diff --git a/pallets/funding/src/functions/2_evaluation.rs b/pallets/funding/src/functions/2_evaluation.rs
index b97e071a2..e33cc7c57 100644
--- a/pallets/funding/src/functions/2_evaluation.rs
+++ b/pallets/funding/src/functions/2_evaluation.rs
@@ -94,6 +94,7 @@ impl<T: Config> Pallet<T> {
 		ensure!(usd_amount >= T::MinUsdPerEvaluation::get(), Error::<T>::TooLow);
 		ensure!(project_details.issuer_did != did, Error::<T>::ParticipationToOwnProject);
 		ensure!(project_details.status == ProjectStatus::EvaluationRound, Error::<T>::IncorrectRound);
+		ensure!(project_details.round_duration.started(now) && !project_details.round_duration.ended(now),  Error::<T>::IncorrectRound);
 		ensure!(total_evaluations_count < T::MaxEvaluationsPerProject::get(), Error::<T>::TooManyProjectParticipations);
 		ensure!(user_evaluations_count < T::MaxEvaluationsPerUser::get(), Error::<T>::TooManyUserParticipations);
 
diff --git a/pallets/funding/src/functions/3_auction.rs b/pallets/funding/src/functions/3_auction.rs
index 2c6c94852..91de9e0de 100644
--- a/pallets/funding/src/functions/3_auction.rs
+++ b/pallets/funding/src/functions/3_auction.rs
@@ -89,6 +89,7 @@ impl<T: Config> Pallet<T> {
 		ensure!(ct_amount > Zero::zero(), Error::<T>::TooLow);
 		ensure!(did != project_details.issuer_did, Error::<T>::ParticipationToOwnProject);
 		ensure!(matches!(project_details.status, ProjectStatus::AuctionRound), Error::<T>::IncorrectRound);
+		ensure!(project_details.round_duration.started(now) && !project_details.round_duration.ended(now),  Error::<T>::IncorrectRound);
 		ensure!(
 			project_metadata.participation_currencies.contains(&funding_asset),
 			Error::<T>::FundingAssetNotAccepted
diff --git a/pallets/funding/src/functions/4_contribution.rs b/pallets/funding/src/functions/4_contribution.rs
index 5f334d45d..9896e8342 100644
--- a/pallets/funding/src/functions/4_contribution.rs
+++ b/pallets/funding/src/functions/4_contribution.rs
@@ -24,9 +24,8 @@ impl<T: Config> Pallet<T> {
 
 		let now = <frame_system::Pallet<T>>::block_number();
 		let remainder_started = now >= remainder_start;
-		let round_end = project_details.round_duration.end().ok_or(Error::<T>::ImpossibleState)?;
 		ensure!(!did_has_winning_bid || remainder_started, Error::<T>::UserHasWinningBid);
-		ensure!(now < round_end, Error::<T>::TooLateForRound);
+		ensure!(project_details.round_duration.started(now) && !project_details.round_duration.ended(now),  Error::<T>::IncorrectRound);
 
