diff --git a/pkg/consensus/consensus_test.go b/pkg/consensus/consensus_test.go
index db31c204d..7243bce01 100644
--- a/pkg/consensus/consensus_test.go
+++ b/pkg/consensus/consensus_test.go
@@ -239,6 +239,6 @@ func newTestChain(t *testing.T) *core.Blockchain {
 type feer struct{}
 
 func (fs *feer) NetworkFee(*transaction.Transaction) util.Fixed8 { return util.Fixed8(0) }
-func (fs *feer) IsLowPriority(*transaction.Transaction) bool     { return false }
+func (fs *feer) IsLowPriority(util.Fixed8) bool                  { return false }
 func (fs *feer) FeePerByte(*transaction.Transaction) util.Fixed8 { return util.Fixed8(0) }
 func (fs *feer) SystemFee(*transaction.Transaction) util.Fixed8  { return util.Fixed8(0) }
diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index 1c3869c89..2aa323562 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1019,10 +1019,10 @@ func (bc *Blockchain) SystemFee(t *transaction.Transaction) util.Fixed8 {
 	return bc.GetConfig().SystemFee.TryGetValue(t.Type)
 }
 
-// IsLowPriority flags a transaction as low priority if the network fee is less than
+// IsLowPriority checks given fee for being less than configured
 // LowPriorityThreshold.
-func (bc *Blockchain) IsLowPriority(t *transaction.Transaction) bool {
-	return bc.NetworkFee(t) < util.Fixed8FromFloat(bc.GetConfig().LowPriorityThreshold)
+func (bc *Blockchain) IsLowPriority(fee util.Fixed8) bool {
+	return fee < util.Fixed8FromFloat(bc.GetConfig().LowPriorityThreshold)
 }
 
 // GetMemPool returns the memory pool of the blockchain.
diff --git a/pkg/core/mempool/feer.go b/pkg/core/mempool/feer.go
index f92c0e1d1..74b3fb036 100644
--- a/pkg/core/mempool/feer.go
+++ b/pkg/core/mempool/feer.go
@@ -8,7 +8,7 @@ import (
 // Feer is an interface that abstract the implementation of the fee calculation.
 type Feer interface {
 	NetworkFee(t *transaction.Transaction) util.Fixed8
-	IsLowPriority(t *transaction.Transaction) bool
+	IsLowPriority(util.Fixed8) bool
 	FeePerByte(t *transaction.Transaction) util.Fixed8
 	SystemFee(t *transaction.Transaction) util.Fixed8
 }
diff --git a/pkg/core/mempool/mem_pool.go b/pkg/core/mempool/mem_pool.go
index a2f3ef9af..3facd377a 100644
--- a/pkg/core/mempool/mem_pool.go
+++ b/pkg/core/mempool/mem_pool.go
@@ -128,8 +128,8 @@ func (mp *Pool) Add(t *transaction.Transaction, fee Feer) error {
 		timeStamp:  time.Now().UTC(),
 		perByteFee: fee.FeePerByte(t),
 		netFee:     fee.NetworkFee(t),
-		isLowPrio:  fee.IsLowPriority(t),
 	}
+	pItem.isLowPrio = fee.IsLowPriority(pItem.netFee)
 	mp.lock.Lock()
 	if !mp.verifyInputs(t) {
 		mp.lock.Unlock()
diff --git a/pkg/core/mempool/mem_pool_test.go b/pkg/core/mempool/mem_pool_test.go
index 4cd529a06..f60829a2a 100644
--- a/pkg/core/mempool/mem_pool_test.go
+++ b/pkg/core/mempool/mem_pool_test.go
@@ -22,7 +22,7 @@ func (fs *FeerStub) NetworkFee(*transaction.Transaction) util.Fixed8 {
 	return fs.netFee
 }
 
-func (fs *FeerStub) IsLowPriority(*transaction.Transaction) bool {
+func (fs *FeerStub) IsLowPriority(util.Fixed8) bool {
 	return fs.lowPriority
 }
 
diff --git a/pkg/network/helper_test.go b/pkg/network/helper_test.go
index 1ab191d87..468819736 100644
--- a/pkg/network/helper_test.go
+++ b/pkg/network/helper_test.go
@@ -122,7 +122,7 @@ func (chain testChain) GetMemPool() *mempool.Pool {
 	panic("TODO")
 }
 
-func (chain testChain) IsLowPriority(*transaction.Transaction) bool {
+func (chain testChain) IsLowPriority(util.Fixed8) bool {
 	panic("TODO")
 }