diff --git a/lnwallet/channel.go b/lnwallet/channel.go
index 94e26805..30deb5a2 100644
--- a/lnwallet/channel.go
+++ b/lnwallet/channel.go
@@ -6179,21 +6179,13 @@ func (lc *LightningChannel) CreateCloseProposal(proposedFee btcutil.Amount,
 		return nil, nil, 0, ErrChanClosing
 	}
 
-	// Subtract the proposed fee from the appropriate balance, taking care
-	// not to persist the adjusted balance, as the feeRate may change
+	// Get the final balances after subtracting the proposed fee, taking
+	// care not to persist the adjusted balance, as the feeRate may change
 	// during the channel closing process.
-	localCommit := lc.channelState.LocalCommitment
-	ourBalance := localCommit.LocalBalance.ToSatoshis()
-	theirBalance := localCommit.RemoteBalance.ToSatoshis()
-
-	// We'll make sure we account for the complete balance by adding the
-	// current dangling commitment fee to the balance of the initiator.
-	commitFee := localCommit.CommitFee
-	if lc.channelState.IsInitiator {
-		ourBalance = ourBalance - proposedFee + commitFee
-	} else {
-		theirBalance = theirBalance - proposedFee + commitFee
-	}
+	ourBalance, theirBalance := CoopCloseBalance(
+		lc.channelState.ChanType, lc.channelState.IsInitiator,
+		proposedFee, lc.channelState.LocalCommitment,
+	)
 
 	closeTx := CreateCooperativeCloseTx(
 		fundingTxIn(lc.channelState), lc.channelState.LocalChanCfg.DustLimit,
@@ -6248,21 +6240,11 @@ func (lc *LightningChannel) CompleteCooperativeClose(
 		return nil, 0, ErrChanClosing
 	}
 
-	// Subtract the proposed fee from the appropriate balance, taking care
-	// not to persist the adjusted balance, as the feeRate may change
-	// during the channel closing process.
-	localCommit := lc.channelState.LocalCommitment
-	ourBalance := localCommit.LocalBalance.ToSatoshis()
-	theirBalance := localCommit.RemoteBalance.ToSatoshis()
-
-	// We'll make sure we account for the complete balance by adding the
-	// current dangling commitment fee to the balance of the initiator.
-	commitFee := localCommit.CommitFee
-	if lc.channelState.IsInitiator {
-		ourBalance = ourBalance - proposedFee + commitFee
-	} else {
-		theirBalance = theirBalance - proposedFee + commitFee
-	}
+	// Get the final balances after subtracting the proposed fee.
+	ourBalance, theirBalance := CoopCloseBalance(
+		lc.channelState.ChanType, lc.channelState.IsInitiator,
+		proposedFee, lc.channelState.LocalCommitment,
+	)
 
 	// Create the transaction used to return the current settled balance
 	// on this active channel back to both parties. In this current model,
diff --git a/lnwallet/commitment.go b/lnwallet/commitment.go
index d70f3ca0..ed7121d5 100644
--- a/lnwallet/commitment.go
+++ b/lnwallet/commitment.go
@@ -663,6 +663,28 @@ func CreateCommitTx(chanType channeldb.ChannelType,
 	return commitTx, nil
 }
 
+// CoopCloseBalance returns the final balances that should be used to create
+// the cooperative close tx, given the channel type and transaction fee.
+func CoopCloseBalance(chanType channeldb.ChannelType, isInitiator bool,
+	coopCloseFee btcutil.Amount, localCommit channeldb.ChannelCommitment) (
+	btcutil.Amount, btcutil.Amount) {
+
+	// Get both parties' balances from the latest commitment.
+	ourBalance := localCommit.LocalBalance.ToSatoshis()
+	theirBalance := localCommit.RemoteBalance.ToSatoshis()
+
+	// We'll make sure we account for the complete balance by adding the
+	// current dangling commitment fee to the balance of the initiator.
+	commitFee := localCommit.CommitFee
+	if isInitiator {
+		ourBalance = ourBalance - coopCloseFee + commitFee
+	} else {
+		theirBalance = theirBalance - coopCloseFee + commitFee
+	}
+
+	return ourBalance, theirBalance
+}
+
 // genHtlcScript generates the proper P2WSH public key scripts for the HTLC
 // output modified by two-bits denoting if this is an incoming HTLC, and if the
 // HTLC is being applied to their commitment transaction or ours.