 		let buyable_tokens = token_amount.min(project_details.remaining_contribution_tokens);
 		if buyable_tokens.is_zero() {
diff --git a/pallets/funding/src/tests/2_evaluation.rs b/pallets/funding/src/tests/2_evaluation.rs
index c5e0d6800..8895e4650 100644
--- a/pallets/funding/src/tests/2_evaluation.rs
+++ b/pallets/funding/src/tests/2_evaluation.rs
@@ -982,5 +982,33 @@ mod evaluate_extrinsic {
 				);
 			});
 		}
+
+		#[test]
+		fn evaluated_after_end_block_before_transitioning_project() {
+			let mut inst = MockInstantiator::new(Some(RefCell::new(new_test_ext())));
+			let issuer = ISSUER_1;
+			let project_metadata = default_project_metadata(issuer);
+			let project_id = inst.create_evaluating_project(project_metadata.clone(), issuer, None);
+			let project_details = inst.get_project_details(project_id);
+			let end_block = project_details.round_duration.end().unwrap();
+			inst.jump_to_block(end_block + 1);
+			assert_eq!(inst.get_project_details(project_id).status, ProjectStatus::EvaluationRound);
+			inst.execute(|| {
+				assert_noop!(
+					PolimecFunding::evaluate(
+						RuntimeOrigin::signed(EVALUATOR_1),
+						get_mock_jwt_with_cid(
+							EVALUATOR_1,
+							InvestorType::Retail,
+							generate_did_from_account(EVALUATOR_1),
+							project_metadata.clone().policy_ipfs_cid.unwrap()
+						),
+						project_id,
+						500 * USD_UNIT,
+					),
+					Error::<TestRuntime>::IncorrectRound
+				);
+			});
+		}
 	}
 }
diff --git a/pallets/funding/src/tests/3_auction.rs b/pallets/funding/src/tests/3_auction.rs
index 154fa3d9d..62e4707b4 100644
--- a/pallets/funding/src/tests/3_auction.rs
+++ b/pallets/funding/src/tests/3_auction.rs
@@ -1863,6 +1863,35 @@ mod bid_extrinsic {
 				);
 			});
 		}
+
+		#[test]
+		fn bid_after_end_block_before_transitioning_project() {
+			let mut inst = MockInstantiator::new(Some(RefCell::new(new_test_ext())));
+			let project_metadata = default_project_metadata(ISSUER_1);
+			let project_id =
+				inst.create_auctioning_project(project_metadata.clone(), ISSUER_1, None, default_evaluations());
+			let end_block = inst.get_project_details(project_id).round_duration.end.unwrap();
+			inst.jump_to_block(end_block + 1);
+			assert_eq!(inst.get_project_details(project_id).status, ProjectStatus::AuctionRound);
+			inst.execute(|| {
+				assert_noop!(
+					PolimecFunding::bid(
+						RuntimeOrigin::signed(BIDDER_1),
+						get_mock_jwt_with_cid(
+							BIDDER_1,
+							InvestorType::Professional,
+							generate_did_from_account(BIDDER_1),
+							project_metadata.clone().policy_ipfs_cid.unwrap()
+						),
+						project_id,
+						5000 * CT_UNIT,
+						ParticipationMode::Classic(1u8),
+						AcceptedFundingAsset::USDT
+					),
+					Error::<TestRuntime>::IncorrectRound
+				);
+			});
+		}
 	}
 }
 
diff --git a/pallets/funding/src/tests/4_contribution.rs b/pallets/funding/src/tests/4_contribution.rs
index 587c240d6..4ea8c9688 100644
--- a/pallets/funding/src/tests/4_contribution.rs
+++ b/pallets/funding/src/tests/4_contribution.rs
@@ -2184,5 +2184,35 @@ mod contribute_extrinsic {
 				);
 			});
 		}
+
+		#[test]
+		fn contributed_after_end_block_before_transitioning_project() {
+			let mut inst = MockInstantiator::new(Some(RefCell::new(new_test_ext())));
+			let project_metadata = default_project_metadata(ISSUER_1);
+			let project_id =
+				inst.create_community_contributing_project(project_metadata.clone(), ISSUER_1, None, default_evaluations(), vec![]);
+			let end_block = inst.get_project_details(project_id).round_duration.end.unwrap();
+			inst.jump_to_block(end_block + 1);
+			assert!(matches!(inst.get_project_details(project_id).status, ProjectStatus::CommunityRound(..)));
+
+			inst.execute(|| {
+				assert_noop!(
+					PolimecFunding::contribute(
+						RuntimeOrigin::signed(BUYER_1),
+						get_mock_jwt_with_cid(
+							BUYER_1,
+							InvestorType::Professional,
+							generate_did_from_account(BUYER_1),
+							project_metadata.clone().policy_ipfs_cid.unwrap()
+						),
+						project_id,
+						5000 * CT_UNIT,
+						ParticipationMode::Classic(1u8),
+						AcceptedFundingAsset::USDT
+					),
+					Error::<TestRuntime>::IncorrectRound
+				);
+			});
+		}
 	}
 }