diff --git a/staker/calculate_pool_position_reward.gno b/staker/calculate_pool_position_reward.gno
index cd34621a8..06f642de5 100644
--- a/staker/calculate_pool_position_reward.gno
+++ b/staker/calculate_pool_position_reward.gno
@@ -7,6 +7,8 @@ import (
 
 	"gno.land/r/gnoswap/v1/gns"
 
+	ufmt "gno.land/p/demo/ufmt"
+
 	//pn "gno.land/r/gnoswap/v1/position"
 
 	u256 "gno.land/p/gnoswap/uint256"
@@ -99,7 +101,6 @@ func CalcPositionReward(currentHeight uint64, tokenId uint64, deposits *Deposits
 
 	pool.cacheInternalReward(poolTier, currentHeight)
 
-	// println(ufmt.Sprintf("pool.currentInternalReward || poolPath(%s), poolTier(%d), currentHeight(%d), currentReward(%s)", poolPath, poolTier.CurrentTier(poolPath, currentHeight), currentHeight, pool.rewardCache.CurrentReward(currentHeight).(*u256.Uint).ToString()))
 
 	pool.cacheExternalReward(currentHeight)
 
@@ -122,3 +123,12 @@ func CalcPositionReward(currentHeight uint64, tokenId uint64, deposits *Deposits
 
 	return internalRewards, internalPenalties, externalRewards, externalPenalties
 }
+
+func ProcessUnclaimableReward(poolPath string, endHeight uint64) (uint64, map[string]uint64) {
+	pool, ok := pools.Get(poolPath)
+	if !ok {
+		return 0, make(map[string]uint64)
+	}
+	return pool.processUnclaimableReward(poolTier, endHeight)
+}
+
diff --git a/staker/reward_calculation_pool.gno b/staker/reward_calculation_pool.gno
index a6ff07ff5..3c081fd6a 100644
--- a/staker/reward_calculation_pool.gno
+++ b/staker/reward_calculation_pool.gno
@@ -7,6 +7,8 @@ import (
 
 	"gno.land/p/demo/avl"
 
+	ufmt "gno.land/p/demo/ufmt"
+
 	i256 "gno.land/p/gnoswap/int256"
 	u256 "gno.land/p/gnoswap/uint256"
 )
@@ -57,6 +59,7 @@ type Pool struct {
 	// conceptually equal with Pool.liquidity but only for the staked positions
 	// updated each time when the pool crosses a staked tick
 	stakedLiquidity *UintTree // blockNumber -> *u256.Uint
+	lastUnclaimableHeight *uint64
 
 	// cache of the internal reward per liquidity for each pool in tier
 	// value: (internal reward / total staked liquidity) * Q192
@@ -72,6 +75,7 @@ func NewPool(poolPath string, currentHeight uint64) *Pool {
 	return &Pool{
 		poolPath:              poolPath,
 		stakedLiquidity:       NewUintTree(),
+		lastUnclaimableHeight: &currentHeight,
 		rewardCache:           NewRewardCacheTree(),
 		lastRewardCacheHeight: &currentHeight,
 		incentives:            NewIncentives(currentHeight),
@@ -402,6 +406,94 @@ func (self *Pool) modifyDeposit(tokenId uint64, liquidity *i256.Int, currentHeig
 	self.stakedLiquidity.Set(currentHeight, liquidityMathAddDelta(lastStakedLiquidity, liquidity))
 }
 
