diff --git a/x/auth/client/tx.go b/x/auth/client/tx.go
index 9036d7444..3bd61a8e1 100644
--- a/x/auth/client/tx.go
+++ b/x/auth/client/tx.go
@@ -129,26 +129,26 @@ func EnrichWithGas(txBldr authtypes.TxBuilder, cliCtx context.CLIContext, msgs [
 }
 
 // CalculateGas simulates the execution of a transaction and returns
-// both the estimate obtained by the query and the adjusted amount.
+// the simulation response obtained by the query and the adjusted amount.
 func CalculateGas(
 	queryFunc func(string, []byte) ([]byte, int64, error), cdc *codec.Codec,
 	txBytes []byte, adjustment float64,
-) (estimate, adjusted uint64, err error) {
+) (sdk.SimulationResponse, uint64, error) {
 
 	// run a simulation (via /app/simulate query) to
 	// estimate gas and update TxBuilder accordingly
 	rawRes, _, err := queryFunc("/app/simulate", txBytes)
 	if err != nil {
-		return estimate, adjusted, err
+		return sdk.SimulationResponse{}, 0, err
 	}
 
-	estimate, err = parseQueryResponse(cdc, rawRes)
+	simRes, err := parseQueryResponse(cdc, rawRes)
 	if err != nil {
-		return
+		return sdk.SimulationResponse{}, 0, err
 	}
 
-	adjusted = adjustGasEstimate(estimate, adjustment)
-	return estimate, adjusted, nil
+	adjusted := adjustGasEstimate(simRes.GasUsed, adjustment)
+	return simRes, adjusted, nil
 }
 
 // PrintUnsignedStdTx builds an unsigned StdTx and prints it to os.Stdout.
@@ -272,28 +272,27 @@ func GetTxEncoder(cdc *codec.Codec) (encoder sdk.TxEncoder) {
 }
 
 // nolint
-// SimulateMsgs simulates the transaction and returns the gas estimate and the adjusted value.
-func simulateMsgs(txBldr authtypes.TxBuilder, cliCtx context.CLIContext, msgs []sdk.Msg) (estimated, adjusted uint64, err error) {
+// SimulateMsgs simulates the transaction and returns the simulation response and the adjusted value.
+func simulateMsgs(txBldr authtypes.TxBuilder, cliCtx context.CLIContext, msgs []sdk.Msg) (sdk.SimulationResponse, uint64, error) {
 	txBytes, err := txBldr.BuildTxForSim(msgs)
 	if err != nil {
-		return
+		return sdk.SimulationResponse{}, 0, err
 	}
 
-	estimated, adjusted, err = CalculateGas(cliCtx.QueryWithData, cliCtx.Codec, txBytes, txBldr.GasAdjustment())
-	return
+	return CalculateGas(cliCtx.QueryWithData, cliCtx.Codec, txBytes, txBldr.GasAdjustment())
 }
 
 func adjustGasEstimate(estimate uint64, adjustment float64) uint64 {
 	return uint64(adjustment * float64(estimate))
 }
 
-func parseQueryResponse(cdc *codec.Codec, rawRes []byte) (uint64, error) {
-	var gasUsed uint64
-	if err := cdc.UnmarshalBinaryBare(rawRes, &gasUsed); err != nil {
-		return 0, err
+func parseQueryResponse(cdc *codec.Codec, rawRes []byte) (sdk.SimulationResponse, error) {
+	var simRes sdk.SimulationResponse
+	if err := cdc.UnmarshalBinaryBare(rawRes, &simRes); err != nil {
+		return sdk.SimulationResponse{}, err
 	}
 
-	return gasUsed, nil
+	return simRes, nil
 }
 
 // PrepareTxBuilder populates a TxBuilder in preparation for the build of a Tx.
diff --git a/x/auth/client/tx_test.go b/x/auth/client/tx_test.go
index 643f253a2..682868555 100644
--- a/x/auth/client/tx_test.go
+++ b/x/auth/client/tx_test.go
@@ -7,8 +7,8 @@ import (
 	"os"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
 	"github.com/tendermint/tendermint/crypto/ed25519"
 
 	"github.com/cosmos/cosmos-sdk/codec"
@@ -23,13 +23,18 @@ var (
 
 func TestParseQueryResponse(t *testing.T) {
 	cdc := makeCodec()
-	sdkResBytes := cdc.MustMarshalBinaryBare(uint64(10))
-	gas, err := parseQueryResponse(cdc, sdkResBytes)
-	assert.Equal(t, gas, uint64(10))
-	assert.Nil(t, err)
-	gas, err = parseQueryResponse(cdc, []byte("fuzzy"))
-	assert.Equal(t, gas, uint64(0))
-	assert.Error(t, err)
+	simRes := sdk.SimulationResponse{
+		GasInfo: sdk.GasInfo{GasUsed: 10, GasWanted: 20},
+		Result:  nil,
+	}
+
+	bz := cdc.MustMarshalBinaryBare(simRes)
+	res, err := parseQueryResponse(cdc, bz)
+	require.NoError(t, err)
+	require.Equal(t, 10, int(res.GasInfo.GasUsed))
+
+	res, err = parseQueryResponse(cdc, []byte("fuzzy"))
+	require.Error(t, err)
 }
 
 func TestCalculateGas(t *testing.T) {
@@ -37,9 +42,14 @@ func TestCalculateGas(t *testing.T) {
 	makeQueryFunc := func(gasUsed uint64, wantErr bool) func(string, []byte) ([]byte, int64, error) {
 		return func(string, []byte) ([]byte, int64, error) {
 			if wantErr {
-				return nil, 0, errors.New("")
+				return nil, 0, errors.New("query failed")
 			}
-			return cdc.MustMarshalBinaryBare(gasUsed), 0, nil
+			simRes := sdk.SimulationResponse{
+				GasInfo: sdk.GasInfo{GasUsed: gasUsed, GasWanted: gasUsed},
+				Result:  nil,
+			}
+
+			return cdc.MustMarshalBinaryBare(simRes), 0, nil
 		}
 	}
 
@@ -54,20 +64,24 @@ func TestCalculateGas(t *testing.T) {
 		args         args
 		wantEstimate uint64
 		wantAdjusted uint64
-		wantErr      bool
+		expPass      bool
 	}{
-		{"error", args{0, true, 1.2}, 0, 0, true},
-		{"adjusted gas", args{10, false, 1.2}, 10, 12, false},
+		{"error", args{0, true, 1.2}, 0, 0, false},
+		{"adjusted gas", args{10, false, 1.2}, 10, 12, true},
 	}
 
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			queryFunc := makeQueryFunc(tt.args.queryFuncGasUsed, tt.args.queryFuncWantErr)
-			gotEstimate, gotAdjusted, err := CalculateGas(queryFunc, cdc, []byte(""), tt.args.adjustment)
-			assert.Equal(t, err != nil, tt.wantErr)
-			assert.Equal(t, gotEstimate, tt.wantEstimate)
-			assert.Equal(t, gotAdjusted, tt.wantAdjusted)
+			simRes, gotAdjusted, err := CalculateGas(queryFunc, cdc, []byte(""), tt.args.adjustment)
+			if tt.expPass {
+				require.NoError(t, err)
+			} else {
+				require.Error(t, err)
+				require.Equal(t, simRes.GasInfo.GasUsed, tt.wantEstimate)
+				require.Equal(t, gotAdjusted, tt.wantAdjusted)
+			}
 		})
 	}
 }