoseconds.
-		Weight::from_parts(11_384_000, 0)
+		// Minimum execution time: 10_849_000 picoseconds.
+		Weight::from_parts(11_263_000, 0)
 			.saturating_add(Weight::from_parts(0, 3591))
 			.saturating_add(T::DbWeight::get().reads(2))
 			.saturating_add(T::DbWeight::get().writes(1))
 	}
 	/// Storage: Quota RefundQueue (r:1 w:1)
 	/// Proof: Quota RefundQueue (max_values: Some(1), max_size: Some(11266), added: 11761, mode: MaxEncodedLen)
-	/// Storage: Quota IdtyQuota (r:1 w:1)
-	/// Proof: Quota IdtyQuota (max_values: None, max_size: Some(24), added: 2499, mode: MaxEncodedLen)
-	fn process_refund_queue() -> Weight {
+	fn on_process_refund_queue() -> Weight {
 		// Proof Size summary in bytes:
-		//  Measured:  `11428`
+		//  Measured:  `43`
 		//  Estimated: `12751`
-		// Minimum execution time: 262_104_000 picoseconds.
-		Weight::from_parts(275_319_000, 0)
+		// Minimum execution time: 1_530_000 picoseconds.
+		Weight::from_parts(1_646_000, 0)
 			.saturating_add(Weight::from_parts(0, 12751))
-			.saturating_add(T::DbWeight::get().reads(2))
+			.saturating_add(T::DbWeight::get().reads(1))
+			.saturating_add(T::DbWeight::get().writes(1))
+	}
+	/// Storage: Quota RefundQueue (r:1 w:1)
+	/// Proof: Quota RefundQueue (max_values: Some(1), max_size: Some(11266), added: 11761, mode: Measured)
+	/// Storage: Quota IdtyQuota (r:1 w:1)
+	/// Proof: Quota IdtyQuota (max_values: None, max_size: Some(24), added: 2499, mode: Measured)
+	/// Storage: System Account (r:1 w:0)
+	/// Proof: System Account (max_values: None, max_size: Some(126), added: 2601, mode: Measured)
+	/// The range of component `i` is `[1, 256]`.
+	fn on_process_refund_queue_elements(i: u32, ) -> Weight {
+		// Proof Size summary in bytes:
+		//  Measured:  `164 + i * (44 ±0)`
+		//  Estimated: `3628 + i * (44 ±0)`
+		// Minimum execution time: 13_465_000 picoseconds.
+		Weight::from_parts(19_579_671, 0)
+			.saturating_add(Weight::from_parts(0, 3628))
+			// Standard Error: 1_313
+			.saturating_add(Weight::from_parts(465_028, 0).saturating_mul(i.into()))
+			.saturating_add(T::DbWeight::get().reads(3))
 			.saturating_add(T::DbWeight::get().writes(2))
+			.saturating_add(Weight::from_parts(0, 44).saturating_mul(i.into()))
 	}
 }