diff --git a/terminate/onpledge.go b/terminate/onpledge.go
new file mode 100644
index 0000000..f2efd0e
--- /dev/null
+++ b/terminate/onpledge.go
@@ -0,0 +1,109 @@
+package terminate
+
+import (
+	"context"
+	"math/big"
+
+	"github.com/filecoin-project/go-state-types/abi"
+	filbig "github.com/filecoin-project/go-state-types/big"
+	"github.com/filecoin-project/go-state-types/builtin"
+	"github.com/filecoin-project/go-state-types/builtin/v13/miner"
+	lotusapi "github.com/filecoin-project/lotus/api"
+	"github.com/filecoin-project/lotus/chain/types"
+	miner8 "github.com/filecoin-project/specs-actors/v8/actors/builtin/miner"
+	"github.com/glifio/go-pools/util"
+)
+
+func TermPenaltyOnPledge(
+	ctx context.Context,
+	api *lotusapi.FullNodeStruct,
+	ts *types.TipSet,
+	filToPledge *big.Int,
+	sectorSize uint64,
+	ratioVerified float64,
+) (cost *big.Int, penalty *big.Int, err error) {
+	smoothedPow, err := util.TotalPowerSmoothed(ctx, api, ts)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	smoothedRew, err := util.ThisEpochRewardsSmoothed(ctx, api, ts)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	height := ts.Height()
+	activation := 4071894
+	expiration := 5619449
+	duration := abi.ChainEpoch(expiration - activation)
+	powerBaseEpoch := activation
+	replacedDayReward := big.NewInt(0)
+
+	dealWeight := big.NewInt(0)
+
+	scaledSectorSize := int64(float64(sectorSize) * ratioVerified)
+	verifiedDealWeight := new(big.Int).Mul(
+		big.NewInt(scaledSectorSize),
+		big.NewInt(int64(duration)),
+	)
+
+	pwr := miner.QAPowerForWeight(
+		abi.SectorSize(sectorSize),
+		duration,
+		filbig.NewFromGo(dealWeight),
+		filbig.NewFromGo(verifiedDealWeight),
+	)
+
+	expectedDayReward := miner.ExpectedRewardForPower(
+		util.ConvertSmoothing(smoothedRew),
+		util.ConvertSmoothing(smoothedPow),
+		pwr,
+		builtin.EpochsInDay,
+	)
+
+	expectedStoragePledge := miner.ExpectedRewardForPower(
+		util.ConvertSmoothing(smoothedRew),
+		util.ConvertSmoothing(smoothedPow),
+		pwr,
+		miner.InitialPledgeProjectionPeriod,
+	)
+
+	s := miner.SectorOnChainInfo{
+		Activation:            abi.ChainEpoch(activation),
+		Expiration:            abi.ChainEpoch(expiration),
+		DealWeight:            abi.DealWeight(filbig.NewFromGo(dealWeight)),
+		VerifiedDealWeight:    abi.DealWeight(filbig.NewFromGo(verifiedDealWeight)),
+		ExpectedDayReward:     expectedDayReward,
+		ExpectedStoragePledge: expectedStoragePledge,
+		PowerBaseEpoch:        abi.ChainEpoch(powerBaseEpoch),
+		ReplacedDayReward:     filbig.NewFromGo(replacedDayReward),
+	}
+	sectorPower := miner8.QAPowerForSector(abi.SectorSize(sectorSize), util.ConvertSectorType(&s))
+
+	termFee := miner8.PledgePenaltyForTermination(
+		s.ExpectedDayReward,
+		height-s.PowerBaseEpoch,
+		s.ExpectedStoragePledge,
+		smoothedPow,
+		sectorPower,
+		smoothedRew,
+		s.ReplacedDayReward,
+		s.PowerBaseEpoch-s.Activation,
+	)
+
+	// Pledge for full duration
+	pledge := miner.ExpectedRewardForPower(
+		util.ConvertSmoothing(smoothedRew),
+		util.ConvertSmoothing(smoothedPow),
+		pwr,
+		duration,
+	)
+
+	// Calculate number of sectors
+	sectors := new(big.Int).Quo(filToPledge, pledge.Int)
+
+	cost = new(big.Int).Mul(pledge.Int, sectors)
+	penalty = new(big.Int).Mul(termFee.Int, sectors)
+
+	return cost, penalty, nil
+}
diff --git a/terminate/onpledge_test.go b/terminate/onpledge_test.go
new file mode 100644
index 0000000..75dde7b
--- /dev/null
+++ b/terminate/onpledge_test.go
@@ -0,0 +1,41 @@
+package terminate
+
+import (
+	"context"
+	"math/big"
+	"testing"
+
+	"github.com/filecoin-project/go-state-types/abi"
+	"github.com/filecoin-project/lotus/chain/types"
+	"github.com/glifio/go-pools/constants"
+	"github.com/glifio/go-pools/util"
+)
+
+func TestTermPenaltyOnPledge(t *testing.T) {
+	ctx := context.Background()
+
+	lapi, closer := util.SetupSuite(t)
+	defer util.TeardownSuite(closer)
+
+	height := abi.ChainEpoch(4072417)
+	ts, err := lapi.ChainGetTipSetByHeight(context.Background(), height, types.EmptyTSK)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	filToPledge := new(big.Int).Mul(big.NewInt(1000), constants.WAD)
+	var sectorSize uint64 = 34359738368
+	var ratioVerified float64 = 1.0
+	cost, penalty, err := TermPenaltyOnPledge(ctx, lapi, ts, filToPledge, sectorSize, ratioVerified)
+	if err != nil {
+		t.Fatal(err)
+	}
+	expectedCost, _ := new(big.Int).SetString("999985869063292958098", 10)
+	if cost.Cmp(expectedCost) != 0 {
+		t.Errorf("expected cost %v, got %v", expectedCost, cost)
+	}
+	expectedPenalty, _ := new(big.Int).SetString("41721371161825193117", 10)
+	if penalty.Cmp(expectedPenalty) != 0 {
+		t.Errorf("expected penalty %v, got %v", expectedPenalty, penalty)
+	}
+}
diff --git a/util/termination.go b/util/termination.go
index b106ef1..db12c44 100644
--- a/util/termination.go
+++ b/util/termination.go
@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/filecoin-project/go-state-types/builtin/v13/miner"
+	smoothing13 "github.com/filecoin-project/go-state-types/builtin/v13/util/smoothing"
 	lotusapi "github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/blockstore"
 	"github.com/filecoin-project/lotus/chain/actors/adt"
@@ -34,6 +35,13 @@ func ConvertSectorType(sector *miner.SectorOnChainInfo) *miner8.SectorOnChainInf
 	}
 }
 
+func ConvertSmoothing(fe smoothing.FilterEstimate) smoothing13.FilterEstimate {
+	return smoothing13.FilterEstimate{
+		PositionEstimate: fe.PositionEstimate,
+		VelocityEstimate: fe.VelocityEstimate,
+	}
+}
+
 func TotalPowerSmoothed(ctx context.Context, api *lotusapi.FullNodeStruct, tsk *types.TipSet) (smoothing.FilterEstimate, error) {
 	pact, err := api.StateGetActor(ctx, power.Address, tsk.Key())
 	if err != nil {