+func (self *Pool) UnclaimableInternalReward(poolTier *PoolTier, startHeight, endHeight uint64) uint64 {
+	tierRewardHeights, tierRewardUpdates := poolTier.TierRewardUpdates(self.poolPath, startHeight, endHeight)
+
+	currentTierReward := tierRewardUpdates[0]
+
+	unclaimable := uint64(0)
+
+	currentStakedLiquidity := self.CurrentStakedLiquidity(startHeight)
+
+	for i := 1; i < len(tierRewardHeights); i++ {
+		endHeight := tierRewardHeights[i]
+
+		currentStakedLiquidity = self.CurrentStakedLiquidity(startHeight)
+		self.stakedLiquidity.Iterate(startHeight, endHeight, func(height uint64, value interface{}) bool {
+			if currentStakedLiquidity.IsZero() {
+				unclaimable += currentTierReward * (height - startHeight)
+			}
+			startHeight = height
+			currentStakedLiquidity = value.(*u256.Uint)
+			return false
+		})
+
+		if currentStakedLiquidity.IsZero() {
+			unclaimable += currentTierReward * (endHeight - startHeight)
+		}
+
+		startHeight = endHeight
+		currentTierReward = tierRewardUpdates[i]
+	}
+
+	if currentStakedLiquidity.IsZero() {
+		unclaimable += currentTierReward * (endHeight - startHeight)
+	}	
+
+	return unclaimable
+}
+
+func (self *Pool) UnclaimableExternalReward(incentiveId string, startHeight, endHeight uint64) uint64 {
+	incentive, ok := self.incentives.GetByIncentiveId(incentiveId)
+	if !ok {
+		return 0
+	}
+
+	if startHeight > uint64(incentive.endHeight) || endHeight < uint64(incentive.startHeight) {
+		return 0
+	}
+
+	if startHeight < uint64(incentive.startHeight) {
+		startHeight = uint64(incentive.startHeight)
+	}
+
+	if endHeight > uint64(incentive.endHeight) {
+		endHeight = uint64(incentive.endHeight)
+	}
+
+	rewardPerBlock := incentive.rewardPerBlock
+
+	unclaimable := uint64(0)
+
+	currentStakedLiquidity := self.CurrentStakedLiquidity(startHeight)
+
+	self.stakedLiquidity.Iterate(startHeight, endHeight, func(height uint64, value interface{}) bool {
+		if currentStakedLiquidity.IsZero() {
+			unclaimable += rewardPerBlock * (height - startHeight)
+		}
+		startHeight = height
+		currentStakedLiquidity = value.(*u256.Uint)
+		return false
+	})
+
+	if currentStakedLiquidity.IsZero() {
+		unclaimable += rewardPerBlock * (endHeight - startHeight)
+	}
+
+	return unclaimable
+}
+
+func (self *Pool) processUnclaimableReward(poolTier *PoolTier, endHeight uint64) (uint64, map[string]uint64) {
+	startHeight := *self.lastUnclaimableHeight
+	internalUnclaimable := self.UnclaimableInternalReward(poolTier, startHeight, endHeight)
+	externalUnclaimable := make(map[string]uint64)
+	for incentiveId := range self.incentives.CurrentReward(startHeight) {
+		externalUnclaimable[incentiveId] = self.UnclaimableExternalReward(incentiveId, startHeight, endHeight)
+	}
+	self.lastUnclaimableHeight = &endHeight
+	return internalUnclaimable, externalUnclaimable
+}
+
 // ============================================
 // API/helpers
 // ============================================
diff --git a/staker/staker.gno b/staker/staker.gno
index f8b09825f..e9d3c9edd 100644
--- a/staker/staker.gno
+++ b/staker/staker.gno
@@ -382,6 +382,11 @@ func CollectReward(tokenId uint64, unwrapResult bool) string {
 	// internal penalty to community pool
 	gns.Transfer(a2u(consts.COMMUNITY_POOL_ADDR), reward.InternalPenalty)
 
+	unclaimableInternal, unclaimableExternal := ProcessUnclaimableReward(deposit.targetPoolPath, uint64(std.GetHeight()))
+
+	// internal unclaimable to community pool
+	gns.Transfer(a2u(consts.COMMUNITY_POOL_ADDR), unclaimableInternal)
+
 	prevAddr, prevRealm := getPrev()
 	std.Emit(
 		"CollectRewardEmission",
@@ -396,6 +401,7 @@ func CollectReward(tokenId uint64, unwrapResult bool) string {
 		"internal_amount", ufmt.Sprintf("%d", toUser),
 		"internal_unstakingFee", ufmt.Sprintf("%d", reward.Internal-toUser),
 		"internal_left", ufmt.Sprintf("%d", reward.InternalPenalty),
+		"internal_unclaimable", ufmt.Sprintf("%d", unclaimableInternal),
 	)
 
 	return ""